Title page

HARDWARE MANUAL

VM600
machinery protection system (MPS)
(standard version)

Meggitt SA
Route de Moncor 4
PO Box 1616
1701 Fribourg
Switzerland

VM600 MPS hardware manual (standard version) MAMPS-HW/E energy@ch.meggitt.com

Edition 17 - February 2018 www.meggittsensing.com/energy
 REVISION RECORD SHEET

Date Written by /
Edition Description Signature
of issue modified by

1 25.08.98 R. Meyer Original edition. RM

2 29.01.99 R. Meyer Extensive revision. RM

3 28.05.99 R. Meyer General revision. RM

4 09.12.99 R. Meyer General revision. RM

5 30.06.03 R. Meyer General revision. RM

Networking section (Chapters 13 to 17 in Edition 5)

6 06.10.03 R. Meyer removed to form a separate document RM
(MAVM600-NET/E)

7 31.03.06 N. Parker (never published) NP

8 31.08.06 N. Parker Updated for new Corporate template NP

Change to storage temperature specifications, slimline rack

9 15.02.08 D. Evans DE
added, CSA contents verified
Update of processing channel structure in
10 04.04.08 D. Evans DE
chapter 4
Clarified the different hot-swapping requirements for cards
11 08.05.2012 Peter Ward in the front and cards in the rear of a rack. Updated in PW
accordance with the latest Meggitt brand guidelines.
Added information on the IRC4 intelligent relay card.
Reorganised slot number coding information for racks and
12 19.12.2012 Peter Ward cards. Added references to the VibroSight-based condition PW
monitoring cards: XMC16, XMV16, XMVS16 and XIO16T.
Fixed some minor errors and added multiple clarifications.
Added a note to clarify that the ABE056 slimline rack’s DC
input wiring has not changed (2.1.3 VM600 slimline rack –
19" rack with a height of 1U (ABE056)).
Updated power supply information labels used in drawings
to the latest WEEE version (2.10 RPS6U rack power supply
(ABE04x only) and 2.11 RPS1U rack power supply
(ABE056 only)).
Added a note to clarify that for the standard version of an
ABE04x rack, the case ground (rack chassis) is connected
to the VME ground (0 VA) when the standard version of an
MPC4 card is installed (9.10 Grounding options).
13 16.12.2013 Peter Ward PW
Clarified the operation of a networked rack during the hot
swap of a card (8.4.2 Subsequent installation of cards
("hot-swapping” capability)).
Added information on the channel inhibit function
(4.6.6 Channel inhibit function and 5.7.4 Channel inhibit
function) and the dual mathematical function (7.17 Dual
mathematical function).
Clarified how the VM600 MPS software calculates Smax
(7.7 Smax measurement).
Updated the temperatures in
Appendix A Environmental specifications.

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 Date Written by /
Edition Description Signature
of issue modified by
Added information on VM600 MPS rack (CPUM) security
(see 1.3 Communicating with the VM600 MPS and
6 CPUM / IOCN card pair).
Clarified the maximum current available for a VM600 rack
using two RPS6U rack power supplies (see 2.10.6 Racks
with two RPS6U rack power supplies in order to supply
power to the cards).
Added information on the difference between MPC4 and
MPC4SIL cards (4.1 Different versions of the MPC4 card).
Corrected the specification of the power supply in
4.4.2 Speed signal inputs to be consistent with
9 Configuration of MPC4 / IOC4T cards.
Clarified operation of OK system (that is, sensor OK check
in 4.7.1 OK system checking and 5.8.1 OK system
checking.
Added a table summarising the operation of LEDs on the
CPUM panel (see Table 6-1).
Added a table summarising the different processing modes
supported by the different versions of the MPC4 card
(see Table 7-1).
Corrected how the VM600 MPS software calculates Smax
14 30.06.2015 Peter Ward (7.7 Smax measurement) and added information on an PW
alternative way to calculate it (7.17 Dual mathematical
function).
Added information on narrow-band fixed frequency
processing (7.18 Narrow-band fixed frequency).
Added information on relay terminology (9.4.1 Relay
terminology) and clarified how to configure relays on an
IOC4T card in 9.4 Configuring the four local relays on the
IOC4T (updated Figure 9-24 and added 9.4.2 Operation of
relays).
Clarified the use of micro-switches to configure the relays
on an IOC8T card as NE/NDE (see 10.3 Configuring the
four local relays on the IOC8T).
Updated the fuse rating for racks running on an AC supply
(see 14.6.1 General checks for racks).
Clarified CPUM and IOCN connector terminology (RJxx
replaced by xPxC, as appropriate) and their use.
Updated to include the new CPU module (PFM-541I or
equivalent) fitted to the CPUM card (see 6 CPUM / IOCN
card pair, 13 Configuration of CPUM / IOCN cards and
Appendix A Environmental specifications) and removed all
references to the point-to-point protocol (PPP).

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 Date Written by /
Edition Description Signature
of issue modified by
Added additional information, including current input and
voltage input transfer ratios, to 4.4.3 Analog outputs.
Added additional important safety information in Electrical
safety and installation on page xiv, Hazardous voltages and
the risk of electric shock on page xv, Hot surfaces and the
risk of burning on page xv, Heavy objects and the risk of
injury on page xv and Replacement parts and accessories
on page xvi.
Also added additional important safety information to
2.10 RPS6U rack power supply (ABE04x only),
2.11 RPS1U rack power supply (ABE056 only),
8 Installation, 8.3 Rack safety requirements and
14 Maintenance and troubleshooting.
Added information on cleaning a VM600 rack in
15 25.05.2016 Peter Ward PW
14.3 Cleaning.
Updated the fuse information for racks running on an AC
supply (see 14.6.1 General checks for racks).
Added information on temperature derating for the power
entry module of a VM600 rack in A.4 Temperature derating
for the power entry module of a VM600 rack.
Corrected and clarified the optional serial communications
module (AIM104-COM4) jumper settings to configure
half-duplex or full-duplex RS-485 communications for
different versions of the CPUM card (using either the
PFM-541I or MSM586EN CPU module). See
13.3 Configuring A and B serial communications.
Updated 9.10 Grounding options and Figure 9-29 to clarify
the IOC4T card’s sensor shield grounding options.
Corrected the LP/HP ratio listed as a principal feature of
7.2 Broad-band absolute bearing vibration as the up to 100
limit applies to double integration only (an error introduced
in edition 12 of the manual incorrectly stated “up to 100 with
single or double integration”).
16 16.09.2016 Peter Ward Updated to include the improved RPS6U rack power supply PW
(see 2.10 RPS6U rack power supply (ABE04x only)), which
also included changes to the front panel, associated rear
panels and labelling. Some specification changes were also
required (see A.1 Overall and A.2 Operating temperatures
for individual VM600 system components).

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 Date Written by /
Edition Description Signature
of issue modified by
Added a statement that Meggitt SA product certifications
and warranties are valid only for products purchased
directly from Meggitt SA or an authorised distributor
(see IMPORTANT NOTICES).
Updated Figure 4-6 and Figure 5-3 to use “Alarm Reset”,
rather than “Latch reset or latch delay”.
Clarified the parameters that can be used for adaptive
monitoring (see 4.6.3 Adaptive monitoring).
Updated information on the channel inhibit function to
clarify its operation and reflect changes in the latest
versions of card firmware (see 4.6.6 Channel inhibit
function and 5.7.4 Channel inhibit function).
Updated status indicator LED information for the MPC4
card to include the behaviour for latched alarms (see
Figure 2-7 and 4.9 Operation of LEDs on MPC4 panel).
Updated status indicator LED information for the AMC8
card to include the behaviour for latched alarms (see
Figure 2-9 and 5.10 Operation of LEDs on AMC8 panel).
Updated the electrical circuit protection information to
include the improved RPS6U rack power supply
(see 8.3.2 Circuit breaker and 8.3.3 Supply wiring).
17 26.02.2018 Peter Ward Added connection diagrams for measurement chains using PW
a GSI127 connected to an IOC4T card
(see 9.2.4.1 Voltage-modulated signal with GSI127
galvanic separation unit and 9.3.4.1 Voltage-modulated
signal with GSI127 galvanic separation unit).
Updated 9.7 DSI control inputs (DB, TM, AR) and 10.5 DSI
control inputs (DB, AR) to clarify the type of
Alarm Reset (AR) signal required.
Added information on the voltage and current limits of the
IOC4T card’s common reference/return (RET) signal
(see 9.5 Configuring the four DC outputs and 9.7 DSI
control inputs (DB, TM, AR)).
Clarified that the IOCN card’s group A and group B
connectors primarily support RS-485 communication
(see 13.6.3 RS, A and B connectors).
Added end-of-life product disposal information
(see 15 End-of-life product disposal).
Updated the Energy product return procedure and form to
be consistent with the Meggitt Vibro-Meter ® website
(see 16 Service and support).
Updated the Power supply perturbation AC line frequencies
to use nominal values (see A.1 Overall).

Department Name Date Signature

Engineering Sylvain Queloz 17.10.2016 SQ

Technical content of original
issue approved by
Product Management Michaël Hafner 23.02.2018 MH

Document released by Technical Publications Peter Ward 26.02.2018 PW

The duly signed master copy of this page is stored by the Technical publications department of Meggitt SA
and can be obtained by writing to the Technical Publications Manager.

VM600 MPS hardware manual (standard version) MAMPS-HW/E v

Edition 17 - February 2018
 Important notices

IMPORTANT NOTICES
All statements, technical information, and recommendations in this document which relate to the products supplied
by Meggitt SA (Meggitt Sensing Systems) are based on information believed to be reliable, but unless otherwise
expressly agreed in writing with Meggitt SA the accuracy or completeness of such data is not guaranteed. Before
using this product, you must evaluate it and determine if it is suitable for your intended application. You should also
check our website at www.meggittsensing.com/energy for any updates to data sheets, Ex certificates, product
drawings, user manuals, service bulletins and/or other instructions affecting the product.
Unless otherwise expressly agreed in writing with Meggitt SA, you assume all risks and liability associated with use
of the product. Meggitt SA takes no responsibility for any statements related to the product which are not contained
in a current English language Meggitt SA (Meggitt Sensing Systems) publication, nor for any statements contained
in extracts, summaries, translations or any other documents not authored and produced by Meggitt SA.
The certifications and warranties applicable to the products supplied by Meggitt SA are valid only for new products
purchased directly from Meggitt SA or from an authorised distributor of Meggitt SA.
Meggitt SA reserves the right to alter any part of this publication without prior notice.

EXPORT CONTROL
The information contained in this document may be subject to export control regulations of the European
Community, USA or other countries. Each recipient of this document is responsible for ensuring that the transfer or
use of any information contained in this document complies with all relevant export control regulations. ECN N/A.

COPYRIGHT
Copyright © 2008-2018 Meggitt SA
All rights reserved
Published and printed by Meggitt SA in Fribourg, Switzerland
The names of actual companies and products mentioned
herein may be the trademarks of their respective owners.
The information contained in this document is subject to change without notice.
This information shall not be used, duplicated or disclosed, in whole or in part,
without the express written permission of Meggitt SA (Meggitt Sensing Systems).

vi VM600 MPS hardware manual (standard version) MAMPS-HW/E

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 PREFACE

About this manual

This manual provides information on the VM600 series machinery protection system (MPS),
from the Meggitt Sensing Systems’ Vibro-Meter ® product line.
It offers information concerning the installation, configuration and general use of the system.

About Meggitt, Meggitt Sensing Systems and Vibro-Meter

Headquartered in the UK, Meggitt PLC is a global engineering group specialising in extreme
environment components and smart sub-systems for aerospace, defence and energy
markets.
Meggitt Sensing Systems is the operating division of Meggitt specialising in sensing and
monitoring systems, which has operated through its antecedents since 1927 under the
names of ECET, Endevco, Ferroperm Piezoceramics, Lodge Ignition, Sensorex and
Vibro-Meter. Today, these operations are integrated under one strategic business unit called
Meggitt Sensing Systems, headquartered in Switzerland and providing complete systems,
using these renowned brands, from a single supply base.
The Meggitt Sensing Systems facility in Fribourg, Switzerland operates as the legal entity
Meggitt SA (formerly Vibro-Meter SA). This site produces a wide range of vibration, dynamic
pressure, proximity, air-gap and other sensors capable of operation in extreme environments,
electronic monitoring and protection systems, and innovative software for aerospace and
land-based turbomachinery. This includes the VM600 machinery protection system (MPS)
produced for the Vibro-Meter ® product line.

Who should use this manual?

The manual is written for operators of process monitoring/control systems using a
VM600 machinery protection system (MPS).
Operators are assumed to have the necessary technical training in electronics and
mechanical engineering (professional certificate/diploma, or equivalent) to enable them to
install, program and use the system.

Applicability of the manual

The manual applies to a VM600 machinery protection system (MPS) using the new
generation of VM600 MPC4 cards (hardware versions 03x, 11x, 21x and subsequent
models). These later cards are easily distinguished from earlier models as they have seven
LEDs on their panels, whereas previous versions (01x and 02x) had only one LED (identified
as DIAG).
Users of systems having earlier versions of the MPC4 card should refer to edition 4 of this
manual.

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Structure of the manual
This section gives an overview of the structure of the document and the information contained
within it. Some information has been deliberately repeated in different sections of the
document to minimise cross-referencing and to facilitate understanding through reiteration.
The chapters are presented in a logical order. You should read those that are most relevant
to you and then keep the document at hand for future reference.

The structure of the document is as follows:

Safety Contains important information for your personal safety and the
correct use of the equipment.
THIS SECTION SHOULD BE READ BEFORE ATTEMPTING TO INSTALL
OR USE THE EQUIPMENT.

Part I: Functional description of VM600 MPS system

Chapter 1 Introduction – Familiarises the user with the function and features of the MPS.
Chapter 2 Overview of VM600 MPS hardware – Provides information on the physical
aspects of the various cards and other components making up the system.
Describes the elements on the panels of the cards and system components.
Chapter 3 General system description – Describes the MPS from a global, rack-level
point of view. Introduces the MPC4 / IOC4T and AMC8 / IOC8T card pairs.
Describes the rack backplane and its buses.
Chapter 4 MPC4 / IOC4T card pair – Contains a block diagram of this card pair and
information on the signal processing performed by it. Provides details on
inputs and outputs, rectification techniques, alarm monitoring possibilities
(levels, delay time, hysteresis, logical combinations), the OK System and the
operation of the LEDs on the panel of the MPC4.
Chapter 5 AMC8 / IOC8T card pair – Contains a block diagram of this card pair and
information on the signal processing performed by it. Provides details on
inputs and outputs, processing functions, alarm monitoring possibilities
(levels, delay time, hysteresis, logical combinations), the OK System and the
operation of the LEDs on the panel of the AMC8.
Chapter 6 CPUM / IOCN card pair – Provides a brief overview of the function of this card
pair and contains a block diagram of each card.
Chapter 7 Processing modes and applications – Describes the operation of the MPS in
all its operating configurations (broad-band vibration, shaft relative vibration,
eccentricity, dynamic pressure and so on). Processing steps are shown in
block diagrams and additional background information on the measurement
type is provided.

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Part II: Installing VM600 MPS hardware and using the system

Chapter 8 Installation – Provides information on installing the cards and power supplies
in the VM600 MPS rack.
Chapter 9 Configuration of MPC4 / IOC4T cards – Describes the connectors on the
IOC4T card. Includes typical connection diagrams for measurement signal
sensors (for example, accelerometers, proximity probes) and speed signal
sensors. Contains information on attributing specific alarm signals to specific
relays on RLC16 cards using the Open Collector Bus and the Raw Bus.
Chapter 10 Configuration of AMC8 / IOC8T cards – Describes the connectors on the
IOC8T card. Includes typical connection diagrams for thermocouples, RTD
devices as well as other sensors providing a voltage-based or current-based
signal. Contains information on attributing specific alarm signals to specific
relays on RLC16 cards using the Open Collector Bus and the Raw Bus.
Chapter 11 Using the RLC16 card – Provides information on the screw terminal strips on
these relay cards.
Chapter 12 Using the IRC4 card – Provides information on the screw terminal strips on
these relay cards. Also contains information on attributing specific alarm
signals to specific relays on an IRC4 using the Open Collector and Raw
buses.
Chapter 13 Configuration of CPUM / IOCN cards – Contains details on configuring
jumpers on the two cards, as well as information on connectors.

Part III: Maintenance and technical support

Chapter 14 Maintenance and troubleshooting – Contains some basic tips for fault-finding.
Also includes information on long-term storage of racks.
Chapter 15 End-of-life product disposal – Provides information and contact details
concerning the environmentally friendly disposal of electrical/electronic
equipment at the end of its useful life.
Chapter 16 Service and support – Provides contact details for technical queries and
information concerning the repair and return of equipment.

Part IV: Appendices

Appendix A Environmental specifications – Contains general environmental

specifications for the entire machinery protection system viewed as a whole.
Appendix B Data sheets – Includes data sheet information for all cards and other system
components used in the VM600 MPS. The data sheets provide full electrical
and mechanical specifications, ordering information and so on.
Appendix C Definition of backplane connector pins – Contains pin definitions for
connectors P1, P2, P3 and P4 for each slot in the ABE04x rack.
Appendix D Abbreviations and symbols – Contains a list of abbreviations and
measurement unit symbols used in this document.

Product Defect Report Allows the user to indicate problems observed on a

module/system component, thus enabling our
Customer support department to repair the equipment
as quickly as possible.
Documentation Evaluation Form Allows the user to provide us with valuable feedback
on our documentation.

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Terminology

MPC4 cards

NOTE: The MPC4 machinery protection card is available in different versions, including a
standard version, a separate circuits version and a safety (SIL) version.
See 4 MPC4 / IOC4T card pair for additional information.

In general, MPC4 is used in this manual to refer to all versions of the card. However, where
it is necessary to make a distinction, MPC4 is used to indicate the standard and separate
circuits versions of the card and MPC4SIL is used to indicate the safety version.

Software
VM600 MPSx is proprietary software from Meggitt Sensing Systems that can configure and
manage VM600 racks containing AMC8 and MPC4 cards:
• VM600 MPS1© allows the complete configuration of a VM600 machinery protection
system and the display of live data. It is intended to be used for machinery protection
applications.
• VM600 MPS2© allows the complete configuration of a VM600 machinery protection
system and the display of historical or live data. It is intended to be used for machinery
protection and/or basic condition monitoring applications.
(VM600 MPS2 includes all of the functionality provided by the VM600 MPS1 software
with additional features, such as plots for the visualisation and trending of data.)
VibroSight ® is proprietary software from Meggitt Sensing Systems that can configure and
manage VM600 XMx16 cards such as the XMC16, XMV16 and XMVS16, and/or
VibroSmart ® distributed monitoring system (DMS) modules such as the VSI010 and
VSV300.
VM600 IRC4 Configurator is proprietary software from Meggitt Sensing Systems that can
configure and manage IRC4 cards.

Related publications and documentation

For further information on the use of a VM600 machinery protection system (MPS), refer to
the following Meggitt Sensing Systems (MSS) documentation:
• MPCC configuration software for VM600 series machinery protection card
(MSS document ref. MAMPCC-30/E)
• VM600 MPS1 configuration software for machinery protection systems software manual
(MSS document ref. MAMPS1-SW/E)
• VM600 MPS2 configuration software for machinery protection systems software manual
(MSS document ref. MAMPS2-SW/E)
• IRC4 Configurator for intelligent relay cards software manual
(MSS document ref. MAIRC4-SW/E).
Operators of networked VM600 racks should also refer to the following document:
• VM600 networking manual
(MSS document ref. MAVM600-NET/E).
Operators of safety-related systems (SRSs) should also refer to the following document:
• VM600 safety manual
(MSS document ref. MAVM600-FS/E).

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 For information on the use of a VM600 condition monitoring system (CMS), refer to the
following Meggitt Sensing Systems (MSS) documentation:
• VM600 condition monitoring system (CMS) hardware manual
(MSS document ref. MACMS-HW/E).

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 SAFETY

Symbols and styles used in this manual

The following symbols are used in this manual where appropriate:

The WARNING safety symbol

THIS INTRODUCES DIRECTIVES, PROCEDURES OR PRECAUTIONARY MEASURES WHICH
MUST BE EXECUTED OR FOLLOWED. FAILURE TO OBEY A WARNING CAN RESULT IN
INJURY TO THE OPERATOR OR THIRD PARTIES.

The CAUTION safety symbol

This draws the operator's attention to information, directives or procedures
which must be executed or followed. Failure to obey a caution can result in
damage to equipment.

The ELECTROSTATIC SENSITIVE DEVICE symbol

This indicates that the device or system being handled can be damaged by
electrostatic discharges. See Handling precautions for electrostatic
sensitive devices on page xvi for further information.

NOTE: The NOTE symbol. This draws the operator's attention to complementary
information or advice relating to the subject being treated.

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Important remarks on safety
Read this manual carefully and observe the safety instructions before
installing and using the equipment described.
By doing this, you will be aware of the potential hazards and be able to work
safely, ensuring your own protection and also that of the equipment.

Every effort has been made to include specific safety-related procedures in this manual using
the symbols described above. However, operating personnel are expected to follow all
generally accepted safety procedures.
All personnel who are liable to operate the equipment described in this manual should be
trained in the correct safety procedures.
Meggitt Sensing Systems does not accept any liability for injury or material damage caused
by failure to obey any safety-related instructions or due to any modification, transformation or
repair carried out on the equipment without written permission from Meggitt SA. Any
modification, transformation or repair carried out on the equipment without written permission
from Meggitt SA will invalidate any warranty.

Electrical safety and installation

WHEN INSTALLING A VM600 RACK, OBSERVE ALL SAFETY (WARNING AND CAUTION)
STATEMENTS IN THIS MANUAL AND FOLLOW ALL NATIONAL AND LOCAL ELECTRICAL
CODES.

ONLY TRAINED AND QUALIFIED PERSONNEL (SUCH AS A QUALIFIED/LICENSED

ELECTRICIAN) SHOULD BE ALLOWED TO INSTALL OR REPLACE THIS EQUIPMENT.

CHECK NATIONAL AND LOCAL ELECTRICAL CODES, REGULATIONS AND DIRECTIVES

BEFORE WIRING.

A VM600 RACK MUST BE DIRECTLY AND PERMANENTLY CONNECTED TO PROTECTIVE

EARTH (PE) USING THE EARTH CONDUCTOR OF THE EXTERNAL MAINS POWER SUPPLY
LEAD, IN ORDER TO HELP PREVENT THE RISK OF ELECTRIC SHOCK.

SELECT CABLE WIRE SIZES AND CONNECTORS (CURRENT-CARRYING CAPACITY),

INCLUDING THE EXTERNAL MAINS POWER SUPPLY LEAD, TO MEET THE REQUIREMENTS
OF THE APPLICATION IN ACCORDANCE WITH THE APPLICABLE NATIONAL AND LOCAL
ELECTRICAL CODES.

CHECKS TO ENSURE ELECTRICAL SAFETY SHOULD BE CARRIED OUT BY A COMPETENT

PERSON.

DEFLECTION PLATES (BARRIERS) MUST BE INSTALLED ABOVE AND BELOW A VM600

RACK IN ORDER TO HELP REDUCE THE RISK OF ELECTRICAL SHOCK AND IN THE CASE
OF THE BARRIER INSTALLED BELOW A VM600, IN ORDER TO HELP PREVENT THE
SPREAD OF FIRE TOO.

FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN DEATH, SERIOUS INJURY,

AND/OR EQUIPMENT DAMAGE.

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Hazardous voltages and the risk of electric shock
HAZARDOUS VOLTAGES EXIST WITHIN A VM600 RACK.
WHEN A CARD, PANEL OR POWER SUPPLY IS REMOVED FROM A VM600 RACK, THE
RACK BACKPLANE – CONTAINING HAZARDOUS VOLTAGES – IS EXPOSED AND THERE
IS THE RISK OF ELECTRIC SHOCK, AS INDICATED BY THE USE OF THE FOLLOWING
WARNING LABEL ON THE EQUIPMENT:

REGARD ANY EXPOSED COMPONENT, CONNECTOR OR PRINTED CIRCUIT BOARD (PCB)

AS A POSSIBLE SHOCK HAZARD AND DO NOT TOUCH WHEN ENERGISED.

FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN DEATH, SERIOUS INJURY,

AND/OR EQUIPMENT DAMAGE.

Hot surfaces and the risk of burning

HOT SURFACES CAN EXIST WITHIN AND ON A VM600 RACK.
DEPENDING ON THE AMBIENT OPERATING TEMPERATURE AND POWER CONSUMPTION,
AND THE INSTALLATION AND COOLING OF A VM600 RACK, THE TOP OF THE RACK CAN
BECOME HOT TO TOUCH AND THERE IS THE RISK OF BURNING WHEN HANDLING THE
RACK, AS INDICATED BY THE USE OF THE FOLLOWING WARNING LABEL ON THE
EQUIPMENT:

REGARD THE TOP OF A VM600 RACK AS A HOT SURFACE AND DO NOT TOUCH
UNLESS COOL.

FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN INJURY.

Heavy objects and the risk of injury

A POPULATED VM600 SYSTEM RACK WITH CARDS AND RACK POWER SUPPLIES
INSTALLED IS A HEAVY OBJECT.

DEPENDING ON THE NUMBER OF VM600 CARDS AND RPS6U RACK POWER SUPPLIES
INSTALLED, A VM600 SYSTEM RACK (ABE04x) CAN BE TOO HEAVY TO LIFT, LOWER
OR OTHERWISE HANDLE MANUALLY AND THERE IS THE RISK OF INJURY DURING
INSTALLATION OR REMOVAL.

REGARD A POPULATED VM600 SYSTEM RACK AS A HEAVY OBJECT AND DO NOT

HANDLE MANUALLY UNTIL ANY RPS6U RACK POWER SUPPLIES (AND VM600 CARDS
AS NECESSARY) HAVE BEEN REMOVED IN ORDER TO REDUCE THE WEIGHT, AS THESE
ARE THE HEAVIEST SYSTEM COMPONENTS THAT CAN BE EASILY REMOVED.

FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN INJURY.

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Replacement parts and accessories
Use only approved replacement parts and accessories.
Do not connect with incompatible products or accessories.
Only use replacement parts and accessories intended for use with
VM600 racks that have been approved by Meggitt SA.
Using incompatible replacement parts and accessories could be
dangerous and may damage the equipment or result in injury.

For information on replacement parts and accessories:

• Visit the Meggitt Vibro-Meter ® website at www.meggittsensing.com/energy
• Contact your local Meggitt Sensing Systems representative.

Handling precautions for electrostatic sensitive devices

Certain devices used in electronic equipment can be damaged by electrostatic discharges
resulting from built-up static electricity. Because of this, special precautions must be taken to
minimise or eliminate the possibility of these electrostatic discharges occurring.

Read the following recommendations carefully before handling electronic

circuits, printed circuit boards or modules containing electronic
components.

• Before handling electronic circuits, discharge the static electricity from your body by
touching and momentarily holding a grounded metal object (such as a pipe or cabinet).
• Avoid the build-up of static electricity on your body by not wearing synthetic clothing
material, as these tend to generate and store static electric charges. Cotton or cotton
blend materials are preferred because they do not store static electric charges.
• Do not handle electronic circuits unless it is absolutely necessary. Only hold cards by
their handles or panels.
• Do not touch printed circuit boards, their connectors or their components with conductive
devices or with your hands.
• Put the electronic circuit, printed circuit board or module containing electronic
components into an antistatic protective bag immediately after removing it from a VM600
rack.

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Edition 17 - February 2018
 TABLE OF CONTENTS

TITLE PAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

REVISION RECORD SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

IMPORTANT NOTICES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1 Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 General overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.3 Communicating with the VM600 MPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

2 OVERVIEW OF VM600 MPS HARDWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1 Racks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1 VM600 system rack – 19" rack with a height of 6U (ABE04x) . . . . . . . . . . 2-1
2.1.2 Slot number coding for cards in the rear of an ABE04x rack . . . . . . . . . . . 2-3
2.1.3 VM600 slimline rack – 19" rack with a height of 1U (ABE056) . . . . . . . . . . 2-5
2.1.4 Slot number coding for cards in the rear of an ABE056 rack . . . . . . . . . . . 2-6
2.2 MPC4 machinery protection card (ABE04x and ABE056) . . . . . . . . . . . . . . . . . . . 2-7
2.3 IOC4T input/output card (ABE04x and ABE056) . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
2.4 AMC8 analog monitoring card (ABE04x and ABE056). . . . . . . . . . . . . . . . . . . . . 2-10
2.5 IOC8T input/output card (ABE04x and ABE056) . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
2.6 CPUM modular CPU card (ABE04x only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.7 IOCN input/output card (ABE04x only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.8 RLC16 relay card (ABE04x and ABE056) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
2.9 IRC4 intelligent relay card (ABE04x and ABE056) . . . . . . . . . . . . . . . . . . . . . . . . 2-16
2.10 RPS6U rack power supply (ABE04x only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
2.10.1 Different versions of the RPS6U rack power supply. . . . . . . . . . . . . . . . . 2-17
2.10.2 Identifying different versions of the RPS6U rack power supply . . . . . . . . 2-18
2.10.3 General overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
2.10.4 RPS6U rack power supply and VM600 card considerations . . . . . . . . . . 2-19

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 2.10.5 Racks with two RPS6U rack power supplies in order to
support rack power supply redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
2.10.6 Racks with two RPS6U rack power supplies in order to
supply power to the cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
2.10.7 Racks supporting external mains power-supply system redundancy . . . . 2-21
2.10.8 Front panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
2.10.9 Associated rear panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
2.10.10Power supply check relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
2.10.11Power supply labelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42
2.10.12Auxiliary sensor power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43
2.11 RPS1U rack power supply (ABE056 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44
2.11.1 Power supply check relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44
2.11.2 Power supply labelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46

3 GENERAL SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1 System elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2 Rack with MPC4 / IOC4T card pairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.3 Rack with AMC8 / IOC8T card pairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.4 VM600 6U 19" rack backplane (ABE04x) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.4.1 General overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.4.2 Tacho Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.4.3 Open Collector Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
3.4.4 Raw Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
3.5 VM600 1U 19" rack backplane (ABE056) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Part I: Functional description of VM600 MPS system

4 MPC4 / IOC4T CARD PAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.1 Different versions of the MPC4 card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.1.1 Standard version of the MPC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1.2 Separate circuits version of the MPC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1.3 Safety version of the MPC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1.4 Identifying different versions of the MPC4 card . . . . . . . . . . . . . . . . . . . . . 4-2
4.2 General block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.3 Overview of MPC4 operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
4.3.1 Sensor signal conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
4.3.2 Signal routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
4.3.3 Signal processing and monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

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 4.4 Inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
4.4.1 Measurement signal inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
4.4.2 Speed signal inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
4.4.3 Analog outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
4.4.4 DC outputs (IOC4T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
4.5 Rectification techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
4.6 Alarm monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
4.6.1 Monitoring possibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
4.6.2 Logical combinations of alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
4.6.3 Adaptive monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
4.6.4 Direct Trip Multiply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
4.6.5 Danger Bypass function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
4.6.6 Channel inhibit function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
4.7 System self-checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
4.7.1 OK system checking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
4.7.2 Built-in test equipment (BITE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
4.7.3 Overload checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
4.8 MPC4 power-up sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
4.8.1 Power-up after live insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
4.9 Operation of LEDs on MPC4 panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
4.9.1 Global DIAG/STATUS indicator LED for the card . . . . . . . . . . . . . . . . . . 4-26
4.9.2 Individual status indicator LEDs for measurement channels . . . . . . . . . . 4-27
4.9.3 Individual status indicator LEDs for speed channels . . . . . . . . . . . . . . . . 4-29

5 AMC8 / IOC8T CARD PAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.1 General block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2 Overview of AMC8 / IOC8T operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.2.1 Sensor signal conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.2.2 Signal routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.2.3 Signal processing and monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.3 Inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5.3.1 Measurement signal inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5.3.2 DC outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5.4 Multi-channel processing functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.5 Time-domain processing functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.6 Linearity compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

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 5.7 Alarm monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5.7.1 Monitoring possibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5.7.2 Logical combinations of alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.7.3 Danger Bypass function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
5.7.4 Channel inhibit function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
5.8 System self-checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
5.8.1 OK system checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
5.8.2 Built-in self test (BIST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
5.9 AMC8 power-up sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
5.9.1 Power-up after live insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
5.10 Operation of LEDs on AMC8 panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
5.10.1 Global DIAG/STATUS indicator LED for the card . . . . . . . . . . . . . . . . . . . 5-14
5.10.2 Individual status indicator LEDs for measurement channels . . . . . . . . . . 5-15

6 CPUM / IOCN CARD PAIR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1 Different versions of the CPUM card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2 General overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.3 VM600 MPS rack (CPUM) security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.4 Block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
6.5 Serial port naming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
6.6 Operation of LEDs on CPUM panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
6.6.1 DIAG LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

7 PROCESSING MODES AND APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.1 Different versions of the MPC4 card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.2 Broad-band absolute bearing vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
7.3 Tracking (narrow-band vibration analysis) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
7.4 Shaft relative vibration with gap monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
7.5 Shaft absolute vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7
7.6 Position measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
7.7 Smax measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
7.8 Eccentricity measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13
7.9 Shaft relative expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14
7.9.1 Shaft collar method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15
7.9.2 Double shaft taper method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17
7.9.3 Single shaft taper method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-19
7.9.4 Pendulum method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-21
7.10 Absolute housing expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23

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 7.11 Differential housing expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-24
7.12 Broad-band pressure monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25
7.13 Quasi-static pressure monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26
7.14 Differential quasi-static pressure monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27
7.15 Quasi-static temperature monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27
7.16 Differential quasi-static temperature monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28
7.17 Dual mathematical function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29
7.18 Narrow-band fixed frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-31

Part II: Installing VM600 MPS hardware and using the system

8 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8.2 Attribution of slots in the rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
8.3 Rack safety requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
8.3.1 Adequate ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
8.3.2 Circuit breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
8.3.3 Supply wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
8.3.4 Instructions for locating and mounting . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
8.4 Installation procedure for cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
8.4.1 First-time installation of the MPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12
8.4.2 Subsequent installation of cards ("hot-swapping” capability) . . . . . . . . . . 8-12
8.4.3 Setting the IP address of the CPUM card. . . . . . . . . . . . . . . . . . . . . . . . . 8-18

9 CONFIGURATION OF MPC4 / IOC4T CARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.1 Definition of screw terminals on the IOC4T card . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.2 Connecting vibration and pressure sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
9.2.1 General considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
9.2.2 Connection diagrams for hardware powered by IOC4T / MPC4 . . . . . . . 9-10
9.2.3 Connection diagrams for unpowered hardware . . . . . . . . . . . . . . . . . . . . 9-13
9.2.4 Connection diagrams for externally powered hardware . . . . . . . . . . . . . . 9-14
9.2.5 Connection diagram for frequency generator . . . . . . . . . . . . . . . . . . . . . . 9-19
9.3 Connecting speed sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-20
9.3.1 General considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-21
9.3.2 Connection diagrams for hardware powered by IOC4T / MPC4 . . . . . . . 9-23
9.3.3 Connection diagrams for unpowered hardware . . . . . . . . . . . . . . . . . . . . 9-25
9.3.4 Connection diagrams for externally powered hardware . . . . . . . . . . . . . . 9-26
9.3.5 Connection diagram for frequency generator . . . . . . . . . . . . . . . . . . . . . . 9-29
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 9.4 Configuring the four local relays on the IOC4T . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-30
9.4.1 Relay terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-31
9.4.2 Operation of relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-31
9.5 Configuring the four DC outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-35
9.6 Buffered (raw) outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-37
9.7 DSI control inputs (DB, TM, AR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-37
9.8 Channel inhibit function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-38
9.9 Slot number coding for IOC4T cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-39
9.9.1 VM600 system rack (ABE04x) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-39
9.9.2 VM600 slimline rack (ABE056) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-40
9.10 Grounding options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-40
9.11 Using the Raw Bus to share measurement channel inputs. . . . . . . . . . . . . . . . . . 9-41
9.12 Assigning alarm signals to relays on the RLC16 card . . . . . . . . . . . . . . . . . . . . . . 9-44
9.12.1 Using the Open Collector Bus (OC Bus) to switch relays . . . . . . . . . . . . . 9-45
9.12.2 Using the Raw Bus to switch relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-48
9.13 Assigning alarm signals to relays on the IRC4 card . . . . . . . . . . . . . . . . . . . . . . . 9-55

10 CONFIGURATION OF AMC8 / IOC8T CARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10.1 Definition of screw terminals on the IOC8T card . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10.2 Connecting sensors to the IOC8T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
10.2.1 Setting of jumper J805 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
10.2.2 Connecting thermocouples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
10.2.3 Connecting RTD devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8
10.2.4 Connecting other sensors (process values) . . . . . . . . . . . . . . . . . . . . . . 10-11
10.3 Configuring the four local relays on the IOC8T . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13
10.3.1 Relay terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13
10.3.2 Operation of relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13
10.4 Configuring the eight DC outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13
10.5 DSI control inputs (DB, AR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
10.6 Channel inhibit function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
10.7 Slot number coding for IOC8T cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
10.7.1 VM600 system rack (ABE04x) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
10.7.2 VM600 slimline rack (ABE056) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15
10.8 Assigning alarm signals to relays on the RLC16 card . . . . . . . . . . . . . . . . . . . . . 10-16
10.8.1 Using the Open Collector Bus (OC Bus) to switch relays . . . . . . . . . . . . 10-17
10.8.2 Using the Raw Bus to switch relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-20
10.9 Assigning alarm signals to relays on the IRC4 card . . . . . . . . . . . . . . . . . . . . . . 10-27

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11 USING THE RLC16 CARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

11.1 Definition of screw terminals on the RLC16 card . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

11.2 Connecting the RLC16 relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4
11.2.1 Relay terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4
11.2.2 Operation of relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4
11.3 Configuring the RLC16 card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5
11.4 Slot number coding for RLC16 cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5

12 USING THE IRC4 CARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

12.1 General block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

12.2 Definition of the screw terminals on the IRC4 card. . . . . . . . . . . . . . . . . . . . . . . . 12-1
12.3 Connecting relays to the IRC4 card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-4
12.3.1 Relay terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-4
12.3.2 Operation of relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-4
12.4 Configuring the IRC4 card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-4
12.5 Slot number coding for IRC4 cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-5
12.5.1 VM600 system rack (ABE04x) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-5

13 CONFIGURATION OF CPUM / IOCN CARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

13.1 Configuring Ethernet communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

13.2 Configuring RS serial communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2
13.2.1 RS-232 selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2
13.2.2 RS-485 selection, half-duplex (2-wire) configuration . . . . . . . . . . . . . . . . 13-2
13.2.3 RS-485 selection, full-duplex (4-wire) configuration . . . . . . . . . . . . . . . . . 13-3
13.3 Configuring A and B serial communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-4
13.3.1 RS-485 selection, half-duplex (2-wire) configuration . . . . . . . . . . . . . . . . 13-4
13.3.2 RS-485 selection, full-duplex (4-wire) configuration . . . . . . . . . . . . . . . . . 13-4
13.4 Configuring RS-485 terminations for RS, A and B serial communications . . . . . . 13-7
13.4.1 CPUM card (carrier board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-8
13.4.2 Optional serial communications module (AIM104-COM4 or equivalent) . 13-8
13.5 Additional jumpers on the IOCN card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-9
13.5.1 Linking the RS and A serial communications connectors. . . . . . . . . . . . . 13-9
13.6 Connectors on the IOCN card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-10
13.6.1 Modular connector pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-10
13.6.2 Ethernet connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-10
13.6.3 RS, A and B connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-11
13.7 Location of components on the CPUM card (later PFM-541I version) . . . . . . . . 13-12
13.8 Location of components on the CPUM card (earlier MSM586EN version). . . . . 13-13

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 13.9 Location of components on the IOCN card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14
13.10 Upgrading the version of firmware running on a CPUM card . . . . . . . . . . . . . . . 13-15

Part III: Maintenance and technical support

14 MAINTENANCE AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

14.1 Long-term storage of racks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

14.1.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1
14.1.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1
14.2 Modifications and repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2
14.3 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2
14.4 General remarks on fault-finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2
14.5 Detecting problems due to front-end components and cabling . . . . . . . . . . . . . . . 14-3
14.5.1 Replacing a suspect front-end component or cable . . . . . . . . . . . . . . . . . 14-3
14.6 Detecting problems in the VM600 MPS rack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-4
14.6.1 General checks for racks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-4
14.6.2 Replacing a suspect card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-5
14.7 Checking the MPC4 for processing overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-12

15 END-OF-LIFE PRODUCT DISPOSAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1

16 SERVICE AND SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1

16.1 Contacting us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1

16.2 Technical support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1
16.3 Sales and repairs support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1
16.4 Customer feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-2

ENERGY PRODUCT RETURN FORM

ENERGY CUSTOMER FEEDBACK FORM

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Part IV: Appendices

A ENVIRONMENTAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.1 Overall. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.2 Operating temperatures for individual VM600 system components . . . . . . . . . . . . A-3
A.3 Storage temperatures for individual VM600 system components. . . . . . . . . . . . . . A-4
A.4 Temperature derating for the power entry module of a VM600 rack . . . . . . . . . . . A-5

B DATA SHEETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

C DEFINITION OF BACKPLANE CONNECTOR PINS . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

D ABBREVIATIONS AND SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

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 INTRODUCTION
Applications

1 INTRODUCTION

1.1 Applications
The VM600 machinery protection system (MPS) is a digital machinery protection system
designed for use in industrial applications. It is intended primarily for vibration monitoring to
assure the protection of rotating machinery as used in, for example, the power generation,
petro-chemical and petroleum industries as well as in marine related applications.

1.2 General overview

The VM600 series of machinery protection and condition monitoring systems from Meggitt
Sensing Systems’ Vibro-Meter ® product line are based around a 19" rack (1U or 6U)
containing various types of cards, depending on the application.
There are basically two types of system:
• Machinery protection system (MPS – 1U or 6U rack)
• Condition monitoring system (CMS – 1U or 6U rack).
It is also possible to integrate machinery protection and condition monitoring hardware into
the same 6U (ABE04x) rack.

NOTE: This manual describes machinery protection system (MPS) hardware only.
Further information on condition monitoring system hardware can be found in the
VM600 condition monitoring system (CMS) hardware manual (MACMS-HW/E).

In its most basic configuration, a VM600 machinery protection system (MPS) consists of the
following hardware:
1- ABE04x (19" x 6U) or ABE056 (19" x 1U) rack

NOTE: The ABE040 and ABE042 are identical apart from the position of the rack mounting
brackets.

2- RPS6U rack power supply (ABE04x only)

When an AC-input version of the RPS6U is installed in a VM600 rack, the optional ASPS
auxiliary sensor power supply can be used to replace external power supplies such as
the APF19x 24 VDC power supplies.
3- MPC4 machinery protection card
4- IOC4T input/output card for the MPC4
5- AMC8 analog monitoring card
6- IOC8T input/output card for the AMC8.

The MPC4 and IOC4T cards form an inseparable pair and one cannot be used without the
other. These cards are used primarily to monitor vibration for the purposes of machinery
protection.
Similarly, the AMC8 and IOC8T cards form an inseparable pair. These cards are used
primarily to monitor quasi-static parameters such as temperature, fluid level or flow rate for
the purposes of machinery protection.

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INTRODUCTION
General overview

In general, a VM600 rack used for machinery protection can contain:

• Only MPC4 / IOC4T card pairs
• Only AMC8 / IOC8T card pairs
• A combination of MPC4 / IOC4T and AMC8 / IOC8T card pairs.

Depending on the application, the following type of cards can also be installed in the rack:
7- RLC16 relay card (16 relays) and IRC4 intelligent relay card (eight relays combined as
either 4 DPDT or 8 SPDT).
All the above items can be used to make a stand-alone MPS system, that is, one that is not
connected to a network.

A networked version of the MPS will in addition contain the following hardware in the ABE04x
rack:
8- CPUM modular CPU card
9- IOCN input/output card for the CPUM.

Depending on the application (and irrespective of whether the rack is used in a stand-alone
or a networked configuration), one or more of the following power supplies can be used
outside an ABE04x rack:
• APF19x 24 VDC power supplies
• Any equivalent low-noise power supply provided by the customer.
These devices must be used for GSI1xx galvanic separation units, GSV safety barriers and
transducer and signal conditioner front-ends having a current requirement greater than
25 mA. They will often be mounted in the cubicle in which the rack is installed.

NOTE: Auxiliary sensor power supplies (ASPSs) installed in an ABE04x rack perform the
same function as external power supplies such as the APF19x 24 VDC power
supplies. That is, they are used to power external hardware such as GSI galvanic
separation units or signal conditioners that require more power than can be
provided by an MPC4 / IOC4T card pair.

NOTE: Refer to the individual data sheets for full technical specifications of the MPS
hardware (see Appendix B - Data sheets).

Finally, a combined machinery protection and condition monitoring system can integrate the
following condition monitoring hardware in an ABE04x (6U) rack:
• XMx16/XIO16T extended monitoring card pairs.

NOTE: Further information on the condition monitoring system hardware can be found in
the VM600 condition monitoring system (CMS) hardware manual.

Figure 1-1 and Figure 1-2 show front and rear views of a typical VM600 (6U) rack containing
machinery protection system (MPS) hardware.

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 INTRODUCTION
General overview

IOCN
input/output card IOC4T
input/output cards IRC4
intelligent
relay card

RLC16 ASPS
relay card
ABE040
19” x 6U rack

CPUM MPC4
modular CPU machinery
card protection
card RPS6U
rack power supplies

Figure 1-1: Front-view drawing of an example MPS system in a VM600 MPS system (ABE040 rack)
featuring MPC4 / IOC4T card pairs

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INTRODUCTION
General overview

MPC4
machinery
RPS6U protection card CPUM
rack power supply modular CPU card

ABE040
19” x 6U rack

IOCN
input/output
card

IOC4T
input/output
Relay card
outputs

ASPS
Rear panel IRC4 RLC16
for rack intelligent relay card
power supply relay card

Figure 1-2: Rear-view drawing of an example MPS system in a VM600 MPS system (ABE040 rack)
featuring MPC4 / IOC4T card pairs

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 INTRODUCTION
Communicating with the VM600 MPS

1.3 Communicating with the VM600 MPS

A VM600 MPS can be configured in several ways, depending on the hardware installed in the
system rack (ABE04x). Figure 1-3 shows the various possibilities for communicating with the
system. In all cases, one of the VM600 MPS software packages (MPS1 or MPS2) is required
to perform the configuration.
In general, VM600 MPS racks can be classified as operating either with or without a CPUM
modular CPU card installed:
• A VM600 rack without a CPUM card, also known as a stand-alone rack, is a MPS system
that is not connected to a network.
In a stand-alone rack, each MPC4 and AMC8 card must be configured in turn using an
RS-232 link to a computer running one of the VM600 MPS software packages (MPS1 or
MPS2). The panels of MPC4 and AMC8 cards have a 9-pin D-sub connector for
configuring the card when used in a stand-alone rack.
• A VM600 rack containing a CPUM card (and, optionally, its associated IOCN card), also
known as a networked rack, is a MPS system that is connected to a network.
In a networked rack, the CPUM card acts as a “rack controller” and allows an Ethernet
link to be established between the rack and a computer running one of the VM600 MPS
software packages (MPS1 or MPS2).
In general, communication between the CPUM and the MPC4 and AMC8 cards takes
place via a VME bus on the VM600 rack backplane. A networked rack allows all of the
MPC4 and AMC8 cards in a rack to be configured in ‘one-shot’ using a direct Ethernet
(or RS-232) connection to a computer running one of the VM600 MPS software
packages.

NOTE: The MPC4 machinery protection card is available in different versions, including a
standard version, a separate circuits version and a safety (SIL) version
(see 4 MPC4 / IOC4T card pair).
The safety version of the MPC4 card (MPC4SIL) does not have a VME bus
interface so it cannot communicate with a CPUM or any other cards in a VM600
rack. Accordingly, the MPC4SIL card can only be configured via the RS-232
connector on its panel.

Figure 1-3 (a) shows the simplest VM600 MPS configuration. This is a stand-alone rack, that
is, one not containing a CPUM card. In this case, each MPC4 and AMC8 card in the rack must
be programmed individually from a computer using an RS-232 link. This is done via a 9-pin
D-sub connector on the panel of each of these cards.

Figure 1-3 (b) shows a networked rack containing a CPUM card. An Ethernet link can be
established between the computer and the MPS via this card. The connection is made on the
panel of the CPUM, hence at the front of the rack. Communication between the CPUM and
the MPC4 and AMC8 cards takes place via a VME bus on the VM600 rack’s backplane –
except for MPC4SIL cards as they do not have a VME bus interface and cannot communicate
with a CPUM or any other cards in a VM600 rack.

Figure 1-3 (c) shows a rack containing a CPUM card and its associated IOCN input/output
card. An Ethernet link can be established between the computer and the MPS via the IOCN.
The connection is made on the IOCN panel, hence at the rear of the rack. Communication
between the IOCN / CPUM and the MPC4 and AMC8 cards takes place via a VME bus on
the VM600 rack’s backplane – except for MPC4SIL cards as they do not have a VME bus
interface and cannot communicate with a CPUM or any other cards in a VM600 rack.

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Communicating with the VM600 MPS

NOTE: A VM600 MPS in a 19″ system rack (ABE04x) containing a CPUM card can
implement specific rack security features in order to limit the functionality of the
MPS that are available via the CPUM to Ethernet-based connections, such as the
VM600 MPSx software, the CPUM Configurator software or a Modbus TCP
connection.
See 6 CPUM / IOCN card pair and refer to the VM600 MPS1 software manual for
further information on VM600 MPS rack (CPUM) security.

NOTE: Refer to the VM600 networking manual for further information on networking
VM600 racks.

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Communicating with the VM600 MPS

Signal connections
Rear of VM600
(ABE04x) rack

RLC16
IOC4T

IOC8T

IOC4T
Backplane
(a)

RPS6U

RPS6U
MPC4

AMC8

MPC4
Front of VM600
(ABE04x) rack

Computer

RLC16
IOC4T

IOC8T

IOC4T

(b)
RPS6U

RPS6U
CPUM

MPC4

AMC8

MPC4

Ethernet

RS-232

Modbus
RLC16
IOC4T

IOC8T

IOC4T
IOCN

(c)
RPS6U

RPS6U
CPUM

MPC4

AMC8

MPC4

Figure 1-3: Methods of communicating with a VM600 MPS system

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Communicating with the VM600 MPS

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Racks

2 OVERVIEW OF VM600 MPS HARDWARE

This chapter provides a brief overview of the physical appearance of VM600 MPS hardware.
Functional information is also given for certain elements (push buttons, LEDs and so on) on
the panels.

NOTE: Further information on specific elements can be found in the corresponding

data sheets.

2.1 Racks

2.1.1 VM600 system rack – 19" rack with a height of 6U (ABE04x)

A VM600 MPS can be housed in a 19 inch rack (84TE) with a height of 6U (6HE), known as
the VM600 system rack. Two types of this rack exist: the ABE040 and the ABE042. These
are identical, except for the position of the rack mounting brackets. An example of a MPS
housed in an ABE040 rack is shown in Figure 2-1.
An ABE040 contains a front card cage and a rear card cage. The card cages are separated
by the rack backplane.
The appearance of the front panel and rear panel of the rack depends entirely on the types
of cards installed in the two card cages. These cards are presented in the following sections
of this chapter.

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Racks

Front view

(PS2) (PS1)
Rear view

Side view

Front

Figure 2-1: Views of a typical ABE040 rack with several cards installed
(machinery protection cards only)

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2.1.2 Slot number coding for cards in the rear of an ABE04x rack
Most cards installed in the rear of a standard 19" rack (ABE04x) use an electronic keying
mechanism to help ensure that the card is installed in the correct slot (for example, in the slot
directly behind the associated processing card in the front of the rack). This includes IOC4T,
IOC8T and IRC4 cards.
In ABE04x racks, each slot of the backplane has a unique, hard-wired 4-digit binary code
(see Figure 2-2) as follows:
Slot 3 Code 0011
Slot 4 Code 0100
Slot 5 Code 0101
Slot 6 Code 0110
Slot 7 Code 0111
Slot 8 Code 1000
Slot 9 Code 1001
Slot 10 Code 1010
Slot 11 Code 1011
Slot 12 Code 1100
Slot 13 Code 1101
Slot 14 Code 1110.

Cards that implement this electronic keying mechanism have a bank of micro-switches that
can be used to assign a slot number to the card (see Figure 2-2). This code is stored in the
slot number (address) assignation register on the card (IOC4T, IOC8T or IRC4).
Each card compares its slot number with the hard-wired slot number coded on the rack’s
backplane (see Figure 2-3). The result of the comparison is typically displayed on the SLOT
ERROR LED on the cards panel:
• If the codes are identical, the LED is green.
• If the codes are not identical, the LED is red.

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Racks

Card in the front of the rack Card in the rear of the rack
(for example, MPC4 or AMC8) (for example, IOC4T, IOC8T or IRC4)

Micro-switches
(Example: 1011 for slot 11)

Address Slot number

decoder (address)
assignation
register

LSB = Least-significant bit

MSB = Most-significant bit
ABE04x or ABE056

Example: Code = 1011 (for slot 11)

Figure 2-2: Electronic keying circuitry

Slot number (address)

assignation register Slot number
(configured on the card) (coded on the rack backplane)
(4 bits) (4 bits)

SLOT ERROR LED

on panel of card

Slot number
comparator
(1) A = B:
LED is green.
(2) A ≠ B:
LED is red.

Figure 2-3: Slot number comparator and SLOT ERROR LED

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Racks

2.1.3 VM600 slimline rack – 19" rack with a height of 1U (ABE056)

A VM600 MPS can be housed in a slimline 19 inch rack (84TE) with a height of 1U (1HE),
known as the VM600 slimline rack. This type of rack is an ABE056. An example of a MPS
housed in an ABE056 rack is shown in Figure 2-4.
An ABE056 contains a front card cage and a rear card cage. The card cages are separated
by the rack backplane.
The appearance of the front panel and rear panel of the rack depends entirely on the types
of cards installed in the two card cages. These cards are presented in the following sections
of this chapter.

NOTE: Both AC-input and DC-input versions of the 19” rack – 1U (ABE056) are available.
This should be specified during ordering (see 2.11 RPS1U rack power supply
(ABE056 only)).

Front view

Rear view (AC-input version)

POWER SUPPLY
POWER SUPPLY 90-264VAC
CHECK 100Wmax

Rear view (DC-input version)

POWER SUPPLY
POWER SUPPLY 18-58VDC
CHECK 60Wmax

Top view 3D view

Figure 2-4: Views of a typical ABE056 rack

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Racks

NOTE: The wiring of the DC power supply input connector, as shown in “Rear view
(DC version)” of Figure 2-4, is correct and is compatible with earlier versions of the
ABE056 rack.
The equivalent “Rear view” drawing used in some earlier versions of the VM600
MPS hardware manual was incorrect, so it appears that the DC power supply input
connector wiring has changed, but it has not.

2.1.4 Slot number coding for cards in the rear of an ABE056 rack
Most cards installed in the rear of a slimline 19" rack (ABE056) use an electronic keying
mechanism to help ensure that the card is installed in the correct slot (for example, in the slot
directly behind the associated processing card in the front of the rack). See also 2.1.2 Slot
number coding for cards in the rear of an ABE04x rack.
When a card that implement this electronic keying mechanism is to be installed in an ABE056
rack, micro-switches on the backplane of the rack must be configured to match the slot
number configured for the card (Figure 2-5). This allows a card to be used in an ABE056 rack
without reconfiguring its slot number.

Example showing the setting of micro-switches for slot 11 in an ABE056 rack

Backplane of ABE056
ON

RLC16 connector

IOC4T connector IOC4T connector

ON
Hole

Raised part
of switch 1 2 3 4 Micro-switch number LSB = Least-significant bit
(LSB) (MSB) MSB = Most-significant bit

Figure 2-5: Micro-switches to assign the slot number (ABE056)

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MPC4 machinery protection card (ABE04x and ABE056)

2.2 MPC4 machinery protection card (ABE04x and ABE056)

The MPC4 card has the following panel elements (see Figure 2-7):
1- One global DIAG/STATUS indicator for the MPC4 / IOC4T card pair
This multi-coloured, multi-function LED is used to indicate:
• The status of the card configuration
• Whether special functions such as Trip Multiply (TM) or Danger Bypass (DB) are
in use
• An MPC4 card failure due to a hardware or a software problem.
2- BNC connectors RAW OUT 1 to RAW OUT 4
A connector is present for each of the four measurement channels. Used to output raw
analog signals (corresponding to, for example, vibration or dynamic pressure).
3- BNC connectors TACHO OUT 1 and TACHO OUT 2
A connector is present for each of the two rotational speed channels. Used to output
speed/phase reference signals. These signals are TTL-conditioned.
4- Status indicators for the four measurement channels and the 2 rotational speed channels
Each multi-coloured, multi-function LED is used to indicate:
• Whether the signal input for that channel is valid
• The presence of an incoming signal in the Alert/Danger condition
• Whether the channel inhibit function is in use.
5- RS-232 connector
This 9-pin D-sub connector can be used to configure an MPC4 card in a stand-alone rack.
This is done via an interface cable from a computer running one of the VM600 MPS
software packages (MPS1 or MPS2). See Figure 2-6 for details of the interface cable.

Connect to Connect to
MPC4 card computer

Male Female
connector connector

Figure 2-6: Interface cable used to connect the MPC4 (or AMC8) card to the
serial port of a computer running the configuration software

NOTE: The MPC4 machinery protection card is available in different versions, including a
standard version, a separate circuits version and a safety (SIL) version.
See 4 MPC4 / IOC4T card pair for additional information.

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MPC4 machinery protection card (ABE04x and ABE056)

DIAG/STATUS indicator for the MPC4 / IOC4T card pair.

The colours of the LED have the following significance:
* Green (continuous) – Normal operation (configuration valid with no active
alarms and no errors).
* Green blinking – Configuration is being downloaded (stabilisation phase)
and/or signal processing error.
BNC connector for the * Yellow (continuous) – Trip Multiply (TM) function active.
MPC4 / IOC4T card pair * Yellow blinking – Configuration error and/or signal processing error.
measurement channel 1. * Red (continuous) – Danger Bypass (DB) function active.
Raw signal output. * Red blinking – Hardware or input error.
Transfer function:
Voltage input: 1V/V Status indicator for the MPC4 / IOC4T card pair measurement channel 1.
Current input: 0.3245 V/mA. The colours of the LED have the following significance:
* Off – Channel not configured (“Sensor Connected” set to “No” in
the VM600 MPSx software) or card not configured.
* Green (continuous) – Signal input to the channel is valid and there are
no active alarms.
* Green blinking – Signal input to the channel is not valid.
* Green blinking slowly – Channel inhibit function active.
* Yellow (continuous) – There is an active single-channel processing
Status indicator and BNC Alert level alarm ((A−) or (A+)).
connector for the * Yellow blinking – There is an active dual-channel processing
MPC4 / IOC4T card pair Alert level alarm ((A−) or (A+)). Note: The status indicator LED for both
measurement channels 2, 3 channels will blink yellow at the same time.
and 4. * Red (continuous) – There is an active single-channel processing
Operation as per Danger level alarm ((D−) or (D+)).
measurement channel 1. * Red blinking – There is an active dual-channel processing
Danger level alarm ((D−) or (D+)). Note: The status indicator LED for both
channels will blink red at the same time.

Status indicator for the MPC4 / IOC4T card pair rotational speed channel 1
BNC connector for the (TACHO 1).
MPC4 / IOC4T card pair The colours of the LED have the following significance:
rotational speed channel 1 * Off – Channel not configured (“Sensor Connected” set to “No” in.
(TACHO 1). the VM600 MPSx software)
Raw signal output (TTL * Green (continuous) – Signal input to the channel is valid and there are
compatible). no active alarms.
* Green blinking – Signal input to the channel is not valid.
* Green blinking slowly – Channel inhibit function active.
RS-232 connector. * Yellow (continuous) – There is an active single-channel processing
Can be used to configure an Alert level alarm ((A−) or (A+)).
MPC4 card in a stand-alone
rack (without CPUM card) Status indicator and BNC connector for the MPC4 / IOC4T card pair rotational
using the VM600 MPSx speed channel 2 (TACHO 2).
software. Operation as per speed channel 1 (TACHO 1).
Note: The safety version of
the MPC4 card (MPC4SIL)
Notes:
does not have a VME bus
See also Table 4-1, Table 4-2 and Table 4-3 for further information
interface so it can only be
on the behaviour of MPC4 card LEDs.
configured via this serial link
(even in a networked VM600
rack).

Figure 2-7: Elements on the MPC4

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IOC4T input/output card (ABE04x and ABE056)

2.3 IOC4T input/output card (ABE04x and ABE056)

The IOC4T panel (rear of rack) contains three terminal strips, identified as J1, J2 and J3 (see
Figure 2-8). Each strip consists of a socket and a mating connector, which contains 16 screw
terminals. The screw terminals can accept wires with a cross section of ≤1.5 mm2.
Figure 2-8 (a) shows the appearance of the IOC4T panel without the three mating
connectors. In this configuration, the engraving showing the terminal definitions is clearly
seen. Figure 2-8 (b) shows the appearance of the panel when the 3 mating connectors are
inserted.

Connector J1

Connector J2

Connector J3

SLOT ERROR indicator

The colour of this LED indicates whether the
IOC4T is installed in the correct slot of the
rack:
Green – The card is in the correct slot
Red – Slot number mismatch.
(a) (b)

Figure 2-8: IOC4T panel (rear of ABE04x and ABE056 racks)

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AMC8 analog monitoring card (ABE04x and ABE056)

2.4 AMC8 analog monitoring card (ABE04x and ABE056)

The AMC8 card has the following panel elements (see Figure 2-9):
1- One global DIAG/STATUS indicator for the AMC8 / IOC8T card pair
This multi-coloured, multi-function LED is used to indicate:
• The status of the card configuration
• Possible hardware errors
• Whether the Danger Bypass (DB) special function is in use.
2- Status indicators for the 8 measurement channels
Each multi-coloured, multi-function LED is used to indicate:
• Whether the signal input for that channel is valid
• The presence of an incoming signal in the Alert/Danger condition
• Whether the channel inhibit function is in use.
3- RS-232 connector
This 9-pin D-sub connector can be used to configure an AMC8 card in a stand-alone rack.
This is done via an interface cable from a computer running one of the VM600 MPS
software packages (MPS1 or MPS2). See Figure 2-6 for details of the interface cable.

2.5 IOC8T input/output card (ABE04x and ABE056)

The IOC8T panel (rear of rack) contains four contact strips, identified as J1 to J4.
Strips J1 to J3 consist of a socket and a mating connector, which contains either 24 or 20
cage clamp terminals (see Figure 2-8). The terminals can accept wires with a cross section
of between 0.08 and 1.0 mm2.
Strip J4 consists of a socket and a mating connector, which contains 12 screw terminals. The
terminals can accept wires with a cross section of ≤1.5 mm2.

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IOC8T input/output card (ABE04x and ABE056)

DIAG/STATUS indicator for the AMC8 / IOC8T card pair.

VM600 The colours of the LED have the following significance:
* Green (continuous) – Normal operation (configuration valid with no active
alarms and no errors).
* Green blinking – Card is configured but still in the stabilisation phase.
* Yellow (continuous) – There is an active multi-channel processing
Alert level alarm ((A−) or (A+)).
* Yellow blinking – Configuration error and/or signal processing error.
* Red (continuous) – There is an active multi-channel processing
Danger level alarm ((D−) or (D+)).
* Red blinking – Hardware error or card not yet configured.

Status indicator for the AMC8 / IOC8T card pair measurement channel 1.
The colours of the LED have the following significance:
* Off – Channel not configured or card not configured.
* Green (continuous) – Signal input to the channel is valid and there are
no active alarms.
* Green blinking – Signal input to the channel is not valid.
* Green blinking slowly – Channel inhibit function active.
* Yellow (continuous) – There is an active single-channel processing
Status indicator for Alert level alarm ((A−) or (A+)).
the AMC8 / IOC8T * Red (continuous) – There is an active single-channel processing
card pair Danger level alarm ((D−) or (D+)).
measurement
channels 2 to 8.
Operation as per
measurement
channel 1.

RS-232 connector
Can be used to configure an AMC8 card in a stand-alone rack
(without CPUM card) using the VM600 MPSx software.

Notes:
See also Table 5-1 and Table 5-2 for further information
on the behaviour of AMC8 card LEDs.

Figure 2-9: Elements on the AMC8

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CPUM modular CPU card (ABE04x only)

Connector J1
(mating connector with 24
cage clamp terminals)

Connector J2
(mating connector with 24
cage clamp terminals)

Connector J3
(mating connector with 20
cage clamp terminals)

Connector J4
(mating connector with
12 screw terminals)
SLOT ERROR indicator
The colour of this LED indicates whether the
IOC8T is installed in the correct slot of the
rack:
Green – The card is in the correct slot
Red – Slot number mismatch.

Figure 2-10: IOC8T panel (rear of ABE04x and ABE056 racks)

2.6 CPUM modular CPU card (ABE04x only)

See Figure 2-11 for details on the physical appearance of this card.

2.7 IOCN input/output card (ABE04x only)

See Figure 2-12 for details on the physical appearance of this card.

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IOCN input/output card (ABE04x only)

Output signal
Slot (module number)
(for example,
Channel 1,
Output 1)

Danger threshold
Enlarged view of display

Alert threshold

Bargraph
(51 segments)

Digital display

Measurement
unit
Green diagnostic LED:
Rectifier
* Off – CPUM is off or
function
starting
* Green – Normal operation
Potentiometer to adjust
(CPUM running correctly)
display contrast
and access to the CPUM
card is allowed
* Green blinking slowly –
Normal operation
(CPUM running correctly)
Status LEDs:
and access to the CPUM
OK line check (green)
card is restricted
Alert (yellow)
* Green blinking quickly for
Danger (red),
five seconds – CPUM is
These three LEDs indicate the status of either:
resetting to its default
the displayed slot/output or
VM600 MPS rack
the entire rack (when slot = 0).
(CPUM) security settings.
See Table 6-1.
Keys to select the signal to be displayed.
Use SLOT− and SLOT+ to select the slot (module) and
OUT− and OUT+ to run through the available signals.
These keys are also used to help configure the
VM600 MPS rack (CPUM) security settings.

Push-button to reset all latched alarms (and associated

relays) for MPC4 and AMC8 cards in the rack
‘NET’ connector
(8P8C (RJ45)) for primary
Ethernet connection, ‘RS232’ connector (D-sub (DE-09)) for primary serial
used for VM600 rack connection, used for VM600 rack configuration and
configuration and communications
communications,
and Modbus TCP
communications

Figure 2-11: Elements on the CPUM

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IOCN input/output card (ABE04x only)

‘RS’ connector (6P6C (RJ11/RJ25)) for secondary serial

connection, used for Modbus RTU communications.
Supports RS-232 or RS-485 (2-wire or 4-wire) communications
(selectable by jumpers on the CPUM card).

‘A’ serial connectors (6P6C (RJ11/RJ25))

used for Modbus RTU communications – Group A.
Supports RS-485 (2-wire or 4-wire) communications.
Note: If no optional serial communications module is Note: The optional serial
fitted to the CPUM card, jumpers J20 to J24 on the IOCN communications module must be
card can be set to link these two connectors to the fitted to the CPUM card in order to
‘RS’ connector described above. use the additional ‘A’ and ‘B’ serial
connections.
(One module supports all four
connectors.)
‘B’ serial connectors (6P6C (RJ11/RJ25))
used for Modbus RTU communications – Group B.
Supports RS-485 (2-wire or 4-wire) communications.

‘1’ Ethernet connector (8P8C (RJ45)) for primary Ethernet

connection, used for VM600 rack configuration and
communications, and Modbus TCP communications.
Note: The primary Ethernet connection can be routed to
either the ‘NET’ connector (CPUM card) or the ‘1’
connector (IOCN card).

‘2’ Ethernet connector (8P8C (RJ45)) for secondary

Ethernet connection, used for redundant Modbus TCP
communications.

Figure 2-12: Elements on the IOCN

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RLC16 relay card (ABE04x and ABE056)

2.8 RLC16 relay card (ABE04x and ABE056)

The RLC16 panel (rear of rack) contains three terminal strips, identified as J1, J2 and J3 (see
Figure 2-13). Each strip consists of a socket and a mating connector, which contains 16
screw terminals. The screw terminals can accept wires with a cross section of ≤1.5 mm2.
Figure 2-13 (a) shows the appearance of the RLC16 panel without the three mating
connectors. In this configuration, the engraving showing the terminal definitions is clearly
seen. Figure 2-13 (b) shows the appearance of the panel when the three mating connectors
are inserted.

Connector J1

Connector J2

Connector J3

(a) (b)

Figure 2-13: RLC16 panel (rear of ABE04x and ABE056 racks)

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IRC4 intelligent relay card (ABE04x and ABE056)

2.9 IRC4 intelligent relay card (ABE04x and ABE056)

The IRC4 panel (rear of rack) contains two terminal strips, identified as J1 and J2 (see
Figure 2-14). Each strip consists of a socket and a mating connector, which contains 16
screw terminals. The screw terminals can accept wires with a cross section of ≤1.5 mm2.
Figure 2-14 (a) shows the appearance of the IRC4 panel without the 2 mating connectors. In
this configuration, the engraving showing the terminal definitions is clearly seen.
Figure 2-14 (b) shows the appearance of the panel when the 2 mating connectors are
inserted.

RLY1 RLY1

Status indicator for relay 1. RLY2 RLY2

The colours of the LED have the
following significance: RLY3 RLY3
Connector J1
* Green – Result of the relay’s logic
RLY4 RLY4
equation is false
* Red – Result of the relay’s logic DB DB
equation is true
* Yellow blinking – Relay error.

Operation of status indicators for RLY5 RLY5

relay 2 to relay 8 are as for relay 1.
RLY6 RLY6

RLY7 RLY7

Connector J2
RLY8 RLY8

DIAG indicator.
The colours of the LED have the following
significance:
* Green – The card is in the correct slot RS-232 connector for
* Red – Slot number mismatch or HW local configuration
error.
(Same function as the SLOT ERROR LED
on other cards.) (Not used)

IRC 4 IRC 4

(a) (b)

Figure 2-14: IRC4 panel (rear of ABE04x and ABE056 racks)

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RPS6U rack power supply (ABE04x only)

2.10RPS6U rack power supply (ABE04x only)

2.10.1 Different versions of the RPS6U rack power supply

In 2016, the RPS6U rack power supply was improved to provide a higher output power of
330 W with higher-performance and higher-efficiency, which required a redesign of the
underlying power supply circuitry.
The different versions of the RPS6U rack power supply in use are:
• Later versions of the RPS6U (PNR 200-582-x00-02h or later) that define the power as a
total maximum output power of 330 W, with nominal output (supply) voltages of
+5 VDC up to 50 A, +12 VDC up to 8 A and −12 VDC up to 4 A.

NOTE: The total maximum output power of 330 W is a combination load for all outputs
as the +5 VDC and ±12 VDC outputs are usually not simultaneously loaded to
the maximum in practice.
For example, if the +5 VDC output is at its maximum rated load (5.35 V × 50 A
= 267.5 W), then the combined loads on the +12 VDC and −12 VDC outputs
must not exceed 62.5 W.

• Earlier versions of the RPS6U (PNR 200-582-x00-01h or earlier) that define the power
as a rated power of 300 W, with nominal output (supply) voltages of
+5 VDC up to 35 A, +12 VDC up to 6 A and −12 VDC up to 2 A.

THE LATER VERSIONS OF THE RPS6U RACK POWER SUPPLY (330 W) CAN PROVIDE
SIGNIFICANTLY MORE CURRENT COMPARED TO THE EARLIER VERSIONS OF THE
RPS6U RACK POWER SUPPLY (300 W), NOTABLY ON THE +5 VDC OUTPUT WHICH
CAN BE UP TO 50 A (COMPARED TO THE PREVIOUS MAXIMUM OF 35 A).

ACCORDINGLY, LATER VERSIONS OF THE RPS6U POWER SUPPLY (330 W,

PNR 200-582-X00-02h OR LATER) SHOULD BE USED ONLY WITH LATER VERSIONS OF
THE VM600 SYSTEM RACK (ABE040 PNR 204-040-100-015 OR LATER, ABE042
PNR 204-042-100-015 OR LATER), AS THESE RACKS HAVE BEEN IMPROVED IN
ORDER TO SUPPORT THE HIGHER CURRENTS AVAILABLE FROM A 330 W RPS6U
POWER SUPPLY.

FOR REASONS OF OBSOLESCENCE, EARLIER VERSIONS OF THE RPS6U POWER

SUPPLY (300 W, PNR 200-582-X00-01h OR EARLIER) IN EARLIER VERSIONS OF THE
VM600 SYSTEM RACK (ABE040 PNR 204-040-100-014 OR EARLIER, ABE042
PNR 204-042-100-014 OR EARLIER) CAN BE REPLACED WITH LATER VERSIONS OF
THE RPS6U POWER SUPPLY (330 W, PNR 200-582-X00-02h OR LATER) WHEN IT IS
ENSURED THAT THE LOAD (CURRENT DRAW) ON THE REPLACEMENT RPS6U POWER
SUPPLY DOES NOT INCREASE. FOR EXAMPLE, THIS CAN BE ENSURED BY NOT ADDING
ANY ADDITIONAL CARDS TO THE RACK AND BY NOT CHANGING THE CONFIGURATION
OF THE RACK.

SEE 8.3.2 CIRCUIT BREAKER AND 8.3.3 SUPPLY WIRING FOR FURTHER INFORMATION.

The improved RPS6U rack power supply (330 W) can supply a full rack of cards, such as
12 x MPC4/IOC4T card pairs or 12 x XMx16/XIO16T card pairs. This means that a VM600
rack with two RPS6U power supplies (330 W) installed and operating non-redundantly is
usually only necessary for applications where the operating environment requires RPS6U
output power derating. (A VM600 rack with two RPS6U power supplies (330 W) installed and
operating redundantly is necessary for applications requiring rack power supply redundancy.)

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In practice, this means that a single RPS6U rack power supply can now supply power to a
VM600 rack full of machinery protection and/or condition monitoring cards under normal
operating conditions. Although, with 12 x processing cards in a VM600 rack, forced-air
cooling is highly recommended.
For an existing VM600 system, it is important to note that simply replacing an old RPS6U rack
power supply (300 W) with a new one (330 W) should not be used as a way to increase the
maximum output power available in order to add more cards to the rack – because the rack
backplane may not support the additional currents involved. If you are considering this,
please contact your Meggitt representative, who will help you to assess how many cards can
be safely added to your system without replacing the rack.
For an existing VM600 system with rack power supply redundancy, it is possible to replace
only one RPS6U rack power supply so that the old (300 W) and new (330 W) versions of the
RPS6U operate together, although it is recommended to replace both in such a case.

2.10.2 Identifying different versions of the RPS6U rack power supply

The different versions of the RPS6U rack power can be visually identified from their panels,
as an LED text label is different.
• For both the AC-input and DC-input versions of the higher-power RPS6U rack power
supply (PNR 200-582-x00-02h or later) that provides 330 W, the text label of the LED
(top) used to indicate the status of the external mains supply is labelled “IN”, as shown
in Figure 2-15 (a).
• For the AC-input version of the original RPS6U rack power supply (PNR
200-582-x00-01h or earlier) that provides 300 W, the text label of the LED (top) used to
indicate the status of the external mains supply is labelled “AC”, as shown in
Figure 2-15 (b).
For the DC-input versions of the original RPS6U rack power supply (PNR
200-582-x00-01h or earlier) that provide 300 W, the text label of the LED (top) used to
indicate the status of the external mains supply is labelled “DC”, as shown in
Figure 2-15 (b).

2.10.3 General overview

The following versions of higher-power RPS6U rack power supply are available:
• RPS6U power supply for use with an external AC-mains supply.
• RPS6U power supplies for use with different external DC-mains supplies.
The different versions are distinguished by their ordering number (refer to the RPS6U rack
power supply data sheet).
The RPS6U rack power supply must be used with an appropriate connection panel mounted
at the rear of the VM600 rack. Several types of these associated rear panels exist
(see 2.10.9 Associated rear panels and refer to the RPS6U rack power supply data sheet) in
order to allow the connection of external AC-mains and/or DC-mains power to the rack.
See also 8.3 Rack safety requirements.

HAZARDOUS VOLTAGES EXIST WITHIN VM600 SYSTEM RACKS (ABE04X).

WHEN AN RPS6U RACK POWER SUPPLY, ASSOCIATED REAR PANEL OR CARD IS
REMOVED FROM A VM600 SYSTEM RACK (ABE04X), THE RACK BACKPLANE –
CONTAINING HAZARDOUS VOLTAGES – IS EXPOSED AND THERE IS THE RISK OF
ELECTRIC SHOCK.

SEE ALSO HAZARDOUS VOLTAGES AND THE RISK OF ELECTRIC SHOCK ON PAGE XV.

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One or two RPS6U power supplies can be installed in an ABE04x rack, as shown in
Figure 2-1. When two RPS6Us are installed in a rack, the RPS6U on the right (slots 18 to 20)
is power supply 1 (PS1) and the RPS6U on the left (slots 15 to 17) is power supply 2 (PS2).
A rack can have two RPS6U power supplies installed for different reasons:
• In order to support rack power supply redundancy
See 2.10.5 Racks with two RPS6U rack power supplies in order to support rack power
supply redundancy.
• In order to supply power to the cards (non-redundantly)
See 2.10.6 Racks with two RPS6U rack power supplies in order to supply power to
the cards.

NOTE: A VM600 rack configuration with two RPS6U power supplies (330 W) operating
non-redundantly to supply power to the cards is typically only necessary for a full
rack of cards in an application where the operating environment requires RPS6U
output power derating.

The number and type of RPS6U power supplies installed in a VM600 rack, together with the
number of cards installed and the environmental conditions, helps determine the mode of
operation of the RPS6U power supplies as either redundant or non-redundant.

NOTE: To verify that a VM600 rack containing two RPS6U rack power supplies is a
non-redundant or a redundant rack power supply configuration, contact Meggitt
Sensing Systems.

2.10.4 RPS6U rack power supply and VM600 card considerations

The maximum number of cards that can be installed in a VM600 system rack (ABE04x)
depends on RPS6U rack power supply considerations:
• The number of RPS6U supplies installed in the rack: one or two.
• The power capability of the RPS6U supplies installed in the rack: 330 or 300 W.
• When two RPS6U supplies are installed in the rack, the mode of operation of the RPS6U
supplies: redundant or non-redundant.
• The operating temperature of the environment where the VM600 rack is installed:
RPS6U power supplies require either output power derating and/or forced-air cooling for
operating temperatures of 50°C (122°F) or higher.
The maximum number of cards that can be installed in a VM600 system rack (ABE04x) also
depends on individual VM600 card considerations, for example, the configuration of sensor
power supplies and DC outputs for MPC4 / IOC4T card pairs. In general:
• A VM600 system rack with one RPS6U power supply (330 W) operates non-redundantly
(that is, without rack power supply redundancy and supports a full rack of cards,
for example, up to 12x MPC4/IOC4T or 12 x XMx16/XIO16T card pairs or any other
combination of cards, for operating temperatures up to 50°C (122°F).
• A VM600 system rack with two RPS6U power supplies (330 W) operating
redundantly (that is, with rack power supply redundancy) supports a full rack of cards,
for example, up to 12x MPC4/IOC4T or 12 x XMx16/XIO16T card pairs or any other
combination of cards, for operating temperatures up to 50°C (122°F).
When two RPS6U rack power supplies operate redundantly to supply power to the cards
in a VM600 rack, the maximum current available for use by the cards is limited to the
current available from a single RPS6U power supply.
• A VM600 system rack with two RPS6U power supplies (330 W) operating
non-redundantly (that is, without rack power supply redundancy) supports any

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RPS6U rack power supply (ABE04x only)

combination of cards under all circumstances, including operating temperatures up to

70°C (158°F).
When two RPS6U rack power supplies operate non-redundantly to supply power to the
cards in a VM600 rack, the maximum current available for use by the cards is limited to
approximately 125% (x 1.25) the current available from a single RPS6U power supply.

NOTE: A VM600 rack configuration with two RPS6U power supplies (330 W)
operating non-redundantly to supply power to the cards is typically only
necessary for a full rack of cards in an application where the operating
environment requires RPS6U output power derating.

For a VM600 rack configuration that contains more than ten processing cards (MPC4/IOC4T,
AMC8/IOC8T and/or XMx16/XIO16T) together with a CPUM/IOCN “rack controller” and/or
RLC16 relay cards, the power consumption of the rack should be calculated in order to
determine the number of RPS6U power supplies required and the permitted modes of
operation. Contact Meggitt Sensing Systems for further information.

2.10.5 Racks with two RPS6U rack power supplies in order to support rack power
supply redundancy
A VM600 rack with two RPS6U power supplies installed can operate redundantly (with rack
power supply redundancy) for a full rack of cards. This means that if one RPS6U fails, the
other will provide 100% of the power requirement and the rack will continue to operate,
thereby increasing the availability of the machinery monitoring system.

NOTE: This is known as a redundant RPS6U rack power supply configuration.

When two RPS6U rack power supplies operate redundantly to supply power to the cards in
a VM600 rack, the maximum current available for use by the cards is limited to the current
available from a single RPS6U power supply.
During the normal operation of a rack with two RPS6U power supplies installed, each supply
typically provides 50% of the power requirement. In practice, the current load share can be
anywhere between 20 to 80% (and 80 to 20%) due to imbalances. This is the case for all
VM600 racks with two RPS6U rack power supplies installed, whether “redundant” or not.
However, if one power supply fails on a redundant rack, the other will provide 100% of the
power requirement and the rack will continue to operate, thereby increasing the availability of
the machinery monitoring system.

2.10.6 Racks with two RPS6U rack power supplies in order to supply power to
the cards
A VM600 rack with two RPS6U power supplies installed can operate non-redundantly
(without rack power supply redundancy). Typically, this is only necessary for a full rack of
cards in applications where the operating environment requires RPS6U output power
derating.

NOTE: Even though two RPS6U rack power supplies are installed in the rack, this is not a
redundant rack power supply configuration.

When two RPS6U rack power supplies are used to supply power to the cards in a VM600
rack, the maximum current available for use by the cards is limited to approximately 125%

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(x 1.25) the current available from a single RPS6U because of the way in which the power
supplies share the load. In practice, the current load share can be anywhere between 20 to
80% (and 80 to 20%) due to imbalances.
The later versions of the RPS6U power supply (330 W) can support a full rack of cards, for
example, 12 x MPC4/IOC4T or 12 x XMx16/XIO16T card pairs can be supported by one
330 W RPS6U for operating temperatures up to 50°C (122°F). This means that a VM600
rack with two 330 W RPS6U power supplies installed and operating non-redundantly is only
typically only necessary for applications where the operating environment requires RPS6U
output power derating.
The earlier versions of the RPS6U power supply (300 W) cannot support a full rack of cards,
for example, 9 x MPC4/IOC4T or 6 x XMx16/XIO16T card pairs can be supported by one
300 W RPS6U for operating temperatures up to 60°C (140°F). This means that a VM600
rack with two 300 W RPS6U power supplies installed and operating non-redundantly is
typically necessary for applications using more than nine cards. Contact Meggitt Sensing
Systems for further information

2.10.7 Racks supporting external mains power-supply system redundancy

It is important to note the difference between RPS6U power supply redundancy and external
mains power-supply system redundancy:
• RPS6U rack power supply redundancy requires that two RPS6U power supplies are
installed in the VM600 rack, so that should one power supply fail, then the other power
supply can continue to supply power the cards in the rack.
For information on the associated rear panels that can be used by a VM600 rack with or
without rack power supply redundancy, see 2.10.9.1, 2.10.9.2, 2.10.9.3, 2.10.9.5,
2.10.9.6, 2.10.9.7, 2.10.9.8, 2.10.9.9, 2.10.9.10 and 2.10.9.13.
• External mains power-supply system redundancy requires that two external mains
supplies (AC or DC) are used to supply power to the VM600 rack (which can have one
or two RPS6U power supplies installed). Should one of the external mains supplies fail,
then the other external mains supply can continue to supply power to the cards in the
rack.
For information on the associated rear panels that are required by a VM600 rack for
external mains power-supply system redundancy, see 2.10.9.4, 2.10.9.11 and 2.10.9.12.

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RPS6U rack power supply (ABE04x only)

2.10.8 Front panels

Figure 2-15 shows the panels of RPS6U rack power supplies with different inputs: AC or DC.

IN, AC or DC LED:
Green indicates that the
external mains supply is
present and is within the
normal range.
This LED is on when
the RPS6U is operating
normally.

+5V, +12V and −12V LEDs:

Yellow indicates that the
corresponding internal
supply voltage is being
generated and is within the
normal range.
These LEDs are on when
the RPS6U is operating
normally.

(AC-input version) (DC-input version)

(a) Panel of later (higher-power) (b) Panels of earlier (original)

version of the RPS6U rack version of the RPS6U rack power supply:
power supply AC-input version (left) and
DC-input version (right)

Figure 2-15: Front panels for the different versions of the RPS6U rack power supply

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2.10.9 Associated rear panels

2.10.9.1 DC-input panel with a common input

NOTE: For a VM600 system rack (ABE04x) operating with an external DC-mains supply,
the DC-input panel with a common input is the standard associated rear panel.

This rear panel has one DC input with a screw-terminal connector that provides a common
input to DC-input versions of the RPS6U power supplies in a VM600 rack.
Figure 2-16 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-920-NHh
(equivalent VM600SYS order option code: F200).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the DC-input versions of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this DC-input panel is intended for use with one
DC-mains supply, that is, a non-redundant external power-supply system.

vibro meter

DATA
MATRIX
2D

DC input label

(Rear panel (Internal to

connections) VM600 rack)

(a) Rear panel (b) Wiring details

Figure 2-16: DC-input panel with a common input

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RPS6U rack power supply (ABE04x only)

2.10.9.2 DC-input panel with a common input (special earth terminal)

This rear panel has one DC input with a screw-terminal connector that provides a common
input to DC-input versions of the RPS6U power supplies in a VM600 rack. It also provides a
special earth terminal (identified as M.A.L.T.).
Figure 2-17 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-922-NHh
(equivalent VM600SYS order option code: F220).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the DC-input versions of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this DC-input panel is intended for use with one
DC-mains supply, that is, a non-redundant external power-supply system.

vibro meter

DATA
MATRIX
2D

DC input label

(Rear panel (Internal to

connections) VM600 rack)

(a) Rear panel (b) Wiring details

Figure 2-17: DC-input panel with a common input

(special earth terminal)

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2.10.9.3 DC-input panel with individual inputs

This rear panel has two DC inputs with screw-terminal connectors that provide individual
inputs to DC-input versions of the RPS6U power supplies in a VM600 rack.
Figure 2-18 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-993-NHh
(equivalent VM600SYS order option code: F930).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the DC-input versions of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this DC-input panel is intended for use with two
DC-mains supplies, that is, a non-redundant external power-supply system.

vibro meter

DATA
MATRIX
2D

DC input label

DC input label

(Rear panel (Internal to

connections) VM600 rack)

(a) Rear panel (b) Wiring details

Figure 2-18: DC-input panel with individual inputs

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RPS6U rack power supply (ABE04x only)

2.10.9.4 DC-input panel with individual inputs supporting external mains power supply
redundancy
This rear panel has two DC inputs with screw-terminal connectors that provide a common
input to DC-input versions of the RPS6U power supplies in a VM600 rack.
Figure 2-19 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-990-NHh
(equivalent VM600SYS order option code: F900).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the DC-input versions of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this DC-input panel is intended for use with two
DC-mains supplies arranged as a redundant external power-supply system
(see 2.10.7 Racks supporting external mains power-supply system redundancy).

vibro meter

DATA
MATRIX
2D

DC input label

(Rear panel (Internal to

connections) VM600 rack)

(a) Rear panel (b) Wiring details

Figure 2-19: DC-input panel with individual inputs

supporting external mains power supply redundancy

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2.10.9.5 AC-input (120/230 VAC) panel with a common input (mains socket and on/off switch)

NOTE: For a VM600 system rack (ABE04x) operating with an external AC-mains supply,
the AC-input panel with a common input is the standard associated rear panel.

This rear panel has one AC input (120/230 VAC) with mains socket and on/off switch that
provides a common input to the AC-input version of the RPS6U power supplies in a VM600
rack.
Figure 2-20 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-910-NHh
(equivalent VM600SYS order option code: F100).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the AC-input version of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this AC-input panel is intended for use with one
AC-mains (120/230 VAC) supply, that is, a non-redundant external power-supply system.

vibro meter

DATA
MATRIX
2D

(Rear panel (Internal to

connections) VM600 rack)

(a) Rear panel (b) Wiring details

Figure 2-20: AC-input (120/230 VAC) panel with a common input

(mains socket and on/off switch)

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RPS6U rack power supply (ABE04x only)

2.10.9.6 AC-input (120/230 VAC) panel with a common input (screw-terminal connector and
on/off switch)
This rear panel has one AC input (120/230 VAC) with screw-terminal connector, on/off switch
and rear-panel fuses that provides a common input to the AC-input version of the RPS6U
power supplies in a VM600 rack.
Figure 2-21 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-911-NHh
(equivalent VM600SYS order option code: F110).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the AC-input version of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this AC-input panel is intended for use with one
AC-mains (120/230 VAC) supply, that is, a non-redundant external power-supply system.

vibro meter

DATA
MATRIX
2D

(Rear panel (Internal to

connections) VM600 rack)

(a) Rear panel (b) Wiring details

Figure 2-21: AC-input (120/230 VAC) panel with a common input

(screw-terminal connector and on/off switch)

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2.10.9.7 AC-input (120/230 VAC) panel with a common input (screw-terminal connector)

This rear panel has one AC input (120/230 VAC) with screw-terminal connector and
rear-panel fuses that provides a common input to the AC-input version of the RPS6U power
supplies in a VM600 rack.
Figure 2-22 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-912-NHh
(equivalent VM600SYS order option code: F120).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the AC-input version of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this AC-input panel is intended for use with one
AC-mains (120/230 VAC) supply, that is, a non-redundant external power-supply system.

vibro meter

DATA
MATRIX
2D

(Rear panel (Internal to

connections) VM600 rack)

(a) Rear panel (b) Wiring details

Figure 2-22: AC-input (120/230 VAC) panel with a common input

(screw-terminal connector)

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RPS6U rack power supply (ABE04x only)

2.10.9.8 AC-input (120/230 VAC) panel with individual inputs (mains sockets and on/off
switches)
This rear panel has two AC inputs (120/230 VAC) with mains sockets and on/off switches that
provide individual inputs to the AC-input version of the RPS6U power supplies in a VM600
rack.
Figure 2-23 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-963-NHh
(equivalent VM600SYS order option code: F630).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the AC-input version of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this AC-input panel is intended for use with two
AC-mains (120/230 VAC) supplies, that is, a non-redundant external power-supply system.

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vibro meter

DATA
MATRIX
2D

(a) Rear panel

(Rear panel (Internal to

connections) VM600 rack)

(b) Wiring details

Figure 2-23: AC-input (120/230 VAC) panel with individual inputs

(mains sockets and on/off switches)

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RPS6U rack power supply (ABE04x only)

2.10.9.9 AC-input (120/230 VAC) panel with individual inputs (screw-terminal connectors and
on/off switches)
This rear panel has two AC inputs (120/230 VAC) with screw-terminal connectors, on/off
switches and rear-panel fuses that provide individual inputs to the AC-input version of the
RPS6U power supplies in a VM600 rack.
Figure 2-24 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-915-NHh
(equivalent VM600SYS order option code: F150).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the AC-input version of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this AC-input panel is intended for use with two
AC-mains (120/230 VAC) supplies, that is, a non-redundant external power-supply system.

vibro meter

DATA
MATRIX
2D

(Rear panel (Internal to

connections) VM600 rack)

(a) Rear panel (b) Wiring details

Figure 2-24: AC-input (120/230 VAC) panel with individual inputs

(screw-terminal connectors and on/off switches)

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 OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

2.10.9.10 AC-input (120/230 VAC) panel with individual inputs (screw-terminal connectors)

This rear panel has two AC inputs (120/230 VAC) with screw-terminal connectors and
rear-panel fuses that provide individual inputs to the AC-input version of the RPS6U power
supplies in a VM600 rack.
Figure 2-25 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-916-NHh
(equivalent VM600SYS order option code: F160).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the AC-input version of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this AC-input panel is intended for use with two
AC-mains (120/230 VAC) supplies, that is, a non-redundant external power-supply system.

vibro meter

DATA
MATRIX
2D

(Rear panel (Internal to

connections) VM600 rack)

(a) Rear panel (b) Wiring details

Figure 2-25: AC-input (120/230 VAC) panel with individual inputs

(screw-terminal connectors)

VM600 MPS hardware manual (standard version) MAMPS-HW/E 2 - 33

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OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

2.10.9.11 AC-input (120 VAC only) panel with individual inputs supporting external mains power
supply redundancy
This rear panel has two AC inputs (120 VAC only) with mains sockets and on/off switches that
provide a common input to the AC-input version of the RPS6U power supplies in a VM600
rack.
Figure 2-26 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-962-NHh
(equivalent VM600SYS order option code: F620).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the DC-input versions of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this AC-input panel is intended for use with two
AC-mains (120 VAC only) supplies arranged as a redundant external power-supply system
(see 2.10.7 Racks supporting external mains power-supply system redundancy).

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 OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

vibro meter

DATA
MATRIX
2D

(a) Rear panel

(Rear panel (Internal to

connections) VM600 rack)

(b) Wiring details

Figure 2-26: AC-input (120 VAC only) panel with individual inputs
supporting external mains power supply redundancy

VM600 MPS hardware manual (standard version) MAMPS-HW/E 2 - 35

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OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

2.10.9.12 AC-input (230 VAC only) panel with individual inputs supporting external mains power
supply redundancy
This rear panel has two AC inputs (230 VAC only) with mains sockets and on/off switches that
provide a common input to the AC-input version of the RPS6U power supplies in a VM600
rack.
Figure 2-27 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-960-NHh
(equivalent VM600SYS order option code: F600).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the DC-input versions of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this AC-input panel is intended for use with two
AC-mains (230 VAC only) supplies arranged as a redundant external power-supply system
(see 2.10.7 Racks supporting external mains power-supply system redundancy).

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 OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

vibro meter

DATA
MATRIX
2D

(a) Rear panel

(Rear panel (Internal to

connections) VM600 rack)

(b) Wiring details

Figure 2-27: AC-input (230 VAC only) panel with individual inputs
supporting external mains power supply redundancy

VM600 MPS hardware manual (standard version) MAMPS-HW/E 2 - 37

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OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

2.10.9.13 Combined AC-input (120/230 VAC) and DC-input panel with individual inputs

This rear panel has one AC input (120/230 VAC) with mains socket and on/off switch and one
DC input with screw-terminal connector that provide individual inputs to the AC-input version
and DC-input versions of the RPS6U power supplies in a VM600 rack.
Figure 2-28 shows:
a. The associated panel at the rear of the ABE04x rack
Rear panel ordering number: 200-582-970-NHh
(equivalent VM600SYS order option code: F700).
b. Details of the associated VM600 rack power supply wiring.
(The front panel of the AC-input version of the RPS6U rack power supply is shown in
Figure 2-15.)
A VM600 rack power supply solution using this combined AC-input and DC-input panel is
intended for use with one AC-mains (120/230 VAC) supply and one DC-mains supply, that is,
a non-redundant external power-supply system.

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 OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

vibro meter

DATA
MATRIX
2D

(a) Rear panel

(Rear panel (Internal to

connections) VM600 rack)

(b) Wiring details

Figure 2-28: Combined AC-input (120/230 VAC) and DC-input panel

with individual inputs

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OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

2.10.10 Power supply check relay

The power supply check relay provides an indication that the +5 V, +12 V and −12 V supplies
are being correctly generated and delivered by the RPS6U rack power supply or supplies to
the VM600 system rack (ABE04x) backplane. The connector for the power supply check relay
is available at the rear of the rack, on the rear panel associated with the RPS6U power supply
or supplies.

THE POWER SUPPLY CHECK RELAY IS SPECIFIED FOR OPERATION WITH SEPARATED
OR SAFETY EXTRA-LOW VOLTAGE (SELV) SYSTEM VOLTAGE LEVELS:

• MAXIMUM SWITCHING VOLTAGE OF ±30 VRMS / ±42.4 VAC(PEAK) OR 60 VDC .

NOTE: Refer to the VM600 system rack (ABE040 and ABE042) data sheet for further
information on the power supply check relay.

As shown in Figure 2-29, the connector for the power supply check relay has three pins that
provide access to the relay contacts, defined from left to right as COM, NO and NC.
Apart from the power supply check relay connector, the other components shown in
Figure 2-29 are mounted on the VM600 rack (ABE04x) backplane.

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 OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

+5 VPWS1
On rear panel

+5 VPWS2

RL7

Normally closed (NC)

Normally open (NO)
Common (COM)
PS2 (RPS6U) PS1 (RPS6U)
+5 VPWS2 +5 VPWS1

RL4 RL1
–12 VPWS2 –12 VPWS1

RL5 J17 RL2 J16

+12 VPWS2 +12 VPWS1

RL6 RL3

0V

Figure 2-29: Operation of the power supply check relay for the RPS6U power supplies
installed in a VM600 rack (ABE04x)

Notes
1- General Remarks:
• Jumpers J16 and J17 have to be set according to which RPS6U rack power supplies
are used (PS1, PS2 or both).
• Relays RL1 to RL6 are closed when the corresponding supply voltage (+5 V, −12 V
or +12 V) is present and correct.
• When no problem is detected, relay R7 is energised and contact is made between
the power supply check relay’s COM and NO contacts.
• If a problem is detected, relay R7 is de-energised and contact is made between the
power supply check relay’s COM and NC contacts.
2- When only the first RPS6U (PS1) is installed (slots 18 to 20):
• Jumper J16 must be left open
• Jumper J17 must be closed.

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OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

3- When only the second RPS6U (PS2) is installed (slots 15 to 17):

• Jumper J16 must be closed
• Jumper J17 must be left open.
4- When both RPS6Us (PS1 and PS2) are installed:
• Jumper J16 must be left open
• Jumper J17 must be left open.

2.10.11 Power supply labelling

Information regarding the DC and AC inputs for the RPS6U rack power supplies used by a
VM600 system rack (ABE04x) is available as follows:
• For later versions of VM600 system racks:
• Input labels close to the input connectors on the associated rear panels provide the
specifications for the RPS6U power supply inputs (see 2.10.9 Associated rear
panels).
• A VM600SYS label on a rear panel provides additional information about the VM600
system such as order number and system configuration (SysCFG) number
(see Figure 2-30).
• For earlier versions of VM600 system racks, a VM600SYS label on a rear panel provides
the specifications for the RPS6U power supply inputs and additional information about
the VM600 system such as order number (see Figure 2-31).

vibro meter

DATA
MATRIX
2D

Figure 2-30: Example VM600SYS label (later versions of VM600 system racks)

Rated DC supply voltage range:

(Corresponding rack power supply PNR / model)
18-32VDC (200-582-200-xxx / SIM-275D-24)
38.4-57.6VDC (200-582-200-xxx / SIM-275D-48)
57.6-100VDC (200-582-200-xxx / SIM-275D-72)
80-145VDC (200-582-200-xxx / SIM-275D-B0)

Rated AC supply voltage range and its frequency:

(Corresponding rack power supply PNR / model)
115-230VAC 50/60Hz (200-582-500-xxx / SIM-275A)

Maximum active power

Figure 2-31: Example VM600SYS label (earlier versions of VM600 system racks)

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 OVERVIEW OF VM600 MPS HARDWARE
RPS6U rack power supply (ABE04x only)

2.10.12 Auxiliary sensor power supply

The following versions of the auxiliary sensor power supply (ASPS) are available for
operation with an RPS6U:
• An ASPS intended for use with an AC-mains supply.

NOTE: As it requires an AC-mains supply input, the ASPS can only be used when an
AC-input version of the RPS6U is also mounted in the rack.

The ASPS is mounted in the rear of the rack, adjacent to the rear panel associated with the
RPS6U rack power supply from which it (internally) takes the AC-mains supply. Depending
on whether a single-input or a dual-input rear panel is used as an input to the RPS6U, the
ASPS will mounted in either slots 17 to 18, or slots 15 to 16.

2.10.12.1 Rear panel

Figure 2-32 shows the panel of the ASPS (rear of ABE04x rack).

DC OUT #1
24Vdc - 1.1A
Vdc - GND - NC

DC OUT #2
24Vdc - 1.1A
Vdc - GND - NC

Figure 2-32: ASPS intended for use with an RPS6U (AC-mains supply input)

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OVERVIEW OF VM600 MPS HARDWARE
RPS1U rack power supply (ABE056 only)

2.11RPS1U rack power supply (ABE056 only)

The following versions of the RPS1U rack power supply are available:
• An RPS1U for use with an AC-mains supply.
• An RPS1U for use with a DC-mains supply.
The different versions are distinguished by their ordering number (refer to the VM600 slimline
rack (ABE056) data sheet).
The RPS1U rack power supply must be with an appropriate connection panel at the rear of
the VM600 rack in order to allow the connection of external AC-mains or DC-mains power to
the rack. See also 8.3 Rack safety requirements.
HAZARDOUS VOLTAGES EXIST WITHIN VM600 SLIMLINE RACKS (ABE056).
WHEN A CARD OR PANEL IS REMOVED FROM A VM600 SLIMLINE RACK (ABE056),
THE RACK BACKPLANE – CONTAINING HAZARDOUS VOLTAGES – IS EXPOSED AND
THERE IS THE RISK OF ELECTRIC SHOCK.

SEE ALSO HAZARDOUS VOLTAGES AND THE RISK OF ELECTRIC SHOCK ON PAGE XV.

2.11.1 Power supply check relay

The power supply check relay provides an indication that the +5 V, +12 V and −12 V supplies
are being correctly generated and delivered by the RPS1U rack power supply to the VM600
slimline rack (ABE056) backplane. The connector for the power supply check relay is
available at the rear of the rack.

THE POWER SUPPLY CHECK RELAY IS SPECIFIED FOR OPERATION WITH SEPARATED
OR SAFETY EXTRA-LOW VOLTAGE (SELV) SYSTEM VOLTAGE LEVELS:

• MAXIMUM SWITCHING VOLTAGE OF ±30 VRMS / ±42.4 VAC(PEAK) OR 60 VDC .

NOTE: Refer to the VM600 slimline rack (ABE056) datasheet for further information on the
power supply check relay.

As shown in Figure 2-33, the connector for the power supply check relay has three pins that
provide access to the relay contacts, defined from left to right as COM, NO and NC.
Apart from the power supply check relay connector, the other components shown in
Figure 2-33 are mounted on the VM600 rack (ABE056) backplane.

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 OVERVIEW OF VM600 MPS HARDWARE
RPS1U rack power supply (ABE056 only)

On rear panel

+5 V

RL7

+5 V

Normally closed (NC)

Normally open (NO)
RL4 Common (COM)
–12 V

RL5
+12 V

RL6

0V

Figure 2-33: Operation of the power supply check relay for the RPS1U power supply
installed in a VM600 rack (ABE056)

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OVERVIEW OF VM600 MPS HARDWARE
RPS1U rack power supply (ABE056 only)

2.11.2 Power supply labelling

Information regarding the DC and AC inputs for the RPS1U power supply used by the VM600
slimline rack (ABE056) is available on labels on the top and rear of the rack (see Figure 2-34).

Rated DC supply voltage range (corresponding rack PNR):

18-58VDC (VM600-1U/200/x/x)
(a) DC-input
supply Maximum active power

(b) AC-input Rated AC supply voltage range and frequency

supply (corresponding rack PNR):
90-264VAC (VM600-1U/100/x/x)

Maximum active power

Figure 2-34: RPS1U power supply information (ABE056)

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 GENERAL SYSTEM DESCRIPTION
System elements

3 GENERAL SYSTEM DESCRIPTION

3.1 System elements

In order to gain an understanding of the operation of a VM600 machinery protection system
(MPS), it is necessary to consider the interaction of the principal elements making up this
system, namely:
1- ABE04x (19" x 6U) rack or ABE056 (19" x 1U) rack
2- RPS6U rack power supply
3- MPC4 machinery protection card
4- IOC4T input/output card for the MPC4
5- AMC8 analog monitoring card
6- IOC8T input/output card for the AMC8
7- RLC16 relay card (16 relays)
8- IRC4 intelligent relay card (4 DPDT or 8 SPDT relays).

An ABE04x rack can also contain the following:

9- CPUM modular CPU card
10- IOCN input/output card for the CPUM.

As outlined in 1.3 Communicating with the VM600 MPS, the number of different elements
used depends on the complexity of the system and the specific application. However, a rack
necessarily has one of the following possibilities:
• Only MPC4 / IOC4T card pairs
• Only AMC8 / IOC8T card pairs
• A combination of MPC4 / IOC4T and AMC8 / IOC8T card pairs.

A networked ABE04x has one of the following additional possibilities:

• A CPUM card on its own
• A CPUM / IOCN card pair.

3.2 Rack with MPC4 / IOC4T card pairs

Figure 3-1 shows a block diagram of a networked rack featuring MPC4 / IOC4T card pairs. It
shows the interaction between these two cards as well as between them and other cards in
the rack.
The signals coming from measurement transducers and devices (such as accelerometers,
pressure transducers, proximity transducers, RTD thermometers and flow meters) are
connected to the IOC4T via the inputs CH1, CH2, CH3 and CH4, which are accessible at the
rear of the ABE04x rack. These raw signals are available to the user on BNC connectors
(named RAW OUT) on the panel of the MPC4 card. They are also available on the IOC4T
connector (raw outputs RAW 1H and RAW 1L, RAW 2H and RAW 2L, RAW 3H and
RAW 3L, and RAW 4H and RAW 4L).

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GENERAL SYSTEM DESCRIPTION
Rack with MPC4 / IOC4T card pairs

The raw signals are processed by the MPC4 card using both analog signal processing and
digital signal processing. This card handles the management of signals, alarm levels, signal
processing and so on. The user is able to modify parameters concerning these operations by
using one of the VM600 MPS software packages (MPS1 or MPS2), from Meggitt Sensing
Systems’ Vibro-Meter product line.
Four alarm levels can be set for each channel, typically called Alert− (A−), Alert+ (A+),
Danger− (D−) and Danger+ (D+). These alarms, or combinations of them, can be used to
drive alarm outputs (relay outputs) on the IOC4T card. The OC Bus or Raw Bus can be used
to drive relays on an optional RLC16 card.
A DC output is available on the IOC4T card for each of the four measurement channels.
These outputs (DC OUT 1 to DC OUT 4) can be calibrated by software and configured by
jumpers to provide either a current-based signal (4 to 20 mA) or voltage-based signal
(0 to 10 V).
Three discrete signal interface (DSI) control inputs are available on the IOC4T card:
• Danger Bypass (DB) – To inhibit relay outputs associated with the Danger levels (D−
and D+).
• Trip Multiply (TM) – To selectively increase the Alert and Danger levels by a
programmable multiplying factor.
• Alarm Reset (AR) – To reset (clear) latched alarms.
The TACHO 1 and TACHO 2 inputs on the IOC4T card are intended for the connection of
rotational speed measurement systems. These signals (suitably shaped to be
TTL-compatible) are available on the BNC connectors (named TACHO OUT 1 and
TACHO OUT 2) on the panel of the MPC4 card. They can also be routed under software
control to other cards in the MPS rack via the Tacho Bus.
The VM600 MPS software packages and Modbus can be used to send channel inhibit
commands to individual MPC4 channels (measurement and speed) in order to temporarily
bypass a sensor, that is, to temporarily inhibit the protection offered by any associated relays.

NOTE: The safety version of the MPC4 card (MPC4SIL) does not does not support the
danger bypass (DB), trip multiply (TM) and channel inhibit functions.

The CPUM card acts as a “rack controller”. In general, it communicates with the
MPC4 / IOC4T card pairs over the VME bus.

NOTE: The safety version of the MPC4 card (MPC4SIL) does not have a VME bus
interface so it cannot communicate with a CPUM or any other cards in a VM600
rack (see 4 MPC4 / IOC4T card pair).

The CPUM, and therefore the rack, can communicate with the outside world over RS-232 and
Ethernet links. The CPUM can operate on its own in the rack, but it is generally used with the
associated IOCN card. Depending on the options installed, the IOCN allows communication
with a host computer or computer network over one or several RS 232, RS-422, RS-485 or
Ethernet links.
See 4 MPC4 / IOC4T card pair for more detailed information on the MPC4 / IOC4T card pair.

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 GENERAL SYSTEM DESCRIPTION
Rack with MPC4 / IOC4T card pairs

OC Bus RLC16 or
IOC4T Card IRC4 Card
Slot X (Rear Cage) Slot Y (Rear Cage)
Local Relays
Trip
RL1 RL1
Multiply TM 16
Danger
EMC Prot.

Bypass DB Open-collector RL2

EMC Protection
Alarm drivers
Reset AR
RL3
RL16 (RLC16)
RET or RL8 (IRC4)
IP Bus RL4
(Industry Pack)
3 Industry Pack
Interface
To/from Raw Outputs
Speed MPC4 1H & 1L 64
Channels

EMC Protection
2H & 2L
EMC Protection

Tacho 1 Digital-to-
0-10 V Raw Bus
Analog
Tacho 2 Conversion 3H & 3L

4H & 4L
Voltage-to-
Measurement Current
DC Outputs
Channels Conversion
1
CH1
4-20 mA

EMC Protection
Jumper 2
CH2
EMC Protection

Selection
3
CH3 2 chan.

4
CH4
4 chan. RET

Connector P4
VM600 Rack
Backplane
Connector P2

IOCN Card
RAW OUT Slot 0 (Rear Cage)
1
4 chan. (Raw signals) RS232 RS
or RS485
2
EMC Protection

Analog Analog A
Speed Measurement 32 diff. 2 x RS485
Channel Channel or RS422
3 Processing Processing B
Raw Bus 2 x RS485
or RS422

4 1
Analog-to-Digital Ethernet 1
Conversion 2
Ethernet 2
Digital 6
TACHO Speed
OUT
Channel
EMC Protection

1 Processing
Digital Signal Tacho Bus
2 chan.
Processing RS232
2
XX X.X

DIAG/STAT.
1
(Channel status) 6 Ethernet
Micro-Controller
RS-232
EMC Prot.

IP Bus
Industry Pack (Industry Pack)
Interface VME Bus XXX

To/from XXX
Note: The safety
IOC4T version of the MPC4
card (MPC4SIL) does
not have a VME bus
MPC4 Card interface. CPUM Card
Slot X (Front Cage) Slots 0+1 (Front Cage)

Figure 3-1: Block diagram of cards in a VM600 MPS

(configuration based on MPC4 / IOC4T card pairs)

VM600 MPS hardware manual (standard version) MAMPS-HW/E 3-3

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GENERAL SYSTEM DESCRIPTION
Rack with AMC8 / IOC8T card pairs

3.3 Rack with AMC8 / IOC8T card pairs

Figure 3-2 shows a block diagram of a networked rack featuring AMC8 / IOC8T card pairs. It
shows the interaction between these two cards as well as between them and other cards in
the rack.
The signals coming from measurement transducers and devices (such as RTD
thermometers, flow meters and proximity transducers) are connected to the IOC8T via the
inputs CH1 to CH8, which are accessible at the rear of the ABE04x rack.
The raw signals are processed by the AMC8 card using both analog signal processing and
digital signal processing. This card handles the management of signals, alarm levels, signal
processing and so on. The user is able to modify parameters concerning these operations by
using one of the VM600 MPS software packages (MPS1 or MPS2), from Meggitt Sensing
Systems’ Vibro-Meter product line.
Four alarm levels can be set for each channel, typically called Alert− (A−), Alert+ (A+),
Danger− (D−) and Danger+ (D+). These alarms – or combinations of them – can be used to
drive alarm outputs (relay outputs) on the IOC8T card. The OC Bus or Raw Bus can be used
to drive relays on an optional RLC16 card.
A DC output is available on the IOC8T card for each of the eight measurement channels.
These outputs (DC OUT 1 to DC OUT 8) can be calibrated by software and configured to
provide a current-based signal (4 to 20 mA) or voltage-based signal (0 to 10 V). The choice
between current and voltage is made by setting solder bridges on the IOC8T card. This
operation is normally done in the factory before delivery. The default setting provides a
current-based output.
Two discrete signal interface (DSI) control inputs are available on the IOC8T card:
• Danger Bypass (DB) – To inhibit relay outputs associated with the Danger levels (D−
and D+).
• Alarm Reset (AR) – To reset (clear) latched alarms.
The VM600 MPS software packages and Modbus can be used to send channel inhibit
commands to individual AMC8 channels in order to temporarily bypass a sensor, that is, to
temporarily inhibit the protection offered by any associated relays.
The CPUM card acts as a “rack controller”. It communicates with the AMC8 / IOC8T card
pairs over the VME bus. The CPUM, and therefore the rack, can communicate with the
outside world over RS-232 and Ethernet links. The CPUM can operate on its own in the rack,
but it is generally used with the associated IOCN card. Depending on the options installed,
the IOCN allows communication with a host computer or computer network over one or
several RS-232, RS-422, RS-485 or Ethernet links.
See 5 AMC8 / IOC8T card pair for more detailed information on the AMC8 / IOC8T card pair.

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 GENERAL SYSTEM DESCRIPTION
Rack with AMC8 / IOC8T card pairs

OC Bus RLC16 or
IOC8T Card IRC4 Card
Slot X (Rear Cage) Slot Y (Rear Cage)
Local Relays
RL1 RL1
Danger
16
Bypass DB
EMC Prot.

RL2
Open-Collector

EMC Protection
Alarm
Reset AR Drivers 4
RL3
RL16 (RLC16)
RET or RL8 (IRC4)
IP Bus RL4
(Industry Pack)
2 Industry Pack
Interface
Measurement To/from
64
Channels AMC8
8 chan.

CH1 Digital-to- Raw Bus

0-10 V
Analog Conv.
8 (8 channels)
CH2 Adaptation for
DC Outputs
RTD or TC probe
CH3 1
Voltage-to- 2
EMC Protection

CH4
Current
Analog-to -Digital Conversion 3
CH5

EMC Protection
Conversion 4
4-20 mA
CH6 5
Selection by 6
CH7 solder points
Digital Signal (factory set, 7
Processing default = current ) 8
CH8
RET

Connector P4
VM600 Rack
Backplane
Connector P2

IOCN Card
DIAG/
STATUS
Slot 0 (Rear Cage)
RS232 RS
ou RS485
1
A
2 x RS485
2 ou RS422
IP Bus B
(Industry Pack) 2 x RS485
3 Industry Pack
ou RS422
Interface
To/from Tacho Bus 1
4 IOC8T Ethernet 1
2
Ethernet 2
For CJC
5 signal
2 (Tacho lines routing
Micro-Controller 7 and 8)
6 (+ RAM)

7 RS232
XX X.X
8

Ethernet

RS-232
EMC Prot.

VME Bus XXX

XXX

AMC8 Card CPUM Card

Slot X (Front Cage) Slots 0+1 (Front Cage)

Figure 3-2: Block diagram of cards in a VM600 MPS

(configuration based on AMC8 / IOC8T card pairs)

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GENERAL SYSTEM DESCRIPTION
VM600 6U 19" rack backplane (ABE04x)

3.4 VM600 6U 19" rack backplane (ABE04x)

3.4.1 General overview

The VM600 MPS using a 6U 19" system rack (ABE04x) with a custom-designed backplane
combines features of a VME backplane and other special features to support Meggitt Sensing
Systems’ Vibro-Meter product line (see Figure 3-3 and Figure 3-4).
This backplane consists of 3 different systems:
• A VME bus (P1)
• An analog bus (P3)
• Through connections between P2 and P4.

Shield

P1 P3

... ...
... ...
... ...

Front card cage Rear card cage

of VM600 rack of VM600 rack
(Female connectors) (Male connectors)

P2 P4

... ...
... ...
... ...

Backplane

Figure 3-3: Cross-section of a VM600 rack (ABE04x) backplane

showing the four buses and connectors

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The P1 bus, on the front side of the backplane, is used for slots 0 to 14 in order to implement
a standard VME bus on the front side of the backplane. This corresponds to the VME 16
specifications and allows 24-bit address and 16-bit data transfers between cards in the rack.

NOTE: The safety version of the MPC4 card (MPC4SIL) does not have a VME bus
interface so it cannot communicate with a CPUM or any other cards in a VM600
rack (see 4 MPC4 / IOC4T card pair).

The P2 and P4 connectors are used for slots 0 to 14 in order to connect the card in the front
card cage to the card immediately behind it in the rear card cage (through connections).

Slots 15 and 18 of the rack are reserved for RPS6U rack power supplies. The backplane is
equipped with special high-current connectors (type H15) for these power supplies.

The P3 bus, on the rear side of the backplane, actually consists of the following three buses:
1- The Tacho Bus
This is composed of eight lines. These lines have passive terminations.
The Tacho Bus is common to all slots in the rack. It is intended for the transfer of speed
and phase reference signals between cards.
See 3.4.2 Tacho Bus for further information.
2- The Open Collector (OC) Bus
This is composed of 96 open collector (“ground/open") lines. These lines do not have
terminations.
The OC Bus is sub-divided into 6 buses each having 16 lines (these buses are called
OCA, OCB, OCC, OCD, OCE, OCF). Each of these six buses is associated with three
slots (with each slot associated with only one bus).
See 3.4.3 Open Collector Bus for further information.
3- The Raw Bus
This is composed of 32 x 2 lines. These lines do not have terminations.
The Raw Bus is common to all slots in the rack.
See 3.4.4 Raw Bus for further information.

The Tacho Bus, the Open Collector Bus and the Raw Bus are not buses in the
microcomputing sense of the term, that is, there is no protocol, handshaking, timing and so
on. Rather, they should be thought of as groups of lines that can be used to transmit signals.

NOTE: See Appendix C - Definition of backplane connector pins for full details on the P1,
P2, P3 and P4 connectors.

See also 8.2 Attribution of slots in the rack for further information on which VM600 cards can
be installed in which slots of a VM600 rack (ABE04x and ABE056).

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VM600 6U 19" rack backplane (ABE04x)

15 module slots (VME) 2 power supply slots

CPUM Reserved These 12 slots accept MPC4 or AMC8 cards RPS6U RPS6U
card rack power rack power
supply supply

Slot 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 18

VME P1 bus (all VME 16 signals)

P1 connector wired P2 connector used for Special high-current

according to rear-to-front signal connector
VME 16 connection and control
specification of the IOC card by the
MPC4 or AMC8 card

Figure 3-4: Diagram of VM600 rack (ABE04x) backplane

showing the arrangement of the connectors

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3.4.2 Tacho Bus

The Tacho Bus has eight lines and is common to all slots in the rack. It is intended for the
transfer of speed signals between cards.
Speed signals can be put onto the Tacho Bus from an IOC4T card. This is done by
multiplexers that are under software control (see Figure 3-5). These multiplexers allow one
or both of the “local" speed signals on IOC #A to be sent to another card, for example to
IOC #B. Software-controlled demultiplexers on IOC #B allow the speed signal to be brought
off the bus and onto the card. Once on IOC #B, these signals can be used by the
corresponding MPC4 card (MPC #B). This technique is known as using “remote" speed
signals.
The VM600 MPSx software ensures that two or more speed signals are not sent to the same
Tacho Bus line. A signal on a given Tacho Bus line can be used by more than one card.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

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 3 - 10
To MPC #A To MPC #B

SPEED 1B “REMOTE” SPEED 1A “REMOTE”

SPEED 2B “REMOTE” SPEED 2A “REMOTE”

Demulti Demulti Demulti Demulti

-plexer -plexer -plexer -plexer

Control signal Control signal Control signal Control signal

GENERAL SYSTEM DESCRIPTION

(see note 1) (see note 1) (see note 1) (see note 1)

VM600 6U 19" rack backplane (ABE04x)

TACHO BUS
Multi- Multi- Multi- Multi-
plexer plexer plexer plexer

Control signal Control signal Control signal Control signal

(see note 1) (see note 1) (see note 1) (see note 1)

From IOC #A To MPC #A From IOC #B To MPC #B

SPEED 1A SPEED 1A “LOCAL” SPEED 1B SPEED 1B “LOCAL”
SPEED 2A SPEED 2A “LOCAL” SPEED 2B SPEED 2B “LOCAL”

IOC #A IOC #B

Notes
1. Software generated control signal to inhibit the
(de)multiplexer or select the appropriate line.

Figure 3-5: Schematic of the Tacho Bus

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VM600 6U 19" rack backplane (ABE04x)

3.4.3 Open Collector Bus

Each Open Collector Bus (OC Bus) contains 16 parallel bus lines and is a dedicated bus
linking one specific IRC4 or RLC16 card to two specific IOC4T or IOC8T cards (see
Figure 3-6).
The OC buses are reserved for sending alarm signals from an MPC4 / IOC4T card pair or an
AMC8 / IOC8T card pair to an IRC4 or RLC16 card. These signals are then used to switch
relays on the IRC4 or RLC16.
The ABE04x rack contains the following dedicated OC Buses:

Table 3-1: Slots linked by the various OC Buses

RLC16 IRC4 IOC4T or IOC8T

OC Bus name
slot location slot location slot location

OC Bus A Slot 1 Slot 1 Slots 3 and 4

OC Bus B Slot 2 Slot 2 Slots 5 and 6
OC Bus C Slot 15 Slot 15 Slots 7 and 8
OC Bus D Slot 16 N/A Slots 9 and 10
OC Bus E Slot 17 N/A Slots 11 and 12
OC Bus F Slot 18 N/A Slots 13 and 14

Raw Bus

OC Bus F

OC Bus E

OC Bus D

OC Bus C

OC Bus B

OC Bus A

18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RLC16 IOC4T, IOC8T, IRC4 or RLC16 IOCN
locations locations location

IRC4 or RLC16 IRC4 or RLC16

location locations

Figure 3-6: Rear view of rack showing the six dedicated OC Buses
and the Raw Bus (top)

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VM600 6U 19" rack backplane (ABE04x)

The IOC card drives the OC Bus lines using open collector driver circuitry (see Figure 3-7).
In the event of an alarm, the bus driver control signal goes high.
The attribution of a specific alarm signal (generated by an MPC4 / IOC4T card pair or an
AMC8 / IOC8T card pair) to an OC Bus line is done under software control.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

The attribution of a specific line on the OC Bus to a specific relay on the RLC16 is done by
setting jumpers on the RLC16. This is described in 9.12.1 Using the Open Collector Bus (OC
Bus) to switch relays and 10.8.1 Using the Open Collector Bus (OC Bus) to switch relays.
The IRC4 doesn’t have any jumpers but in order to use the OC Bus signals, the location of
the card must be as defined in Table 3-1.

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RELAY #A
(see note 3)

One of the 16
Open collector lines on OC Bus x
driver

Jumpers to select
relay NE/NDE
Jumpers to select (see note 2)
OC Bus line

RLC16 in slot m
Control signal Control signal m = {1, 2, 15, 16, 17 or 18} for the OC Bus
(see note 1) (see note 1)
m = {1 to 18} for the Raw Bus

RELAY #B
(see note 4)

One of the 16
Open collector lines on OC Bus x
driver
Logic

IRC4 in slot m
m = {1, 2 or 15} for the OC Bus
m = {1 to 15} for the Raw Bus
IOC in slot n IOC in slot n+1
n = {3, 5, 7, 9, 11 or 13}

Notes
1. Specific alarms (A+, D− and so on) are attributed to the OC Bus lines using the VM600 MPSx software.
See Table 9-4 for information on the normal state of the control signal.
2. For a normally energised (NE) relay, select an inverted relay control line by placing jumper Jc.
For a normally de-energised (NDE) relay, select jumper Jb.
Either Jb or Jc must be selected (that is, it is not possible to select both or to select neither).
3. Relay #A represents one of the 16 relays (RL1 to RL16) on the RLC16 card.
4. Relay #B represents one of the 8 relays (4 DPDT or 8 SPDT) on the IRC4 card.

Figure 3-7: Using of one of the 16 OC Bus lines to switch a relay on a RLC16 or IRC4 cards

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VM600 6U 19" rack backplane (ABE04x)

3.4.4 Raw Bus

The Raw Bus contains 64 parallel bus lines, arranged as 32 differential line pairs. The
ABE04x system rack contains a single bus of this type which is common to all cards located
in slots 1 to 18 (see Figure 3-6). As such, this is a flexible bus allowing the transfer of data
between various cards in the rack (see Figure 3-6). Its principal applications are to:
• Share raw analog signals input on channels 1 to 4 of an IOC4T card with other cards in
the rack (for example, to CMC16, XMC16 or XMV16 cards installed in a rack featuring
both MPS and CMS hardware). An example of this is shown in Figure 3-8.

NOTE: The XMVS16 card has the same capabilities and features as the XMV16 card,
except that the XMVS16 cannot access and therefore cannot configure
anything on the VM600 raw bus.

Use of the Raw Bus for this purpose is described further in 9.11 Using the Raw Bus to
share measurement channel inputs.
• Supplement the OC Bus by allowing additional alarm signals to be routed to the relays
on an IRC4 or RLC16 card.
Use of the Raw Bus for this purpose is described further in 9.12.2 Using the Raw Bus to
switch relays and 10.8.2 Using the Raw Bus to switch relays.
Signals are placed on the Raw Bus by setting jumpers on an IOC4T (see Figure 3-8). If the
signals are required by a CMC16 card, the appropriate switches must also be set on the
corresponding IOC16T card.
If the signals are required by a XMC16 or XMV16 card, the corresponding XIO16T card is
configured using the VibroSight ® software (that is, the XIO16T hardware is fully software
configurable).

IOC4T #A IOC4T #B IOC16T #A

Jumper Jumper
Switches
matrix matrix

Figure 3-8: Use of the Raw Bus to transfer analog signals between cards

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NOTE: The IOC8T card does not support the Raw Bus, so sharing an analog signal
between an AMC8 / IOC8T card pair and a condition monitoring card pair (such as
the CMC16 / IOC16T) requires that either:
• A DC output from the IOC8T is connected to a dynamic input channel of the
IOC16T using external cabling
• Modbus is used to communicate the analog values (which requires that a CPUM
card is also installed in the rack).

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VM600 1U 19" rack backplane (ABE056)

3.5 VM600 1U 19" rack backplane (ABE056)

The VM600 MPS using a 1U 19" slimline rack (ABE056) with a custom-designed backplane
contains a similar version of the backplane currently used with the standard 19" 6U (ABE04x)
rack described in 3.4 VM600 6U 19" rack backplane (ABE04x).
This backplane consists of the following:
• VME power supply (P1)
• discrete bus on the back of P1 (P3)
• P2 and P4 through connections.
The different types of connectors used are:
• DIN 41612 connector, 96 male and female straight poles, press fit
• Connectors: quality level 2; mechanical life 400 connection cycles.
The section view of the backplane in Figure 3-9 shows:
• The connections of the P3 port
• The connections between P2 and P4
• The connections between the power supply connectors and backplane.

Shield

Slot Connector Bus

Slot Connector Bus 41612 96 poles 96 poles 1 :1
0
0 41612 96 poles VME 16bits P1 P3 1 41612 96 poles 96 poles 1:1

FEMALE MALE
Connectors Connectors

Slot Connector Bus Slot Connector Bus

0 41612 96 poles To P4 P2 P4 0 41612 96 poles Not bussed, abc 1:1 from P2

Figure 3-9: Cross-section of a 1U backplane showing the four connectors

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description of
VM600 MPS system

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 MPC4 / IOC4T CARD PAIR
Different versions of the MPC4 card

4 MPC4 / IOC4T CARD PAIR

4.1 Different versions of the MPC4 card

The MPC4 machinery protection card is available in different versions, including a standard
version, a separate circuits version and a safety (SIL) version.

NOTE: Both the standard and the safety (SIL) versions of the MPC4 card are certified to
IEC 61508 and ISO 13849. The MPC4SIL version was developed to permit a wider
range of installation options.

The original IEC 61508 and ISO 13849 certification process targeted a VM600 rack for
safety-related system (SRS) applications with a limited range of cards, that is, standard
MPC4 / IOC4T card pairs and RLC16 relay cards (see 4.1.1 Standard version of the MPC4).
Then Meggitt Sensing Systems decided to safety certify another system with additional
functionality, such as monitoring. To safety certify such a VM600 rack, it was necessary to
ensure that there is no possibility of the configuration being inadvertently modified. The safety
version of the MPC4 card (MPC4SIL) overcomes this potential configuration issue by not
implementing a VME bus interface, so data corruption via the VM600 rack backplane’s VME
bus is impossible.

4.1.1 Standard version of the MPC4

The standard MPC4 card is the original version, intended for systems using a VM600 rack
with a limited range of cards, that is, standard MPC4 / IOC4T card pairs and RLC16 relay
cards.
The standard MPC4 has a VME-compatible slave interface and is software configurable via
RS-232 (on the panel of the MPC4 card) or via VME for a networked VM600 rack. It also
supports all processing modes (see Table 7-1).

4.1.2 Separate circuits version of the MPC4

The separate circuits version of the MPC4 card is intended for systems using a separate
circuits version of the VM600 rack. The separate circuits MPC4 was developed in accordance
with the CEI/IEC 60255-5 standard: “Insulation coordination for measuring relays and
protection equipment – Requirements and tests” and has slightly different circuitry
(see 9.10 Grounding options).
Like the standard MPC4, the separate circuits MPC4 has a VME-compatible slave interface
and is software configurable via RS-232 (on the panel of the MPC4 card) or via VME for a
networked VM600 rack. It also supports all processing modes (see Table 7-1).

4.1.3 Safety version of the MPC4

The safety (SIL) version of the MPC4 card, that is the MPC4SIL, was developed to permit a
wider range of installation options with a single VM600 rack, for example, condition
monitoring in addition to machinery protection. To safety certify these systems, it was
necessary to ensure that the safety MPC4 is isolated from the other cards in a VM600 rack,
so that there is no possibility of its configuration being inadvertently modified.
As the safety MPC4 (MPC4SIL) does not have a VME bus interface, corruption of its
configuration is impossible as it is only software configurable via RS-232 (on the panel of the
MPC4 card). Therefore, it is now possible to define a single VM600 rack configuration
containing condition monitoring cards (such as the CMC16 and XMx16) and relay cards (such

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MPC4 / IOC4T CARD PAIR
Different versions of the MPC4 card

as the IRC4 and RLC16) in addition to safety-related machinery protection in the form of
safety MPC4 cards.
However, the safety MPC4 card (MPC4SIL) does not support all of the processing modes
supported by the standard and the separate circuits versions of the MPC4 cards (see
Table 7-1). For example, the MPC4 SIL card does not support the speed/phase reference
(tachometer) input channels, the Narrow Band (Tracking) Vibration and Smax processing
functions, and it does not support the danger bypass (DB), trip multiply (TM) and channel
inhibit functions.
In addition, the use of standard MPC4 cards or safety MPC4 cards in a machinery monitoring
system for a safety-related application requires that the complete system configuration is
manually reviewed in order to:
• Ensure that the VM600 rack configuration is permitted.
• Avoid possible conflict from additional cards.
• Ensure that the MPC4 cards’ configurations are permitted.

NOTE: Refer to the VM600 safety manual for further information.

4.1.4 Identifying different versions of the MPC4 card

The different versions of the MPC4 card can be visually identified from their panels, as the
lower handle on the panel is different.
• For the standard and separate circuits versions of the MPC4 card, the label on the lower
handle of the panel displays the text “MPC 4” against a blue background, as shown in
Figure 4-1 (a).
• For the safety (SIL) version of the MPC4 card, the label on the lower handle of the panel
displays the circular TÜV Nord logo and text “MPC 4” against an orange background, as
shown in Figure 4-1 (b).

The ordering number (PNR) for a MPC4 card is in given in the format 200-510-SSS-xHh.
In this PNR, x represents the version of the MPC4 card as follows:
• 1 indicates the standard version of the card.
• 2 indicates the separate circuits version of the card.
• 3 indicates the safety (SIL) version of the card.

NOTE: Refer to the MPC4 machinery protection card data sheet for further information.

In the VM600 MPSx software (version 2.6.x or later):

• MPC4 is used to refer to the standard and separate circuits versions of the MPC4 card.
• MPC4SIL is used to refer to safety version of the MPC4 card.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

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 MPC4 / IOC4T CARD PAIR
Different versions of the MPC4 card

(a) Standard version and separate circuits (b) Safety version of the MPC4 card
version of the MPC4 card (that is, the MPC4SIL)

Figure 4-1: Different versions of the MPC4 card

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MPC4 / IOC4T CARD PAIR
General block diagram

4.2 General block diagram

A block diagram of the MPC4, IOC4T, RLC16 and IRC4 cards is shown in Figure 4-2. This
shows schematically the backplane, which physically divides the ABE04x rack into a front
card cage and a rear card cage.
The MPC4 (shown on the left of Figure 4-2) is mounted in the front card cage. This card
effects the signal processing functions for the MPS. Its panel contains BNC connectors to
output the raw measurement signals (for example, corresponding to vibration or dynamic
pressure) and speed signals. An LED indicator (DIAG/STATUS) shows the hardware status
of the MPC4 / IOC4T card pair. Additional LED indicators are present to provide information
on the status of each individual channel (such as signal valid or the presence of alarms). The
panel also has a 9-pin D-sub connector for configuring an MPC4 card used in a stand-alone
rack, that is, one not containing a CPUM card.
Each MPC4 card is necessarily connected (via the backplane) to an IOC4T input/output card
mounted in the rear card cage. The IOC4T card's panel (rear of rack) has screw terminals for
connecting the signal transmission lines coming from the transducers (for example, from
vibration and speed transducers). Other screw terminals are used to output raw signals as
well as processed signal values (0 to 10 V or 4 to 20 mA).
The IOC4T contains 4 local relays with outputs available on the screw terminal strip. In
applications needing more than the four relays provided by the IOC4T, an RLC16 relay card
or an IRC4 intelligent relay card can be installed in the rack.
The RLC16 card contains 16 relays and has a terminal strip with 48 screw terminals (3 strips
each having 16 terminals).
The IRC4 card contains 8 relays that can be combined as 4 DPDT or 8 SPDT and has a
terminal strip with 32 screw terminals (2 strips each having 16 terminals).

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Rack backplane
Abbreviations:
8x3
ADC = Analog-to-digital converter, AR = Alarm Reset, DAC = Digital-to-analog converter, 2 x screw
DB = Danger Bypass, DSP = Digital signal processor, IRC4 (Rear card cage)
6
Relays
terminal strip
EMC = Electromagnetic compatibility, IP = Industry pack, I/P = Input, Intelligent relay card with 4 DPDT or 8 SPDT DSI (J1, J2)
JS = Jumper selectable, OC = Open Collector, TM = Trip Multiply,
SW = Software, VME = VERSAbus module eurocard.

RLC16 (Rear card cage) 16x3

Relays
3 x screw
terminal strip
Relay card with 16 change-over contacts (J1, J2, J3)

MPC4 (Front card cage)

IOC4T (Rear card cage)
4 4
Raw meas. signal
Front Vib. Raw (H)
EMC prot.

EMC
panel Buffer Buffer prot. Vib. Raw (L)
4 4
BNCs
Raw signal and
OC selection
Analog (jumper matrix)
Meas. sensors
ADC meas. EMC 4
Sensor Power
MPC4 channels prot. 4 Sensor I/P (Hi)
4x2

3 x screw terminal strip (J1, J2 and J3)

panel (Gain, 2
4
Sensor I/P (Lo)
anti-alias, etc.) 4
Shield
16 Open
Local EMC RL1, RL2,
(Filtering, Sensor collector
OC relays prot. RL3 and RL4
integration, DSP power driver 4

rectification) supply Bus

IP Switch 3 DB
IP
Interface input TM
1 interface
DIAG/ decoder AR
STATUS EMC
(Monitoring, Micro- prot.
Channel
6 configuration) Controller 0 to 10 V
4-channel DC OUT
status 4
DAC 0 to 10 V or

JS
RS-232 VME
U/I
interface 4 to 20 mA (JS)
EMC prot.

9-pin conv.
D-sub 4 to
RET
Speed 20 mA
connector Digital
(RS-232) channel
speed selection
chan. SW 2
Speed Sensors
2
Sensor Power
2
TTL Analog 2x2
2
Sensor I/P (Hi)
Front EMC
EMC prot.

speed 2

MPC4 / IOC4T CARD PAIR

prot. Sensor I/P (Lo)
panel channels
2 Shield

General block diagram

BNCs 2

64 8

Notes: VME bus Raw Bus Tacho Bus

The safety version of the MPC4 card (MPC4SIL) does (see notes) (to other (to/from
not have a VME bus interface. cards) other cards)
The ABE056 does not have a VME bus.

Figure 4-2: Block diagram of MPC4, IOC4T, RLC16 and IRC4 cards
4-5
MPC4 / IOC4T CARD PAIR
Overview of MPC4 operation

4.3 Overview of MPC4 operation

The MPC4 card implements a variety of signal processing and monitoring functions, each of
which requires real-time continuous processing of the inputs. It can execute up to a maximum
of four processes simultaneously, either on one sensor or on a combination of up to four
sensors.
The block diagram in Figure 4-3 summarises the operation of the MPC4 card.

Alarms / OK
Meas. Signal
Sensor signal Processed values**
Sensor 1 processing /
conditioning
Raw * monitoring
signal Alarms
Processed values**
Alarms / OK
Meas. Sensor signal Signal
Processed values**
Signal routing

Sensor 2 conditioning processing /

Raw * monitoring
signal

Alarms / OK VME
Meas. Sensor signal Signal
Sensor 3 conditioning processing / Processed values**
Raw * monitoring RS-232
Alarms
signal
Processed values** IOC
Alarms / OK
Meas.
Sensor signal Signal
Sensor 4
processing / Processed values**
conditioning
Raw * monitoring
signal

Speed value**
Speed Speed
Sensor 1 sensor Speed meas. OK
signal “Raw” speed signal and monitoring
(TTL compatible)

Speed value**
Speed Speed
Sensor 2 sensor Speed meas. OK
signal “Raw” speed signal and monitoring
(TTL compatible)

Dual-channel
processing
Notes
*The raw measurement signals and TTL-conditioned speed signals are output on the
MPC4 card’s panel BNC connectors and are also sent to the IOC4T.
**The “processed values” include the two “monitored” values. They also include the OK
levels of the sensors. The “speed values” are also monitored and include the OK value of
the sensor.

Figure 4-3: Operation of MPC4 machinery protection card

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Inputs and outputs

4.3.1 Sensor signal conditioning

This block (see Figure 4-3) acts as a signal interface and is used to:
• Acquire a dynamic signal from the connected sensor.
• Check for signal overload (independently of the OK line check).
• Power the connected sensor.
• Output the raw signals. These are available on BNC connectors on the panel of the card
(for example, for connection to an oscilloscope). Refer to the MPC4 machinery protection
card data sheet for buffer specifications.

4.3.2 Signal routing

This block (see Figure 4-3) enables flexible connection of signals. It allows the system to:
• Connect any sensor to any signal processing/monitoring channel input.
• Connect any sensor to two, three or four signal processing/monitoring channels. This
enables several processing/monitoring functions to be performed on the same sensor
signal.

4.3.3 Signal processing and monitoring

This block (see Figure 4-3) assures the following:
1- Selection of the Processing Function
The processing functions include the following types of monitoring: Absolute Bearing
Vibration, Relative Shaft Vibration (and Gap), Absolute Shaft Vibration, Smax,
Eccentricity, Broad-Band Pressure, Temperature and so on.
See 7 Processing modes and applications for all the possibilities available.
2- Rectification
The rectification techniques available are described in 4.5 Rectification techniques.
3- Monitoring
The rectified values are monitored and alarms generated if the thresholds are exceeded.
These alarms can be used to set relays.
The block also allows logical combinations of alarms to be configured. In addition, it
handles the Adaptive Monitoring and Direct Trip Multiply functions.
The monitoring possibilities are described in 4.6 Alarm monitoring.
4- Sensor OK Level Detection
This function monitors the OK levels for the sensor to check for hardware problems (for
example, faulty sensor or signal conditioner, or defective transmission line).
OK level detection is described in 4.7 System self-checks.
The MPS allows single and dual processing (the latter indicated by the dashed lines in
Figure 4-3). The following dual processing options can be software configured:
• Dual Processing Channels 1 & 2
• Dual Processing Channels 3 & 4.

4.4 Inputs and outputs

4.4.1 Measurement signal inputs

The sensors connected to the four measurement channel inputs (that is, the CH1, CH2, CH3
and CH4 terminals on the IOC4T) deliver conditioned signals to the MPC4 card. These
conditioned inputs are composed of AC signals with or without a DC component. Typically,

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signals from accelerometers, velocity transducers, proximity probes or dynamic pressure

probes are handled. Hardware associated with the sensors such as signal conditioners and
optional safety barriers or galvanic separations are not implemented within the MPS, but
externally.
Both voltage-based and current-based input signals are accepted by the MPS. Depending on
the sensor and signal conditioner type used, 2-wire or 3-wire transmission lines can be
connected to the inputs.
The MPC4 sends buffered input signals to the backplane for use by other cards in the system,
as well as to the BNC connectors on the MPC4 card’s panel for analysis (for example, with
an oscilloscope).
The sensors and associated electronic hardware are normally powered by the MPS. An
external power supply is required to power GSI galvanic separation units, GSV safety
barriers, and transducer and signal conditioner systems requiring a supply >25 mA.

NOTE: See 9 Configuration of MPC4 / IOC4T cards for further information on powering
sensors and associated electronic hardware.

4.4.1.1 Overview of MPC4 signal processing

The signal is processed as shown in the block diagram in Figure 4-4. This applies only to
hardware versions 200-510-100-03x, 200-510-100-1xx and 200-510-100-2xx.

. INTEGRATOR .

Input

GAP or
”DC value”

“OK value”

“OK fail”

Figure 4-4: Signal processing in the MPC4 card

(1) Signal input

If the input signal is current-based, it is read on a 324 Ω resistor to obtain a voltage-based
signal.
The signal then undergoes a first stage of amplification/attenuation (Figure 4-4, Ref. 1).
The DC and AC components of the signal are processed by two separate paths (Figure 4-4,
Ref. 2). These are described below.

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(2) Processing of DC component

The DC component is filtered by a low-pass filter (Figure 4-4, Ref. 3) having a cut-off
frequency of 10 Hz. The resulting signal is processed by an analog-to-digital converter (A/D),
which samples this signal every 10 milliseconds.
The signal is then low-pass filtered again by the DSP to reduce its bandwidth to 1 Hz. The
GAP value (or any other DC function) can now be measured and the OK levels monitored by
comparators.

(3) Processing of AC component

The first stage in the AC path is a low-pass pre-filter (Figure 4-4, Ref. 4) whose cut-off
frequency is controlled by the analog-to-digital converter (A/D). The anti-aliasing filter
(Ref. 10) is also controlled in this manner.
The first programmable gain amplifier (PGA, see Ref 6) is followed by either i) an integrator
stage with high-pass filters having a fixed cut-off frequency of 2.5 Hz (Refs 5 and 8) or
ii) directly connected through the second PGA (Ref. 9). The amplifier gains are software
controlled (namely by the FSD or Signal Dynamic parameters, whichever leads to the higher
signal-to-noise ratio).
The analog integrator (Ref. 7) is switched on when the BBAB function is selected and if the
raw vibration (in a natural unit such as "g") is not required. Otherwise, if the measurement is
required in the natural unit, then the analog integrator is by-passed and the integration is done
digitally by the firmware on the DSP (Ref. 11) if required. This last solution, however, results
in a higher noise level.
The selection of analog or digital integration is transparent to the user. A warning message
may appear if the noisier solution is selected.
Finally, the digital signal is broad-band filtered (Ref. 12). Several stages of multi-rate finite
impulse response (FIR) digital filters are used.
Rectification (RMS, RMS scaled to Peak, True Peak, True Peak-to-Peak) is performed on the
digitised and filtered signal.
The AC signal component is used in the following processing functions:
• Broad-band absolute bearing vibration (BBAB)
• Broad-band pressure (BBP)
• Narrow-band (tracking) vibration (NB)
• Relative shaft vibration (RS) – output 1
• Eccentricity (EC) with peak-peak rectifier.
The DC signal component is used in the following processing functions:
• Eccentricity (EC) with “peak-to-peak per revolution” rectifier
• Relative shaft vibration (RS) – output 2
• Position (PS)
• Absolute housing expansion (HE)
• Relative shaft expansion with pendulum (SEP)
• Quasi-static pressure (QSP).

4.4.1.2 Voltage-based input signal

Two types of voltage-based signals (AC+DC) can be considered, differing only in the
meaning of the DC component:
1- DC component is used for OK line check

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In this case there is an AC signal with a DC component, where the latter represents a
level only used for the OK system check (it must be compared against fixed OK levels).
This is applicable to systems using accelerometers, velocimeters or dynamic pressure
probes. The DC voltage can be positive or negative, depending on the polarity of the
sensor and/or signal conditioner's power supply. The AC signal is extracted and
amplified separately.
2- DC component represents gap and is used for OK line check
In this case, the DC voltage contains information. This is applicable to proximity probes,
where the DC signal represents the gap (distance between the probe tip and the shaft),
and the AC signal represents the shaft vibration. The AC and DC components are both
available for processing.
As in case (1), the DC component is used for the OK line check.

4.4.1.3 Current-based input signal

The current-based inputs fall into two categories:
1- DC component is used for OK line check
In this case there is an AC current-based signal with a DC component, where the latter
represents the supply current of the sensor (standing current). The DC component is only
used for the OK system check (it must be compared with fixed OK levels). This is
applicable to systems using accelerometers, velocity transducers or dynamic pressure
probes. Either polarity can be handled by the MPS, depending on the polarity of the
sensor and/or signal conditioner's power supply. The AC current-based signal is
processed separately.
2- DC component represents gap and is used for OK line check
In this case, the DC current contains information. This is applicable to proximity probes
(for example, the current output of IQS45x signal conditioner), where the DC signal
represents the gap (distance between the probe tip and the shaft), and the AC signal
represents the shaft vibration. The AC and DC components are both available for
processing.
As in case (1), the DC component is used for the OK line check.

4.4.1.4 Unpowered sensors

An OK line check is performed on sensors that do not require a power supply. For this, a
resistor is internally connected between the signal high input (HI) and the unused sensor
power supply terminal (PS). This is configured automatically by the VM600 MPSx software
when the Sensor Power Supply field is set to No Supply. This technique enables open
circuits to be detected, but not short circuits.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

4.4.2 Speed signal inputs

These inputs (TACHO 1 and TACHO 2) handle several kinds of speed and phase reference
transducers:
• Proximity probes (TQ/IQS type) delivering a conditioned voltage or current signal.
A power supply of −27.2 VDC is available for these probes.
• Magnetic pulse pick-up sensors (SP type) delivering a voltage whose amplitude varies
widely with speed.
• Systems delivering a TTL output.

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Only the input signal frequency is of interest for tacho processing, that is, the speed inputs
are used only to detect the edges of the signal. The edge of detection (rising or falling) is
software selectable.
The speed inputs can handle either a "one per revolution" (1/REV) phase signal coming from
a protrusion or notch on the shaft, or a speed signal generated by a toothed wheel (more than
one impulse per revolution).
Depending on the sensor and/or signal conditioner type used, 2-wire or 3-wire transmission
lines can be connected to the speed/phase reference inputs of an MPC4 / IOC4T card pair.

NOTE: See 9 Configuration of MPC4 / IOC4T cards for further information on powering
sensors and associated electronic hardware.

4.4.2.1 Trigger thresholds

As shown in Figure 4-5, the trigger thresholds for a speed/phase reference input signal
depend on the peak to peak amplitude of the input signal.
VT+, the trigger threshold on the falling edge of the input signal, is calculated as follows:
VT+ = VPEAK− + ⅔ (VPEAK+ − VPEAK− )
VT−, the trigger threshold on the rising edge of the input signal, is calculated as follows:
VT− = VPEAK− + ⅓ (VPEAK+ − VPEAK− )

Speed signal
input
0V Time

VPEAK−

VT−
VPEAK-PEAK
VT+

VPEAK+

Trigger signal

+5 V

0V Time

Figure 4-5: Trigger thresholds derived from speed/phase reference inputs

For example, with an input signal that pulses from −7 V to −15 V (that is, 8 VPEAK-PEAK):
VT+ = −7 V + ⅔ ( (−15 V) − (−7 V) ) = −7 V + ⅔ (−8 V) = −12.33 V
VT− = −7 V + ⅓ ( (−15 V) − (−7 V) ) = −7 V + ⅓ (−8 V) = −9.66 V

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4.4.3 Analog outputs

The MPC4 and IOC4T card pair provides a buffered transducer “raw” output for each of its
four dynamic signal inputs and the two tachometer (speed) inputs.
For the dynamic signal inputs, each buffered output is an analog signal that is a replica of the
transducer input signal for the channel including both AC and DC components (single-ended,
referenced to ground).
The transfer ratio for the buffered outputs of dynamic channels depends on the configured
signal transmission mode for the input:
• For a voltage input, the transfer ratio is 1 V/V.
That is, with a dynamic channel configured for a voltage input, the signal level
(amplitude) of the buffered output is the same as the input signal from the transducers.
• For a current input, the transfer ratio is 0.3245 V/mA.
That is, with a dynamic channel configured for a current input, the signal level (amplitude)
of the buffered output is a product of the transmitted current and the current measuring
resistor (324.5 Ω) at the dynamic signal input.
For the dynamic signal inputs, the buffered outputs are available on BNC connectors on the
MPC4 card (see 4.4.3.1 Front panel analog outputs (MPC4)) and on screw-terminal
connectors on the IOC4T card (see 4.4.3.2 Rear panel analog outputs (IOC4T)).
For the tachometer (speed) signal inputs, each buffered output is a digital signal that is a
level-shifted replica of the transducer input signal for the channel (single-ended, referenced
to ground).
For a speed channel, the signal level (amplitude) of the buffered output is a 0 to 5 V
TTL-compatible signal.
For the speed signal inputs, the buffered outputs are available on BNC connectors on the
MPC4 card (see 4.4.3.1 Front panel analog outputs (MPC4)).

NOTE: All of the analog outputs are buffered and can support short-circuits or input pulses
without internal interference.

4.4.3.1 Front panel analog outputs (MPC4)

The MPC4 panel is equipped with 6 BNC connectors, intended for the connection of
laboratory instruments:
• Four connectors for raw dynamic signals (AC and DC, if applicable).
These are named RAW OUT 1, RAW OUT 2, RAW OUT 3 and RAW OUT 4.
• Two connectors for processed speed outputs (TTL format).
These are named TACHO OUT 1 and TACHO OUT 2.

4.4.3.2 Rear panel analog outputs (IOC4T)

Buffered raw signals from the sensors (for example, corresponding to vibration) are available
for connection to external racks or other equipment for further analysis such as condition
monitoring.
These differential outputs (RAW 1H and RAW 1L, RAW 2H and RAW 2L, RAW 3H and
RAW 3L, and RAW 4H and RAW 4L) are accessible on the IOC4T card.
The same bandwidth and accuracy specifications apply as per the BNC outputs on the MPC4
panel.

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4.4.4 DC outputs (IOC4T)

Four DC outputs (DC OUT 1, DC OUT 2, DC OUT 3 and DC OUT 4) are available on the
IOC4T card. These can output fully-processed values from single or dual channels.
Jumpers allow each of these outputs to be individually set to provide a current-based or a
voltage-based signal, that is, the specified DC output signal range can be either 4 to 20 mA
or 0 to 10 V. Outputs are configured using the VM600 MPS software. For example, a
4 to 20 mA DC output corresponding to a 0 to 500 µm signal.
The actual value of a DC output can go outside the specified output signal range, depending
on the processed value (signal). For example, if the configured 0 to 500 µm signal actually
goes from −25 to 525 µm, the output signal should remain linear outside of the specified DC
output signal range (up to the circuitry limits of approximately 0 to 23.1 mA and
−2.5 to 11.9 V).

The DC outputs (DC OUT 1, DC OUT 2, DC OUT 3 and DC OUT 4) share a common
reference/return with the discrete signal interface (DSI) inputs (AR, DB and TM). This
common reference/return is known as RET and is available on Connector J3, Terminal 8
(see 9.5 Configuring the four DC outputs and 9.7 DSI control inputs (DB, TM, AR)).

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4.5 Rectification techniques

RMS, Mean, Peak or Peak-Peak rectification is available for acceleration, velocity or
displacement values. The following formulae apply:

1- RMS Value
T
--1-  ( U in ) ⋅ dt
2
U out = U RMS =
T 0

The above value (URMS) can also be scaled to obtain the Scaled Mean and Scaled Peak
values
• Scaled Mean

2
U out = 2 ------- × U RMS = 0.900 × U RMS
π

• Scaled Peak

U out = 2 × U RMS

• Scaled Peak-to-Peak

U out = 2 × 2 × U RMS
2- Mean Value
1 T
U out = ---  U in ⋅ dt
T 0

3- True Peak Value

U out = U in peak

4- True Peak-to-Peak Value

U out = U in peak positive – U in peak negative

Notes
1. The averaging time T can be software-configured in order to maintain a relationship with
the fundamental frequency.
2. True Peak or True Peak-to-Peak values can be calculated for proximity probe measuring
chains.
3. The RMS value is the standard calculation for accelerometer-based measuring chains.

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4.6 Alarm monitoring

4.6.1 Monitoring possibilities

For each measurement (for example, vibration) channel, the MPC4 can compare the
measured value against user-configurable Alert and Danger levels. For each of these, a high
limit and a low limit can be set:
• Danger+, the upper Danger level (for an increasing signal)
• Alert+, the upper Alert level (for an increasing signal)
• Alert−, the lower Alert level (for a decreasing signal)
• Danger−, the lower Danger level (for a decreasing signal).
For each speed channel, the following alarm levels can be set:
• Alert+, the upper Alert level (for an increasing signal)
• Alert−, the lower Alert level (for a decreasing signal).
A time delay (∆t) can be software configured for each Alert or Danger level. The signal level
must be over (or under, in the case of low-level alarms) the alarm level (including the
hysteresis value) for more than ∆t before an alarm is generated.
A hysteresis value can be software configured for each Alert or Danger level.
The alarm events can be latched if required. The alarm latches can be reset either externally
or via the CPUM card (if installed).
The example given in Figure 4-6 illustrates alarm latching when ∆t = 3 seconds.

Signal level

D+ Hysteresis

A+

∆t < 3 s ∆t ≥ 3 s

A−

D−

Time

A+ status
unlatched Normal Alarm Normal

A+ status
latched Normal Alarm Normal
Time

Alarm Reset

Figure 4-6: Illustration of unlatched and latched alarms

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4.6.2 Logical combinations of alarms

The MPS allows logical combinations of alarms to be configured under software control.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

Two types of alarm combination functions exist:

• Basic functions.
• Advanced functions.
Both types of logically combined alarms can be used to set relays.

4.6.2.1 Basic functions

Up to eight basic logic functions can be programmed. Each basic logic function can act on
two or more of the following individual alarms:
• Alert+, Alert−, Danger+, Danger− generated by any of the four individual channels
(that is, Channel 1, Channel 2, Channel 3 and Channel 4)
• Alert+, Alert−, Danger+, Danger− generated by either of the two dual channels
(that is, Channels 1 & 2 and Channels 3 & 4)
• Alert+, Alert− generated by either of the two speed channels
• The Common Alert, the Common Danger and Common OK alarms
• Various hardware and software related alarms (such as Track Lost, DSP Saturation
Error, Input Saturation Error and so on).
The following logic operations can be applied:
• AND
• OR
• Voting logic, for example, any 3 (or more) out of 9 possible alarms.

NOTE: The voting logic operation for the MPC4 is different to that for the AMC8. The
MPC4 uses “more than x” and the AMC8 uses “more than or equal to x”.
Compare with 5.7.2.1 Basic functions.

This is illustrated in the example given in Figure 4-7. In this example:

Basic Function 3 = Speed Ch.1 Alert+ OR Speed Ch.2 Alert+

4.6.2.2 Advanced functions

Up to four advanced logic functions can be programmed. Each advanced logic function can
act on two or more of the eight basic logic functions described above.
The following logic operations can be applied:
• AND
• OR.
In the example given in Figure 4-7:
Advanced Function 1 = Basic Function 1 OR Basic Function 2
= ( Ch.1, Out.1 Alert+ AND Ch.3, Out.1 Alert+ AND Ch.4, Out.2 Alert− )
OR
“More than 1 of 3” ( Ch.1, Out.2 Danger+ ; Ch.2, Out.2 Danger+ ;
Ch.3, Out.2 Danger− )

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Note that the use of advanced logic functions is equivalent to placing brackets in the equation
above.

Ch.1, Out.1 Alert+

Ch.3, Out.1 Alert+ AND Basic Function 1

Ch.4, Out.2 Alert−

OR Advanced Function 1

Ch.1, Out.2 Danger+

Voting
Ch.2, Out.2 Danger+ logic: Basic Function 2
>1 of 3
Ch.3, Out.2 Danger−

AND Advanced Function 2

Speed Ch.1, Alert+

OR Basic Function 3
Speed Ch.2, Alert+

Figure 4-7: Example showing basic and advanced logic functions

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4.6.3 Adaptive monitoring

This technique allows the Alert and Danger levels to be dynamically set as a function of an
adaptive parameter. The adaptive parameter can be:
• Speed, as measured on one of the two “local” speed inputs (that is, from the card pair in
question).
• Any other control/process parameter such as load or water head measured on one of the
two “local” speed inputs (that is, from the card pair in question), for example, by using an
external current loop or voltage to frequency converter device.

NOTE: When using an external analog signal to frequency converter device, the
measured “speed” is proportional to the control/process parameter to be used
for the adaptive monitoring.

Adaptive monitoring is particularly useful for run-ups and coast-downs where the adaptive
parameter is speed.

The alarm levels (Alert and Danger) are multiplied by a coefficient depending on the
parameter (in this case, speed), as illustrated in Figure 4-8. For example, for the nominal
speed of the machine (after s6), this coefficient is equal to 1.0. However, in the speed range
s1 < speed < s2, the Alert and Danger levels are multiplied by 1.2 in order to avoid a machine
shutdown when the machine crosses its first critical speed (see Figure 4-8).

NOTE: Multiplier coefficients are always applied to Danger+ and Alarm+ (high) levels.
Multiplier coefficients are applied to Danger− and Alarm− (low) levels only when
their values are negative. When they are positive and the multiplier coefficient is
not equal to 1.0, both Danger− and Alarm− are disabled.

Up to 10 parameter ranges (for example, speed) can be defined (s1, s2 and so on, in
Figure 4-8).
Up to 10 multiplier coefficients can be configured (for example, 0.5, 0.8, 1.2 and so on, in
Figure 4-8).
These coefficients can be chosen in the range 0.1 to 5.0, in steps of 0.1.

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Vibration level

1.3
1.2

1.0

0.8

0.5

0.3
0.2

Speed
s1 s2 s3 s4 s5 s6

Figure 4-8: Illustration of adaptive monitoring technique

In order to use the Adaptive Monitoring function, it must first be activated using the VM600
MPSx software (using the Adaptive Monitoring property sheet of the relevant Processed
Output tab for the appropriate Processing Channel node).

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4.6.4 Direct Trip Multiply

NOTE: The safety version of the MPC4 card (MPC4SIL) does not does not support the trip
multiply (TM) function.

This is a simplified version of adaptive monitoring. In this case there are only two different
level coefficients, one of which is 1.0. The other coefficient can be chosen in the range 0.1 to
5.0, in steps of 0.1. This is illustrated in Figure 4-9.
The level coefficient is switched by an external signal applied to the Trip Multiply (TM) input
on the IOC4T card. When this input is held low (0V), the scaling coefficient is effective. When
it is floating, a default scaling factor of 1.0 is used.

NOTE: The level coefficient is always applied to Danger+ and Alarm+ (high) levels.
The level coefficient is applied to Danger− and Alarm− (low) levels only when their
values are negative. When they are positive and the level coefficient is not equal
to 1.0, both Danger− and Alarm− are disabled.

Vibration level

1.3 Alarm level

1.0

Speed
s1

Figure 4-9: Illustration of direct Trip Multiply technique

In order to use the Trip Multiply function, it must first be activated using the VM600 MPSx
software (using the Adaptive Monitoring property sheet of the relevant Processed Output tab
for the appropriate Processing Channel node).

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4.6.5 Danger Bypass function

NOTE: The safety version of the MPC4 card (MPC4SIL) does not does not support the
danger bypass (DB) function.

This function allows Danger relays to be inhibited, even when a Danger condition occurs. The
Danger information remains available to the MPS, but the Danger relays are de-activated to
prevent the monitored machine from being shut down.
The Danger conditions inhibited are the following individual alarms:
• The Danger+ and Danger− generated by the four individual measurement channels.
• The Danger+ and Danger− generated by the two dual measurement channels.
The outputs of any logic functions using these Danger conditions as inputs will be affected by
the use of the Danger Bypass function as the individual alarms are set to inactive for the
duration of a Danger Bypass.
The Danger Bypass function is activated when a low (0V) external signal is applied to the
Danger Bypass (DB) input on the IOC4T card.
See also 4.6.6 Channel inhibit function.

4.6.6 Channel inhibit function

NOTE: The safety version of the MPC4 card (MPC4SIL) does not does not support the
channel inhibit function.

The channel inhibit function allows individual MPC4 channels (measurement and speed) to
be temporarily bypassed, that is, it temporarily inhibits the protection offered by any
associated relays.
The channel inhibit function is intended to allow a component in a measurement system
front-end, such as a sensor/transducer or signal conditioner, to be replaced for an individual
channel while the other machinery monitoring channels and functions continue to operate as
normal.
This allows the machinery being monitored to continue to operate (if the protection offered by
the other machinery monitoring channels and functions is adequate). It also allows any
control system using the relays to avoid false trips during such maintenance activity.

When the channel inhibit function is activated for an MPC4 channel:

• The channel continues its processing as per its configuration but inhibits the protection
offered by any associated relays.
This allows the effect of any changes to the measurement system front-end to be
observed. In this way, it can also be ensured that there are no ongoing alarm conditions
before the de-activation of the channel inhibit.
• The sensor power supply output for the channel remains turned on, if enabled.
• Any DC output functionality associated with the channel continues, if enabled.
• The following flags (bits) for the channel processing are forced to a known state:
• For a measurement channel, the error bit (Err), OK system check (SOK), alarm (A+,
A−) and danger (D+, D−) flags are all forced to a normal state.
The sensor bypassed (SBP) flag and the invalid output flags are also set active (=1).
• For a speed channel, the error bit (Err), OK system check (SOK) and alarm (A+, A−)
flags are all forced to a normal state.
The sensor bypassed (SBP) flag and the invalid output flags are also set active (=1).

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NOTE: The MPS1 and MPS2 software packages use the SBP (sensor bypassed) flag
to refer to the channel inhibit function.

• Any processing channels that depend on the channel are automatically bypassed.
For example, if a speed channel is inhibited, any processing that uses the speed channel
as an input will also be inhibited, in addition to the speed processing itself.
• The measurement channel’s status indicator (LED) on the panel of the MPC4 card slowly
blinks green for the duration of the channel inhibit (approximately once per second).

NOTE: For a speed channel, the channel inhibit function affects “local” speed signals only.
When channel inhibit is used with a “local” speed signal, the speed signal is still
shared remotely using the Tacho Bus, if configured (see 3.4.2 Tacho Bus).
The channel inhibit function cannot be used with “remote” speed signals, that is,
“remote” speed signals cannot be temporarily bypassed using the channel inhibit
function.

When the channel inhibit function is de-activated for an MPC4 channel, the card:
• Waits 2 seconds for signal stabilisation, in addition to the OK system check recovery
time. This gives a total recovery time of 2.1 seconds for MPC4 cards running firmware
version 070 or earlier and of 12 seconds for MPC4 cards running firmware version 071
or later.(see 4.7.1 OK system checking and Figure 4-10).
• Resets (clears) any latched alarms.
• Stops forcing the flags for the channel processing to a normal state, so that the true
status of the machinery monitoring system is returned again. The sensor bypassed
(SBP) flag is also set inactive (=0).
• The channel’s status indicator (LED) on the panel of the MPC4 card indicates the
operational status of the card.

NOTE: When an MPC4 card is configured (using the VM600 MPS software), the channel
inhibit function is automatically de-activated for any channels where it is active.

The status of the channel inhibit function for the individual channels of an MPC4 card can be
used as an input to a basic function (see 4.6.2 Logical combinations of alarms).
See also 4.6.5 Danger Bypass function and 9.8 Channel inhibit function.

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System self-checks

4.7 System self-checks

4.7.1 OK system checking

The OK System monitors the input signal from the sensor in order to verify if the sensor is
connected and operating normally. To do this, the DC signal level is compared against two
user-configurable OK levels: a minimum normal level and a maximum normal level. This is
shown in Figure 4-10.

DC signal
level Voltage sensor connection short-circuit or
current sensor connection open-circuit

Max.
(Upper OK Level)

Normal
Sensor OK
tolerance

Min.
(Lower OK Level)

Time
Voltage sensor connection open-circuit or
Sensor current sensor connection short-circuit
OK
Open

Grounded
Time
Confirmation Response Recovery time:
time: time: 100 ms for MPC4 versions 070 or earlier.
<250 ms 100 ms 10 s for MPC4 versions 071 or later.
(Except for MPC4 version 072, a “custom”
version, which is 60 s.)

Figure 4-10: Maximum and minimum signal levels allowed by the OK System

Any problem with the transducer and/or signal conditioner or connecting cable that causes
the signal to deviate beyond these OK levels will cause an individual alarm for the input
channel (corresponding to the individual Sensor OK bit) and a common alarm for the MPC4
card (corresponding to the common Sensor OK bit).
As shown in Figure 4-10:
• The “confirmation time” is a fixed firmware time delay used so that only an input signal
that is outside the configured OK levels for a time period greater than 250 ms is detected
as an OK system failure. This is used to ensure that noise (“spikes”) on the DC signal
level are not accidentally recognised as failures.
• The “response time” is the maximum time delay from the time that an OK system failure
is detected until the corresponding alarms are set (Sensor OK bit for the input channel
and Common Sensor OK bit alarm for the MPC4 card). The actual time delay depends
on the processor load of the card but is less than 100 ms.

NOTE: The behaviour of the OK system checking is the same above and below the
configured OK levels.

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System self-checks

In practice, it can take up to 350 ms (“confirmation time” + “response time”) after an input
signal goes outside the configured OK levels before it is confirmed and acted upon in a
VM600 system as an OK System failure.
When there is an OK System failure on an MPC4 card:
• For the channel in question, the corresponding status indicator (LED) on the panel of the
card blinks green and an OK level alarm (corresponding to the individual Sensor OK bit)
is signalled.
• For the card in question, a common OK level alarm (corresponding to the common
Sensor OK bit) is signalled.
For example, these can be used to switch a relay on the IOC4T or RLC16 card.

NOTE: Any alarms (A+, D+ and so on) associated with the corresponding monitoring
channel are not inhibited, but remain active.

Most types of monitoring can be performed, however, for passive sensors providing a
voltage-based output (such as velocimeters), only open circuits can be monitored.

4.7.2 Built-in test equipment (BITE)

The MPC4 features built-in test equipment (BITE) which provides information about the
operational state of the system:
1- Continuous checks (watchdog)
A software watchdog informs the CPUM (if installed in rack) that the MPC4 card is halted.
2- Power-up test
The MPC4 hardware (such as the memory and timers) is tested on power-up. Any failure
will cause the MPC4 to be halted.

4.7.3 Overload checking

Overload protection is provided for each channel. Errors are flagged and can be read using
the VM600 MPSx software.

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MPC4 power-up sequence

4.8 MPC4 power-up sequence

The MPC4 card's power-up sequence is initiated by either of the following events:
• The MPC4 being inserted into the ABE04x rack when the latter is powered up (that is,
the "live insertion" situation).
• Power being re-established after a power-down or a power failure.

4.8.1 Power-up after live insertion

A +5 VDC pre-charge supply is used to enable live insertion of MPC4 cards. This voltage is
supplied to the MPC4 from the system backplane. It is passed to the MPC4 module via three
pins on connector P1 (see Figure 3-3). These pins are slightly longer than the other VME bus
connector pins (ABE04x only).
When a module is inserted into a MPS rack that is powered up, these longer pins make
contact first (typically 200 ms before the other pins). During this time, the +5 VDC pre-charge
supply is used to power up all the +5 VDC parts on the module. This ensures that when the
bus driver makes contact with the running VME bus, the circuitry is already at approximately
the correct voltage. In this way no glitches are produced on the VME bus power, address or
data pins.
Once the rest of the pins (including the standard +5 VDC supply) make contact, no further
power is drawn from the +5 VDC pre-charge supply.

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Operation of LEDs on MPC4 panel

4.9 Operation of LEDs on MPC4 panel

4.9.1 Global DIAG/STATUS indicator LED for the card

This multi-function, multi-colour LED is used for the following purposes:
• To indicate normal operation.
• To indicate the activation of special functions (Trip Multiply and Danger Bypass).
• To indicate an MPC4 hardware or software failure.
Table 4-1 provides detailed information on the behaviour of the MPC4 DIAG/STATUS LED
for the card.

NOTE: In Table 4-1, events are presented in decreasing order of priority for an
MPC4 / IOC4T card pair (that is, “Red blinking” has the highest priority).

Table 4-1: Behaviour of DIAG/STATUS LED for the card

Behaviour of card
Event(s)
DIAG/STATUS LED

MPC4 hardware failure. This includes:

* Power supply fail
* DSP RAM, DPRAM and/or FLASH memory fail
Red blinking
* Acquisition watchdog fail and/or software common task fail
* Internal version incompatibility
(monitoring not running)

MPC4 powered up but not yet configured

Red blinking
(monitoring not running)

Configuration error or IOC4T slot number mismatch

Yellow blinking
(monitoring not running)

MPC4 configured but in stabilisation phase

Green blinking
(monitoring not running)

At least one channel has an input signal error. This includes:

* Vibration input saturation error
* Vibration out of common mode range
Green blinking
* Speed out of limit
* Speed out of common mode range
(monitoring running)

At least one channel has an input signal error. This includes:

* Vibration out of scale
* Tracking out of range
Yellow blinking
* Track lost
* DSP overload
(monitoring running)

Red (continuous) Danger Bypass (DB) function active

Yellow (continuous) Trip Multiply (TM) function active

Normal card operation – MPC4 configuration is running correctly with

Green (continuous)
no alarms and no errors

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Operation of LEDs on MPC4 panel

4.9.2 Individual status indicator LEDs for measurement channels

Table 4-2 provides detailed information on the behaviour of the MPC4 status indicator LEDs
for the four individual measurement channels.

NOTE: In Table 4-2, events are presented in decreasing order of priority for an
MPC4 / IOC4T card pair (that is, “Off” has the highest priority).

Table 4-2: Behaviour of status indicator LEDs

for individual measurement channels

Behaviour of
measurement channel Event(s)
status LED

Channel is not configured

Off or
MPC4 configuration is not running

Signal input to the channel is not valid

Green blinking
(either the lower or the upper “OK Level” has been exceeded)

Green blinking slowly

(approximately once per The channel inhibit function is activated for the channel
second)

Note: Applies to dual-channel processing only.

When there is an active dual-channel processing alarm, the status
indicator LED for both channels will blink red at the same time.
For Danger level alarms configured as not latched: indicates that
a signal is below the lower Danger level (D−) or above the upper
Danger level (D+). That is, there is a currently active processing alarm.
Red blinking
For Danger level alarms configured as latched: indicates that
a signal was below the lower Danger level (D−) or above the upper
Danger level (D+) and was latched but has not yet been reset, or that a
signal is below the lower Danger level or above the upper Danger level.
That is, either there was a previously active processing alarm that has
not been reset or there is a currently active processing alarm.

Note: Applies to single-channel processing only.

For Danger level alarms configured as not latched: indicates that
a signal is below the lower Danger level (D−) or above the upper
Danger level (D+). That is, there is a currently active processing alarm.
Red (continuous) For Danger level alarms configured as latched: indicates that
a signal was below the lower Danger level (D−) or above the upper
Danger level (D+) and was latched but has not yet been reset, or that a
signal is below the lower Danger level or above the upper Danger level.
That is, either there was a previously active processing alarm that has
not been reset or there is a currently active processing alarm.

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Operation of LEDs on MPC4 panel

Table 4-2: Behaviour of status indicator LEDs

for individual measurement channels (continued)

Behaviour of
measurement channel Event(s)
status LED

Note: Applies to dual-channel processing only.

When there is an active dual-channel processing alarm, the status
indicator LED for both channels will blink yellow at the same time.
For Alert level alarms configured as not latched: indicates that
a signal is below the lower Alert level (A−) or above the upper
Alert level (A+). That is, there is a currently active processing alarm.
Yellow blinking
For Alert level alarms configured as latched: indicates that
a signal was below the lower Alert level (A−) or above the upper
Alert level (A+) and was latched but has not yet been reset, or that a
signal is below the lower Alert level or above the upper Alert level. That
is, either there was a previously active processing alarm that has not
been reset or there is a currently active processing alarm.

Note: Applies to single-channel processing only.

For Alert level alarms configured as not latched: indicates that
a signal is below the lower Alert level (A−) or above the upper
Alert level (A+). That is, there is a currently active processing alarm.
Yellow (continuous) For Alert level alarms configured as latched: indicates that
a signal was below the lower Alert level (A−) or above the upper
Alert level (A+) and was latched but has not yet been reset, or that a
signal is below the lower Alert level or above the upper Alert level.
That is, either there was a previously active processing alarm that has
not been reset or there is a currently active processing alarm.

Normal channel operation – channel is configured and signal input is

Green (continuous) valid (not exceeding lower or upper “OK Levels”). That is, there are no
active single-channel processing or dual-channel processing alarms.

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Operation of LEDs on MPC4 panel

4.9.3 Individual status indicator LEDs for speed channels

Table 4-3 provides detailed information on the behaviour of the MPC4 status indicator LEDs
for the two individual speed (Tacho) channels.

NOTE: In Table 4-3, events are presented in decreasing order of priority for an
MPC4 / IOC4T card pair (that is, “Off” has the highest priority).

Table 4-3: Behaviour of status indicator LEDs

for individual speed (Tacho) channels

Behaviour of
speed channel Event(s)
status LED

Channel is not configured

Off or
MPC4 configuration is not running

Signal input to the channel is not valid

Green blinking
(either the lower or the upper “OK Level” has been exceeded)

Green blinking slowly

(approximately once per The channel inhibit function is activated for the channel
second)

For Alert level alarms configured as not latched: indicates that

a signal is below the lower Alert level (A−) or above the upper Alert
level (A+). That is, there is a currently active processing alarm.
For Alert level alarms configured as latched: indicates that
Yellow (continuous) a signal was below the lower Alert level (A−) or above the upper Alert
level (A+) and was latched but has not yet been reset, or that a signal is
below the lower Alert level or above the upper Alert level.
That is, either there was a previously active processing alarm that has
not been reset or there is a currently active processing alarm.

Normal channel operation – channel is configured and signal input is

Green (continuous) valid (not exceeding lower or upper “OK Levels”). That is, there are no
active processing alarms.

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Operation of LEDs on MPC4 panel

THIS PAGE INTENTIONALLY LEFT BLANK

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 AMC8 / IOC8T CARD PAIR
General block diagram

5 AMC8 / IOC8T CARD PAIR

5.1 General block diagram

A block diagram of the AMC8, IOC8T, RLC16 and IRC4 cards is shown in Figure 5-1. This
shows schematically the backplane, which physically divides the ABE04x rack into a front
card cage and a rear card cage.
The AMC8 (shown on the left of the diagram) is mounted in the front card cage. This card
effects the signal processing functions for the MPS. Its panel contains an LED indicator
(DIAG/STATUS) showing the hardware status of the AMC8 / IOC8T card pair. Additional
LED indicators are present to provide information on the status of each individual channel
(such as signal valid or the presence of alarms). The panel also has a 9-pin D-sub connector
for configuring an AMC8 card used in a stand-alone rack, that is, a rack not containing a
CPUM card.
Each AMC8 card is necessarily connected (via the backplane) to an IOC8T input/output card
mounted in the rear card cage. The IOC8T card's panel (rear of rack) has terminals for
connecting the signal transmission lines coming from measurement sensors, such as RTD
devices, thermocouples and flow rate detectors). Other terminals are used to output
processed signal values (4 to 20 mA, with 0 to 10 V optionally available).
The IOC8T contains 4 local relays with outputs available on a screw terminal strip. In
applications needing more than the 4 relays provided by the IOC8T, an RLC16 relay card or
an IRC4 intelligent relay card can be installed in the rack.
The RLC16 card contains 16 relays and has a terminal strip with 48 screw terminals (3 strips
each having 16 terminals).
The IRC4 card contains 8 relays that can be combined as 4 DPDT or 8 SPDT and has a
terminal strip with 32 screw terminals (2 strips each having 16 terminals).

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 5-2

General block diagram

AMC8 / IOC8T CARD PAIR
Rack backplane

terminal strip
8x
IRC4 (Rear card cage) Relays

2 x screw

(J1, J2)
6
Intelligent relay card with 4 DPDT or 8 SPDT DSI

terminal strip
RLC16 (Rear card cage)

(J1, J2, J3)

16

3 x screw
Relays
Relay card with 16 change-over contacts

Channel 1

EMC prot.
Isolated Analog to Sensor 5
VME interface + digital type
interface floating PS converter switching
(Monitoring, Meas. sensors

2 x cage clamp
1 configuration) “I”: Current O/P

terminals
DIAG/ Micro-

(J1, J2)
“H”: Signal I/P
STATUS controller (+ve)
DSP ADC
Channel 8 (+RAM (math interface
Channel 2 “R”: 4 to 20 mA
status +Flash) coprocessor) signal I/P
Channel 3 “C”: Common I/P
“S”: Shield

Channel 8

OC Bus
9-pin
D-sub

terminal strip
VM600 MPS hardware manual (standard version) MAMPS-HW/E

connector Open
4 Local 4x

1 x screw
(RS-232) collector
Raw line 1 relays RL1, RL2,
1 drivers
selection RL3 and RL4

(J4)
(JS)

EMC protection
Switch 2
Industry IP Bus Industry DB
AMC8 input

1 x cage clamp
Pack (IP) Pack (IP) AR
panel decoder

terminal
interface Interface

(J3)
Tacho Bus
8-channel DC OUT
8
VME bus

Raw Bus

DAC with 4 to 20 mA
(optionally
AMC8 (Front card cage) IOC8T (Rear card cage) U/I conv.
0 to 10 V)
Edition 17 - February 2018

Abbreviations:
ADC = Analog-to-digital converter, AR = Alarm Reset, DAC = Digital-to-analog converter, DB = Danger Bypass, DSP = Digital signal processor, EMC = Electromagnetic compatibility,
IP = Industry pack, I/P = Input, JS = Jumper selectable, OC = Open Collector, O/P = Output, PS = Power supply, SPDT = Single-pole double-throw, SW = Software,
U/I conv. = Voltage-to-current converter, VME = VERSAbus module eurocard, +ve = Positive.

Figure 5-1: Block diagram of AMC8, IOC8T, RLC16 and IRC4 cards
 AMC8 / IOC8T CARD PAIR
Overview of AMC8 / IOC8T operation

5.2 Overview of AMC8 / IOC8T operation

The AMC8 implements a variety of signal processing and monitoring functions, each of which
requires real-time continuous processing of the inputs.
The block diagram in Figure 5-2 summarises the operation of the AMC8 card.

Remote Channel #1

Remote Channel #2

Sensor 1 Alarms / OK
Sensor Signal
signal processing / Processed value
conditioning monitoring
To (a)

Sensor 2 Sensor
Alarms / OK
Signal
signal Processed value
processing /
conditioning monitoring To (b)

Idem for
Sensors 3 to 7 VME
Signal routing

Sensor 8 Alarms / OK RS-232

Sensor Signal
signal processing / Processed value
conditioning monitoring IOC

(a) (b)

Alarms
(1) Processed value

Alarms
“Multi- (2) Processed value
channel”
processing /
monitoring Alarms
(4 channels)
(3) Processed value

Alarms / OK
(4) Processed value

Figure 5-2: Operation of AMC8 / IOC8T card pair

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Overview of AMC8 / IOC8T operation

5.2.1 Sensor signal conditioning

This block (see Figure 5-2) acts as a signal interface and is used to:
• Acquire a signal from the connected sensor.
• Check for signal overload (independently of the OK line check).
The AMC8 card does not have the ability to power external measuring devices. Where
necessary, an external power supply must be used.
See 5.3 Inputs and outputs.

5.2.2 Signal routing

This block (see Figure 5-2) is used only if cold-junction compensation (CJC) is required for
channels having a thermocouple connected.
The block enables a “cold junction” (CJ) temperature signal (generally obtained using an
RTD) to be routed to another channel on the card. One of two remote CJ signals can also be
selected. These come from other cards in the rack over Tacho Bus lines 7 and 8.

5.2.3 Signal processing and monitoring

This block (see Figure 5-2) assures the following:
1- Definition of “multi-channels”
Based on the eight single channels, four “multi-channels” can be defined. These can
group between two and eight single channels and perform various mathematical
operations on them, such as obtain the minimum, maximum or average value. The
difference between two individual channels can also be calculated.
See 5.4 Multi-channel processing functions.
2- Selection of the time-domain processing function
The functions include the following: direct output (bypass), average over a period of time,
maximum value over a period of time, minimum value over a period of time.
See 5.5 Time-domain processing functions.
3- Linearity compensation
Linear and non-linear sensor compensation can be applied for thermocouples and RTD
devices.
See 5.6 Linearity compensation.
4- Monitoring
For single channels and “multi-channels”, the signal values (suitably processed and
compensated) are monitored and alarms generated if the thresholds are exceeded.
These alarms can be used to set relays.
Logical combinations of alarms can also be configured.
See 5.7 Alarm monitoring.
5- Sensor OK Level Detection
This function monitors the OK levels for the sensor to check for hardware problems (for
example, faulty sensor or signal conditioner, or defective transmission line).
See 5.8 System self-checks.

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Inputs and outputs

5.3 Inputs and outputs

5.3.1 Measurement signal inputs

The following sensor types can be used with the AMC8 / IOC8T card pair:
• Thermocouples (type E, type J, type K, type T or user defined)
• RTD devices (Pt100, Cu10, Ni120 or user defined)
• Other measurement systems (for example, flow rate detectors or power indicators)
providing a quasi-static signal. This can be a current-based signal (typically 4 to 20 mA,
but an extended range of 0 to 25 mA can also be processed) or a voltage based signal
(0 to 10 V).
RTD devices can be connected in a 2-wire, 3-wire or 4-wire arrangement.
A 50 Ω measuring resistor is used for systems providing a current-based signal. The input is
protected by a self-resetting 50 mA fuse.
For voltage-based signals, only unipolar signals can be processed. Negative signals can be
measured simply by reversing the polarity of the input wires.
Hardware associated with the sensors such as power supplies, signal conditioners, optional
safety barriers or galvanic separations are not implemented within the MPS rack, but
externally.

NOTE: See 10 Configuration of AMC8 / IOC8T cards for further information on connecting
sensors.

5.3.2 DC outputs
Eight DC outputs (DC OUT 1 to DC OUT 8) are available on the IOC8T card. These can
output fully-processed values from single channels or multi-channels.
By default, these outputs provide current-based signals. However, solder bridges can be
configured to provide voltage-based signals on all eight outputs (which must be set in the
factory). That is, the specified DC output signal range can be either 4 to 20 mA or 0 to 10 V.

NOTE: The solder bridges on the IOC8T card select either current or voltage for all
outputs. It is not possible to have a mixture of current-based and voltage-based
outputs.

Outputs are configured using the VM600 MPS software. For example, a 4 to 20 mA output
corresponding to a 25 to 100°C signal.
The actual value of a DC output can go outside the specified output signal range, depending
on the processed value (signal). For example, if the configured 25 to 100°C signal actually
goes from 20 to 105°C, the output signal should remain linear outside of the specified DC
output signal range (up to the circuitry limits of approximately 0 to 25 mA and 0 to 13 V).

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Multi-channel processing functions

5.4 Multi-channel processing functions

Four “multi-channel” processing functions are available. Each is able to process the following
functions on the 8 single channels:
• Minimum of 2 to 8 values
• Maximum of 2 to 8 values
• Average of 2 to 8 values
• Difference between two values.

5.5 Time-domain processing functions

These functions are somewhat analogous to the rectifier functions available for the
MPC4 / IOC4T card pair.
A time-domain processing function can be applied to a single channel or a “multi-channel”.
The following possibilities exist:
• Direct output (bypass)
• Average over a period of time
• Maximum value over a period of time
• Minimum value over a period of time.
The time period can be set under software control to a value between 0.1 and 10.0 seconds.
The output is updated at this rate.

5.6 Linearity compensation

The VM600 MPS software allows linearity compensation for thermocouples and RTD
devices.
For linear compensation, an offset and sensitivity value can be defined.
For non-linear compensation, a table of polynomial values can be entered or downloaded.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

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Alarm monitoring

5.7 Alarm monitoring

5.7.1 Monitoring possibilities

For each single channel or “multi-channel”, the AMC8 can compare the measured value
against user-configurable Alert and Danger levels. For each of these, a high limit and a low
limit can be set:
• Danger+, the upper Danger level (for an increasing signal)
• Alert+, the upper Alert level (for an increasing signal)
• Alert−, the lower Alert level (for a decreasing signal)
• Danger−, the lower Danger level (for a decreasing signal).
A time delay (∆t) can be software configured for each Alert or Danger level. The signal level
must be over (or under, in the case of low-level alarms) the alarm level (including the
hysteresis value) for more than ∆t before an alarm is generated.
A hysteresis value can be software configured for each Alert or Danger level.
The alarm events can be latched if required. The alarm latches can be reset either externally
or via the CPUM card (if installed).
The example given in Figure 5-3 illustrates alarm latching when ∆t = 3 seconds.

Signal level

D+ Hysteresis

A+

∆t < 3 s ∆t ≥ 3 s
A−

D−

Time

A+ status
unlatched Normal Alarm Normal

A+ status
latched Normal Alarm Normal
Time

Alarm Reset

Figure 5-3: Illustration of unlatched and latched alarms

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Alarm monitoring

5.7.2 Logical combinations of alarms

The MPS allows logical combinations of alarms to be configured under software control.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

Two types of alarm combination functions exist:

• Basic functions
• Advanced functions.
Both types of logically combined alarms can be used to set relays.

5.7.2.1 Basic functions

Up to 16 basic logic functions can be programmed. Each basic logic function can act on two
or more of the following individual alarms:
• Alert+, Alert−, Danger+, Danger− generated by any of the eight single channels
(that is, Channel 1 to Channel 8)
• Alert+, Alert−, Danger+, Danger− generated by any of the four “multi-channels”
(that is, Multi-Channel 1 to Multi-Channel 4)
• Global Channel OK failure
• Various hardware-related and software-related alarms and statuses (for example, AMC
Configuration Not Running, Status Latched, Danger Bypass, Alarm Reset).
The following logic operations can be applied:
• AND
• OR
• Voting logic, for example, any 3 (or more) out of 9 possible alarms.

NOTE: The voting logic operation for the AMC8 is different to that for the MPC4. The
AMC8 uses “more than or equal to x” and the MPC4 uses “more than x”.
Compare with 4.6.2.1 Basic functions.

This is illustrated in the example given in Figure 5-4. In this example:

Basic Function 1 = Channel 5 Alert− AND Channel 6 Alert−
Basic Function 2 = Multi-Channel 1 Alert+ AND Channel 4 Alert+
In this example, Multi-Channel 1 is obtained from calculating the
Average of ( Channel 1, Channel 2 and Channel 3 ).
Basic Function 3 = Negation of Channel 7 Danger+
(also known as NOT Channel 7 Danger+)

5.7.2.2 Advanced functions

Up to 8 advanced logic functions can be programmed. Each advanced logic function can act
on two or more of the 16 basic logic functions described above.
The following logic operations can be applied:
• AND
• OR
• Voting logic (for example, any 2 of 3).

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Alarm monitoring

In the example given in Figure 5-4:

Advanced Function 1 = Basic Function 1 OR Basic Function 2
= ( Channel 5 Alert− AND Channel 6 Alert− )
OR
( Multi-Channel 1 Alert+ AND Channel 4 Alert+ )
Note that the use of advanced logic functions is equivalent to placing brackets in the equation
above.
Advanced Function 2 =
“Any 2 or more of 3” ( Basic Function 1 ; Basic Function 2 ; Basic Function 3 )

Chan 5
Alert− Basic
AND Function 1
Chan 6
Alert−
Multi-
Channel 1 Advanced
OR Function 1
Chan 1
Alert+
Chan 2 AVG
Chan 3

Basic
AND Function 2
Chan 4
Alert+
Voting Advanced
logic: Function 2
≥2 of 3
Chan 7 Basic
NEG Function 3
Danger+

Figure 5-4: Example showing basic and advanced logic functions, as well as
“multi-channel” usage

5.7.3 Danger Bypass function

This function allows Danger relays to be inhibited, even when a Danger condition occurs. The
Danger information remains available to the MPS, but the Danger relays are de-activated to
prevent the monitored machine from being shut down.
The Danger conditions inhibited are the following individual alarms:
• The Danger+ and Danger− generated by the eight individual measurement channels.
• The Danger+ and Danger− generated by the four multi-channel measurement channels.
The outputs of any logic functions using these Danger conditions as inputs will be affected by
the use of the Danger Bypass function as the individual alarms are set to inactive for the
duration of a Danger Bypass.
The Danger Bypass function is activated when a low (0 V) external signal is applied to the
Danger Bypass input on the IOC8T card.
See also 5.7.4 Channel inhibit function.

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Alarm monitoring

5.7.4 Channel inhibit function

The channel inhibit function allows individual AMC8 channels to be temporarily bypassed,
that is, it temporarily inhibits the protection offered by any associated relays.
The channel inhibit function is intended to allow a component in a measurement system
front-end, such as a sensor/transducer or signal conditioner, to be replaced for an individual
channel while the other machinery monitoring channels and functions continue to operate as
normal.
This allows the machinery being monitored to continue to operate (if the protection offered by
the other machinery monitoring channels and functions is adequate). It also allows any
control system using the relays to avoid false trips during such maintenance activity.

When the channel inhibit function is activated for an AMC8 channel:

• The channel continues its processing as per its configuration but inhibits the protection
offered by any associated relays.
This allows the effect of any changes to the measurement system front-end to be
observed. In this way, it can also be ensured that there are no ongoing alarm conditions
before the de-activation of the channel inhibit.
• Any DC output functionality associated with the channel continues, if enabled.
• The following flags (bits) for the channel processing are forced to a known state:
• The error bit (Err), OK system check (SOK), alarm (A+, A−) and danger (D+, D−)
flags are all forced to a normal state (which is false, that is =0).
The sensor bypassed (SBP) flag and the global channel OK fail flags are also set
active.

NOTE: The VM600 MPS1 and VM600 MPS2 software packages use the SBP (sensor
bypassed) flag to refer to the channel inhibit function.

• Any processing channels that depend on the channel are automatically bypassed.
• The channel’s status indicator (LED) on the panel of the AMC8 card slowly blinks green
for the duration of the channel inhibit (approximately once per second).

When the channel inhibit function is de-activated for an AMC8 channel, the card:
• Waits 12 seconds for signal stabilisation (total recovery time).
• Resets (clears) any latched alarms.
• Stops forcing the flags for the channel processing to a normal state, so that the true
status of the machinery monitoring system is returned again. The sensor bypassed
(SBP) flag is also set inactive.

NOTE: When an AMC8 card is configured (using the VM600 MPS software), the channel
inhibit function is automatically de-activated for any channels where it is active.

The status of the channel inhibit function for the individual channels of an AMC8 card can be
used as an input to a basic function (see 5.7.2 Logical combinations of alarms).
Se also 5.7.3 Danger Bypass function and 10.6 Channel inhibit function.

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System self-checks

5.8 System self-checks

5.8.1 OK system checking

The OK System monitors the input signal from the sensor in order to verify if the sensor is
connected and operating normally. To do this, the DC signal level is compared against two
user-configurable OK levels: a minimum normal level and a maximum normal level. This is
shown in Figure 5-5.

DC signal
level Voltage sensor connection short-circuit or
current sensor connection open-circuit

Max.
(Upper OK Level)

Normal
Sensor OK
tolerance

Min.
(Lower OK Level)

Time
Voltage sensor connection open-circuit or
Channel current sensor connection short-circuit
OK
Open

Grounded
Time
∆t < 250 ms 100 ms 100 ms
Confirmation Response Recovery time
time time

Figure 5-5: Maximum and minimum signal levels allowed by the OK System

Any problem with the transducer and/or signal conditioner or connecting cable that causes
the signal to deviate beyond these OK levels will cause an individual alarm for the input
channel (corresponding to the individual Global Channel OK bit).

As shown in Figure 5-5:

• The “confirmation time” is a fixed firmware time delay used so that only an input signal
that is outside the configured OK levels for a time period greater than 250 ms is detected
as an OK system failure. This is used to ensure that noise (“spikes”) on the DC signal
level are not accidentally recognised as failures.
• The “response time” is the maximum time delay from the time that an OK system failure
is detected until the corresponding alarms are set (Global Channel OK bit for the input
channel). The actual time delay depends on the processor load of the card but is less
than 100 ms.

NOTE: The behaviour of the OK system checking is the same above and below the
configured OK levels.

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System self-checks

In practice, it can take up to 350 ms (“confirmation time” + “response time”) after an input
signal goes outside the configured OK levels before it is confirmed and acted upon in a
VM600 system as an OK System failure.

When there is an OK System failure on an AMC8 card:

• For the channel in question, the corresponding status indicator (LED) on the panel of the
card blinks green and an OK level alarm (corresponding to the individual
Global Channel OK bit) is signalled.
For example, this can be used to switch a relay on the IOC4T or RLC16 card.

NOTE: Any alarms (A+, D+ and so on) associated with the corresponding monitoring
channel are not inhibited, but remain active.

The following types of monitoring can be performed:

1- RTD devices:
Detection of open circuits and short circuits.
2- Thermocouples:
Detection of open circuits.
3- Voltage-based and current-based signals:
Detection of open circuits and short circuits.

5.8.2 Built-in self test (BIST)

The AMC8 and IOC8T feature built-in self test (BIST) circuitry which provides information
about the operational state of the system. There are basically three types:
1- Global Board BIST
This tests the IOC as a whole and includes a logic watchdog.
2- Channel BIST
This checks each channel to establish whether:
• The shield (S) terminal is incorrectly connected to the sensor (S) terminal
• The linear regulator voltage is correct
• The DC-DC output voltage is correct.
3- Sensor-Specific BIST
Depending on whether a thermocouple, RTD device, voltage-based sensor or
current-based sensor is connected, performs various tests such as:
• Current source checks
• Line checks (to monitor for broken lines)
• Line resistance mismatch (for 3-wire RTD measurements)
• Correct setting of jumper J805.
Errors detected by the BIST are used to set flags that can then be used by the VM600 MPS
software to switch relays and so on.

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AMC8 power-up sequence

5.9 AMC8 power-up sequence

The AMC8 card's power-up sequence is initiated by either of the following events:
• The AMC8 being inserted into the ABE04x rack when the latter is powered up (that is,
the "live insertion" situation).
• Power being re-established after a power-down or a power failure.

5.9.1 Power-up after live insertion

A +5 VDC pre-charge supply is used to enable live insertion of AMC8 cards. This voltage is
supplied to the AMC8 from the system backplane. It is passed to the AMC8 module via three
pins on connector P1 (see Figure 3-3). These pins are slightly longer than the other VME bus
connector pins.
When a module is inserted into a MPS rack that is powered up, these longer pins make
contact first (typically 200 ms before the other pins). During this time, the +5 VDC pre-charge
supply is used to power up all the +5 VDC parts on the module. This ensures that when the
bus driver makes contact with the running VME bus, the circuitry is already at approximately
the correct voltage. In this way no glitches are produced on the VME bus power, address or
data pins.
Once the rest of the pins (including the standard +5 VDC supply) make contact, no further
power is drawn from the +5 VDC pre-charge supply.

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Operation of LEDs on AMC8 panel

5.10Operation of LEDs on AMC8 panel

5.10.1 Global DIAG/STATUS indicator LED for the card

This multi-function, multi-colour LED is used for the following purposes:
• To indicate normal operation.
• To indicate the alarm status of “multi-channels”
• To indicate an AMC8 hardware failure.
Table 5-1 provides detailed information on the behaviour of the AMC8 DIAG/STATUS LED
for the card.

NOTE: In Table 5-1, events are presented in decreasing order of priority for an
AMC8 / IOC8T card pair (that is, “Red blinking” has the highest priority).

Table 5-1: Behaviour of DIAG/STATUS LED for the card

Behaviour of card
Event(s)
DIAG/STATUS LED

AMC8 hardware failure

or
Red blinking
AMC8 powered up but not yet configured
(monitoring not running)

Configuration error or IOC8T slot number mismatch

Yellow blinking
(monitoring not running)

AMC8 configured but in stabilisation phase

Green blinking
(monitoring not running)

Note: Applies to multi-channel processing only.

For Danger level alarms configured as not latched: indicates that
a signal is below the lower Danger level (D−) or above the upper
Danger level (D+). That is, there is a currently active processing alarm.
Red (continuous) For Danger level alarms configured as latched: indicates that
a signal was below the lower Danger level (D−) or above the upper
Danger level (D+) and was latched but has not yet been reset, or that a
signal is below the lower Danger level or above the upper Danger level.
That is, either there was a previously active processing alarm that has
not been reset or there is a currently active processing alarm.

Note: Applies to multi-channel processing only.

For Alert level alarms configured as not latched: indicates that
a signal is below the lower Alert level (A−) or above the upper
Alert level (A+). That is, there is a currently active processing alarm.
Yellow (continuous) For Alert level alarms configured as latched: indicates that
a signal was below the lower Alert level (A−) or above the upper
Alert level (A+) and was latched but has not yet been reset, or that a
signal is below the lower Alert level or above the upper Alert level. That
is, either there was a previously active processing alarm that has not
been reset or there is a currently active processing alarm.

Normal card operation – AMC8 configuration is running correctly with

Green (continuous)
no alarms and no errors

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Operation of LEDs on AMC8 panel

5.10.2 Individual status indicator LEDs for measurement channels

Table 5-2 provides detailed information on the behaviour of the AMC8 status indicator LEDs
for the eight individual measurement channels.

NOTE: In Table 5-2, events are presented in decreasing order of priority for an
AMC8 / IOC8T card pair (that is, “Off” has the highest priority).

Table 5-2: Behaviour of status indicator LEDs for individual measurement channels

Behaviour of
measurement channel Event(s)
status LED

Channel is not configured

Off or
AMC8 configuration is not running

Signal input to the channel is not valid

Green blinking
(either the lower or the upper “OK Level” has been exceeded)

Green blinking slowly

(approximately once per The channel inhibit function is activated for the channel
second)

Note: Applies to single-channel processing only.

For Danger level alarms configured as not latched: indicates that
a signal is below the lower Danger level (D−) or above the upper
Danger level (D+). That is, there is a currently active processing alarm.
Red (continuous) For Danger level alarms configured as latched: indicates that
a signal was below the lower Danger level (D−) or above the upper
Danger level (D+) and was latched but has not yet been reset, or that a
signal is below the lower Danger level or above the upper Danger level.
That is, either there was a previously active processing alarm that has
not been reset or there is a currently active processing alarm.

Note: Applies to single-channel processing only.

For Alert level alarms configured as not latched: indicates that
a signal is below the lower Alert level (A−) or above the upper
Alert level (A+). That is, there is a currently active processing alarm.
Yellow (continuous) For Alert level alarms configured as latched: indicates that
a signal was below the lower Alert level (A−) or above the upper
Alert level (A+) and was latched but has not yet been reset, or that a
signal is below the lower Alert level or above the upper Alert level.
That is, either there was a previously active processing alarm that has
not been reset or there is a currently active processing alarm.

Normal channel operation – channel is configured and signal input is

Green (continuous) valid (not exceeding lower or upper “OK Levels”). That is, there are no
active single-channel processing or multi-channel processing alarms.

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Different versions of the CPUM card

6 CPUM / IOCN CARD PAIR

6.1 Different versions of the CPUM card

In 2015, the CPUM card was updated to use a new PC/104 CPU module (PFM-541I or
equivalent) that supports two Ethernet interfaces by default, which required updates to the
underlying carrier board.
Previously, the CPUM card was fitted with a CPU module (MSM586SEN or equivalent) that
supported one Ethernet interface by default and required an additional Ethernet controller
module (MSME104 or equivalent) to be fitted in order to be Ethernet redundant.
So the different versions of the CPUM card in use are:
• Later versions of the CPUM card (PNR 200-595-076-HHh or later) fitted with
the PFM-541I or equivalent CPU module (see Figure 6-1).
• Earlier versions of the CPUM card (PNR 200-595-075-HHh or earlier) fitted with
the MSM586EN or equivalent CPU module (see Figure 6-2).

NOTE: Due to changes to the underlying CPUM carrier board, the later versions of the
CPUM card are not compatible with the earlier versions of the CPUM card.
Accordingly, the PFM-541I or equivalent CPU module can only be used with the
later versions of the CPUM card (PNR 200-595-076-HHh or later) and the
MSM586EN or equivalent CPU module can only be used with the earlier versions
of the CPUM card (PNR 200-595-075-HHh or earlier).

6.2 General overview

The CPUM is a modular CPU (central processing unit) card that acts as “rack controller” in a
networked VM600 system. Depending on system requirements, the CPUM can be used
either alone in the rack (installed in the front card cage) or in conjunction with the associated
IOCN input/output card (installed in slot 0 of the rear card cage, directly behind the CPUM).
The CPUM card consists of a carrier board with two PC/104 type slots that can accept
different PC/104 modules: a CPU module and an optional serial communications module.
All CPUM cards are fitted with a CPU module that supports two Ethernet connections
(primary and secondary) and two serial connections (primary and secondary). That is, both
the Ethernet redundant and serial redundant versions of the card.
The CPUM card with the CPU module provides:
• Primary Ethernet communications via the ‘NET’ connector (8P8C (RJ45)) on the CPUM
card’s panel or the ‘1’ connector (8P8C (RJ45)) on the IOCN card’s panel, if used.

NOTE: The ‘NET’ connector on the CPUM card and the ‘1’ connector on the IOCN card
are mutually exclusive, that is, only one can be used at any one time (configured
using jumpers on the CPUM).

• Secondary Ethernet communications via the ‘2’ connector (8P8C (RJ45)) on the IOCN
card’s panel, if used.
• Primary RS-232 communications via the ‘RS232’ connector (D-sub (DE-09)) on the
CPUM card’s panel.
• Secondary RS-232 or RS-485 communications via the ‘RS’ connector (6P6C
(RJ11/RJ25)) on the IOCN card’s panel, if used.

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VM600 MPS rack (CPUM) security

NOTE: The primary Ethernet connection is used for communication with the VM600 MPSx
software via a network and for Modbus TCP communications. The secondary
Ethernet connection is used for redundant Modbus TCP communications.
The primary serial connection is used for communication with the VM600 MPSx
software via a direct connection. The secondary serial connection is used for
Modbus RTU communications.

Optionally, a CPUM card can be fitted with a serial communications module (in addition to the
CPU module) in order to support additional serial connections. This is the serial redundant
version of the card.
The CPUM card with the optional serial communications module provides:
• RS-485 (115.2 kbps) communications as either half-duplex (2-wire) or
full-duplex (4-wire) via the ‘A’ and ‘B’ connectors (6P6C (RJ11/RJ25)) on the IOCN
card’s panel.

NOTE: The additional ‘A’ and ‘B’ serial connections can be used to configure multi-drop
RS-485 networks of VM600 racks using Modbus RTU communications.

A diagnostic LED (named DIAG) on the panel of the CPUM indicates the CPUM card status,
such as normal operation and whether VM600 MPS rack (CPUM) security is being used. The
CPUM card’s panel also contains an LCD display for showing the level of a selected
monitored output in bar-graph and digital form. The Alert and Danger levels are also indicated
on the bar graph.
Coloured LEDs (named OK, A and D) on the panel of the CPUM indicate the OK, Alert and
Danger status for the signal selected for display (see Figure 2-11). If slot 0 is selected, these
LEDs will indicate the general rack status.
SLOT and OUT (output) keys on the panel are used to select which signal to display. The
ALARM RESET button on the panel resets all latched alarms (and associated relays) for the
entire rack.
Possibilities allowed by the CPUM / IOCN pair include:
• ‘One-shot’ configuration of all VM600 cards using a direct Ethernet or RS-232 serial
connection from an external computer (laptop, notebook, pen-computer, industrial
computer or flat-panel computer) running the VM600 MPSx software, from Meggitt
Sensing Systems’ Vibro-Meter product line.
• ‘One-shot’ configuration of all VM600 cards via Ethernet from a networked computer
running the VM600 MPSx software.
• Visualisation of signal levels and alarm limits using the display on the CPUM card’s
panel.
• External communication with third party devices such as a DCS or PLC.
• VM600 MPS rack (CPUM) security.

6.3 VM600 MPS rack (CPUM) security

A VM600 MPS in a 19″ system rack (ABE04x) containing a CPUM card can implement
specific rack security features in order to limit the functionality of the MPS that are available
via the CPUM to Ethernet-based connections, such as the VM600 MPSx software, the
CPUM Configurator software or a Modbus TCP connection.
The use of the CPUM security features is recommended in order to help prevent accidental
or unauthorised access to a VM600 MPS configuration and other MPS system functionality,

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Block diagrams

thereby reducing the possibility of interference in the operation of the MPS and the machinery
being monitored.

NOTE: Refer to the VM600 MPS1 software manual for further information on VM600 MPS
rack (CPUM) security.

6.4 Block diagrams

Figures 6-1 and 6-2 show block diagrams of the different versions of the CPUM card with their
different CPU modules:
• Later versions of the CPUM card (PNR 200-595-076-HHh or later) fitted with
the PFM-541I or equivalent CPU module (see Figure 6-1).
• Earlier versions of the CPUM card (PNR 200-595-075-HHh or earlier) fitted with
the MSM586EN or equivalent CPU module (see Figure 6-2).
Figures 6-3 shows a block diagram of the IOCN card.
See 13 Configuration of CPUM / IOCN cards for information on how to use the jumpers on
the CPUM and IOCN cards to modify the operation of the external communications
interfaces.

6.5 Serial port naming

For the CPUM card:
• The RS-232 serial port on the card’s panel, shown as RS-232 (COM0) in Figures 6-1 and
6-2, corresponds to the RSFRONT device in the modbusDefault.cfg configuration
file.
(RSFRONT corresponds to the ser2 device driver of the QNX operating system used by
the CPUM card. This is the primary serial communications port.)
For the IOCN card:
• The serial port on the card’s panel, shown as RS (COM1) in Figure 6-3, corresponds to
the RS device in the modbusDefault.cfg configuration file.
(RS corresponds to the ser3 device driver of the QNX operating system used by the
CPUM card. This is the secondary RS-serial communications port.)
• The serial ports on the card’s panel, shown as A (COM2) in Figure 6-3, correspond to
the SERIAL_A device in the modbusDefault.cfg configuration file.
(SERIAL_A corresponds to the ser4 device driver of the QNX operating system used by
the CPUM card. This is the first of the additional serial communications ports and
requires that the optional serial communications module is fitted.)
• The serial ports on the card’s panel, shown as B (COM3) in Figure 6-3, correspond to
the SERIAL_B device in the modbusDefault.cfg configuration file.
(SERIAL_B corresponds to the ser5 device driver of the QNX operating system used by
the CPUM card. This is the second of the additional serial communications ports and
requires that the optional serial communications module is fitted.)

NOTE: Refer to the VM600 networking manual for further information.

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Serial port naming

PC/104 slot 2 J20

Optional
serial comms.
module:
AIM104-COM4
or equivalent
Display interface

VME bus
Display ISA to
VME
decoder VME

P1
(J1)

COM2
ISA bus

and (To A and B)

COM3

J40 J42
NET 8P8C (RJ45) J52 J53
ETH0 (To 1)
(J15)
ETH1 (To 2)

RS-232 to
RS-485

Half/full duplex:
J44
(COM0)

RS-232 J14 J28/J29

D-sub

Termination: J46
(RSFRONT) J39
J47 J48 J31 to J38
J16 COM1 (To RS)
PC/104 slot 1
J43
J21 J45
CPU module 1:
J41
PFM-541I
or equivalent

P2
(J2)
CPUM
panel

Figure 6-1: Block diagram of CPUM card fitted with the PFM-541I or equivalent
CPU module (PNR 200-595-076-HHh or later)

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Serial port naming

PC/104 slot 2 J20

Optional
serial comms.
module:
AIM104-COM4
or equivalent
Display interface

VME bus
PC/104 slot 2 J48

Optional
CPU module 2: Display ISA to
VME
MSME104 decoder VME
or equivalent

P1
(J1)

COM2
ISA bus

and (To A and B)

COM3
ETH1 (To 2)
J40 J42
NET 8P8C (RJ45) J52 J53
ETH0 (To 1)
(J15)

RS-232 to
RS-485

Half/full duplex:
J28/J29 J44
(COM0)

RS-232
D-sub

Termination: J46
J14
(RSFRONT) J47 J31 to J38
J39
J16 COM1 (To RS)
PC/104 slot 1
J43
J21 J45
CPU module 1:
J41
MSM586SEN J17
or equivalent
P2
(J2)
CPUM
panel

Figure 6-2: Block diagram of CPUM card fitted with the MSM586SEN or
equivalent CPU module (PNR 200-595-075-HHh or earlier)

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Serial port naming

6P6C
RS
(RJ11/RJ25)
(J6) (RS)
J20 J22 J24
J21 J23 6P6C
(RJ11/RJ25)
(J7)
A
6P6C (SERIAL_A)
(RJ11/RJ25)
(J8)

6P6C
(RJ11/RJ25)
(J9)
B
6P6C
(SERIAL_B)
(RJ11/RJ25)
(J10)

COM1

COM2

COM3

8P8C (RJ45)
(J1) 1

8P8C (RJ45)
(J2)
2
ETH0

ETH1

P4
(J11)
IOCN
panel

Figure 6-3: Block diagram of IOCN card

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Operation of LEDs on CPUM panel

6.6 Operation of LEDs on CPUM panel

6.6.1 DIAG LED

The CPUM card’s DIAG LED is used for the following purposes:
• To indicate normal operation.
• To indicate the activation of special functions (related to CPUM security settings).
Further information is given in Table 6-1.

Table 6-1: Behaviour of DIAG LED

Behaviour of
Event(s)
DIAG LED

Off (continuous) The CPUM is off or starting

The CPUM is operating normally and access to the CPUM card is
Green (continuous) allowed (CPUM Access Lock: Unlocked).
That is, VM600 MPS rack (CPUM) security is not being used.

Green blinking slowly The CPUM is operating normally but access to the CPUM card is
(approximately once restricted (CPUM Access Lock: Locked).
per second) That is, VM600 MPS rack (CPUM) security is being used.
Green blinking quickly
(approximately twice The CPUM card is resetting to its default security settings.
per second) for five That is, VM600 MPS rack (CPUM) security will not be used.
seconds

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 PROCESSING MODES AND APPLICATIONS
Different versions of the MPC4 card

7 PROCESSING MODES AND APPLICATIONS

This chapter describes the processing modes that can be configured on the VM600 MPS (for
example, shaft relative vibration, broad-band pressure). Additional background information is
provided on the types of measurements that can be performed in these modes.
The MPS is generally fully configured in the factory before delivery and can be employed as
is. In some cases one of the VM600 MPS software packages (MPS1 or MPS2) can be used
to allow further configuration of system parameters, or to reconfigure the MPS if it is extended
by the addition of MPC, IOC or relay cards (such as the RLC16).

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

7.1 Different versions of the MPC4 card

The MPC4 machinery protection card is available in different versions, including a standard
version, a separate circuits version and a safety (SIL) version, as described in
4 MPC4 / IOC4T card pair.
However, the safety MPC4 card (that is, the MPC4SIL) does not provide all of the signal
processing capabilities supported by the standard and the separate circuits versions of the
MPC4 (see Table 7-1).

Table 7-1: Overview of processing modes available on different version of the MPC4 card

Processing mode Supported?

channel

channel
Single-

VM600 MPSx software

Dual-

Description MPC4 MPC4SIL

processing function

(BBAB) Broad Band See 7.2 Broad-band

S Yes Yes
Absolute Bearing Vibration absolute bearing vibration
See 7.3 Tracking
(NB) Narrow Band
(narrow-band vibration S Yes No
(Tracking) Vibration
analysis)
See 7.4 Shaft relative
(RS) Relative Shaft
vibration with gap S Yes Yes
Vibration
monitoring
(AS) Absolute Shaft See 7.5 Shaft absolute
D Yes Yes
Vibration vibration
See 7.6 Position
(PS) Position S Yes Yes
measurement
See 7.7 Smax
(SMAX) Smax D Yes No
measurement
See 7.8 Eccentricity
(EC) Eccentricity S Yes No
measurements
(SEP) Relative Shaft See 7.9.4 Pendulum
S Yes No
Expansion with Pendulum method

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Different versions of the MPC4 card

Table 7-1: Overview of processing modes available on different version of the MPC4 card (continued)

Processing mode Supported?

channel

channel
Single-
VM600 MPSx software

Dual-
Description MPC4 MPC4SIL
processing function

See 7.9.2 Double shaft

(RST) Relative Shaft taper method and
D Yes No
Expansion (Shaft taper) 7.9.3 Single shaft taper
method
(RSC) Relative Shaft See 7.9.1 Shaft collar
D Yes No
Expansion (Shaft collar) method
(HE) Absolute Housing See 7.10 Absolute housing
S Yes No
Expansion expansion
(DHE) Differential Housing See 7.11 Differential
D Yes No
Expansion housing expansion
See 7.12 Broad-band
(BBP) Broad band Pressure S Yes No
pressure monitoring
(QSP) Quasi-Static See 7.13 Quasi-static
S Yes No
Pressure pressure monitoring
See 7.14 Differential
(DQSP) Delta-Quasi-Static
quasi-static pressure D Yes No
Pressure
monitoring
(QST) Quasi-Static See 7.15 Quasi-static
S Yes No
Temperature temperature monitoring
See 7.16 Differential
(DQST) Delta-Quasi-Static
quasi-static temperature D Yes No
Temperature
monitoring
(DMF) Dual Mathematical See 7.17 Dual mathematical
D Yes Yes
Function function
(NBFS) Narrow Band Fixed See 7.18 Narrow-band fixed
S Yes No
Frequency frequency
Notes
The safety MPC4 card (MPC4SIL) does not support the two speed/phase reference (tachometer) input channels that
are available on the standard and the separate circuits versions of the MPC4 card (MPC4).

For example, although the narrow-band (tracking) vibration processing mode is available for
the MPC4 card (standard and the separate circuits versions), it is not available for the
MPC4SIL card (safety version).

NOTE: Refer to the VM600 safety manual for further information.

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Broad-band absolute bearing vibration

7.2 Broad-band absolute bearing vibration

(1) Description
Absolute vibration is generally measured with seismic transducers mounted on a machine
bearing housing or other mechanical structure. A number of transducers (and matching
signal conditioners) are available from Meggitt Sensing Systems’ Vibro-Meter product line for
this purpose. The following front-end components are the most commonly used:
• CAxxx accelerometer + IPCxxx signal conditioner + GSIxxx galvanic separation
• CExxx accelerometer (current output) with built-in or integrally attached electronics +
GSIxxx galvanic separation
• CExxx accelerometer (voltage output) with built-in electronics
• CVxxx velocity transducer.
Each of the above configurations produces a raw voltage-based signal where the AC
component of the output voltage is directly proportional to the physical quantity measured
(absolute acceleration or absolute velocity).
The MPS is used to process the raw (AC/DC) signal provided by the transducer (and its signal
conditioner). The AC component of the raw signal is proportional to the absolute vibration.
The DC component is used by the MPC4 card's built-in "OK System" to monitor the correct
functioning of the measuring chain between the transducer and the MPC4 itself. It may
therefore be used to detect a problem in the transducer, signal conditioner, galvanic
separation or connecting cables (such as a defective component, short-circuit or open
circuit).
An optional broad-band filter can be added to each channel to reduce unwanted parts of the
frequency spectrum.
It is possible to perform one or two integrations on a signal proportional to absolute
acceleration in order to obtain outputs corresponding to absolute velocity or absolute
displacement. Alternatively, no integration need be performed.

NOTE: The broad-band processing technique is applicable to dynamic pressure

processing as well as vibration processing.

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Broad-band absolute bearing vibration

(2) Block diagram

Broad-band

Output 1
Vib. vib. value
input
Alarm level
detector
Output 1
vib. alarm

Output 2
vib. alarm

RMS (+ scaled values) Alarm level

Mean detector
Peak
Peak-Peak Output 2
vib. value

Figure 7-1: Block diagram showing broad-band absolute bearing vibration processing

Principal features:
• Configurable band-pass filtering (HP/LP) from 0.1 Hz to 10 kHz
• LP/HP ratio: up to 500 (up to 100 with double integration)
• Slope: up to 60 dB/octave
• Cut-off frequency: defined at −0.1 dB
• Unity gain: max. ±0.3 dB
• Pass-band ripple: max. ±0.1 dB
• Stop-band rejection: min. 50 dB
• Acceleration output (g or m/s2 or inch/s2)
• Velocity value processing (g or m/s2 or inch/s2 converted to mm/s or inch/s)
• Displacement value processing (g or m/s2 or inch/s2 converted to mm or mils).
Between 3 kHz and 10 kHz there can be some restrictions on the LP/HP ratio and filter slope
due to the demand on processing power required by the four MPC channels. Depending on
the MPC configuration, simultaneous processing on all four channels may cause processing
overload. See 14.7 Checking the MPC4 for processing overload for further information.
The processing selects for output two parameters per channel, which can be acceleration,
velocity or displacement. Each can be expressed as a rectified value of the type RMS, (True)
Mean, (True) Peak or (True) Peak-Peak. In addition, the following scaled RMS values are
available: Scaled Mean, Scaled Peak.
When one or two integrators are used in the processing, the broad-band filtering stage must
include at least one high-pass filter, having a minimum slope of 12 dB/octave.

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Tracking (narrow-band vibration analysis)

7.3 Tracking (narrow-band vibration analysis)

(1) Description
The tracking technique allows specific machine vibrations to be isolated and followed, for
example a particular shaft speed. This is a useful tool for machine condition monitoring,
particularly for the surveillance and balancing of critical, variable-speed, multiple-shaft
machines such as gas turbines.

(2) Block diagram

Narrow band
(DFT rectification)
Ampl. Scaling:
Phase RMS
Vib. Mean
input Peak
Peak-Peak
Output 1
DIV amplitude
value
Output 1
amplitude
Tacho or alarm
1/REV
Alarm level
detectors
Output 2
phase
alarm

Output 2
phase
value
Note: DIV = Number of wheel teeth x (multiplier / divider)

Figure 7-2: Block diagram showing tracking (narrow-band vibration analysis)

processing

Principal features:
• Calculation of 1X, 2X, 3X, 4X amplitude and phase, or amplitude only (if no 1/REV input)
• For analysis, calculation of 1/3 X, 1/2 X amplitude
• Wheel teeth can be set in the range 1 to 255
• Configurable fractional tacho ratio, where the multiplier (numerator) and the divider
(denominator) can be set in the range 1 to 65535
• Tacho range input from 0.3 Hz to 50 kHz
• Narrow-band filter with a high Q-factor (Q = 28)
Note: The Q-factor of 28 is a fixed value (hard-coded constant)
• Acceleration output (g, m/s2 or inch/s2)
• Velocity value processing (g, m/s2 or inch/s2 converted to mm/s or inch/s).
For a given harmonic, the processing outputs the amplitude and phase. However, the phase
is available only if the 1/REV input is present.
The tracking processing is able to operate in the frequency range 0.1 Hz to 10 kHz.

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Shaft relative vibration with gap monitoring

The ratio between the maximum and minimum fundamental frequencies that can be tracked
should not be greater than 25:1. For example, if the minimum tracked frequency is 4 Hz, the
maximum tracked frequency cannot be greater than 100 Hz.

7.4 Shaft relative vibration with gap monitoring

(1) Description
The relative movement between machine parts can be measured by non-contacting proximity
probes. The frequency range of these devices (for example, the TQ4xx series from Meggitt
Sensing Systems’ Vibro-Meter product line) is typically DC to 10 kHz, so they can be used in
both position and vibration measuring systems.
Shaft relative (relative shaft) vibration is measured with the proximity probe mounted on the
machine bearing. This measures the radial vibration of the shaft relative to the bearing.
The following front-end components are the most commonly used:
• TQxxx proximity transducer + IQS signal conditioner
• TQxxx proximity transducer + IQS signal conditioner + (Intrinsically safe) GSV power
supply and safety barrier (applications).
The MPC4 allows the following two types of analysis:
a. Vibration monitoring, that is, the analysis of the AC component of the signal.
b. Gap monitoring, that is, the analysis of the DC component of the signal.
(Note: The gap is the initial distance between the transducer and the target).

(2) Block diagram

RMS Output 1
Mean vib. value
Peak
Peak-Peak Output 1
vib. alarm

Sensor AC
input Alarm level
detectors

DC
Output 2
gap alarm

Initial Output 2
gap gap value

Figure 7-3: Block diagram showing relative shaft vibration with gap monitoring processing

The processing performs AC-component and DC-component separation. This provides

signals corresponding to the vibration and gap values, respectively. Vibration processing is
done with a 10 kHz bandwidth and DC processing with a 1 Hz bandwidth. The low-pass
cut-off frequency can be set between 250 Hz and 10 kHz using the VM600 MPSx software.

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The processing outputs one of two values per channel: either rectified displacement or
rectified velocity.
RMS, Mean, True Peak or True Peak-Peak rectification are possible on the AC displacement
or velocity value. The averaging time T can be configured using the VM600 MPS software.

7.5 Shaft absolute vibration

(1) Description
Absolute vibration is generally measured with seismic transducers (for example,
accelerometers, velocity transducers) mounted on a machine bearing housing or other
mechanical structure. Clearly, this technique cannot be used to measure vibrations on a
rotating shaft. Instead, the measurement is made as follows:
a. The relative shaft vibration (RS) is measured using a non-contacting proximity
transducer mounted on the machine bearing (see Figure 7-4). The transducer and
its signal conditioner output a voltage-based signal proportional to the distance
between the transducer tip and the rotating shaft. This corresponds to the relative
displacement between the shaft and the bearing.
b. The absolute bearing vibration (AB) is measured using a seismic transducer
mounted on the machine bearing. This will normally be an accelerometer, which
provides a voltage-based signal proportional to the absolute acceleration of the
bearing.
c. The absolute bearing vibration (AB) is processed by the MPS to provide a signal
proportional to the absolute displacement of the bearing.
The RS and AB values must be expressed in the same measuring units. For exam-
ple, if the AB signal is expressed in terms of acceleration, the MPS must perform two
integration operations on the AB signal to convert the relative acceleration into a rel-
ative displacement.
d. The shaft relative displacement found in step (a) and the broad-band absolute
bearing displacement found in step (c) are summed. The resulting signal is
proportional to the absolute shaft displacement (AS).
The following front-end components are most commonly used for measuring the shaft
relative vibration (see Figure 7-5):
• TQxxx proximity transducer + IQSxxx signal conditioner.
The following front-end components are most commonly used for measuring the absolute
bearing vibration (see Figure 7-5):
• CAxxx accelerometer + IPCxxx signal conditioner + GSIxxx galvanic separation
• CVxxx velocity transducer.

NOTE: If different low-pass (LP) cut-off frequencies are defined for the RS and AB
measurements, the lowest frequency will be used for both processes.

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Shaft absolute vibration

Accelerometer
AB

Support for RS
transducers
Signal AS
conditioner
Proximity
transducer

Shaft

MPC4
Bearing machinery
protection
card

Figure 7-4: Mounting of transducers for measuring shaft absolute vibration

MPC4
machinery
protection
card

Measurement
CAxxx IPCxxx GSIxxx
channel for AB
(Channel 1 or
Channel 3)

CVxxx

TQxxx IQSxxx
Measurement
channel for RS
(Channel 2 or
Channel 4)

Figure 7-5: Typical measuring chain configurations for shaft absolute vibration measurement

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Shaft absolute vibration

(2) Block diagram

Broad band

Available rectifiers:
RMS
Channel 1
Mean Output 1
vib. input
Peak AB vib. value
Peak-Peak
Output 1
AB vib. alarm

Output 2
AB vib. alarm

Output 2
AB vib. value

Dual Output
AS vib. alarm

Dual Output
AS vib. value

Output 1
RS vib. value

Output 1
RS vib. alarm

AC
Initial Output 2
gap gap value

Channel 2 DC
Output 2
vib. input
gap alarm

Figure 7-6: Block diagram showing absolute shaft vibration processing

The absolute shaft vibration function (AS) is a two-channel function where an absolute
bearing vibration signal (AB) is added to a relative shaft vibration signal (RS). The sum of
these (gain and phase correctly set) gives the shaft absolute vibration. The original RS and
AB values are also available.

NOTE: It should be remembered that when a signal is integrated, the output signal lags
the input signal by 90° (that is, the output signal is 90° behind the input signal).

AS = AB + RS (with sensors at the same location, )

AS = AB − RS (with sensors diametrically opposed, )

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Position measurement

7.6 Position measurement

(1) Description
The relative position of a shaft can be measured by placing a proximity probe on the bearing.
This type of measurement is particularly applicable to fluid-film thrust bearings where it is
necessary to measure the axial motion of the shaft relative to the bearing.
The following front-end components are the most commonly used:
• TQxxx proximity transducer + IQSxxx signal conditioner
• TQxxx proximity transducer + IQSxxx signal conditioner + (Intrinsically safe) GSVxxx
power supply and safety barrier (applications).

(2) Block diagram

Initial gap
( X initial )
Position value
( X out )

Position input Alarms

( X in )

Figure 7-7: Block diagram showing position processing

With a proximity probe connected to the MPS, the position processing function calculates the
position of the target relative to a reference point.
The initial target position (gap) must be stored (or configured). This will be used as a
reference position for measurement purposes. This value ( X initial ) depends on the physical
probe placement, and must be subtracted from the measured value ( X in ) in order to give
the target position relative to the reference position:
X out = X in − X initial

7.7 Smax measurement

(1) Description
Smax is a vibration measurement used in machinery monitoring systems, defined in
ISO 7919-1 as the maximum vibratory displacement in the plane of measurement.
Smax monitoring is a special case of shaft relative vibration monitoring that measures the
radial motion of the shaft. Like shaft relative vibration, it is typically measured using two
proximity transducers (X and Y) mounted on the machine bearing at approximately 90° to
each other (see Figure 7-8).
In general, the two proximity transducer (X and Y) values are added vectorially to provide the
Smax (maximum displacement) value as defined in ISO 7919-1. However, there are different
methods of calculating Smax, defined as methods A, B and C in ISO 7919-1 Annex B.

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Smax measurement

Method C – Measuring the real maximum displacement value (Smax) directly from
the orbit
According to ISO 7919-1 method C, the value of Smax(pk) the maximum value of
displacement, can be calculated directly from the orbit using the following equation:
Smax(pk) = Maximum { ( X(t)2 + Y(t)2 )0.5 }

This also allows the value of Smax(pp) (that is, peak to peak) to be approximated from the
following equation:
Smax(pp) = 2 ×Smax(pk)

NOTE: The Smax processing on VM600 MPC4 cards, VM600 XMV16 cards and
VibroSmart VSV300 modules all use ISO 7919-1 method C to calculate the value
of Smax.
However, since the actual signal processing implemented by VM600 MPC4 cards,
VM600 XMV16 cards and VibroSmart VSV300 modules is different, the calculated
Smax values obtained from their respective Smax processing functions can be
slightly different.

Proximity
transducer

To monitoring
electronics

Bearing housing
Shaft

Figure 7-8: Measurement of Smax using two proximity probes

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Smax measurement

(2) Block diagram

Relative shaft X vibration value + alarms

X input processing,
with gap X gap value + alarms

Smax value

Smax Smax alarms

Peak Alarm level

detector

Relative shaft Y vibration value + alarms

Y input processing,
with gap Y gap value + alarms

Figure 7-9: Block diagram showing Smax processing

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Eccentricity measurements

7.8 Eccentricity measurements

(1) Description
In addition to knowing the vibration of a shaft, it is sometimes useful to know the bow in a
shaft due to gravity or temperature gradients. This is a measure of the eccentricity of the
shaft. One of the proximity probes used for shaft relative vibration measurement can
additionally provide data to a processor having a low-pass filter and peak-to-peak value
rectifier. The low-frequency excursion of the shaft is measured when the shaft passes
through low speeds, for example, while the rotating machine is in its start-up phase or during
run-down.
The following front-end components are the most commonly used:
• TQxxx proximity transducer + IQSxxx signal conditioner
• TQxxx proximity transducer + IQSxxx signal conditioner + (Intrinsically safe) GSVxxx
power supply and safety barrier (applications).

(2) Block diagram

Output 1
1/REV eccentricity value
input

Output 1
alarms

Peak-Peak Alarm level

Low-pass Peak-Peak/Rev detector

Position
input
Output 2
eccentricity value

Output 2
alarms

Alarm level
1/REV detector
input

Figure 7-10: Block diagram showing eccentricity processing

Eccentricity processing characteristics:

• Low-pass filtering: Frequency up to LPF Hz (where LPF = 5 Hz by default, software
settable in the range 5 to 10 Hz)
• Cut-off slope = 24 dB/octave
• Ripple = 0.5 dB
• True Peak-to-Peak rectification used for continuous eccentricity measurement
• Peak-to-Peak per Revolution rectification used for triggered eccentricity measurement.
For this type of measurement, the 1/REV tacho input must be available.

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Shaft relative expansion

7.9 Shaft relative expansion

In larger, high-temperature machines, the temperature difference between the rotor and the
housing (stator) leads to relative expansion between these two elements. This may cause
problems (for example, retaining clearances), which is why a shaft relative expansion
measuring system is recommended for such machines.
The relative expansion value can be several tens of millimetres, which is beyond the
measuring range of a single proximity probe. For this reason, Meggitt Sensing Systems’
Vibro-Meter product line offers four types of measurement systems that offer an extended
measuring range. Three of these use a double sensor arrangement which can be easily
processed by a single MPC4 card configured for dual channel processing. The various probe
configurations and their related mathematical functions are described in this section.

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Shaft relative expansion

7.9.1 Shaft collar method

(1) Description
Two probes are used in this configuration, with one probe placed on each side of a shaft collar
(see Figure 7-11). Two possibilities exist:
• Both probes are operating in their measuring range at the same time.
• The probes are operating alternately, with only one probe in its measuring range at a
given time. This doubles the measuring range that is possible with a single probe.

a. When both probes are in their operating range at the same time:
If GAP1i and GAP2i are the respective initial gaps, then:
ΔL = (GAP1 − GAP2) / 2 − (GAP1i − GAP2i) / 2
If initial gaps are equal, the differential expansion is:
ΔL = (GAP1 − GAP2) / 2

b. When the probes are operating alternately:

ΔL = (GAP1 − GAP1i) in the operating range of probe 1.
ΔL = (GAP2i − GAP2) in the operating range of probe 2.

Figure 7-11: Two proximity probes mounted near a shaft fitted with a collar

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Shaft relative expansion

(2) Block diagram

X position value

Input 1 X position alarms

Initial
gap 1 Expansion value

∆L Expansion alarms
Initial
gap 2
Y position value

Input 2 Y position alarms

Alarm level
detectors

Figure 7-12: Block diagram showing processing for shaft collar method

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Shaft relative expansion

7.9.2 Double shaft taper method

(1) Description
Two probes are used in this configuration, with each probe facing one side of a double shaft
taper (see Figure 7-13). This solution is simple and effective, allowing large measuring
ranges if the taper angle is small (for example, for a taper angle of 5°, the measuring range
is increased about nine-fold).
This method allows the measuring range to be extended by a factor of 1 / sinα:
ΔL = ΔG1 / sinα = −ΔG2 / sinα
=> 2ΔL = (ΔG1 − ΔG2) / sinα
=> ΔL = (ΔG1 − ΔG2) / 2sinα
finally,
ΔL = [ (GAP1 − GAP1i) − (GAP2 − GAP2i) ] / 2sinα
where GAPi is the initial gap value.

Figure 7-13: Two proximity probes mounted near a shaft fitted with a double taper

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Shaft relative expansion

(2) Block diagram

X position value

Input 1 X position alarms

f(α1)
Initial
gap 1 Expansion value

ΔL Expansion alarms
Initial
gap 2
f(α2) Y position value

Input 2 Y position alarms

Alarm level
detectors

Figure 7-14: Block diagram showing processing for double shaft taper method

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7.9.3 Single shaft taper method

(1) Description
Two probes are used in this configuration (see Figure 7-15). The first probe is placed
perpendicularly to a single shaft taper and measures expansion. The second probe is placed
perpendicularly to the axis of rotation to compensate for any radial motion of the shaft which
could introduce an error in the measured expansion value. Both probes operate within their
measuring range at the same time.

Figure 7-15: Two proximity probes mounted near a shaft fitted with a single taper

For this configuration the following formulae apply:

ΔL = ΔG / sinα
ΔG = ΔG1 − ΔG’
ΔG’ = ΔG2 cosα
=> ΔL = (ΔG1 − ΔG2 cosα) / sinα
finally,
ΔL = [ (GAP1 − GAP1i) − (GAP2 − GAP2i) cosα ] / sinα
where GAPi is the initial gap value.

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Shaft relative expansion

(2) Block diagram

X position value

Input 1 X position alarms

f(α)
Initial
gap 1 Expansion value

∆L Expansion alarms
Initial
gap 2
Y position value

Input 2 Y position alarms

Alarm level
detectors

Figure 7-16: Block diagram showing processing for single shaft taper method

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Shaft relative expansion

7.9.4 Pendulum method

(1) Description
With this configuration a magnet on a lever arm is used to follow the movement of the shaft
collar (see Figure 7-17). The lever arm ratio (L1 / L2) enables the measuring range to be
extended well beyond that of a transducer used on its own.
ΔL = GAP − GAPi where GAPi is the initial gap.

Pivot point

Proximity transducer

Vertical arm of pendulum

(long arm of lever)

Short arm of lever

Head of pendulum
(magnetic)

Shaft collar

Shaft

Figure 7-17: A measuring system using a pendulum with magnetic

head installed near a shaft collar

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Shaft relative expansion

(2) Block diagram

Alarm

Input
Alarm level
Initial detector
gap

Value

Figure 7-18: Block diagram showing processing for pendulum method

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Absolute housing expansion

7.10Absolute housing expansion

(1) Description
All thermal machines are subject to absolute expansion due to variations in their temperature.
The measurement of this parameter is performed on the machine at one or two critical points
on the housing using an absolute expansion probe, such as the AE119 (measuring range up
to 50 or 100 mm) from Meggitt Sensing Systems’ Vibro-Meter product line. The body of this
probe is attached to a fixed reference and its measuring element makes physical contact with
the machine housing.
In Figure 7-19 below, two probes are used to measure two different (independent) machine
bodies, for example, the HP and LP turbine housings. The MPC4 is set up for single channel
processing. One MPC4 channel is required for each probe.

HP turbine LP turbine
housing housing

AE119
housing expansion probe

To monitoring electronics
(Channel 1)

To monitoring electronics
(Channel 2)

Figure 7-19: Measuring the absolute housing expansion on two different bodies

Figure 7-20 shows the processing performed for a single AE119 housing expansion probe.

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Differential housing expansion

(2) Block diagram

Alarm

Input
Alarm level
Initial detector
gap

Value

Figure 7-20: Block diagram showing absolute housing expansion processing

7.11Differential housing expansion

(1) Description
In this situation (see Figure 7-21), two probes measure on opposite sides of the same
machine body (for example, the HP or the LP turbine housing). The MPC4 is set up for
dual-channel processing.

Right side

Machine Housing expansion probes To monitoring

housing electronics

Left side

Figure 7-21: Measuring the differential housing expansion on two parts of the same body

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Broad-band pressure monitoring

2) Block diagram

X1 value

X1 input X1 alarms

Initial
gap 1 X1−X2 value

X1−X2 alarms
Initial
gap 2
X2 value

X2 input X2 alarms

Alarm level
detectors

Figure 7-22: Block diagram showing differential housing expansion processing

The difference in expansion measured on each side of the machine is calculated as follows:
ΔX = (X1 − Initial GAP1) − (X2 − Initial GAP2)

7.12Broad-band pressure monitoring

Output 1
pressure value

Alarm level
detector

Broad band Output 1

pressure alarm

Pressure
Output 2
input
pressure alarm

RMS (+ scaled values) Alarm level

Mean detector
Peak
Peak-Peak

Output 2
pressure value

Figure 7-23: Block diagram showing broad-band pressure processing

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PROCESSING MODES AND APPLICATIONS
Quasi-static pressure monitoring

Principal features:
• HP and LP cut-off frequencies for band-pass filtering can be set in the range 0.1 Hz to
10 kHz
• HP/LP ratio: up to 500
• Slope: up to 60 dB/octave
• Cut-off frequency: defined at −0.1 dB
• Unity gain: max. ±0.3 dB
• Pass-band ripple: ±0.1 dB
• Stop-band rejection: min. 50 dB
• Pressure processing (mbar, bar, psi, Pa) => pressure unit (mbar or bar or psi or Pa)
• User-defined input unit => User-defined output units (scaled 1 to 1).
The processing selects for output two parameters per channel. Each can be expressed as a
rectified value of the type (True) RMS, (True) Mean, (True) Peak or (True) Peak-Peak. In
addition, the following scaled RMS values are available: Scaled Mean, Scaled Peak.
Any of the four pressure units (mbar, bar, psi, Pa) can be selected, provided the unit is defined
for the input channel.

7.13Quasi-static pressure monitoring

Input Alarm

Alarm level
detector
Static pressure
compensation
Value

Figure 7-24: Block diagram showing quasi-static pressure processing

This type of processing is equivalent to that used for absolute housing expansion processing
(see 7.10 Absolute housing expansion).

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 PROCESSING MODES AND APPLICATIONS
Differential quasi-static pressure monitoring

7.14Differential quasi-static pressure monitoring

Static pressure
compensation 1

X1 value

X1 input X1 alarms

X1−X2 value

X1−X2 alarms

X2 value

X2 input X2 alarms

Alarm level
detectors
Static pressure
compensation 2

Figure 7-25: Block diagram showing differential quasi-static pressure processing

This type of processing is equivalent to that used for differential housing expansion
processing. See 7.11 Differential housing expansion.

7.15Quasi-static temperature monitoring

Input Alarm

Alarm level
detector
Static
temperature
compensation Value

Figure 7-26: Block diagram showing quasi-static temperature processing

This type of processing is equivalent to that used for absolute housing expansion processing
(see 7.10 Absolute housing expansion), but using a temperature unit expressed in °C.

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PROCESSING MODES AND APPLICATIONS
Differential quasi-static temperature monitoring

7.16Differential quasi-static temperature monitoring

Static temperature
compensation 1

X1 value

X1 input X1 alarms

X1−X2 value

X1−X2 alarms

X2 value

X2 input X2 alarms

Alarm level
detectors
Static temperature
compensation 2

Figure 7-27: Block diagram showing differential quasi-static temperature processing

This type of processing is equivalent to that used for differential housing expansion
processing. See 7.11 Differential housing expansion.
In this situation, two temperature probes are used and the MPC4 is set up for dual-channel
processing. The differential output is given by:
ΔX = X1 − X2

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 PROCESSING MODES AND APPLICATIONS
Dual mathematical function

7.17Dual mathematical function

(1) Description
Dual mathematical function (DMF) processing provides a range of dual-channel
mathematical functions that operate on the single-channel processed outputs of the
measurement channel inputs on an MPC4 card (see Figure 7-28).
The mathematical functions provided include basic mathematical operations (addition and
subtraction) and discriminator operations that select the minimum value or the maximum
value from the two input channels.

NOTE: DMF processing only operates on the first processed outputs from the
single-channel processings (shown as Out 1 in Figure 7-28).

The mathematical functions are:

• RMS Sum which performs the RMS addition of two single-processing input channels:
( (Channel 1)2 + (Channel 2)2 )0.5 or ( (Channel 3)2 + (Channel 4)2 )0.5
The RMS Sum function requires that both input channels are configured with an RMS
rectifier.
• RMS Subtraction which performs the RMS subtraction of two single-processing input
channels: ( (Channel 1)2 − (Channel 2)2 )0.5 or ( (Channel 3)2 − (Channel 4)2 )0.5
The RMS Subtraction function requires that both input channels are configured with an
RMS rectifier.

NOTE: For RMS Subtraction, if (Channel 2)2 > (Channel 1)2 or

(Channel 4)2 > (Channel 3)2 then zero (0.0) is returned.

• SUM which performs the addition of two single-processing input channels:

(Channel 1 + Channel 2) or (Channel 3 + Channel 4)
The SUM function requires that both input channels are configured with the same
rectifier.
• SUBTRACTION which performs the subtraction of two single-processing input channels:
(Channel 1 − Channel 2) or (Channel 3 − Channel 4)
The SUBTRACTION function requires that both input channels are configured with the
same rectifier.
• X & Y MIN which selects the smaller value from two single-processing input channels:
Minimum { (Channel 1 , Channel 2) } or Minimum { (Channel 3 , Channel 4) }
The X & Y MIN function requires that both input channels are configured with the same
rectifier.
• X & Y MAX which selects the larger value from two single-processing input channels:
Maximum { (Channel 1 , Channel 2) } or Maximum { (Channel 3 , Channel 4) }
The X & Y MAX function requires that both input channels are configured with the same
rectifier.

NOTE: In order to use dual mathematical function (DMF) processing with two
single-processing input channels, both single-processing input channels
(channel 1 and channel 2, or channel 3 and channel 4) must be configured with the
same single-channel processing function (for example, broad-band absolute
bearing vibration (BBAB)) and with rectifiers from the same rectifier group (for
example, AVG, RMS or True).

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PROCESSING MODES AND APPLICATIONS
Dual mathematical function

As shown in Figure 7-28 as Out 1, dual mathematical function processing only operates on
the first processed outputs from the single-channel processings:
• DMF for Measurement Input Channels 1 & 2 operates on the first processed outputs of
Channel 1 and Channel 2.
• DMF for Measurement Input Channels 3 & 4 operates on the first processed outputs of
Channel 3 and Channel 4.

NOTE: The Dual mathematical function processing implemented on VM600 MPC4 cards
can be configured as X & Y MAX in order to use ISO 7919-1 method B to calculate
an Smax value. See also 7.7 Smax measurement.

(2) Block diagram

Output 1 value
(Out 1)
Output 1 alarms
Single-channel
Input 1
processing
Output 2 value
(Channel 1 or
Channel 3) (Out 2)
Output 2 alarms

DMF value

DMF alarms
DMF

Output 1 value
(Out 1)
Output 1 alarms
Single-channel
Input 2
processing
Output 2 value
(Channel 2 or
Channel 4) (Out 2)
Output 2 alarms

Alarm level
detectors

Note: The DMF (dual mathematical function) processing function can be: RMS Sum,
RMS Subtraction, SUM, SUBTRACTION, X & Y MAX or X & Y MIN.

Figure 7-28: Block diagram showing DMF processing

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 PROCESSING MODES AND APPLICATIONS
Narrow-band fixed frequency

7.18Narrow-band fixed frequency

1) Description
Narrow-band fixed frequency tracking (NBFS) processing is similar to narrow-band (tracking)
vibration (NB) processing in that it uses a narrow-band filter with a high Q-factor (Q=28) in
order to allow specific machine vibrations to be isolated. However, this technique uses a fixed
frequency narrow-band filter that is defined in terms of a particular shaft speed (so it does not
track the machine speed).

(2) Block diagram

Narrow band

Ampl. Scaling:
RMS
Vib. Mean
input Peak
Peak-Peak
Output 1
amplitude
value
Output 1
amplitude
Speed in RPM alarm
(fixed) Alarm level
detector

Figure 7-29: Block diagram showing narrow-band fixed frequency processing

Principal features:
• Calculation of amplitude only (no 1/REV input)
• Fixed-frequency narrow-band filter with a high Q-factor (Q = 28)
Note: The Q-factor of 28 is a fixed value (hard-coded constant)
• Acceleration output (g, m/s2 or inch/s2)
• Velocity value processing (g, m/s2 or inch/s2 converted to mm/s or inch/s).

The frequency of interest is defined in terms of a fixed machine speed (Center Speed
in RPM), as follows:
Centre frequency, f0 = Center Speed in RPM / 60
Bandwidth, BW = f0 / Q , where Q = 28

The centre frequency f0 is the geometric mean of the bandwidth, defined by the −3 dB cutoff
frequencies: lower cut-off frequency (f1) and upper cut-off frequency (f2).
Bandwidth, BW = f0 / Q = f2 − f1 , where Q = 28

Which allows the cutoff frequencies be calculated using:

Lower cut-off frequency, f1 = f0 ( ( 1 + (1 / 4Q2) )0.5 − (1 / 2Q) ) , where Q = 28

Upper cut-off frequency, f2 = f0 ( ( 1 + (1 / 4Q2) )0.5 + (1 / 2Q) ) , where Q = 28

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Narrow-band fixed frequency

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 Part II: Installing
VM600 MPS hardware
and using the system

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 INSTALLATION
Introduction

8 INSTALLATION
Before installing or otherwise working with a VM600 rack, it is important to refer to the
information given in the Safety section of this manual, including:
• Electrical safety and installation on page xiv
• Hazardous voltages and the risk of electric shock on page xv
• Hot surfaces and the risk of burning on page xv
• Heavy objects and the risk of injury on page xv
• Replacement parts and accessories on page xvi.

8.1 Introduction
The VM600 MPS is a modular system with cards being installed in a 19" x 6U rack (type
ABE040 or ABE042). ABE040 and ABE042 racks have 21 VME slots, designated slot 0 to
slot 20 (from left to right, as seen from the front). ABE056 racks have two VME slots on the
back and one VME slot on the front. One slot is designated slot 1 and the other slot x, since
it can be set to any slot from slot 3 to 14.
The front and rear card cages of the rack are partitioned by a backplane. Each side of the
backplane is equipped with connectors allowing modules and cards to be quickly and easily
installed.
The following elements are connected to the backplane by installing them from the front of
the rack:
• RPS6U rack power supply (ABE04x only)
• MPC4 machinery protection card
• AMC8 analog monitoring card
• CPUM modular CPU card (ABE04x only).
The following elements are connected to the backplane by installing them from the rear of
the rack:
• IOC4T input/output card, for use with the MPC4
• IOC8T input/output card, for use with the AMC8
• IOCN input/output card, for use with the CPUM (ABE04x only)
• RLC16 relay card
• IRC4 intelligent relay card.

If the ABE04x rack is intended for use as a condition monitoring system (CMS) as well as an
machinery protection system (MPS), it can contain additional hardware.
A CMS using the VM600 CMS software from Meggitt Sensing Systems can use the following
hardware:
• CMC16 condition monitoring card (ABE04x only)
• IOC16T input/output card, for use with the CMC16 (ABE04x only).

NOTE: Further information on this CMS hardware can be found in the

VM600 condition monitoring system (CMS) hardware manual (MACMS-HW/E).

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Introduction

A CMS using the VibroSight ® software from Meggitt Sensing Systems can use the following
hardware:
• XMC16 extended monitoring card for combustion (ABE04x only)
• XMV16 extended monitoring card for vibration (ABE04x only)
• XMVS16 extended monitoring card for vibration (ABE04x only)
• XIO16T extended input/output card, for use with the XMC16, XMV16 or
XMVS16 (ABE04x only).

NOTE: Further information on this CMS hardware can be found in the

VibroSight help (VibroSight.chm).

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 INSTALLATION
Attribution of slots in the rack

8.2 Attribution of slots in the rack

Table 8-1 show the installation restrictions that apply to the ABE040 and ABE042 racks.

Table 8-1: Attribution of slots in an ABE04x rack

VME Card/system component Card/system component

slot no. accepted in front card cage accepted in rear card cage

0 Reserved for IOCN

Reserved for CPUM
1 RLC16 or IRC4
2 Reserved for VME 32 card RLC16 or IRC4
MPC4, AMC8, CMC16, XMC16, Associated IOC4T, IOC8T, IOC16T or
3 to 14
XMV16 or XMVS16 XIO16T. Or RLC16 or IRC4.
15 RLC16 or IRC4
Reserved for RPS6U
16 (Power supply 2, PS2) RLC16
(Width of RPS6U = 3 slots)
17 RLC16
18 RLC16
Reserved for RPS6U
19 (Power supply 1, PS1) Reserved for rear panel associated with
(Width of RPS6U = 3 slots) the rack power supply (one or two
20 RPS6Us)
Notes
An MPC4 card must have an IOC4T card installed directly behind it in the rack.
An AMC8 card must have an IOC8T card installed directly behind it in the rack.
A CMC16 card must have an IOC16T card installed directly behind it in the rack.
An XMC16, XMV16 or XMVS16 card must have an XIO16T card installed directly behind it in the rack.
One or two RPS6U rack power supplies can be installed in a VM600 system rack. A rack can have two RPS6U
rack power supplies installed for different reasons: in order to support rack power supply redundancy
(2.10.5 Racks with two RPS6U rack power supplies in order to support rack power supply redundancy) or in
order to supply power to the cards (2.10.6 Racks with two RPS6U rack power supplies in order to supply power
to the cards).

Table 8-2 show the installation restrictions that apply to the ABE056 rack:

Table 8-2: Attribution of slots in an ABE056 rack

VME Card/system component Card/system component

slot no. accepted in front card cage accepted in rear card cage

1 None RLC16
MPC4, AMC8, XMC16, XMV16 or
3 Associated IOC4T, IOC8T or XIO16T
XMVS16

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Rack safety requirements

8.3 Rack safety requirements

8.3.1 Adequate ventilation

VM600 19" racks do not contain any ventilation units (fans). They therefore rely on either
forced ventilation by fans in the cabinet or on natural ventilation (convection) for their cooling.
All require the free flow of air in an upward direction, with air entering the rack through the
vents in the base of the rack and leaving it through the vents on the top of the rack.
When racks are installed in a cabinet or enclosure, in which natural ventilation is used, a
space of at least 50 mm should be present below and above each rack for an ABE04x rack
(see Figure 8-1, Case A) and 20 mm for an ABE056 rack (see Figure 8-2, Case A).
It is possible to prevent warm air flowing from one rack to another, by placing inclined plates
between them in order to deflect the airflow (see Figure 8-1, Case B for an ABE04x rack and
Figure 8-2, Case B for an ABE056 rack). When inclined plates are used with VM600 racks,
an inclined plate can also function as a non-flammable separation barrier, if required
(see 8.3.4 Instructions for locating and mounting). In addition, the space of 50 mm or 20 mm
should be present below and above ABE04x or ABE056 racks respectively.

Always ensure adequate spacing (minimum 50 mm or 20 mm for ABE04x or

ABE056 racks respectively) is provided below and above the rack to allow
proper natural ventilation.
Failure to adhere to this requirement will cause overheating of the rack and
as a consequence will affect the correct operation of the system.

If an ABE04x rack is assembled without empty slots between the MPS and/or CMS
processing cards, it is recommended to use forced ventilation if the temperature of the air
flowing through the rack exceeds 40°C. If a 19” x 6U rack has at least one empty slot between
each processing card, it is recommended to use forced ventilation if the temperature of the
air flowing through the rack exceeds 55°C.
In a case where forced ventilation by fan units is used, the spacing above, below and between
racks can be reduced to zero, providing that the airflow to/from neighbouring racks is
ensured.

HAZARDOUS TEMPERATURES CAN EXIST WITHIN AND ON VM600 SYSTEM

RACKS (ABE04X).

DEPENDING ON THE AMBIENT OPERATING TEMPERATURE, NUMBER OF CARDS AND

POWER SUPPLIES INSTALLED (AND THEIR CONFIGURATION AND OPERATION), THE
INSTALLATION AND COOLING (FORCED OR NATURAL VENTILATION), THE TOP OF A
VM600 RACK CAN BECOME HOT AND THERE IS THE RISK OF BURNING WHEN HANDLING
THE RACK.

SEE ALSO HOT SURFACES AND THE RISK OF BURNING ON PAGE XV.

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 INSTALLATION
Rack safety requirements

Case A

Natural ventilation Forced ventilation

>50 mm >50 mm

>50 mm Rack-mounted Fan

>50 mm

Case B
Natural ventilation Forced ventilation

VM600
VM600 Front rack
Front
rack of rack of rack
(side view)
(Side view)
Rack-mounted Fan

>50 mm >50 mm

Rack-mounted Fan
>50 mm
>50 mm
Inclined plates
to deflect airflow

Rack-mounted Fan
Airflow

Airflow

Figure 8-1: Minimum required spacing above, below and between ABE04x racks
in an enclosure using natural or forced ventilation

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INSTALLATION
Rack safety requirements

Case A

Natural ventilation Forced ventilation

>20 mm >20 mm
>20 mm Rack-mounted Fan
>20 mm

Case B

Natural ventilation Forced ventilation

Front
Side view
of rack
Front
Side view Rack-mounted Fan
of rack >20 mm
>20 mm

>20 mm Rack-mounted Fan

Inclined plates >20 mm
to deflect airflow
Airflow Rack-mounted Fan

Airflow

Figure 8-2: Minimum required spacing above, below and between ABE056 racks
in an enclosure using natural or forced ventilation

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Rack safety requirements

8.3.2 Circuit breaker

In some circumstances the operator must ensure a switch or circuit breaker is provided in
order to comply with the IEC/EN 61010-1 standard. This standard stipulates that permanently
connected equipment (such as a VM600 ABE04x rack) must employ a switch or circuit
breaker as a means of disconnection from the mains supply.
VM600 ABE04x racks employing an AC-input version of the RPS6U rack power supply
already have an ON/OFF switch or switches (and a fuse or fuses) at the rear of the rack.
However, this is not the case for the DC-input versions of the RPS6U rack power supply, so
an appropriately rated external circuit breaker or equivalent must be used.
For a VM600 rack using a DC-input version of the RPS6U rack power
supply, the mains power supply lead (power cord) linking the VM600 rack
to the mains supply must pass through an external switch or circuit
breaker.
The switch or circuit breaker must be installed and used in accordance with
the manufacturer’s instructions in order to ensure the correct and reliable
protection of the VM600 rack.
The switch or circuit breaker must be chosen in accordance with the
version of the DC-input RPS6U rack power supply used, and in particular
the maximum permitted input current and output power.
For later versions of the RPS6U (PNR 200-582-x00-02h or later) that define
the power as a total maximum output power of 330 W, the
recommendations are:
• A 30 A circuit breaker for an RPS6U rack power supply with a 24 VDC input
• A 6 A circuit breaker for an RPS6U rack power supply with a 110 VDC input.
For earlier versions of the RPS6U (PNR 200-582-x00-01h or earlier) that
define the power as a rated power of 300 W, the recommendations are:
• A 23 A circuit breaker for an RPS6U rack power supply with a 24 VDC input
• A 5 A circuit breaker for an RPS6U rack power supply with a 110 VDC input.
(See 2.10.1 Different versions of the RPS6U rack power supply for further
information.)
The operator must have easy access to the switch or circuit breaker at all
times.

8.3.3 Supply wiring

A VM600 rack using the AC-input version of the RPS6U rack power supply is supplied with a
mains power supply lead (power cord). Power supply rear panels with two AC inputs for
independent mains supplies are supplied with two mains cables. However, no lead (cable) is
supplied with a VM600 rack using the DC-input version of the RPS6U.

NOTE: Refer to the RPS6U rack power supply data sheet and VM600 system rack
(ABE04x) data sheet for further information on the mains power supply lead (power
cord) supplied with a VM600 rack.

In general, for a VM600 rack, the mains power supply lead (power cord)
used must be of sufficient cross-section to meet the power requirements of
the connected equipment.

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INSTALLATION
Rack safety requirements

The AC-input rear panels with mains sockets used by VM600 racks have a power entry
module that requires temperature derating when a rack operates in environments with
temperatures greater than 50°C. See Appendix A.4 - Temperature derating for the power
entry module of a VM600 rack for further information.

For a VM600 rack using an AC-input version of the RPS6U rack power
supply, the AC-mains power supply lead (power cord) must meet the
following requirements.
For later versions of the RPS6U (PNR 200-582-x00-02h or later) that define
the power as a total maximum output power of 330 W, the requirements are:
• The AC-mains power supply lead shall be rated for 4 ARMS minimum
current at 45°C for an RPS6U using a 230 VAC input.
• The AC-mains power supply lead shall be rated for 6.4 ARMS minimum
current at 45°C for an RPS6U using a 115 VAC input.

For earlier versions of the RPS6U (PNR 200-582-x00-01h or earlier) that

define the power as a rated power of 300 W, the requirements are:
• The AC-mains power supply lead shall be rated for 6 ARMS minimum
current at 45°C for an RPS6U.
For all versions of the RPS6U (PNR 200-582-x00-02h and
PNR 200-582-x00-01h), additional requirements are:
• The AC-mains power supply leads shall be at least 1 mm2 (no. 16 AWG)
and it shall also conform to the following standards, where applicable:
IEC 60227: Polyvinyl chloride insulated cables of rated voltages up to and
including 450/750 V.
IEC 60245: Rubber insulated cables – Rated voltages up to and including
450/750 V.
IEC 60799: Requirements for cord sets and interconnection cord sets for
household and similar general purpose equipment.

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Rack safety requirements

For a VM600 rack using a DC-input version of the RPS6U rack power
supply, the DC-mains power supply lead (power cord) must meet the
following requirements.
For later versions of the RPS6U (PNR 200-582-x00-02h or later) that define
the power as a total maximum output power of 330 W, the requirements are:
• The DC-mains power supply lead shall be rated for 30 ADC minimum
current at 105°C for an RPS6U with a 24 VDC input.
• The DC-mains power supply lead shall be rated for 6 ADC minimum
current at 105°C for an RPS6U with a 110 VDC input.
For earlier versions of the RPS6U (PNR 200-582-x00-01h or earlier) that
define the power as a rated power of 300 W, the requirements are:
• The DC-mains power supply lead shall be rated for 23 ADC minimum
current at 105°C for an RPS6U with a 24 VDC input.
• The DC-mains power supply lead shall be rated for 5 ADC minimum
current at 105°C for an RPS6U with a 110 VDC input.
For all versions of the RPS6U (PNR 200-582-x00-02h and
PNR 200-582-x00-01h), additional requirements are:
• The DC-mains power supply lead shall be at least 2.5 mm2 (no. 12 AWG)
for an RPS6U with a 24 VDC input.
• The DC-mains power supply lead shall be at least 1 mm2 (no. 16 AWG)
for an RPS6U with a 110 VDC input, support 2700 VAC / 1 minute and have
a minimum insulation thickness of 0.4 mm.

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Rack safety requirements

8.3.4 Instructions for locating and mounting

A POPULATED VM600 SYSTEM RACK WITH CARDS AND RACK POWER SUPPLIES
INSTALLED IS A HEAVY OBJECT.

DEPENDING ON THE NUMBER OF VM600 CARDS AND RPS6U RACK POWER SUPPLIES
INSTALLED, A VM600 SYSTEM RACK (ABE04x) CAN BE TOO HEAVY TO LIFT, LOWER
OR OTHERWISE HANDLE MANUALLY BY A SINGLE PERSON AND THERE IS THE RISK OF
INJURY DURING INSTALLATION OR REMOVAL.

SEE ALSO HEAVY OBJECTS AND THE RISK OF INJURY ON PAGE XV.

The positioning of the VM600 rack shall allow easy access to the on/off
switch for the main supply.
A fully equipped VM600 rack can weigh 23 kg, so the following instructions
apply:
• Two people are required to carry or mount the VM600 rack in its cabinet.
• Shelves, guide rails and other devices used to support a VM600 rack must
be strong enough to bear the weight of the rack.

For the standard version (PNR: 204-040-100-0xx), separate-circuits version

(PNR: 204-040-100-1xx) and rear-mounting version (PNR: 204-042-100-0xx)
of the VM600 rack, deflection plates (barriers) must be installed both above
and below the VM600.
The barriers installed above and below a VM600 rack are required to
prevent unintentional access to the equipment in order to help reduce the
risk of electrical shock.
In addition, the barrier installed below a VM600 rack is also required in
order to help prevent the spread of fire in the unlikely event that one should
occur. Accordingly, the barrier below a VM600 must be a non-flammable
separation barrier made of metal or a UL94 V-1 rated (or better) material.
See also ELECTRICAL SAFETY AND INSTALLATION ON PAGE XIV.
When inclined plates are used with a VM600 rack in order to deflect airflow
and prevent warm air flowing into a rack, an inclined plate can also function
as a required deflection plate (barrier) if it is made from an appropriate
material. See 8.3.1 Adequate ventilation.

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Installation procedure for cards

8.4 Installation procedure for cards

HAZARDOUS VOLTAGES EXIST WITHIN VM600 SYSTEM RACKS (ABE04X).
WHEN AN RPS6U RACK POWER SUPPLY, ASSOCIATED REAR PANEL OR CARD IS
REMOVED FROM A VM600 SYSTEM RACK (ABE04X), THE RACK BACKPLANE –
CONTAINING HAZARDOUS VOLTAGES – IS EXPOSED AND THERE IS THE RISK OF
ELECTRIC SHOCK, AS INDICATED BY THE USE OF THE FOLLOWING WARNING LABEL ON
THE EQUIPMENT:

SEE ALSO HAZARDOUS VOLTAGES AND THE RISK OF ELECTRIC SHOCK ON PAGE XV.

HAZARDOUS TEMPERATURES CAN EXIST WITHIN AND ON VM600 SYSTEM

RACKS (ABE04X).

DEPENDING ON THE AMBIENT OPERATING TEMPERATURE, NUMBER OF CARDS AND

POWER SUPPLIES INSTALLED (AND THEIR CONFIGURATION AND OPERATION), THE
INSTALLATION AND COOLING (FORCED OR NATURAL VENTILATION), THE TOP OF A
VM600 RACK CAN BECOME HOT AND THERE IS THE RISK OF BURNING HANDLING THE
RACK, AS INDICATED BY THE USE OF THE FOLLOWING WARNING LABEL ON THE
EQUIPMENT:

SEE ALSO HOT SURFACES AND THE RISK OF BURNING ON PAGE XV.

Operating personnel should remember to observe the handling

precautions mentioned in Handling precautions for electrostatic sensitive
devices on page xvi when handling cards.
Failure to do this may result in cards becoming damaged by electrostatic
discharges.

Before inserting a card in the rack, check visually that none of the
connector pins are bent.

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INSTALLATION
Installation procedure for cards

8.4.1 First-time installation of the MPS

The initial insertion of elements in the ABE04x rack should be done with the
rack powered down.

8.4.1.1 Hardware
When a VM600 MPS is installed for the first time, the MPC4 / IOC4T and/or AMC8 / IOC8T
card pairs that it contains must be configured according to their intended application.
The IOC4T and IOC8T cards have adjustable hardware elements (micro-switches and
jumpers) that have to be set up before insertion in the rack. See 9 Configuration of
MPC4 / IOC4T cards and 10 Configuration of AMC8 / IOC8T cards for further information.

NOTE: The elements on the IOC4T and IOC8T cards are normally configured in the
factory before delivery of the MPS.

8.4.1.2 Software
A VM600 MPS rack containing MPC4 and/or AMC8 card pairs must be configured using one
of the VM600 MPS software packages (MPS1 or MPS2) before the system can be used. This
is done once the rack is powered up.
For a stand-alone rack, the configuration can be downloaded from a computer to each MPC4
and/or AMC8 card in turn via an RS-232 link. For a networked rack, the configuration for all
MPC4 and/or AMC8 cards can be downloaded in ‘one-shot’ via an Ethernet link.
See 1.3 Communicating with the VM600 MPS for further information.
The majority of parameters are normally configured in the factory before delivery. The user
is nevertheless able to modify certain parameters if required using one of the VM600 MPS
software packages.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

8.4.2 Subsequent installation of cards ("hot-swapping” capability)

For a networked rack (that is, a rack containing a CPUM card and, optionally, its associated
IOCN card), the behaviour of the CPUM card after it detects a change of configuration for an
MPC4 or AMC8 card – for example, after the hot swap of a card or the reconfiguration of an
individual card via an RS-232 link – depends on:
• The version of the CPUM card’s firmware.
• And for CPUM firmware version 067 or later – the setting of the CPUM’s
“configuration master” parameter.
See also 8.4.2.6.2 Cards in a stand-alone rack and 8.4.2.6.3 Cards in a networked rack.

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Installation procedure for cards

8.4.2.1 CPUM cards running firmware version 066 or earlier

In a networked rack, how the CPUM running firmware version 066 or earlier reacts after it
detects a change of configuration for a card is always the same, as the CPUM is always the
configuration master:
• When this version of the CPUM detects a change of configuration for an MPC4 or AMC8
card, the CPUM will use the configuration for the card stored in the CPUM’s non-volatile
memory to reconfigure the card. That is, in the case of a configuration conflict, the
CPUM’s copy of the card’s configuration is the master.

8.4.2.2 CPUM cards running firmware version 067 or later

In a networked rack, how the CPUM running firmware version 067 or later reacts after it
detects a change of configuration for a card is determined by the setting of the CPUM’s
configuration master parameter, as shown in Figure 8-3.
The CPUM’s configuration master parameter selects one of two modes of operation:
• If VM600 cards (MPC4 and AMC8) are set as the configuration master, when the CPUM
detects a change of configuration for a card, the CPUM will read the configuration from
the card and save it in the CPUM’s non-volatile memory for future use. That is, in the
case of a configuration conflict, the card’s own copy of its configuration is the master.
• If the CPUM card is set as the configuration master, when the CPUM detects a change
of configuration for a card, the CPUM will use the configuration for the card stored in the
CPUM’s non-volatile memory to reconfigure the card. That is, in the case of a
configuration conflict, the CPUM’s copy of the card’s configuration is the master.

NOTE: By default, the configuration master parameter for CPUM cards running firmware
version 067 or later is set to VM600 cards (MPC4 and AMC8).

For example, in a networked VM600 rack with a CPUM card running firmware version 067,
the default behaviour is that VM600 cards are the configuration master. In such a rack, if an
MPC4 or AMC8 card’s configuration is changed using the RS-232 link on the panel of the
card or a card is replaced by another card of the same type with a different configuration
(keeping the same slot number), and the power supply to the rack is turned off and then
turned on, then the card’s configuration will remain the “new” configuration (see Figure 8-3).

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INSTALLATION
Installation procedure for cards

Start

Is there a card
No
(MPC4 or AMC8) in a
VM600 rack slot?

Yes

Is the card’s The CPUM will configure the

configuration OK and is No
card with the CPUM’s copy
the card running? of the card’s configuration

Yes

Is the card’s
configuration different from No
the CPUM’s copy of the card’s
configuration?

Yes

Did the card boot

No
with the configuration that it is
currently running?

Yes The CPUM will read the

configuration from the card
and save it for future use

Is the CPUM the No

“configuration master”?

Yes

The CPUM will configure the

card using the CPUM’s copy
of the card’s configuration

Figure 8-3: Hot-swap behaviour for a networked VM600 rack with

CPUM firmware version 067 or later

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Installation procedure for cards

8.4.2.3 Hot swapping a card in the front of a VM600 rack

The procedure for hot swapping a card in the front of a VM600 rack is as follows.
In the front of the rack:
1- Disconnect the external cables connected to the card, if any.
2- Remove the card from the rack (see 14.6.2 Replacing a suspect card).
3- Insert the replacement card in the front of the rack.
4- Reconnect any cables to the card.

8.4.2.4 Hot swapping a card in the rear of a VM600 rack

Before “hot swapping” a card in the rear of a VM600 rack, any associated
processing card in the corresponding slots in the front of the rack must be
disconnected from the rack’s backplane.
See 14.6.2 Replacing a suspect card.

The procedure for hot swapping a card in the rear of a VM600 rack is as follows.
First, in the front of the rack:
1- Remove any associated processing card in the corresponding slot in the front of the rack
from the rack’s backplane.
Then, in the rear of the rack:
2- Disconnect all external cables connected to the card.
3- Remove the card from the rear of the rack (see 14.6.2 Replacing a suspect card).
4- Insert the replacement card in the rear of the rack.
5- Reconnect all of the cables to the card.
Finally, in the front of the rack:
6- Reinsert the associated processing card in the corresponding slot in the front of the rack
(to the rack’s backplane).

8.4.2.5 Which card types can be hot swapped?

It is necessary to power down the ABE04x rack before inserting or removing any of the
following elements:
• CPUM
• RPS6U, in racks employing a single power supply.
The following elements have “hot swapping” capability, that is, they can be removed from and
inserted into the MPS rack while it is powered up (a technique sometimes referred to as “live
insertion”):
• MPC4 and its associated IOC4T card (see 8.4.2.6 Hot swapping MPC4 and AMC8
cards, and the IRC4 card)
• AMC8 and its associated IOC8T card (see 8.4.2.6 Hot swapping MPC4 and AMC8
cards, and the IRC4 card)
• RLC16
• RPS6U.
A single RPS6U rack power supply can be replaced in racks employing two such power
supplies to support rack power supply redundancy (see 2.10.5 Racks with two RPS6U
rack power supplies in order to support rack power supply redundancy).

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Installation procedure for cards

8.4.2.6 Hot swapping MPC4 and AMC8 cards, and the IRC4 card

8.4.2.6.1 General remarks on MPC4 / IOC4T and AMC8 / IOC8T card pairs, and the IRC4 card
The configuration of an MPC4 card and its associated IOC4T, an AMC8 card and its
associated IOC8T or an IRC4 card is specific to a given slot in the rack. It depends on the
type of transducer and signal conditioner connected, as well as the desired signal routing to
other cards (for example, for the control of relays on an RLC16 card).
The MPC4 and AMC8 cards each contain a flash memory that is used to store the
configuration for a given slot in the rack. The memory also contains the intended slot for the
card (for example, slot nn).
Problems can occur if an MPC4 / IOC4T, AMC8 / IOC8T or IRC4 card
configured for slot mm is installed in slot nn. Hardware damage can occur
either to the card itself or to transducers and/or signal conditioners in the
measuring chain.
To avoid damage occurring when swapping these cards, carefully read
8.4.2.6.2 Cards in a stand-alone rack and 8.4.2.6.3 Cards in a networked
rack.

In general, careless “hot swapping" of IOC4T, IOC8T or IRC4 cards can lead
to measurement errors or incorrect functioning of relays.

8.4.2.6.2 Cards in a stand-alone rack

NOTE: The following remarks concern stand-alone racks. These do not contain a CPUM
card are not connected to a network.

As stated in 8.4.2.6.1 General remarks on MPC4 / IOC4T and AMC8 / IOC8T

card pairs, and the IRC4 card, hardware damage can occur if a card
intended for slot mm is inserted in slot nn.
Because of this, a new MPC4, AMC8 or IRC4 card must only be installed
"live" and without reconfiguration if its configuration is known to be
identical to that of the card previously removed.

See 8.4.2.6.4 Reading the configuration of a card for further information.

8.4.2.6.3 Cards in a networked rack

NOTE: The following remarks concern networked racks. These contain a CPUM card
(and, optionally, its associated IOCN card) and are connected to a network.

For a networked rack, if a card originally used in slot mm is inserted in slot nn, the CPUM card
recognises that the card’s configuration does not match the slot.

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Installation procedure for cards

The behaviour of the CPUM card after it detects a change of configuration for a card depends
on:
• The version of the CPUM card’s firmware.
• And for CPUM firmware version 067 or later – the setting of the CPUM’s configuration
master parameter.
See 8.4.2.1 CPUM cards running firmware version 066 or earlier and 8.4.2.2 CPUM cards
running firmware version 067 or later for further information.

Problems can occur if a card taken from slot nn of rack x is inserted into
slot nn of rack y, as slot nn can be used for totally different functions in
each rack.
This form of hot swapping should be avoided unless you are certain that
the cards in slot nn of each rack have exactly the same configuration.
More generally, if you do not know how a card is configured, you should not
install it before finding its configuration as stated in 8.4.2.6.4 Reading the
configuration of a card.

8.4.2.6.4 Reading the configuration of a card

The following procedure can be used:
1- Disconnect the front-end components (that is, transducer, signal conditioner, probe and
cables) from the rack by unfastening the connectors on the IOC4T or IOC8T card
installed in slot nn.
2- Insert into slot nn the MPC4 or AMC8 card whose configuration you want to read.
3- Use the VM600 MPS software to read the configuration of the card in slot nn (see
example in Figure 8-4, in which the card in slot 3 is selected).
4- Modify the card configuration if necessary using the VM600 MPSx software.
5- Reconnect the front-end components to the connectors on the IOC4T or IOC8T card
installed in slot nn.

Figure 8-4: VM600 MPS software menu bar commands used to read the configuration
of a card

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Installation procedure for cards

8.4.3 Setting the IP address of the CPUM card

The IP address of the CPUM must be defined for networked racks.
Each CPUM is given the IP address of 10.10.56.56 in the factory before delivery of the MPS
system. However, it is strongly recommended to change this IP address, which is done using
a VT100 terminal (or emulator from the Windows environment).

NOTE: Refer to the VM600 networking manual for further information.

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 CONFIGURATION OF MPC4 / IOC4T CARDS
Definition of screw terminals on the IOC4T card

9 CONFIGURATION OF MPC4 / IOC4T CARDS

This chapter describes the connectors on the IOC4T card. These are accessed from the rear
of a VM600 MPS rack.
Typical connection diagrams are included for measurement signal sensors (such as
accelerometers and proximity probes) and speed signal sensors.
Information is also given on attributing specific alarm signals to specific relays on RLC16
cards, and using the Open Collector Bus and the Raw Bus.

9.1 Definition of screw terminals on the IOC4T card

The IOC4T panel (rear of rack) contains three terminal strips, identified as J1, J2 and J3 (see
Figure 9-1). Each strip consists of a socket and a mating connector, which contains 16 screw
terminals. The screw terminals can accept wires with a cross section of ≤1.5 mm2.
The mating connectors are labelled “SLOT xx Jn” (where xx is the slot number and Jn = J1,
J2 or J3) to enable the connector to be matched to the correct socket of the correct card.
Each socket and mating connector can be equipped with a mechanical key system to prevent
incorrect connection.
Further details on these screw terminal contacts can be found in Table 9-1.

Table 9-1: Definition of terminals for J1, J2 and J3 on the IOC4T card

Terminal Name Definition

Connector J1
1 PS Measurement channel 1, power supply contact
2 HI Measurement channel 1, differential signal input (high)
3 LO Measurement channel 1, differential signal input (low)
4 SHIELD Measurement channel 1, shield contact
5 PS Measurement channel 2, power supply contact
6 HI Measurement channel 2, differential signal input (high)
7 LO Measurement channel 2, differential signal input (low)
8 SHIELD Measurement channel 2, shield contact
9 PS Measurement channel 3, power supply contact
10 HI Measurement channel 3, differential signal input (high)
11 LO Measurement channel 3, differential signal input (low)
12 SHIELD Measurement channel 3, shield contact
13 PS Measurement channel 4, power supply contact
14 HI Measurement channel 4, differential signal input (high)
15 LO Measurement channel 4, differential signal input (low)
16 SHIELD Measurement channel 4, shield contact

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Definition of screw terminals on the IOC4T card

Table 9-1: Definition of terminals for J1, J2 and J3 on the IOC4T card (continued)

Terminal Name Definition

Connector J2
1 PS Tacho channel 1, power supply contact
2 HI Tacho channel 1, differential signal input (high)
3 LO Tacho channel 1, differential signal input (low)
4 SHIELD Tacho channel 1, shield contact
5 PS Tacho channel 2, power supply contact
6 HI Tacho channel 2, differential signal input (high)
7 LO Tacho channel 2, differential signal input (low)
8 SHIELD Tacho channel 2, shield contact
9 RL1 Contact of relay RL1
10 RL1 Contact of relay RL1
11 RL2 Contact of relay RL2
12 RL2 Contact of relay RL2
13 RL3 Contact of relay RL3
14 RL3 Contact of relay RL3
15 RL4 Contact of relay RL4
16 RL4 Contact of relay RL4
Connector J3
Processed DC output for measurement channel 1
1 DC OUT 1
(0 to 10 V or 4 to 20 mA)
Processed DC output for measurement channel 2
2 DC OUT 2
(0 to 10 V or 4 to 20 mA)
Processed DC output for measurement channel 3
3 DC OUT 3
(0 to 10 V or 4 to 20 mA)
Processed DC output for measurement channel 4
4 DC OUT 4
(0 to 10 V or 4 to 20 mA)
5 TM Trip Multiply input (control line)
6 DB Danger Bypass input (control line)
7 AR Alarm Reset input (control line)
8 RET Return line for TM, DB, AR and DC OUT n

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Definition of screw terminals on the IOC4T card

Table 9-1: Definition of terminals for J1, J2 and J3 on the IOC4T card (continued)

Terminal Name Definition

High line of differential output corresponding to the raw signal for

9 RAW 1H
measurement channel 1
Low line of differential output corresponding to the raw signal for
10 RAW 1L
measurement channel 1
High line of differential output corresponding to the raw signal for
11 RAW 2H
measurement channel 2
Low line of differential output corresponding to the raw signal for
12 RAW 2L
measurement channel 2
High line of differential output corresponding to the raw signal for
13 RAW 3H
measurement channel 3
Low line of differential output corresponding to the raw signal for
14 RAW 3L
measurement channel 3
High line of differential output corresponding to the raw signal for
15 RAW 4H
measurement channel 4
Low line of differential output corresponding to the raw signal for
16 RAW 4L
measurement channel 4

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Definition of screw terminals on the IOC4T card

Connector J1
(terminal strip with 16 screw
terminals)

Connector J2
(terminal strip with 16 screw
terminals)

Connector J3
(terminal strip with 16 screw
terminals)

Figure 9-1: View of IOC4T card showing definition of terminals

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 CONFIGURATION OF MPC4 / IOC4T CARDS
Connecting vibration and pressure sensors

9.2 Connecting vibration and pressure sensors

The IOC4T panel has four screw terminals for each of the four measurement channels. These
terminals are as follows:

PS Power supply for transducer or signal conditioner.

HI
Differential input for
LO the signal.

SHIELD Terminal for connecting the shield of the transmission cable.

This section contains a description of the measurement channel inputs and includes typical
connection diagrams.
The MPC4 / IOC4T card pair can be used to power sensors having built-in or integrally
attached signal conditioners, providing the current requirement is ≤25 mA. In cases where
this built-in power supply capability is insufficient, an external power supply must be used.
Table 9-2 shows when this is necessary.

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Table 9-2: Use of an internal (MPC4) or external power supply for various types of sensors

Transducer or
Connection
transducer and Output signal Rating Supplied by
diagram
signal conditioner

Accelerometers and velocity transducers

2-wire constant current 2 to 20 mA
power supply (CE680 1 V to 20 V MPC4 / IOC4T Figure 9-6
(18 to 30 VDC)
or competitor product)

CE1xx and CE3xx 5 mA ±2 mA 12 to 18 VDC MPC4 / IOC4T Figure 9-5

SE120 12 mA ±8 mA +15 to +36 VDC MPC4 / IOC4T Figure 9-5

CAxxx + IPC704 +18 to 30 VDC,

12 mADC / 5 mAAC MPC4 / IOC4T Figure 9-5
(2-wire, current mode) 25 mA

CAxxx + IPC704 +18 to 30 VDC,

+7.5 VDC / 5 VAC MPC4 / IOC4T Figure 9-4
(3-wire, voltage mode) 25 mA

Current modulation: −15 to −30 VDC

MPC4 / IOC4T Figure 9-5
12 mA ±5 mA Imax ≤17 mA
CV210 + IVC632
Voltage modulation:
Imax ≤6 mA MPC4 / IOC4T Figure 9-4
−7.5 VDC ±5 VAC

Velocity transducers
such as CV210 or AC only N/A N/A Figure 9-7
competitor product

CAxxx + IPCxxx +24 VDC ±10%,

7 VDC ±5 VAC External supply Figure 9-8
with GSI127 100 mA

CAxxx + IPCxxx +24 VDC ±10%,

7 VDC ±5 VAC External supply Figure 9-9
with GSI124 60 mA
+24 VDC ±10%,
CExxx with GSI124 7 VDC ±2 VAC External supply Figure 9-9
60 mA
Displacement probes
Voltage output:
−20 to −32 V MPC4 / IOC4T Figure 9-4
0 to −20 V
TQ4xx + IQS45x
Current output:
25 mA max. MPC4 / IOC4T Figure 9-5
15 to 20 mA

TQxxx + IQSxxx Voltage output: −24 VDC ±10%,

External supply Figure 9-8
with GSI127 0 to −20 V 125 mA

TQxxx + IQSxxx Voltage output: −24 VDC ±10%,

External supply Figure 9-9
with GSI124 0 to −20 V 85 mA

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Table 9-2: Use of an internal (MPC4) or external power supply for various types of sensors (continued)

Transducer or
Connection
transducer and Output signal Rating Supplied by
diagram
signal conditioner

Voltage output:
18 to 30 VDC External supply Figure 9-11
0 to 10 V
LS12x + ILS73x 170 mA
Current output:
(600 mA start-up External supply Figure 9-12
4 to 20 mA
current)
Displacement transducers
4 to 12 mA for
50 mm. +20 to +30 VDC
AE119 External supply Figure 9-12
4 to 20 mA full max. 60 mA
scale.
Pressure sensors
+18 VDC ±10%,
CP1xx + IPC704 12 mA ±5 mA External supply Figure 9-5
Imax ≤17 mA

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9.2.1 General considerations

The IOC4T circuitry associated with the PS, HI, LO and SHIELD terminals (see Figure 9-3)
is configurable using the VM600 MPS software. More specifically, the fields in the property
sheets for the Measurement Channels node (a child of the Inputs node) in the tree structure
(left) are used to configure switches Sw1 and Sw2 automatically and appropriately for a
variety of applications and different types of transducer and/or signal conditioner (see
Figure 9-2).

Figure 9-2: The Inputs (parent) and Measurement Channels (child) nodes
in the MPS1 software

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

Switch Sw1 is set according to whether a voltage-modulated or a current-modulated signal is

provided by the transducer or transducer and signal conditioner system:
• Voltage-modulated signal: Sw1 open.
• Current-modulated signal: Sw1 closed.
The position of Sw1 is determined by the setting of the Signal Transmission Mode field (see
Figure 9-2). The correct setting (current or voltage) is chosen automatically by the program
when standard transducers and signal conditioners from Meggitt Sensing Systems’
Vibro-Meter product line are selected (using the Sensor Type and Conditioner fields). For
non-Vibro-Meter devices, the operator must enter the appropriate setting (current or voltage)
in the Signal Transmission Mode field.
Switch Sw2 is used to connect the IOC4T card's sensor power supply to either the PS or the
HI terminal.
The position of Sw2 is determined by the setting of the Sensor Power Supply field (see
Figure 9-2). The correct setting is chosen automatically when standard transducers and
signal conditioners from Meggitt Sensing Systems’ Vibro-Meter product line are selected
(using the Sensor Type and Conditioner fields). For non-Vibro-Meter devices, the operator
must enter the appropriate setting in the Sensor Power Supply field. The option No Supply
sets Sw2 to position 2. Any other option (+27 VDC, −27 VDC, +15 VDC or +6.16 mA) sets
Sw2 to position 1.

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The Sensor Connected field has no direct influence on the setting of Sw1 and Sw2. The field
can be considered as a comment for the user. When it is set to "No", the other fields in this
VM600 MPS software window will be unavailable (that is, appear greyed out), but the values
and settings will still be effective.

Sensor
power
supply

Figure 9-3: Circuitry associated with measurement channel inputs

NOTE: For all devices (Meggitt Sensing Systems’ Vibro-Meter products and competitor
products), the Sensor Power Supply field has to be set to one of the voltage
values (No Supply, +27 VDC, −27 VDC, +15 VDC or +6.16 mA). Any one of these
settings can be chosen.

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9.2.2 Connection diagrams for hardware powered by IOC4T / MPC4

9.2.2.1 Voltage-modulated signal

Applies to the following transducers or transducer and signal conditioner systems:
• CV210 + IVC632
• TQ4xx + IQS45x
• CAxxx + IPC704 (3-wire, voltage modulation).

Sensor
power
supply

Figure 9-4: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
For non-Vibro-Meter devices, the Signal Transmission Mode field has to be set to the
Voltage option.
2- Switch Sw2 is set to position 1 to connect the IOC4T card's sensor power supply to the
PS terminal.
For non-Vibro-Meter devices, the Sensor Power Supply field has to be set to the
appropriate voltage powered option (+27 VDC, −27 VDC or +15 VDC).
3- The required power supply for the IPC704 is +27.2 V.

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9.2.2.2 Current-modulated signal

Applies to the following transducers or transducer and signal conditioner systems:
• CAxxx + IPC704 (2-wire, current modulation)
• CE1xx
• CE3xx
• CPxxx + IPC704 (2-wire, current modulation, Note: This setup is not recommended)
• CV210 + IVC632 (PS = −27.2 V, HI = COM)
• SE120
• TQ4xx + IQS45x (PS = −27.2 V, HI = COM).

Sensor
power
supply

Figure 9-5: Connection diagram

Notes
1- Switch Sw1 is closed to allow current-modulated signals to be processed.
For non-Vibro-Meter devices, the Signal Transmission Mode field has to be set to the
Current option.
2- Switch Sw2 is set to position 1 to connect the IOC4T card's sensor power supply to the
PS terminal.
For non-Vibro-Meter devices, the Sensor Power Supply field has to be set to the
appropriate voltage (+27 VDC, −27 VDC or +15 VDC).

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9.2.2.3 Constant current power supply and voltage-modulated signal

Applies to the following transducers:
• CE6xx.

External link Sensor

power
supply

Figure 9-6: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
For non-Vibro-Meter devices, the Signal Transmission Mode field has to be set to the
Voltage option.
2- Switch Sw2 is set to position 1 to connect the IOC4T card's sensor power supply to the
PS terminal.
For non-Vibro-Meter devices, the Sensor Power Supply field has to be set to a current
option.
3- An external link must be made between the PS and HI terminals.
4- The standing current value is 6.16 mA.

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9.2.3 Connection diagrams for unpowered hardware

9.2.3.1 Voltage-based signal

Applies to the following transducers:
• CV213 and CV214 velocity transducers.

Sensor
power
supply

Figure 9-7: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-based signals to be processed.
For non-Vibro-Meter devices, the Signal Transmission Mode field has to be set to the
Voltage option.
2- Switch Sw2 can be set to position 1 or position 2 depending on the application:
• When switch Sw2 is set to position 1, the OK system check will not detect an open
circuit condition at the input to the card due to a faulty sensor or cabling (see
4.7.1 OK system checking).
• When switch Sw2 is set to position 2, the OK system check will work normally.
However, the accuracy of the measurement on the channel will be affected as the
current flowing through the resistor R2 (100 kΩ) will introduce an error.
See 9.2.1 General considerations for information on how the set the position of Sw2.

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9.2.4 Connection diagrams for externally powered hardware

9.2.4.1 Voltage-modulated signal with GSI127 galvanic separation unit

Applies to the later versions of the following transducers or transducer and signal conditioner
systems:
• CAxxx + IPC704 + GSI127 galvanic separation unit
• CE1xx + GSI127 galvanic separation unit
• CE3xx + GSI127 galvanic separation unit
• CPxxx + IPC704 + GSI127 galvanic separation unit
• TQ4xx + IQS45x + GSI127 galvanic separation unit.

IOC4T MPC4
Sensor
power
supply

GSI127
O/P
SIGNAL

0V
From sensor (transducer)
or measurement chain

+/COM
−
24 VDC

−/COM
I/P +

(+) (−)
External
power
supply

Figure 9-8: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Voltage option.
2- Switch Sw2 must be set to position 1. This connects the IOC4T card's sensor power
supply to the PS terminal, though in fact this terminal is not used.
The Sensor Power Supply field can be set to any option (+27 VDC, −27 VDC, +15 VDC
or +6.16 mA).

NOTE: Do not set the Sensor Power Supply field to No Supply. This option is reserved
for unpowered sensors and will cause Sw2 to go to position 2, thus putting 27.2 V
on the HI terminal.

3- The operator must connect an external power supply to terminals “24 VDC +” and
“24 VDC −” of the GSI127 galvanic separation unit.

NOTE: More detailed information on connecting equipment to an electronic monitoring

system can be found in the project-specific wiring diagram delivered with the
system or by referring to the electrical connections (wiring diagrams) section of the
appropriate sensors and signal conditioners installation manual.

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9.2.4.2 Voltage-modulated signal with GSIxxx galvanic separation unit

Applies to the earlier versions of the following transducers or transducer and signal
conditioner systems:
• CAxxx + IPC704 + GSIxxx galvanic separation unit
• CE1xx + GSIxxx galvanic separation unit
• CE3xx + GSIxxx galvanic separation unit
• CPxxx + IPC704 + GSIxxx galvanic separation unit
• TQ4xx + IQS45x + GSIxxx galvanic separation unit.

Sensor
power
supply

External
power
supply

Figure 9-9: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Voltage option.
2- Switch Sw2 must be set to position 1. This connects the IOC4T card's sensor power
supply to the PS terminal, though in fact this terminal is not used.
The Sensor Power Supply field can be set to any option (+27 VDC, −27 VDC, +15 VDC
or +6.16 mA).

NOTE: Do not set the Sensor Power Supply field to No Supply. This option is reserved
for unpowered sensors and will cause Sw2 to go to position 2, thus putting 27.2 V
on the HI terminal.

3- The operator must connect an external power supply to terminals 2 and 3 of the GSIxxx
galvanic separation unit.

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9.2.4.3 Voltage-modulated signal with power supply and safety barrier unit
Applies to the following transducers or transducer and signal conditioner systems:
TQ4xx + IQS45x + GSVxxx power supply and safety barrier unit.

External
power
supply
Sensor
power
supply

Figure 9-10: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Voltage option.
2- Switch Sw2 is set to position 1. This connects the IOC4T card's sensor power supply to
the PS terminal, though in fact this terminal is not used.
The Sensor Power Supply field can be set to any powered option (+27 VDC, −27 VDC,
+15 VDC or +6.16 mA) but should preferably be set to +6.16 mA.
3- The operator must connect an external power supply to terminals 1 and 2 of the GSVxxx
power supply and safety barrier unit.

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9.2.4.4 Voltage-modulated signal without galvanic separation unit

Applies to the following transducers or transducer and signal conditioner systems:
• LS12x + ILS73x (HI => MIN. GAP 0 to 10 V, LO => COM).

Sensor
power
supply

Signal
0V
Supply

External
power
supply

Figure 9-11: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Voltage option.
2- Switch Sw2 is set to position 1. This connects the IOC4T card's sensor power supply to
the PS terminal, though in fact this terminal is not used.
The Sensor Power Supply field can be set to any powered option (+27 VDC, −27 VDC,
+15 VDC or +6.16 mA) but should preferably be set to +6.16 mA.
3- The operator must connect an external power supply to the transducer or transducer and
signal conditioner.

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9.2.4.5 Current-modulated signal

Applies to the following transducers or transducer and signal conditioner systems:
• AE119
• LS12x + ILS73x (HI => MIN. GAP 4 to 20 mA, LO => COM).

Sensor
power
supply

Signal
0V
Supply

External
power
supply

Figure 9-12: Connection diagram

Notes
1- Switch Sw1 is closed to allow current-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Current option.
2- Switch Sw2 is set to position 1. This connects the IOC4T card's sensor power supply to
the PS terminal, though in fact this terminal is not used.
the Sensor Power Supply field can be set to any powered option (+27 VDC, −27 VDC,
+15 VDC or +6.16 mA) but should preferably be set to +6.16 mA.
3- The operator must connect an external power supply to the transducer or transducer and
signal conditioner.

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9.2.5 Connection diagram for frequency generator

Sensor
power
supply

Frequency
generator

Figure 9-13: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Voltage option.
2- Switch Sw2 is set to position 1. This connects the IOC4T card's sensor power supply to
the PS terminal, though in fact this terminal is not used.
the Sensor Power Supply field can be set to any powered option (+27 VDC, −27 VDC,
+15 VDC or +6.16 mA) but should preferably be set to +6.16 mA.

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Connecting speed sensors

9.3 Connecting speed sensors

The IOC4T panel has four screw terminals for each of the two speed channels. These
terminals are as follows:

PS Power supply for transducer or signal conditioner.

HI
Differential input for the signal.
LO

SHIELD Terminal for connecting the shield of the transmission cable.

The MPC4 / IOC4T card pair can be used to power sensors having built-in or integrally
attached signal conditioners, providing the current requirement is ≤25 mA. In cases where
this built-in power supply capability is insufficient, an external power supply must be used.
Table 9-3 shows when this is necessary.

Table 9-3: Use of an internal (MPC4) or external power supply for

various types of speed sensors

Transducer and Connection

Output signal Rating Supplied by
signal conditioner diagram

Displacement probes used as speed sensors

0 to −20 V −20 to −32 V MPC4 / IOC4T Figure 9-16

TQ4xx + IQS45x
15 to 20 mA 25 mA max. MPC4 / IOC4T Figure 9-17

TQxxx + IQSxxx −24 VDC ±10%,

0 to −20 V External supply Figure 9-19
with GSI127 125 mA

TQxxx + IQSxxx −24 VDC ±10%,

0 to −20 V External supply Figure 9-20
with GSI124 85 mA
Note: According to API 670, the normal range is 0 to −22 V.

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9.3.1 General considerations

The IOC4T circuitry associated with the PS, HI, LO and SHIELD terminals (see Figure 9-15)
is configurable using the VM600 MPS software. More specifically, the fields found on the
property sheets for the Speed Channels node (a child of the Inputs node) in the tree
structure (left) are used to configure switch Sw1 automatically and appropriately for a variety
of applications and different types of transducer and/or signal conditioner (see Figure 9-14).

Figure 9-14: VM600 MPS software Speed Channels inputs window

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

Switch Sw1 is set according to whether a voltage-modulated or a current-modulated signal is

provided by the transducer or transducer and signal conditioner system:
• Voltage-modulated signal: Sw1 open.
• Current-modulated signal: Sw1 closed.
The position of Sw1 is determined by the setting of the Signal Transmission Mode field (see
Figure 9-14). The correct setting (current or voltage) is chosen automatically by the program
when standard transducers and signal conditioners from Meggitt Sensing Systems’
Vibro-Meter product line are selected (using the Sensor Type and Conditioner fields). For
non-Vibro-Meter devices, the operator must enter the appropriate setting (current or voltage)
in the Signal Transmission Mode field.
Unlike the Measurement channels inputs, the speed channel inputs do not have switch
Sw2, so the corresponding Speed Channels inputs windows (under the parent Inputs node)
do not have a Sensor Power Supply field. (The sensor power supply is always −27.2 V.)
The Sensor Connected field has no direct influence on the setting of Sw1. The field can be
considered as a comment for the user. When it is set to "No", the other fields in this VM600
MPS software window will be unavailable (that is, appear greyed out), but the values and
settings are still effective.

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SPEED
INPUT
-24.0V
Sensor
(−27.2 V only)
power
supply

Figure 9-15: Circuitry associated with speed channel inputs

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9.3.2 Connection diagrams for hardware powered by IOC4T / MPC4

9.3.2.1 Voltage-modulated signal

Applies to the following transducers or transducer and signal conditioner systems:
• TQ4xx + IQS45x.

SPEED
INPUT
Sensor
(−27.2 V only)
power
supply

Figure 9-16: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
For non-Vibro-Meter devices, the Signal Transmission Mode field has to be set to the
Voltage option.
2- The sensor power supply is always set to −27.2 V.

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9.3.2.2 Current-modulated signal

Applies to the following transducers or transducer and signal conditioner systems:
• TQ4xx + IQS45x.

SPEED
INPUT
(−27.2 V only) Sensor
power
supply

Figure 9-17: Connection diagram

Notes
1- Switch Sw1 is closed to allow current-modulated signals to be processed.
For non-Vibro-Meter devices, the Signal Transmission Mode field has to be set to the
Current option.
2- The sensor power supply is always set to −27.2 V.

NOTE: For speed/phase reference input channels, it can be more difficult to achieve the
minimum input voltage required when current is selected as the signal
transmission mode. Therefore, the 200 Ω current-to-voltage conversion resistor
used by the MPC4 card for current-modulated input signals should be used in any
system design calculations in order to ensure reliable detection.

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9.3.3 Connection diagrams for unpowered hardware

9.3.3.1 Voltage-modulated signal

Applies to generic sensors.

SPEED
INPUT
Sensor
(−27.2 V only)
power
supply

Figure 9-18: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
For non-Vibro-Meter devices, the Signal Transmission Mode field has to be set to the
Voltage option.
2- The sensor power supply is always set to −27.2 V.

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9.3.4 Connection diagrams for externally powered hardware

9.3.4.1 Voltage-modulated signal with GSI127 galvanic separation unit

Applies to the later versions of the following transducers or transducer and signal conditioner
systems:
• TQ4xx + IQS45x + GSI127 galvanic separation unit.

IOC4T MPC4
SPEED
INPUT Sensor
(−27.2 V only)
power
supply

GSI127
O/P
SIGNAL

0V
From sensor (transducer)
or measurement chain

+/COM
−
24 VDC

−/COM
I/P +

(+) (−)
External
power
supply

Figure 9-19: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Voltage option.
2- The operator must connect an external power supply to terminals “24 VDC +” and
“24 VDC −” of the GSI127 galvanic separation unit.
3- The sensor power supply is always set to −27.2 V.

NOTE: More detailed information on connecting equipment to an electronic monitoring

system can be found in the project-specific wiring diagram delivered with the
system or by referring to the electrical connections (wiring diagrams) section of the
appropriate sensors and signal conditioners installation manual.

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9.3.4.2 Voltage-modulated signal with GSIxxx galvanic separation unit

Applies to the earlier versions of the following transducers or transducer and signal
conditioner systems:
• TQ4xx + IQS45x + GSIxxx galvanic separation unit.

SPEED
INPUT Sensor
(−27.2 V only)
power
supply

External
power
supply

Figure 9-20: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Voltage option.
2- The operator must connect an external power supply to terminals 2 and 3 of the GSIxxx
galvanic separation unit.
3- The sensor power supply is always set to −27.2 V.

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9.3.4.3 Voltage-modulated signal with power supply and safety barrier unit
Applies to the following transducers or transducer and signal conditioner systems:
• TQ4xx + IQS45x + GSVxxx power supply and safety barrier unit.

External
power SPEED
supply INPUT Sensor
(−27.2 V only)
power
supply

Figure 9-21: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Voltage option.
2- The operator must connect an external power supply to terminals 1 and 2 of the GSVxxx
power supply and safety barrier unit.
3- The sensor power supply is always set to −27.2 V.

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9.3.5 Connection diagram for frequency generator

SPEED
INPUT Sensor
(−27.2 V only)
power
supply

Frequency
generator

Figure 9-22: Connection diagram

Notes
1- Switch Sw1 is open to allow voltage-modulated signals to be processed.
The Signal Transmission Mode field has to be set to the Voltage option.
2- The sensor power supply is always set to −27.2 V.

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CONFIGURATION OF MPC4 / IOC4T CARDS
Configuring the four local relays on the IOC4T

9.4 Configuring the four local relays on the IOC4T

Connector J2 of the IOC4T card has terminals for the following four relay outputs:
• RL1 – Pins 9 and 10 on connector J2
• RL2 – Pins 11 and 12 on connector J2
• RL3 – Pins 13 and 14 on connector J2
• RL4 – Pins 15 and 16 on connector J2.
Specific alarms can be attributed to these relays using the VM600 MPSx software.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

Specific alarms (A+, D− and so on) generated by an MPC4 card can be selected as control
signals for these local relays using the VM600 MPS software. The control signals are
generally low in the absence of an alarm, that is, in a “normal” state (which means that the
control signal is high-impedance), although there are exceptions to this rule as shown in
Table 9-4.
In the event of an alarm, the appropriate control signal changes state (which generally means
that the control signal is pulled low to ground).

Table 9-4: Normal state of “control signals” (in absence of alarm condition)

Normal Normal
Parameter Parameter
state state

Common OK (Common OK alarm

0 DSP Saturation Error 0
level)
Individual OK 1 Status Latched (Error Log) 0
Common Alert (Common Alert
0 Input Signal Error 0
alarm level)
Individual Alert 0 Input Saturation Error 0
Common Danger (Common
0 Common Mode Range Overflow 0
Danger alarm level)
Individual Danger 0 Invalid Output 0
TM, DB, AR 0 Speed Out Of Limit 0
MPC Card Running 1 Track Lost 0
Common Monitoring Failure 0 Track Out Of Range 0
Processing Error 0 PGA Saturation Error 0
Key: 0 = control signal in low state, 1 = control signal in high state.

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Configuring the four local relays on the IOC4T

As explained in 9.4.2 Operation of relays, jumpers must be set on the IOC4T card to
configure each relay as normally energised (NE) or normally de-energised (NDE), and as
normally open (NO) or normally closed (NC).
Table 9-5 shows the required jumper settings for IOC4T cards. See Figure 9-23 for an
electrical diagram showing the jumpers and Figure 9-24 for the position of the jumpers on the
IOC4T card.

Table 9-5: Jumper settings to configure relays as NE/NDE and NO/NC

Normal state of Jumper Jumper Relay Relay

control signal J100x J70x coil contact

1 1-2 1-2 NDE NO

1 1-2 1-3 NDE NC
1 1-3 1-2 NE NC
1 1-3 1-3 NE NO
0 1-2 1-2 NE NC
0 1-2 1-3 NE NO
0 1-3 1-2 NDE NO
0 1-3 1-3 NDE NC

9.4.1 Relay terminology

By convention, the normally closed (NC) and normally open (NO) relay terminology refers to
the state of the relay contacts when the relay’s coil is de-energised. This use of the word
“normally” is not directly related to the “normal” operation/state of the machinery being
monitored, as explained below.
When the power supply to a device is turned off:
• There is a closed circuit between the normally closed (NC) and common (COM) contacts.
• There is an open circuit between the normally open (NO) and common (COM) contacts.
When the power supply to a device is turned on, the state of the relay contacts depends on
whether the relay’s coil is energised or de-energised.
When the relay’s coil is energised:
• There is an open circuit between the normally closed (NC) and common (COM) contacts.
• There is a closed circuit between the normally open (NO) and common (COM) contacts.
Whether a relay’s coil is energised or de-energised depends on how the relay has been
configured, for example, as normally de-energised (NDE) or normally energised (NE) and as
latched or not latched. It also depends on the control signal that is used to drive the relay. For
example, specific alarms (A+, D− and so on) generated by an MPC4 card (see Table 9-4).

9.4.2 Operation of relays

A relay can be configured to be either normally de-energised (NDE) or normally energised
(NE).

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Configuring the four local relays on the IOC4T

Normally de-energised (NDE) and normally energised (NE) refer to the relay coil state (that
is, the relay switching circuit) when the hardware is powered and the signal driving the relay’s
control circuit is in a normal (non-alarm) state.
• For relays configured as normally de-energised (NDE), the control input to the relay’s coil
is off by default so there is a closed circuit between the NC and COM contacts (and an
open circuit between the NO and COM contacts) for a normal state.
• For relays configured as normally energised (NE), the control input to the relay’s coil is
on by default so there is an open circuit between the NC and COM contacts (and a closed
circuit between the NO and COM contacts) for a normal state.

NOTE: An advantage of normally energised (NE) relays is that the “de-energise to trip
principle” allows problems with hardware to be detected (for example, due to
power supply or wiring failures).

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Configuring the four local relays on the IOC4T

Jumpers J100x used to Jumpers J70x used to

select relay NE/NDE select relay contact NO/NC

Relay RL1

Control signal
(see note 1)

Relay RL2

Control signal
(see note 1)

Relay RL3

Control signal
(see note 1)

Relay RL4

Control signal
(see note 1)
IOC4T
panel

Notes
1. Specific alarms (A+, D− and so on) generated by the corresponding MPC4 card can be selected as the control
signal using the VM600 MPSx software. The normal state of the control signal is shown in Table 9-4.
2. See Table 9-5 for information on how to set the jumpers to obtain the desired operation.

Figure 9-23: Electrical diagram showing jumpers used to configure relays as NE/NDE and NO/NC

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CONFIGURATION OF MPC4 / IOC4T CARDS
Configuring the four local relays on the IOC4T

Configuration examples for relay RL1 using a a control signal with a normal state of 1
(see Table 9-4):

a. To configure RL1 to act as a normally energised (NE) relay with normally closed
(NC) contacts (see Table 9-5):
• Jumper J1005 has contacts 1-3 closed.
• Jumper J703 has contacts 1-2 closed.
In this case, RL1 provides a closed circuit when there is no alarm. It provides an
open circuit in the event of an alarm or power supply failure.

b. To configure RL1 to act as a normally de-energised (NDE) relay with normally closed
(NC) contacts (see Table 9-5):
• Jumper J1005 has contacts 1-2 closed.
• Jumper J703 has contacts 1-3 closed.
In this case, RL1 provides a closed circuit when there is no alarm or when there is a
power supply failure. It provides an open circuit in the event of an alarm.

Note: The J100x and J70x

jumper settings depend on the
normal state of the control
signal (see Table 9-4) and the
required operation of the relay
(see Table 9-5).

(Top of card)

Connector
J2

(Bottom of card)

Figure 9-24: Position of jumpers used to configure the IOC4T local relays as NE or NDE

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 CONFIGURATION OF MPC4 / IOC4T CARDS
Configuring the four DC outputs

9.5 Configuring the four DC outputs

The four DC outputs (DC OUT 1, DC OUT 2, DC OUT 3, DC OUT 4) on connector J3 of the
IOC4T card can be individually configured to provide either:
• A current-based signal in the range 4 to 20 mA
• A voltage-based signal in the range 0 to 10 V.
This is achieved by setting jumpers J1242, J1243, J1244, J1245 on the IOC4T card (see
Figure 9-26 and Figure 9-25):
• For a 4 to 20 mA output, place the jumper between contacts 1-2
• For a 0 to 10 V output, place the jumper between contacts 1-3.

Processed
signal *

Processed
signal *

Processed
signal *

Processed
signal *

* From single or dual channel Shows factory setting

Figure 9-25: Jumpers to select type of DC output (voltage-based or current-based)

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CONFIGURATION OF MPC4 / IOC4T CARDS
Configuring the four DC outputs

(Top of card)

Connector J3

(For DC OUT 1)

(Bottom of card)

Voltage mode (U)

0 to 10 V
Current mode (I)
4 to 20 mA

Figure 9-26: Position of jumpers on the IOC4T card related to the DC outputs

The DC outputs (DC OUT 1, DC OUT 2, DC OUT 3 and DC OUT 4) share a common
reference/return with the discrete signal interface (DSI) inputs (DB, TM and AR). This
common reference/return is known as RET and is available on Connector J3, Terminal 8
(see 9.1 Definition of screw terminals on the IOC4T card).

NOTE: The common reference/return (RET) signal has a voltage limit of ±2 V and a
current limit of 100 mA.
Accordingly, it is recommended to use galvanic separation between the RET on
the IOC4T card and any circuitry connected to the DC outputs if the potential
difference between RET and the external circuitry could be greater than 2 V.

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Buffered (raw) outputs

9.6 Buffered (raw) outputs

The IOC4T has four differential outputs providing buffered raw signals. These outputs are:
• RAW 1H (high line) Connector J3, Terminal 9
• RAW 1L (low line) Connector J3, Terminal 10
• RAW 2H (high line) Connector J3, Terminal 11
• RAW 2L (low line) Connector J3, Terminal 12
• RAW 3H (high line) Connector J3, Terminal 13
• RAW 3L (low line) Connector J3, Terminal 14
• RAW 4H (high line) Connector J3, Terminal 15
• RAW 4L (low line) Connector J3, Terminal 16.
The raw signals are derived from the signals coming from the sensors connected to
measurement channels 1 to 4 (connector J1 of the IOC4T card). These buffered signals are
identical to those available on the BNC connectors on the panel of the corresponding MPC4
card.
Refer to the MPC4 machinery protection card data sheet for further specifications.

9.7 DSI control inputs (DB, TM, AR)

These DSI control inputs are normally floating (open circuit).
To activate an input, connect it to the RET terminal (Connector J3, Terminal 8). This closes
the contact.
The input function as follows:
• Danger Bypass (DB) – A closed contact between the DB and RET terminals allows the
operator to inhibit the danger relay outputs.
• Trip Multiply (TM) – When there is a closed contact between the TM and RET terminals,
alarm levels are multiplied by a scale factor (software defined).
When TM is open, the scale factor is not taken into account.
• Alarm Reset (AR) – A closed contact between AR and RET inputs resets (clears) any
latched alarms.

NOTE: An externally generated Alarm Reset (AR) should be an aperiodic pulse-type

signal, that is, it should not be activated continuously.

The discrete signal interface (DSI) inputs (DB, TM and AR) share a common reference/return
with the DC outputs (DC OUT 1, DC OUT 2, DC OUT 3 and DC OUT 4). This common
reference/return is known as RET and is available on Connector J3, Terminal 8
(see 9.1 Definition of screw terminals on the IOC4T card).

NOTE: The common reference/return (RET) signal has a voltage limit of ±2 V and a
current limit of 100 mA.
Accordingly, it is recommended to use galvanic separation between the RET on
the IOC4T card and any circuitry connected to the discrete signal interface (DSI)
inputs if the potential difference between RET and the external circuitry could be
greater than 2 V.

For further information on the Danger Bypass function, see 4.6.5 Danger Bypass function
and for further information on the Direct Trip Multiply function, see 4.6.4 Direct Trip Multiply.

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CONFIGURATION OF MPC4 / IOC4T CARDS
Channel inhibit function

9.8 Channel inhibit function

The channel inhibit function can only be activated using software, that is, there is no
equivalent DSI input.
The channel inhibit function is activated when one of the VM600 MPS software packages
(MPS1 or MPS2) is used to send channel inhibit commands to individual MPC4 channels
(Communications > To MPC > Channel Inhibits).
Alternatively, Modbus can be used to control the channel inhibit function for a networked
VM600 machinery protection system (containing a CPUM card).
For further information on the channel inhibit function, see 4.6.6 Channel inhibit function.

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Slot number coding for IOC4T cards

9.9 Slot number coding for IOC4T cards

IOC4T cards use an electronic keying mechanism to help prevent them from being installed
in the wrong slot of a VM600 rack. Each IOC4T card has a bank of micro-switches that are
used to assign a slot number to the card, stored in the slot number (address) assignation
register.
The IOC4T card compares its slot number with the rack’s slot number (see Figure 2-2). The
result of the comparison is displayed on the SLOT ERROR LED on the cards panel:
• If the codes are identical, the LED is green.
• If the codes are not identical, the LED is red.

9.9.1 VM600 system rack (ABE04x)

When an IOC4T card is installed in a VM600 system rack (ABE04x), the micro-switches on
the card must be configured to match the rack slot (slot number) being used (see 2.1.2 Slot
number coding for cards in the rear of an ABE04x rack).
The example in Figure 9-27 shows the micro-switch settings required for an IOC4T card
installed in slot 11 of an ABE04x rack.

IOC4T card micro-switch settings for installation in slot 11 of an ABE04x rack

(Top of card)

ON

(To J3)
IOC4T

(Bottom of card)

Connector P4
Switches 5 to 8
not used
0
ON

Hole
LSB = Least-significant bit
MSB = Most-significant bit
Raised part
of switch 1 1 2 3 4 5 6 7 8
(LSB) (MSB) Switch number

Text etched on PCB

Figure 9-27: Micro-switches to assign the IOC4T slot number (ABE04x)

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CONFIGURATION OF MPC4 / IOC4T CARDS
Grounding options

9.9.2 VM600 slimline rack (ABE056)

When an IOC4T card is installed in a VM600 slimline rack (ABE056), the micro-switches on
the backplane of the rack must be configured to match the slot number configured for the card
(see 2.1.4 Slot number coding for cards in the rear of an ABE056 rack). This allows the
IOC4T to be used in an ABE056 rack without reconfiguring its slot number.

9.10Grounding options
Jumper J1015 on the IOC4T card (see Figure 9-28) allows the commoned (that is, connected
together) sensor shields to be connected to either:
• The case ground (chassis)
In this case, contacts 2-1 of J1015 must be shorted.
• The VME ground (0 VA)
In this case, contacts 1-3 of J1015 must be shorted.

Measurement
High-voltage channel 1
capacitor*
Measurement
Case ground channel 2
(chassis)
Sensor Measurement
shield channel 3

Measurement
J1016 J1015 channel 4

Speed
channel 1
VME ground
(0 VA ) Speed
channel 2
Default (factory) setting
SHIELD inputs
(commoned together
on IOC4T card)
Notes
*The standard version of the IOC4T card has a short-circuit between J1015 contact 2 and case ground.
*The separate circuits version of the IOC4T card has a high-voltage capacitor between J1015 contact 2 and case ground.
The J1016 jumper on the IOC4T card is reserved for system test and should not be changed by the user.

Figure 9-28: Jumper to configure grounding option

The location of the J1015 jumper on the IOC4T card can be found using Figure 9-29.

NOTE: For the standard version of an ABE04x rack with the standard version of an MPC4
card installed, the case ground (rack chassis) is connected to the VME ground
(0 VA) by jumper J701 on the MPC4.

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Using the Raw Bus to share measurement channel inputs

9.11Using the Raw Bus to share measurement channel inputs

The Raw Bus consists of 64 parallel bus lines, arranged as 32 differential line pairs. It allows
the raw analog signals coming from measurement transducers and devices connected to the
dynamic signal inputs of an IOC4T card (via the CH1, CH2, CH3 and CH4, accessible at the
rear of the ABE04x rack) to be placed on a Raw bus line pair. The dynamic signal input
(measurement channel) is subsequently available throughout the VM600 rack to be used as
an input by any other IOC card in the rack.
This feature is typically used to reduce external wiring requirements. For example, in a
VM600 rack featuring both MPS and CMS hardware, signals wired to the MPS cards
(externally) can be shared with the CMS cards over the Raw bus (internally).
The allocation of a specific Raw Bus line pair to a measurement channel is done by setting
jumpers on the IOC4T card (and on the IOC16T card – refer to the VM600 condition
monitoring system (CMS) hardware manual (MACMS-HW/E)). The mapping of the
measurement channels to the Raw Bus line pairs is summarised in Table 9-6, together with
the required jumper settings. The position of the relevant jumpers on the IOC4T card is shown
in Figure 9-29 with an explanation of which jumpers correspond to which Raw Bus lines
(see “measurement channel selection” on the right of the figure).
For information on the allocation of a specific Raw Bus line pair to a control signal line, see
9.12.2 Using the Raw Bus to switch relays.

Table 9-6: Raw bus lines and jumpers associated with measurement channels
for the MPC4 card

MPC4 measurement channel Raw Bus IOC4T jumper settings

(raw analog signal) line pair (contacts 1-3 closed)

Measurement channel 1 0 J300 and J301

Measurement channel 2 1 J302 and J303
Measurement channel 3 2 J304 and J305
Measurement channel 4 3 J306 and J307
Measurement channel 1 4 J308 and J309
Measurement channel 2 5 J310 and J311
Measurement channel 3 6 J312 and J313
Measurement channel 4 7 J314 and J315
Measurement channel 1 8 J316 and J317
Measurement channel 2 9 J318 and J319
Measurement channel 3 10 J320 and J321
Measurement channel 4 11 J322 and J323
Measurement channel 1 12 J324 and J325
Measurement channel 2 13 J326 and J327
Measurement channel 3 14 J328 and J329

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CONFIGURATION OF MPC4 / IOC4T CARDS
Using the Raw Bus to share measurement channel inputs

Table 9-6: Raw bus lines and jumpers associated with measurement channels
for the MPC4 card (continued)

MPC4 measurement channel Raw Bus IOC4T jumper settings

(raw analog signal) line pair (contacts 1-3 closed)
Measurement channel 4 15 J330 and J331
Measurement channel 1 16 J332 and J333
Measurement channel 2 17 J334 and J335
Measurement channel 3 18 J336 and J337
Measurement channel 4 19 J338 and J339
Measurement channel 1 20 J340 and J341
Measurement channel 2 21 J342 and J343
Measurement channel 3 22 J344 and J345
Measurement channel 4 23 J346 and J347
Measurement channel 1 24 J348 and J349
Measurement channel 2 25 J350 and J351
Measurement channel 3 26 J352 and J353
Measurement channel 4 27 J354 and J355
Measurement channel 1 28 J356 and J357
Measurement channel 2 29 J358 and J359
Measurement channel 3 30 J360 and J361
Measurement channel 4 31 J362 and J363

For example, to allocate Raw Bus line pair 7 for use with measurement channel 4 (that is, its
corresponding measurement channel), jumpers J314 and J315 should have contacts 1-3
closed.

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Using the Raw Bus to share measurement channel inputs

Relay selection Measurement channel selection

Contacts 1-2 closed: Contacts 1-3 closed:
Jumper settings to allocate a Jumper settings to allocate a
Raw Bus line pair to a Raw Bus line pair to a
specific relay specific raw analog signal
(measurement channel)

Connector J1 Connector J2

J1015
(Case ground)

2 1 3 (VME ground)

Relay J1016 Measurement channel

selection selection
H

(Bottom of card)
(Top of card)

This number matrix gives

the Raw Bus line pairs
corresponding to the jumper
matrix on the left.

IOC4T
Figure 9-29: Position of jumpers related to the Raw Bus on the IOC4T card

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CONFIGURATION OF MPC4 / IOC4T CARDS
Assigning alarm signals to relays on the RLC16 card

9.12Assigning alarm signals to relays on the RLC16 card

The IOC4T card contains the following four local relays for signalling alarms: RL1, RL2, RL3
and RL4.
Specific alarms can be attributed to these relays using the VM600 MPSx software.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

A large number of alarm signals can be processed by the MPS. The possible alarms are
summarised in the table below:

Figure 9-30: Available alarm signals (MPC4 / IOC4T card pair)

Channel 1 Channel 2 Channel 3 Channel 4 Dual Dual Speed Speed

O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P
1 2 1 2 1 2 1 2 1&2 3&4 1 2
Alert+
Alert−
Danger+ N/A N/A
Danger− N/A N/A
OK level
Channel
Status *

Basic logical combinations of alarms Up to 8 possibilities

Advanced logical combinations of alarms Up to 4 possibilities

Key:

= Alarm available
N/A = Alarm not available

* Channel Status = Processing Error, Track Lost and so on

Any of these alarm signals can be sent to the RLC16 card to switch relays. This is achieved
by either of the following two means:
1- Using the Open Collector Bus (OC Bus)
This is the normal method of switching relays. Hardware settings required for this method
are described in Section 9.12.1.
Refer also to 3.4.3 Open Collector Bus for a description of the OC Bus.
2- Using the Raw Bus
This method can be used if the 16 lines provided by the OC Bus are insufficient, or if only
a few relays are required for more than two MPC cards. This method is described in
9.12.2 Using the Raw Bus to switch relays.
Refer also to 3.4.4 Raw Bus for a description of the Raw Bus.

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 CONFIGURATION OF MPC4 / IOC4T CARDS
Assigning alarm signals to relays on the RLC16 card

9.12.1 Using the Open Collector Bus (OC Bus) to switch relays
Figure 9-31 shows the operating principle when the OC Bus is used to switch relays.

IOC in slot n+1 IOC in slot n RLC in slot m

n = {3, 5, 7, 9, 11 or 13} n = {3, 5, 7, 9, 11 or 13} m = {1, 2, 15, 16, 17 or 18}

Jumper
OC Bus matrix
(16 lines) (on RLC16)

Relay 1

Control signals Control signals Jumpers

(see note 1) (see note 1) to select
NE/NDE
Relay 16

RLC16
Notes panel
1. Specific alarms (A+, D− and so on) are attributed to the OC Bus lines using the
VM600 MPSx software. See Table 9-4 for information on the normal state of
the control signal.

Figure 9-31: Using the Open Collector Bus (OC Bus) to switch relays

The attribution of a specific alarm signal (generated by the MPC4 / IOC4T cards) to a control
signal line (and therefore to an OC Bus line) is done using the VM600 MPSx software.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

The attribution of a specific line on the OC Bus to a specific relay on the RLC16 is done by
setting a jumper on the RLC16 card. Additional jumpers allow the selection of relay normally
energised (NE) or normally de-energised (NDE). The jumper settings are summarised in
Table 9-7 and the position of the relevant jumpers on the RLC16 card is shown in
Figure 9-33.

NOTE: See 3.4.3 Open Collector Bus for further information on the OC Bus.

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CONFIGURATION OF MPC4 / IOC4T CARDS
Assigning alarm signals to relays on the RLC16 card

9.12.1.1 Configuration procedure (OC Bus)

To configure a particular relay on the RLC16 card using the OC Bus, proceed as follows:
1- Consult Table 9-7 (this lists the jumpers associated with each relay).
2- For the relay in question, set the appropriate jumper on the RLC16 card.
3- Set the appropriate jumper to configure the relay as normally energised (NE) or normally
de-energised (NDE).

NOTE: Make sure that either the NE or the NDE jumper is set. You cannot set both of them
together.

4- Using the VM600 MPS software, select the Discrete Outputs node (a child of the
Output Mapping node) in the tree structure (left). Then expand the RLC/OC bus node
in the main window (right) and select the relay in question (between 1 and 16). See
Figure 9-32.
5- Configure the Channel, Output and Status fields of this window.

Figure 9-32: VM600 MPS software window to configure the OC Bus

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

Configuration example
A user wants to assign the alarm signal “Danger+" generated on Output 1 of Channel 2 of a
given MPC4 card to Relay 7 on the RLC16 card. In addition, the user wants Relay 7 to be in
a normally energised (NE) state.
Relay 7 is selected by placing jumper J31 on the RLC16 card (see Table 9-7).
(Note that this operation actually selects OC Bus Line 6. This information, however, does not
normally concern the user, as the VM600 MPS software takes it into account.)
Placing jumper J88 ensures that Relay 7 is normally energised (see Table 9-7).
The user must then use the VM600 MPSx software to select Relay 7 from the 16 relays
available in the RLC/OC bus node. Then, the Danger+ alarm for Output 1 of Channel 2 can
be assigned to this relay (see Figure 9-32).

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 CONFIGURATION OF MPC4 / IOC4T CARDS
Assigning alarm signals to relays on the RLC16 card

(Top of card)

Connector J1

Relay numbers
(Bottom of card)
RLC16
Figure 9-33: Position of jumpers on the RLC16 card related to the OC Bus

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CONFIGURATION OF MPC4 / IOC4T CARDS
Assigning alarm signals to relays on the RLC16 card

9.12.2 Using the Raw Bus to switch relays

The Raw Bus can be used to supplement the OC Bus by allowing additional alarm signals to
be routed to the relays on the RLC16 card. (The Raw Bus is common to all IOC4T and RLC16
cards.)

MPS configuration example

An example illustrating the use of the Raw Bus is shown in Figure 9-34. In this example, four
MPC cards and their corresponding IOC cards are mounted in a rack. It is assumed that the
Open Collector Bus is used to convey alarm signals to relay cards RLC #1 to RLC #4. The
OC Bus lines are not shown on this drawing for the sake of clarity, but they affect the following
links (see 3.4.3 Open Collector Bus):
• IOC #1 in slot 3 connects to RLC #1 in slot 1
• IOC #2 in slot 5 connects to RLC #2 in slot 2
• IOC #3 in slot 7 connects to RLC #3 in slot 15
• IOC #4 in slot 9 connects to RLC #4 in slot 16.
The Raw Bus in this example is used to allow each IOC card to access half an RLC16 card:
• IOC #1 and IOC #2 can access RLC #5 via Raw Bus lines 31 to 16
• IOC #3 and IOC #4 can access RLC #6 via Raw Bus lines 47 to 32.

Rack Rack M M M M
power power P P P P
(Front card supply supply C C C C
cage) # # # #
4 3 2 1
RPS 6U RPS 6U
#2 #1

Raw Bus (7...0)

Raw Bus (15...8)
Raw Bus (23...16)
Raw Bus (31...24)
Raw Bus (39...32)
Raw Bus (47...40)
Raw Bus (55...48)
Raw Bus (63...56)

R R I I R I R I R R
(Rear card L L O O L O L O L L
cage) C C C C C C C C C C
# # # # # # # # # #
4 3 4 3 6 2 5 1 2 1
Slot 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RLC16 IOC4T, IOC8T, IRC4 or RLC16 IOCN
locations locations location

IRC4 or RLC16 IRC4 or RLC16

location locations

Figure 9-34: MPS configuration example showing use of the Raw Bus

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Assigning alarm signals to relays on the RLC16 card

Figure 9-35 shows the operating principle when the Raw Bus is used to switch relays.

64 lines

Raw Jumper Jumper

matrix matrix
Bus
(on IOC) (on RLC16)

Relay 1

Control signals Jumpers

(see note 1) to select
NE/NDE
Relay 16

RLC16
Notes panel
1. Specific alarms (A+, D− and so on) generated by the corresponding MPC4 card are
attributed to the control lines using the VM600 MPSx software. See Table 9-4 for
information on the normal state of the control signal.

Figure 9-35: Using the Raw Bus to switch relays

The allocation of a specific alarm signal (generated by the MPC4 / IOC4T cards) to a control
signal line is done using the VM600 MPSx software.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

The allocation of a specific Raw Bus line pair to a specific control signal line is done by setting
jumpers on the IOC4T card. The jumper settings are summarised in Table 9-7 and the
position of the relevant jumpers on the IOC4T card is shown in Figure 9-29 with an
explanation of which jumpers correspond to which Raw Bus lines (see “relay selection” on
the left of the figure).
For information on the allocation of a specific Raw Bus line pair to a measurement channel,
see 9.11 Using the Raw Bus to share measurement channel inputs.
The control signal is subsequently routed towards a specific relay on the RLC16 card by
setting a jumper on the RLC16. Additional jumpers on the RLC16 allow the selection of relay
normally energised (NE) or normally de-energised (NDE). The jumper settings are
summarised in Table 9-7 and the position of the relevant jumpers on the RLC16 card is
shown in Figure 9-29.

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CONFIGURATION OF MPC4 / IOC4T CARDS
Assigning alarm signals to relays on the RLC16 card

The IOC4T card drives the Raw Bus lines using open collector driver circuitry. These bus
lines do not have line terminations. (The principle is the same as for the Open Collector Bus,
see Figure 3-7.)

9.12.2.1 Configuration procedure (Raw Bus)

To configure a particular relay on the RLC16 card using the Raw Bus, proceed as follows:
1- Consult Table 9-7 (this lists the Raw Bus lines and jumpers associated with each relay).
2- Choose a free Raw Bus line from the four that are associated with that relay.
3- For the relay and Raw Bus line, set the appropriate jumper on the RLC16 card.
4- Set the appropriate jumper on the RLC16 card to configure the relay as normally
energised (NE) or normally de-energised (NDE).

NOTE: Make sure that either the NE or the NDE jumper is set. You cannot set both of them
together.

5- For the relay and Raw Bus line in question, set the appropriate jumper on the IOC4T
card.
6- Using the VM600 MPSx software, select the Discrete Outputs node (a child of the
Output Mapping node) in the tree structure (left). Then expand the RLC/Raw bus node
in the main window (right) and select the relay in question (between 1 and 16). See
Figure 9-36.
7- Configure the Channel, Output and Status fields of this window.

Figure 9-36: VM600 MPS software window to configure the Raw Bus

Configuration example
A user wants to assign the alarm signal "Danger+" generated on Output 1 of Channel 2 of a
given MPC4 card to Relay 7 on the RLC16 card. In addition, the user wants Relay 7 to be in
a normally energised (NE) state.
Table 9-7 shows that Raw Bus lines 35, 43, 51 and 59 are associated with Relay 7.
The choice of one of these four lines will be dictated by the hardware configuration of the
overall MPS, as certain bus lines may already be reserved for other functions. The desired
bus line is then selected by placing the appropriate jumper on the RLC16 card (J32, J33, J34
or J35 in the case of Relay 7).

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Assigning alarm signals to relays on the RLC16 card

For the sake of this example, we will assume that Raw Bus line 51 is chosen. Jumper J34
therefore has to be set on the RLC16 card.
Placing jumper J88 will ensure that Relay 7 is normally energised (see Table 9-7).
Jumper J338 now has to be set on the IOC4T card.
The user must then use the VM600 MPSx software to select Relay 7 from the 16 relays
available in the RLC/Raw bus node. Then, the Danger+ alarm for Output 1 of Channel 2 can
be assigned to this relay (see Figure 9-36).

(Top of card)

Connector J1

Relay numbers
(Bottom of card) RLC16
Figure 9-37: Position of jumpers on the RLC16 card related to the OC Bus and the Raw Bus

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Assigning alarm signals to relays on the RLC16 card

Table 9-7: Jumpers and bus lines associated with relays on the RLC16 card

Line number Jumper settings

On RLC16 Raw Bus

Relay On IOC4T signal line
OC Raw
number used
Bus Bus (see note 1 and To select the To set the To set the
(on RLC16) note 2)
(see note 2)
relay relay as NE relay as NDE

0 --- --- J1 J82 J81 ---

--- 32 J300 J2 J82 J81 0 High

1
--- 40 J316 J3 J82 J81 8 High

--- 48 J332 J4 J82 J81 16 High

--- 56 J348 J5 J82 J81 24 High

1 --- --- J6 J102 J101 ---

--- 0 J301 J7 J102 J101 0 Low

2
--- 8 J317 J8 J102 J101 8 Low

--- 16 J333 J9 J102 J101 16 Low

--- 24 J349 J10 J102 J101 24 Low

2 --- --- J11 J84 J83 ---

--- 33 J302 J12 J84 J83 1 High

3
--- 41 J318 J13 J84 J83 9 High

--- 49 J334 J14 J84 J83 17 High

--- 57 J350 J15 J84 J83 25 High

3 --- --- J16 J104 J103 ---

--- 1 J303 J17 J104 J103 1 Low

4
--- 9 J319 J18 J104 J103 9 Low

--- 17 J335 J19 J104 J103 17 Low

--- 25 J351 J20 J104 J103 25 Low

4 --- --- J21 J86 J85 ---

--- 34 J304 J22 J86 J85 2 High

5
--- 42 J320 J23 J86 J85 10 High

--- 50 J336 J24 J86 J85 18 High

--- 58 J352 J25 J86 J85 26 High

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Assigning alarm signals to relays on the RLC16 card

Table 9-7: Jumpers and bus lines associated with relays on the RLC16 card (continued)

Line number Jumper settings

On RLC16 Raw Bus

Relay On IOC4T signal line
OC Raw
number used
Bus Bus (see note 1 and To select the To set the To set the
(on RLC16) note 2)
(see note 2)
relay relay as NE relay as NDE

5 --- --- J26 J106 J105 ---

--- 2 J305 J27 J106 J105 2 Low

6
--- 10 J321 J28 J106 J105 10 Low

--- 18 J337 J29 J106 J105 18 Low

--- 26 J353 J30 J106 J105 26 Low

6 --- --- J31 J88 J87 ---

--- 35 J306 J32 J88 J87 3 High

7
--- 43 J322 J33 J88 J87 11 High

--- 51 J338 J34 J88 J87 19 High

--- 59 J354 J35 J88 J87 27 High

7 --- --- J36 J108 J107 ---

--- 3 J307 J37 J108 J107 3 Low

8
--- 11 J323 J38 J108 J107 11 Low

--- 19 J339 J39 J108 J107 19 Low

--- 27 J355 J40 J108 J107 27 Low

8 --- --- J41 J90 J89 ---

--- 36 J308 J42 J90 J89 4 High

9
--- 44 J324 J43 J90 J89 12 High

--- 52 J340 J44 J90 J89 20 High

--- 60 J356 J45 J90 J89 28 High

9 --- --- J46 J110 J109 ---

--- 4 J309 J47 J110 J109 4 Low

10
--- 12 J325 J48 J110 J109 12 Low

--- 20 J341 J49 J110 J109 20 Low

--- 28 J357 J50 J110 J109 28 Low

10 --- --- J51 J92 J91 ---

--- 37 J310 J52 J92 J91 5 High

11
--- 45 J326 J53 J92 J91 13 High

--- 53 J342 J54 J92 J91 21 High

--- 61 J358 J55 J92 J91 29 High

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Assigning alarm signals to relays on the RLC16 card

Table 9-7: Jumpers and bus lines associated with relays on the RLC16 card (continued)

Line number Jumper settings

On RLC16 Raw Bus

Relay On IOC4T signal line
OC Raw
number used
Bus Bus (see note 1 and To select the To set the To set the
(on RLC16) note 2)
(see note 2)
relay relay as NE relay as NDE

11 --- --- J56 J112 J111 ---

--- 5 J311 J57 J112 J111 5 Low

12
--- 13 J327 J58 J112 J111 13 Low

--- 21 J343 J59 J112 J111 21 Low

--- 29 J359 J60 J112 J111 29 Low

12 --- --- J61 J94 J93 ---

--- 38 J312 J62 J94 J93 6 High

13
--- 46 J328 J63 J94 J93 14 High

--- 54 J344 J64 J94 J93 22 High

--- 62 J360 J65 J94 J93 30 High

13 --- --- J66 J114 J113 ---

--- 6 J313 J67 J114 J113 6 Low

14
--- 14 J329 J68 J114 J113 14 Low

--- 22 J345 J69 J114 J113 22 Low

--- 30 J361 J70 J114 J113 30 Low

14 --- --- J71 J96 J95 ---

--- 39 J314 J72 J96 J95 7 High

15
--- 47 J330 J73 J96 J95 15 High

--- 55 J346 J74 J96 J95 23 High

--- 63 J362 J75 J96 J95 31 High

15 --- --- J76 J116 J115 ---

--- 7 J315 J77 J116 J115 7 Low

16
--- 15 J331 J78 J116 J115 15 Low

--- 23 J347 J79 J116 J115 23 Low

--- 31 J363 J80 J116 J115 31 Low

Notes
1. To attribute a Raw Bus line to a relay, the appropriate jumper must have contacts 1-2 closed.
2. To obtain a raw signal on a Raw Bus line, the appropriate jumper(s) must have contacts 1-3 closed. For differential signals,
two jumpers must be set. For example, for Raw Bus line 16, set J332 and J333 as they correspond to 16 High and 16 Low
respectively.

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Assigning alarm signals to relays on the IRC4 card

9.13Assigning alarm signals to relays on the IRC4 card

Unlike the RLC16 card, the local relays on the IRC4 are configured entirely under software
control, using the IRC4 Configurator software. That is, there are no jumpers that need to be
set on the IRC4 card (see Figure 12-1). Nevertheless the jumpers on the IOC4T card still
need to be configured manually.
The mapping of the OC and Raw buses in the VM600 MPS software is made using an RLC16
card that acts as an IRC4 card in order to create the configuration file (*.rck file). This file,
along with an Excel ® file (*.xls file) containing the logic equations, is used by the
IRC4 Configurator software to map the relays.

NOTE: Refer to the IRC4 configurator for intelligent relay cards software manual for further
information on how to configure (map) the relays on an IRC4 card.

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Definition of screw terminals on the IOC8T card

10 CONFIGURATION OF AMC8 / IOC8T CARDS

This chapter describes the connectors on the IOC8T card. These are accessed from the rear
of a VM600 MPS rack.
Typical sensor connection diagrams are included for thermocouples, RTD devices as well as
other sensors providing a voltage-based or current-based signal.
Information is also given on attributing specific alarm signals to specific relays on RLC16
cards using the Open Collector Bus and the Raw Bus.

10.1Definition of screw terminals on the IOC8T card

The IOC8T panel (rear of rack) contains four contact strips, identified as J1 to J4.
Strips J1 to J3 consist of a socket and a mating connector, which contains either 24 or 20
cage clamp terminals (see Figure 10-1). The terminals can accept wires with a cross section
of between 0.08 and 1.0 mm2. Strip J4 consists of a socket and a mating connector, which
contains 12 screw terminals. The terminals can accept wires with a cross section of
≤1.5 mm2.
The mating connectors are labelled “SLOT xx Jn” (where xx is the slot number and Jn = J1,
J2, J3 or J4) to enable the connector to be matched to the correct socket of the correct card.
Each socket and mating connector can be equipped with a mechanical key system to prevent
incorrect connection.
Further details on these screw terminal contacts can be found in Table 10-1.

Table 10-1: Definition of terminals for connectors J1 to J4 on the IOC8T card

Terminal Definition Terminal Definition

Connector J1: Connection of sensors 1 to 4

Channel 1 – Current Source

1 2 Channel 1 – Input (H)
Output (I)
3 Channel 1 – Input (R) 4 Channel 1 – Common Input (C)
5 Channel 1 – Shield (S) 6 Channel 1 – Chassis Ground
Channel 2 – Current Source
7 8 Channel 2 – Input (H)
Output (I)
9 Channel 2 – Input (R) 10 Channel 2 – Common Input (C)
11 Channel 2 – Shield (S) 12 Channel 2 – Chassis Ground
Channel 3 – Current Source
13 14 Channel 3 – Input (H)
Output (I)
15 Channel 3 – Input (R) 16 Channel 3 – Common Input (C)
17 Channel 3 – Shield (S) 18 Channel 3 – Chassis Ground
Channel 4 – Current Source
19 20 Channel 4 – Input (H)
Output (I)
21 Channel 4 – Input (R) 22 Channel 4 – Common Input (C)
23 Channel 4 – Shield (S) 24 Channel 4 – Chassis Ground

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Definition of screw terminals on the IOC8T card

Table 10-1: Definition of terminals for connectors J1 to J4 on the IOC8T card (continued)

Terminal Definition Terminal Definition

Connector J2: Connection of sensors 5 to 8

Channel 5 – Current Source

1 2 Channel 5 – Input (H)
Output (I)
3 Channel 5 – Input (R) 4 Channel 5 – Common Input (C)
5 Channel 5 – Shield (S) 6 Channel 5 – Chassis Ground
Channel 6 – Current Source
7 8 Channel 6 – Input (H)
Output (I)
9 Channel 6 – Input (R) 10 Channel 6 – Common Input (C)
11 Channel 6 – Shield (S) 12 Channel 6 – Chassis Ground
Channel 7 – Current Source
13 14 Channel 7 – Input (H)
Output (I)
15 Channel 7 – Input (R) 16 Channel 7 – Common Input (C)
17 Channel 7 – Shield (S) 18 Channel 7 – Chassis Ground
Channel 8 – Current Source
19 20 Channel 8 – Input (H)
Output (I)
21 Channel 8 – Input (R) 22 Channel 8 – Common Input (C)
23 Channel 8 – Shield (S) 24 Channel 8 – Chassis Ground

Connector J3: DC Outputs (DC OUT n) and DSI control inputs (AR and DB)

DC Output 1 (DC OUT 1) – DC Output 1 (DC OUT 1) –

1 2
Signal Return
DC Output 2 (DC OUT 2) – DC Output 2 (DC OUT 2) –
3 4
Signal Return
DC Output 3 (DC OUT 3) – DC Output 3 (DC OUT 3) –
5 6
Signal Return
DC Output 4 (DC OUT 4) – DC Output 4 (DC OUT 4) –
7 8
Signal Return
DC Output 5 (DC OUT 5) – DC Output 5 (DC OUT 5) –
9 10
Signal Return
DC Output 6 (DC OUT 6) – DC Output 6 (DC OUT 6) –
11 12
Signal Return
DC Output 7 (DC OUT 7) – DC Output 7 (DC OUT 7) –
13 14
Signal Return
DC Output 8 (DC OUT 8) – DC Output 8 (DC OUT 8) –
15 16
Signal Return
Alarm Reset (AR) – Return
17 Alarm Reset (AR) – Input 18
(0 V digital)
Danger Bypass (DB) – Return
19 Danger Bypass (DB) – Input 20
(0 V digital)

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Definition of screw terminals on the IOC8T card

Table 10-1: Definition of terminals for connectors J1 to J4 on the IOC8T card (continued)

Terminal Definition Terminal Definition

Connector J4: Relay contacts

1 Relay RL1 – NC contact (normally closed)

2 Relay RL1 – NO contact (normally open)
3 Relay RL1 – COM contact (common)
4 Relay RL2 – NC contact
5 Relay RL2 – NO contact
6 Relay RL2 – COM contact
7 Relay RL3 – NC contact
8 Relay RL3 – NO contact
9 Relay RL3 – COM contact
10 Relay RL4 – NC contact
11 Relay RL4 – NO contact
12 Relay RL4 – COM contact

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Definition of screw terminals on the IOC8T card

(1) (2)
I H
(3) (4) Connector J1
R C
(mating connector with 24
(5) (6) cage clamp terminals)
S Gnd
(7) (8)
I H
(9) (10)
R C
(11) (12)
S Gnd

Connector J2
Refer also to Table 10-1
(mating connector with 24
for full pin definitions
cage clamp terminals)

Connector J3
(mating connector with 20
cage clamp terminals)

Connector J4
(mating connector with
12 screw terminals)

Figure 10-1: View of IOC8T card showing definition of terminals (without mating connectors)

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10.2Connecting sensors to the IOC8T

The IOC8T panel has six terminals for each of the 8 measurement channels. These terminals
are as follows:
• I Current source output
• H Positive signal input
• R Measuring resistor input for current-based signals (4 to 20 mA)
• C Common input
• S Shield
• (Unnamed) A terminal for chassis ground.
Typical connection diagrams are shown below.

10.2.1 Setting of jumper J805

A measuring resistor (Rm) for current-based signals can be switched in across terminals R
and C by jumper J805. The setting of this jumper is not important for most connection cases,
apart from the following exceptions:
• The jumper must be removed for 4-wire RTD connection using the “true 4-wire
arrangement”. See Figure 10-7 (b).
• The jumper must be placed for measuring current-based signals. See Figure 10-8.

R
Rm Measuring resistor (50 Ω)

Jumper J805
C

Figure 10-2: Measuring resistor and jumper J805

Each channel has its own jumper J805. These are identified by a suffix (A to H) as follows:
Channel 1: Jumper J805_A Channel 5: Jumper J805_E
Channel 2: Jumper J805_B Channel 6: Jumper J805_F
Channel 3: Jumper J805_C Channel 7: Jumper J805_G
Channel 4: Jumper J805_D Channel 8: Jumper J805_H.
The position of these jumpers on the IOC8T is shown in Figure 10-3.

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(Top of card, component side)

J805_A

(To P3) J805_B

J1
J805_C

J805_D

1
2

J805_E

J805_F

J2
J805_G

J805_H

J3

(Bottom of card)

Figure 10-3: Position of jumpers J805_x on IOC8T card

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10.2.2 Connecting thermocouples

The operating principle of a thermocouple (TC) is based on the Seebeck effect. If two
dissimilar metal wires are soldered together at one end (the “hot” junction), a voltage in the
mV range will be generated across the free ends (the “cold” junction). This voltage is
proportional to the difference in temperature between the hot and cold junctions. The
temperature of the cold junction should be measured by another sensor (preferably a RTD
device) and this signal is then used for compensation purposes. This technique is known as
cold junction compensation (CJC).
The hot junction is placed at the measuring point. The cold junction should ideally be on a
terminal strip placed in an isothermal box, that is, one in which there is a negligible
temperature difference between the junctions on the terminal pins, creating a negligible
voltage error.
Another temperature sensor measures the internal temperature of the box, near the terminal
strip. This is processed by another channel on the AMC8 card and used for cold junction
compensation (2 out of the 8 channels on the AMC8 can be configured for CJC purposes
using the VM600 MPS software).

Thermocouple Isothermal box

Metal “B”
Hot junction I

Thot Metal “A”

R
Note: Usually the cold
junction is merged with the C
lower terminal (shown here Tcold
as a “white dot”). Connect to
CJC channel S
The representation shown
here is simply for clarity.

NOTE: The setting of jumper J805 is unimportant.

Figure 10-4: Wiring for thermocouple with CJC

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Connecting sensors to the IOC8T

10.2.3 Connecting RTD devices

An RTD (resistance temperature detector) is a metal wire resistor whose resistance varies
with temperature in a precisely known manner. A known current is injected into the device
and the resulting voltage across the resistor is measured.
Several connection possibilities exist:
1- 3-wire connection (see Figure 10-5)
This is the most common arrangement and takes the form of a bridge connection. It
requires a shielded, 3-core cable. It uses two equal injection currents (i1 and i2) which
allow compensation of the opposing voltages on RL1 and RL2. It is insensitive to line
resistance provided that RL1 = RL2 and i1 = i2.
A disadvantage of the technique is that corroded contacts can make RL1 and RL2
different, thereby inducing measurement errors.
2- 2-wire connection (see Figure 10-6)
This is the worst arrangement as it is very sensitive to line resistance. Despite this, it is
quite commonly used with RTDs having a low resistance value (for example, Cu10). It is
often built into the stator of old hydro alternators. The 2-wire technique demands high
performance on the part of the measuring chain.
3- 4-wire connections (see Figure 10-7)
This arrangement (also known as “Kelvin connection”) is the best and the least sensitive
to disturbances. The current path and voltage path are well separated. The arrangement
is insensitive to corroded contacts.
In the 3-wire plus shield arrangement (case (a) of Figure 10-7), the measuring current return
flows through the shield. In terms of EMC, this is less favourable than the true 4-wire
arrangement (case (b) of Figure 10-7).

RL1 i1
I

RL2 i2
H

R
RL4
C

NOTE: The setting of jumper J805 is unimportant.

Figure 10-5: 3-wire RTD connection

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RL1 i
I

RL4 i
C

NOTE: The setting of jumper J805 is unimportant.

Figure 10-6: 2-wire RTD connection

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(a) 3-wire plus shield arrangement

RL1 i
I

RL2
H
NOTE: The setting of jumper J805 is
unimportant.
RL3
R

RL4 i
C

(b) True 4-wire arrangement

RL1 i
I

RL2
H

NOTE: Jumper J805 must be removed.

RL3
R
RL4 i
C

Figure 10-7: 4-wire RTD connections

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10.2.4 Connecting other sensors (process values)

The AMC8 / IOC8T card pair can process signals coming from a variety of other devices such
as flow rate detectors, fluid level detectors and so on. The pair can process current-based
and voltage-based signals.

10.2.4.1 Current-based signal

Devices that output a current-based signal (4 to 20 mA) should be connected to the IOC8T
as shown in Figure 10-8.

Iout
R
Measurement Measuring
system COM resistor (50 Ω)
C
Jumper J805

NOTE: Jumper J805 must be placed to switch in the measuring resistor.

Figure 10-8: Connection of systems that output a current-based signal

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Connecting sensors to the IOC8T

10.2.4.2 Voltage-based signal

Devices that output a voltage-based signal (0 to 10 V) should be connected to the IOC8T as
shown in Figure 10-9.

Vout
R
Measurement
system
COM C

NOTE: The setting of jumper J805 is unimportant.

Figure 10-9: Connection of systems that output a voltage-based signal

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Configuring the four local relays on the IOC8T

10.3Configuring the four local relays on the IOC8T

Connector J4 of the IOC8T card has terminals for the following four relay outputs:
• RL1 – Pins 1, 2 and 3 on connector J4
• RL2 – Pins 4, 5 and 6 on connector J4
• RL3 – Pins 7, 8 and 9 on connector J4
• RL4 – Pins 10, 11 and 12 on connector J4.
Specific alarms can be attributed to these relays using the VM600 MPSx software.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

As explained in 9.4.2 Operation of relays, micro-switches must be set on the IOC8T card to
configure each relay as normally energised (NE) or normally de-energised (NDE).
See Figure 10-10 for the position of the micro-switches on the IOC8T card.

10.3.1 Relay terminology

See 9.4.1 Relay terminology.

10.3.2 Operation of relays

See 9.4.2 Operation of relays.

10.4Configuring the eight DC outputs

The eight DC outputs (DC OUT 1 to DC OUT 8) on connector J3 of the IOC8T card are
factory configured to provide a current-based output (4 to 20 mA).
Optionally, all eight can be configured as voltage-based outputs (0 to 10 V). This requires the
setting of a solder bridge on the IOC8T card.
Note that it is not possible to have a mixture of current-based and voltage-based outputs.

NOTE: Contact your nearest Meggitt Sensing Systems representative for further
information.

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DSI control inputs (DB, AR)

10.5DSI control inputs (DB, AR)

These DSI control inputs are normally floating (open circuit).
To activate a function, connect the appropriate “Input” and “Return” terminals together to
close the contact.
The inputs function as follows:
• Danger Bypass (DB): A closed contact between the DB Input and DB Return terminals
allows the operator to inhibit the danger relay outputs.
DB Input = Connector J3, Terminal 19
DB Return = Connector J3, Terminal 20.
• Alarm Reset (AR): A closed contact between the AR Input and AR Return terminals
resets latched alarms.
AR Input = Connector J3, Terminal 17
AR Return = Connector J3, Terminal 18.

NOTE: An externally generated Alarm Reset (AR) should be an aperiodic pulse-type

signal, that is, it should not be activated continuously.

For further information on the Danger Bypass function, see 4.6.5 Danger Bypass function.

10.6Channel inhibit function

The channel inhibit function can only be activated using software, that is, there is no
equivalent DSI input.
The channel inhibit function is activated when one of the VM600 MPS software packages
(MPS1 or MPS2) is used to send channel inhibit commands to individual AMC8 channels
(Communications > To AMC > Channel Inhibits).
Alternatively, Modbus can be used to control the channel inhibit function for a networked
VM600 machinery protection system (containing a CPUM card).
For further information on the channel inhibit function, see 5.7.4 Channel inhibit function.

10.7Slot number coding for IOC8T cards

IOC8T cards use an electronic keying mechanism to help prevent them from being installed
in the wrong slot of a VM600 rack. Each IOC8T card has a bank of micro-switches that are
used to assign a slot number to the card, stored in the slot number (address) assignation
register.
The IOC8T card compares its slot number with the rack’s slot number (see Figure 2-2). The
result of the comparison is displayed on the SLOT ERROR LED on the cards panel:
• If the codes are identical, the LED is green.
• If the codes are not identical, the LED is red.

10.7.1 VM600 system rack (ABE04x)

When an IOC8T card is installed in a VM600 system rack (ABE04x), the micro-switches on
the card must be configured to match the rack slot (slot number) being used (see 2.1.2 Slot
number coding for cards in the rear of an ABE04x rack).
The example in Figure 10-10 shows the micro-switch settings required for an IOC8T card
installed in slot 11 of an ABE04x rack.

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IOC8T card micro-switch settings for installation in slot 11 (code = 1 0 1 1)

of an ABE04x rack

MSB LSB
(Top of card)

IOC8T

Connector P4

(To J4)

(Bottom of card)
Text etched on PCB
RL4
RL3
RL2
RL1
Switch number

Raised part of switch

LSB = Least-significant bit
MSB = Most-significant bit
Hole

Switches 5 to 8
On=NDE
Off=NE

Figure 10-10: Position of micro-switches to assign the IOC8T slot number (ABE04x)
and configure relays as NE/NDE

NOTE: Pay attention to the polarity of the micro-switches!

Note that “0" corresponds to ON.

10.7.2 VM600 slimline rack (ABE056)

When an IOC8T card is installed in a VM600 slimline rack (ABE056), the micro-switches on
the backplane of the rack must be configured to match the slot number configured for the card
(see 2.1.4 Slot number coding for cards in the rear of an ABE056 rack). This allows the
IOC8T to be used in an ABE056 rack without reconfiguring its slot number.

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Assigning alarm signals to relays on the RLC16 card

10.8Assigning alarm signals to relays on the RLC16 card

The IOC8T card contains the following four local relays for signalling alarms: RL1, RL2, RL3
and RL4.
Specific alarms can be attributed to these relays using the VM600 MPSx software.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

A large number of alarm signals can be processed by the MPS. The possible alarms are
summarised in the table below:
Figure 10-11: Available alarm signals (AMC8 / IOC8T card pair)

Individual channels Multi-channels

1 2 3 4 5 6 7 8 1 2 3 4
Alert+
Alert−
Danger+
Danger−
Global
Channel OK
Channel
Status *

Basic logical combinations of alarms Up to 16 possibilities

Advanced logical combinations of alarms Up to 8 possibilities

Key:

= Alarm available
N/A = Alarm not available

* Channel Status = AMC Configuration Not Running, Alarm Reset and so on.

Any of these alarm signals can be sent to the RLC16 card to switch relays. This is achieved
by either of the following two means:
1- Using the Open Collector Bus (OC Bus)
This is the normal method of switching relays. Hardware settings required for this method are
described in 10.8.1 Using the Open Collector Bus (OC Bus) to switch relays.
Refer also to 3.4.3 Open Collector Bus for a description of the OC Bus.
2- Using the Raw Bus
This method can be used if the 16 lines provided by the OC Bus are insufficient, or if only a
few relays are required for more than two MPC cards. This method is described in
10.8.2 Using the Raw Bus to switch relays.
Refer also to 3.4.4 Raw Bus for a description of the Raw Bus.

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10.8.1 Using the Open Collector Bus (OC Bus) to switch relays
Figure 10-12 shows the operating principle when the OC Bus is used to switch relays.

IOC in slot n+1 IOC in slot n RLC in slot m

n = {3, 5, 7, 9, 11 or 13} n = {3, 5, 7, 9, 11 or 13} m = {1, 2, 15, 16, 17 or 18}

Jumper
OC Bus matrix
(16 lines) (on RLC16)

Relay 1

Control signals Control signals Jumpers

(see note 1) (see note 1) to select
NE/NDE
Relay 16

RLC16
Notes
1. Specific alarms (A+, D− and so on) are attributed to the OC Bus lines using the
panel
VM600 MPSx software. The control signals are low during normal operation
(in the absence of an alarm or other problem).

Figure 10-12: Using the Open Collector Bus (OC Bus) to switch relays

The attribution of a specific alarm signal (generated by the AMC8 / IOC8T cards) to a control
signal line (and therefore to an OC Bus line) is done using the VM600 MPSx software.
These alarm signals include Alert, Danger, Global Channel OK Fail, AMC Configuration Not
Running, Status Latched. During normal operation (that is, when no alarms/problems
present) the corresponding control signals are low. They become high when an alarm or other
problem is detected.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

The attribution of a specific line on the OC Bus to a specific relay on the RLC16 is done by
setting a jumper on the RLC16 card. Additional jumpers allow the selection of relay normally
energised (NE) or normally de-energised (NDE). The jumper settings are summarised in
Table 10-2 and the position of the relevant jumpers on the RLC16 card is shown in
Figure 10-14.

NOTE: See 3.4.3 Open Collector Bus for further information on the OC Bus.

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CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the RLC16 card

10.8.1.1 Configuration procedure (OC Bus)

To configure a particular relay on the RLC16 card using the OC Bus, proceed as follows:
1- Consult Table 10-2 (this lists the jumpers associated with each relay).
2- For the relay in question, set the appropriate jumper on the RLC16 card.
3- Set the appropriate jumper to configure the relay as normally energised (NE) or normally
de-energised (NDE).

NOTE: Make sure that either the NE or the NDE jumper is set. You cannot set both of them
together.

4- Using the VM600 MPSx software, select the Discrete Outputs node (a child of the
Output Mapping node) in the tree structure (left). Then expand the RLC/OC bus node
in the main window (right) and select the relay in question (between 1 and 16). See
Figure 10-13.
5- Configure the Source and Type fields of this window.

Figure 10-13: VM600 MPS software window to configure the OC Bus

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

Configuration example
A user wants to assign the alarm signal “Danger+" generated on Multi-Channel 1 of a given
AMC8 card to Relay 7 on the RLC16 card. In addition, the user wants Relay 7 to be in a
normally energised (NE) state.
Relay 7 is selected by placing jumper J31 on the RLC16 card (see Table 10-2).
(Note that this operation actually selects OC Bus Line 6. This information, however, does not
normally concern the user, as the VM600 MPS software takes it into account.)
Placing jumper J88 will ensure that Relay 7 is normally energised (see Table 10-2).
The user must then use the VM600 MPSx software to select Relay 7 from the 16 relays
available in the RLC/OC bus node. Then, the Danger+ alarm for Multi-Channel 1 can be
assigned to this relay (see Figure 10-13).

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 CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the RLC16 card

(Top of card)

Connector J1

Relay numbers
(Bottom of card)

Figure 10-14: Position of jumpers on the RLC16 card related to the OC Bus

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CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the RLC16 card

10.8.2 Using the Raw Bus to switch relays

The Raw Bus can be used to supplement the OC Bus by allowing additional alarm signals to
be routed to the relays on the RLC16 card. (The Raw Bus is common to all IOC8T and RLC16
cards.)

MPS configuration example

An example illustrating the use of the Raw Bus is shown in Figure 10-15. In this example, four
AMC8 cards and their corresponding IOC8T cards are mounted in a rack. It is assumed that
the Open Collector Bus is used to convey alarm signals to relay cards RLC #1 to RLC #4.
The OC Bus lines are not shown on this drawing for the sake of clarity, but they effect the
following links (see 3.4.3 Open Collector Bus):
• IOC #1 in slot 3 connects to RLC #1 in slot 1
• IOC #2 in slot 5 connects to RLC #2 in slot 2
• IOC #3 in slot 7 connects to RLC #3 in slot 15
• IOC #4 in slot 9 connects to RLC #4 in slot 16.
The Raw Bus in this example is used to allow each IOC card to access half an RLC card:
• IOC #1 and IOC #2 can access RLC #5 via Raw Bus lines 31 to 16
• IOC #3 and IOC #4 can access RLC #6 via Raw Bus lines 47 to 32.

Rack Rack A A A A
power power M M M M
(Front card supply supply C C C C
cage) # # # #
4 3 2 1
RPS 6U RPS 6U
#2 #1

Raw Bus (7...0)

Raw Bus (15...8)
Raw Bus (23...16)
Raw Bus (31...24)
Raw Bus (39...32)
Raw Bus (47...40)
Raw Bus (55...48)
Raw Bus (63...56)

R R I I R I R I R R
(Rear card L L O O L O L O L L
cage) C C C C C C C C C C
# # # # # # # # # #
4 3 4 3 6 2 5 1 2 1
Slot 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RLC16 IOC4T, IOC8T, IRC4 or RLC16 IOCN
locations locations location

IRC4 or RLC16 IRC4 or RLC16

locations locations

Figure 10-15: MPS configuration example showing use of the Raw Bus

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 CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the RLC16 card

Figure 10-16 shows the operating principle when the Raw Bus is used to switch relays.

64 lines

Raw Jumper Jumper

Bus matrix matrix
(on IOC) (on RLC16)

Relay 1

Control Jumpers
signals to select
(see note 1) NE/NDE
Relay 16

RLC16
Notes panel
1. Specific alarms (A+, D− and so on) generated by the corresponding AMC8 card are
attributed to the control lines using the VM600 MPSx software. The control signals are
low during normal operation (in the absence of an alarm or other problem).

Figure 10-16: Using the Raw Bus to switch relays

The attribution of a specific alarm signal (generated by the AMC8 / IOC8T cards) to a control
signal line is done using the VM600 MPSx software.
These alarm signals include Alert, Danger, Global Channel OK Fail, AMC Configuration Not
Running, Status Latched. During normal operation (that is, when no alarms/problems
present) the corresponding control signals are low. They become high when an alarm or other
problem is detected.

NOTE: Refer to the relevant manual for further information: VM600 MPS1 software
manual or VM600 MPS2 software manual.

The attribution of a specific control signal line to a specific Raw Bus line is done by setting a
jumper on the IOC8T card. The jumper settings are summarised in Table 10-2 and the
position of the relevant jumpers on the IOC8T card is shown in Figure 10-18.
The control signal is subsequently routed towards a specific relay on the RLC16 card by
setting a jumper on the RLC16. Additional jumpers on the RLC16 allow the selection of relay
normally energised (NE) or normally de-energised (NDE). The jumper settings are
summarised in Table 10-2 and the position of the relevant jumpers on the RLC16 card is
shown in Figure 10-19.
The IOC8T card drives the Raw Bus lines using open collector driver circuitry. These bus
lines do not have line terminations. (The principle is the same as for the Open Collector Bus,
see Figure 3-7.)

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CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the RLC16 card

10.8.2.1 Configuration procedure (Raw Bus)

To configure a particular relay on the RLC16 card using the Raw Bus, proceed as follows:
1- Consult Table 10-2 (this lists the Raw Bus lines and jumpers associated with each relay).
2- Choose a free Raw Bus line from the four that are associated with that relay.
3- For the relay and Raw Bus line in question, set the appropriate jumper on the RLC16
card.
4- Set the appropriate jumper on the RLC16 card to configure the relay as normally
energised (NE) or normally de-energised (NDE).

NOTE: Make sure that either the NE or the NDE jumper is set. You cannot set both of them
together.

5- For the relay and Raw Bus line in question, set the appropriate jumper on the IOC8T
card.
6- Using the VM600 MPSx software, select the Discrete Outputs node (a child of the
Output Mapping node) in the tree structure (left). Then expand the RLC/Raw bus node
in the main window (right) and select the relay in question (between 1 and 16).
See Figure 10-17.
7- Configure the Source and Type fields of this window.

Figure 10-17: VM600 MPS software window to configure the Raw Bus

Configuration example
A user wants to assign the alarm signal “Danger+" generated on Multi-Channel 1 of a given
AMC8 card to Relay 7 on the RLC16 card. In addition, the user wants Relay 7 to be in a
normally-energised (NE) state.
Table 10-2 shows that Raw Bus lines 35, 43, 51 and 59 are associated with Relay 7.
The choice of one of these four lines will be dictated by the hardware configuration of the
overall MPS, as certain bus lines may already be reserved for other functions. The desired
bus line is then selected by placing the appropriate jumper on the RLC16 card (J32, J33, J34
or J35 in the case of Relay 7).
For the sake of this example, we will assume that Raw Bus line 51 is chosen. Jumper J34
therefore has to be set on the RLC16 card.

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 CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the RLC16 card

Placing jumper J88 will ensure that Relay 7 is normally energised (see Table 10-2).
Jumper J138 now has to be set on the IOC8T card.
The user must then use the VM600 MPSx software to select Relay 7 from the 16 relays
available in the RLC/Raw bus node. Then, the Danger+ alarm for Multi-Channel 1 can be
assigned to this relay (see Figure 10-17).

IOC8T
(Top of card, component side)

To P3 To J1

Relay Raw Bus Raw Bus Raw Bus

number “low” “high” line pairs

2 1 J101 J100 0
4 3 J103 J102 1
6 5 J105 J104 2
8 7 J107 J106 3
10 9 J109 J108 4
12 11 J111 J110 5
14 13 J113 J112 6
16 15 J115 J114 7

2 1 J117 J116 8
4 3 J119 J118 9
6 5 J121 J120 10
8 7 J123 J122 11
10 9 J125 J124 12
12 11 J127 J126 13
14 13 J129 J128 14
16 15 J131 J130 15

2 1 J133 J132 16
4 3 J135 J134 17
6 5 J137 J136 18
8 7 J139 J138 19
10 9 J141 J140 20
12 11 J143 J142 21
14 13 J145 J144 22
16 15 J147 J146 23

2 1 J149 J148 24
4 3 J151 J150 25
6 5 J153 J152 26
8 7 J155 J154 27
10 9 J157 J156 28
12 11 J159 J158 29
14 13 J161 J160 30
16 15 J163 J162 31

(Bottom of card)
1 2 Raw Bus line pairs are indicated.
For example:
Raw Bus line 25 high (H) = jumper J150
Raw Bus line 25 low (L) = jumper J151

Figure 10-18: Position of jumpers on the IOC8T card related to the Raw Bus lines

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CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the RLC16 card

(Top of card)

Connector J1

Relay numbers
(Bottom of card)

Figure 10-19: Position of jumpers on the RLC16 card related to the OC Bus and the Raw Bus

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 CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the RLC16 card

Table 10-2: Jumpers and bus lines associated with relays on RLC16 card

Line number Jumper settings

On RLC16
Relay On IOC8T Raw Bus
OC Raw
number (on signal line
Bus Bus To select the To set the To set the
RLC16) (see note 1) used
relay relay NE relay NDE

0 --- --- J1 J82 J81 ---

--- 32 J100 J2 J82 J81 0 High

1
--- 40 J116 J3 J82 J81 8 High

--- 48 J132 J4 J82 J81 16 High

--- 56 J148 J5 J82 J81 24 High

1 --- --- J6 J102 J101 ---

--- 0 J101 J7 J102 J101 0 Low

2
--- 8 J117 J8 J102 J101 8 Low

--- 16 J133 J9 J102 J101 16 Low

--- 24 J149 J10 J102 J101 24 Low

2 --- --- J11 J84 J83 ---

--- 33 J102 J12 J84 J83 1 High

3
--- 41 J118 J13 J84 J83 9 High

--- 49 J134 J14 J84 J83 17 High

--- 57 J150 J15 J84 J83 25 High

3 --- --- J16 J104 J103 ---

--- 1 J103 J17 J104 J103 1 Low

4
--- 9 J119 J18 J104 J103 9 Low

--- 17 J135 J19 J104 J103 17 Low

--- 25 J151 J20 J104 J103 25 Low

4 --- --- J21 J86 J85 ---

--- 34 J104 J22 J86 J85 2 High

5
--- 42 J120 J23 J86 J85 10 High

--- 50 J136 J24 J86 J85 18 High

--- 58 J152 J25 J86 J85 26 High

5 --- --- J26 J106 J105 ---

--- 2 J105 J27 J106 J105 2 Low

6
--- 10 J121 J28 J106 J105 10 Low

--- 18 J137 J29 J106 J105 18 Low

--- 26 J153 J30 J106 J105 26 Low

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CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the RLC16 card

Table 10-2: Jumpers and bus lines associated with relays on RLC16 card (continued)

Line number Jumper settings

On RLC16
Relay On IOC8T Raw Bus
OC Raw
number (on signal line
Bus Bus To select the To set the To set the
RLC16) (see note 1) used
relay relay NE relay NDE

6 --- --- J31 J88 J87 ---

--- 35 J106 J32 J88 J87 3 High

7
--- 43 J122 J33 J88 J87 11 High

--- 51 J138 J34 J88 J87 19 High

--- 59 J154 J35 J88 J87 27 High

7 --- --- J36 J108 J107 ---

--- 3 J107 J37 J108 J107 3 Low

8
--- 11 J123 J38 J108 J107 11 Low

--- 19 J139 J39 J108 J107 19 Low

--- 27 J155 J40 J108 J107 27 Low

8 --- --- J41 J90 J89 ---

--- 36 J108 J42 J90 J89 4 High

9
--- 44 J124 J43 J90 J89 12 High

--- 52 J140 J44 J90 J89 20 High

--- 60 J156 J45 J90 J89 28 High

9 --- --- J46 J110 J109 ---

--- 4 J109 J47 J110 J109 4 Low

10
--- 12 J125 J48 J110 J109 12 Low

--- 20 J141 J49 J110 J109 20 Low

--- 28 J157 J50 J110 J109 28 Low

10 --- --- J51 J92 J91 ---

--- 37 J110 J52 J92 J91 5 High

11
--- 45 J126 J53 J92 J91 13 High

--- 53 J142 J54 J92 J91 21 High

--- 61 J158 J55 J92 J91 29 High

11 --- --- J56 J112 J111 ---

--- 5 J111 J57 J112 J111 5 Low

12
--- 13 J127 J58 J112 J111 13 Low

--- 21 J143 J59 J112 J111 21 Low

--- 29 J159 J60 J112 J111 29 Low

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 CONFIGURATION OF AMC8 / IOC8T CARDS
Assigning alarm signals to relays on the IRC4 card

Table 10-2: Jumpers and bus lines associated with relays on RLC16 card (continued)

Line number Jumper settings

On RLC16
Relay On IOC8T Raw Bus
OC Raw
number (on signal line
Bus Bus To select the To set the To set the
RLC16) (see note 1) used
relay relay NE relay NDE

12 --- --- J61 J94 J93 ---

--- 38 J112 J62 J94 J93 6 High

13
--- 46 J128 J63 J94 J93 14 High

--- 54 J144 J64 J94 J93 22 High

--- 62 J160 J65 J94 J93 30 High

13 --- --- J66 J114 J113 ---

--- 6 J113 J67 J114 J113 6 Low

14
--- 14 J129 J68 J114 J113 14 Low

--- 22 J145 J69 J114 J113 22 Low

--- 30 J161 J70 J114 J113 30 Low

14 --- --- J71 J96 J95 ---

--- 39 J114 J72 J96 J95 7 High

15
--- 47 J130 J73 J96 J95 15 High

--- 55 J146 J74 J96 J95 23 High

--- 63 J162 J75 J96 J95 31 High

15 --- --- J76 J116 J115 ---

--- 7 J115 J77 J116 J115 7 Low

16
--- 15 J131 J78 J116 J115 15 Low

--- 23 J147 J79 J116 J115 23 Low

--- 31 J163 J80 J116 J115 31 Low

Notes
1. To attribute a Raw Bus line to a relay, the appropriate jumper must have contacts 1-2 closed.

10.9Assigning alarm signals to relays on the IRC4 card

Unlike the RLC16 card, the local relays on the IRC4 are configured entirely under software
control, using the IRC4 Configurator software. That is, there are no jumpers that need to be
set on the IRC4 card (see Figure 12-1). Nevertheless the jumpers on the IOC4T card still
need to be configured manually.
The mapping of the OC and Raw buses in the VM600 MPS software is made using an RLC16
card that acts as an IRC4 card in order to create the configuration file (*.rck file). This file,
along with an Excel ® file (*.xls file) containing the logic equations, is used by the IRC4
Configurator software to map the relays.
Refer to the IRC4 configurator for intelligent relay cards software manual for further
information on how to configure (map) the relays on an IRC4 card.

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Assigning alarm signals to relays on the IRC4 card

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 USING THE RLC16 CARD
Definition of screw terminals on the RLC16 card

11 USING THE RLC16 CARD

This chapter describes the connectors on the RLC16 card. These are accessed from the rear
of a VM600 MPS rack.

11.1Definition of screw terminals on the RLC16 card

The RLC16 panel (rear of rack) contains three terminal strips, identified as J1, J2 and J3 (see
Figure 11-1). Each strip consists of a socket and a mating connector, which contains 16
screw terminals. The screw terminals can accept wires with a cross section of ≤1.5 mm2.
Each socket and mating connector can be equipped with a mechanical key system to prevent
incorrect connection.
Further details on these screw terminal contacts can be found in Table 11-1.

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USING THE RLC16 CARD
Definition of screw terminals on the RLC16 card

Connector J1
(terminal strip with 16
screw terminals)

Connector J2
(terminal strip with 16
screw terminals)

Connector J3
(terminal strip with 16
screw terminals)

Figure 11-1: View of RLC16 card showing definition of terminals

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 USING THE RLC16 CARD
Definition of screw terminals on the RLC16 card

Table 11-1: Definition of terminals for J1, J2 and J3 on the RLC16 card

Terminal Name Definition

Connector J1
1 RL1 Relay 1 NC (normally closed) contact
2 RL1 Relay 1 NO (normally open) contact
3 RL1 Relay 1 COM (common) contact
4 RL2 Relay 2 NC
5 RL2 Relay 2 NO
6 RL2 Relay 2 COM
7 RL3 Relay 3 NC
8 RL3 Relay 3 NO
9 RL3 Relay 3 COM
10 RL4 Relay 4 NC
11 RL4 Relay 4 NO
12 RL4 Relay 4 COM
13 RL5 Relay 5 NC
14 RL5 Relay 5 NO
15 RL5 Relay 5 COM
16 RL6 Relay 6 NC
Connector J2
1 RL6 Relay 6 NO
2 RL6 Relay 6 COM
3 RL7 Relay 7 NC
4 RL7 Relay 7 NO
5 RL7 Relay 7 COM
6 RL8 Relay 8 NC
7 RL8 Relay 8 NO
8 RL8 Relay 8 COM
9 RL9 Relay 9 NC
10 RL9 Relay 9 NO
11 RL9 Relay 9 COM
12 RL10 Relay 10 NC
13 RL10 Relay 10 NO
14 RL10 Relay 10 COM

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USING THE RLC16 CARD
Connecting the RLC16 relays

Table 11-1: Definition of terminals for J1, J2 and J3 on the RLC16 card (continued)

Terminal Name Definition

15 RL11 Relay 11 NC
16 RL11 Relay 11 NO
Connector J3
1 RL11 Relay 11 COM
2 RL12 Relay 12 NC
3 RL12 Relay 12 NO
4 RL12 Relay 12 COM
5 RL13 Relay 13 NC
6 RL13 Relay 13 NO
7 RL13 Relay 13 COM
8 RL14 Relay 14 NC
9 RL14 Relay 14 NO
10 RL14 Relay 14 COM
11 RL15 Relay 15 NC
12 RL15 Relay 15 NO
13 RL15 Relay 15 COM
14 RL16 Relay 16 NC
15 RL16 Relay 16 NO
16 RL16 Relay 16 COM

11.2Connecting the RLC16 relays

The RLC16 panel has three screw terminals for each of its 16 relays. These terminals are as
follows:
• NC – The normally closed relay contact
• NO – The normally open relay contact
• COM – The common relay contact.
The actual behaviour of each individual relay depends on the jumpers on the RLC16 card.
For example, a relay can be configured to be normally energised (NE) or normally
de-energised (NDE).

11.2.1 Relay terminology

See 9.4.1 Relay terminology.

11.2.2 Operation of relays

See 9.4.2 Operation of relays.

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 USING THE RLC16 CARD
Configuring the RLC16 card

11.3Configuring the RLC16 card

The RLC16 is used to supplement the on-board (local) relays on IOC4T and IOC8T cards.
The jumpers on the RLC16 must be set up at the same time as these cards are configured.
For this reason, the configuration of the RLC16 card is described in the chapters concerning
the MPC4 / IOC4T and AMC8 / IOC8T card pairs.

NOTE: See 9.12 Assigning alarm signals to relays on the RLC16 card and 10.8 Assigning
alarm signals to relays on the RLC16 card for further information.

11.4Slot number coding for RLC16 cards

The RLC16 card does not contain any electronic keying mechanism to prevent it being
installed in the wrong slot of a VM600 rack. This is because the RLC16 does not contain any
intelligence (that is, it is not programmed with a configuration) and does not function as a card
pair (such as the MPC4 / IOC4T or AMC8 / IOC8T).
Although RLC16 cards can be installed in almost every slot of a rack (see 8.2 Attribution of
slots in the rack), the actual slot location of an RLC16 card in a configured system is dictated
by the Open Collector (OC) Bus (see 3.4.3 Open Collector Bus) and other details of the
VM600 MPS system configuration.

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Slot number coding for RLC16 cards

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 USING THE IRC4 CARD
General block diagram

12 USING THE IRC4 CARD

This chapter describes the connectors on the IRC4 card. These are accessed from the rear
of a VM600 MPS rack.
Information is also given on attributing specific alarm signals to specific relays on IRC4 cards
using the Open Collector Bus and the Raw Bus.

12.1General block diagram

A block diagram of the IRC4 card is shown in Figure 12-1. It shows an IRC4 installed in the
rear of a rack and connected to the Raw and OC buses.

16

RLY1
Input
64 protection

8x

RLY8
4
Logic

DB
Schmitt Input AR
protection DSI 1
triggers
Slot number DSI 4
Rack slot number (connector P4)

(micro-switch)
Raw Bus (connector P3)

DIAG
OC Bus (connector P3)

Micro-controller

Figure 12-1: Block diagram of the IRC4 card

12.2Definition of the screw terminals on the IRC4 card

The IRC4 panel (rear of rack) card contains two terminal strips, J1 and J2 (see Figure 12-2).
Each strip consists of a socket and a mating connector, which contains 16 screw terminals.
The screw terminals can accept wires with a cross section of ≤1.5 mm2.
Each socket and mating connector can be equipped with a mechanical key system to prevent
incorrect connection.
Further details on the connectors can be found in Table 12-1.

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USING THE IRC4 CARD
Definition of the screw terminals on the IRC4 card

RLY1

RLY2

RLY3 Connector J1
(terminal strip with 16
RLY4 screw terminals)

DB

RLY5

RLY6

RLY7 Connector J2
(terminal strip with 16
RLY8 screw terminals)

Connector
(DCE 9-pin D-sub,
female)

Connector
(8P8C (RJ45)), female)
Note: Reserved for future use

IRC 4

Figure 12-2: View of IRC4 card showing definition of connectors

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 USING THE IRC4 CARD
Definition of the screw terminals on the IRC4 card

Table 12-1: Definition of connectors on the IRC4 card

Terminal Name Definition

Connector J1
1 RL1 Relay 1 NO (normally open) contact
2 RL1 Relay 1 NC (normally closed) contact
3 RL1 Relay 1 COM contact
4 RL2 Relay 2 NO
5 RL2 Relay 2 NC
6 RL2 Relay 2 COM
7 RL3 Relay 3 NO
8 RL3 Relay 3 NC
9 RL3 Relay 3 COM
10 RL4 Relay 4 NO
11 RL4 Relay 4 NC
12 RL4 Relay 4 COM
13 DB Danger Bypass input (control line)
14 DSI1 Discrete signal interface control input 1 (control line)
15 DSI2 Discrete signal interface control input 2 (control line)
16 GND Chassis ground (return line for DB, AR and other DSI inputs)
Connector J2
1 RL5 Relay 5 NO
2 RL5 Relay 5 NC
3 RL5 Relay 5 COM
4 RL6 Relay 6 NO
5 RL6 Relay 6 NC
6 RL6 Relay 6 COM
7 RL7 Relay 7 NO
8 RL7 Relay 7 NC
9 RL7 Relay 7 COM
10 RL8 Relay 8 NO
11 RL8 Relay 8 NC
12 RL8 Relay 8 COM
13 AR Alarm Reset input (control line)
14 DSI3 Discrete signal interface control input 3 (control line)

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USING THE IRC4 CARD
Connecting relays to the IRC4 card

Table 12-1: Definition of connectors on the IRC4 card (continued)

Terminal Name Definition

15 DSI4 Discrete signal interface control input 4 (control line)

16 GND Chassis ground (return line for DB, AR and other DSI inputs)
Connector (serial)
1-9 RS-232 serial port for communication with the IRC4 card
Connector (Ethernet)
Reserved for future use

12.3Connecting relays to the IRC4 card

The IRC4 panel has three screw terminals for each of its eight relays. These terminals are as
follows:
• NO – The normally open relay contact
• NC – The normally closed relay contact
• COM – The common relay contact.
The actual behaviour of each individual relay depends on the configuration of the IRC4 card.
For example, a relay can be the configured to be normally energised (NE) or normally
de-energised (NDE).
Using the IRC4 Configurator software, the eight relays of the IRC4 card can be configured to
function as either:
• Eight single-pole double-throw (SPDT) relays
• Four double-pole double-throw (DPDT) relays.

12.3.1 Relay terminology

See 9.4.1 Relay terminology.

12.3.2 Operation of relays

See 9.4.2 Operation of relays.

12.4Configuring the IRC4 card

The IRC4 is used to supplement the on-board (local) relays on the IOC4T and IOC8T cards
when complex logic equations using MPC4 and AMC8 card outputs, and external discrete
signal interface control inputs, are required.
For this reason, some information on the configuration of the IRC4 card is given in the
chapters concerning the MPC4 / IOC4T and AMC8 / IOC8T card pairs.
However, the IRC4 card contains no jumpers and the local relays on the card are configured
entirely under software control, using the IRC4 Configurator software.

NOTE: See 9.13 Assigning alarm signals to relays on the IRC4 card, 10.9 Assigning alarm
signals to relays on the IRC4 card and the IRC4 Configurator for Intelligent Relay
Cards software manual for further information.

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 USING THE IRC4 CARD
Slot number coding for IRC4 cards

12.5Slot number coding for IRC4 cards

IRC4 cards use an electronic keying mechanism to help prevent them from being installed in
the wrong slot of a VM600 rack. Each IRC4 card has a bank of micro-switches that are used
to assign a slot number to the card, stored in the slot number (address) assignation register.
The IRC4 card compares its slot number with the rack’s slot number (see Figure 2-2). The
result of the comparison is displayed on the DIAG LED on the cards panel:
• If the codes are identical, the LED is green.
• If the codes are not identical, the LED is red.
The electronic keying mechanism also helps to ensure that the IRC4 Configurator software
communicates with and configures the correct IRC4 card.

12.5.1 VM600 system rack (ABE04x)

When an IRC4 card is installed in a VM600 system rack (ABE04x), the micro-switches on the
card must be configured to match the rack slot (slot number) being used (see 2.1.2 Slot
number coding for cards in the rear of an ABE04x rack).
The example in Figure 12-3 shows the micro-switch settings required for an IRC4 card
installed in slot 11 of an ABE04x rack.

IRC4 card micro-switch settings for installation in slot 11 of an ABE04x rack

(Top of card)

IRC4 (To RS-232

and Ethernet
connectors)
Connector P4
(Bottom of card)
Switches 5 to
8 not used (MSB) (LSB)
8 6 7 4 5 2 3 1
Raised part
Switch of switch
number
Hole
ON
LSB = Least significant bit
Text etched on PCB MSB = Most significant bit

Figure 12-3: Micro-switches to assign the IRC4 slot number (ABE04x)

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USING THE IRC4 CARD
Slot number coding for IRC4 cards

THIS PAGE INTENTIONALLY LEFT BLANK

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 CONFIGURATION OF CPUM / IOCN CARDS
Configuring Ethernet communications

13 CONFIGURATION OF CPUM / IOCN CARDS

Jumpers on the CPUM and IOCN cards are used to configure the external communications
interfaces. Refer also to the block diagrams in 6 CPUM / IOCN card pair.

13.1Configuring Ethernet communications

Primary Ethernet communications can be routed via either the ‘NET’ connector on the CPUM
card’s panel or the ‘1’ connector on the IOCN card’s panel.
The choice is made using jumpers J42, J40, J52 and J53 on the CPUM card.
The location of the jumpers on the CPUM card can be found using Figure 13-13 or
Figure 13-14.

J42
J40
(a) The NET Ethernet connector on panel of CPUM is selected
J52
J53

J42
(b) The 1 Ethernet connector on panel of IOCN is selected
J40
J52
NOTE: This is the default factory setting.
J53

Figure 13-1: CPUM card jumper settings to select the Ethernet connector

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CONFIGURATION OF CPUM / IOCN CARDS
Configuring RS serial communications

13.2Configuring RS serial communications

Secondary serial communications (RS-232 or RS-485) via the ‘RS’ connector on the IOCN
card’s panel is configured using jumpers on the CPUM card.

13.2.1 RS-232 selection

This is the simplest configuration as the lines coming from the PC/104 CPU module are
routed directly to the P2 connector.
RS-232 communication is configured by bypassing the RS-232 to RS-485 converter on the
CPUM card. The converter is switched out using jumpers J43, J45 and J41 (see Figure 13-2).
The location of the jumpers on the CPUM card can be found using Figure 13-13 or
Figure 13-14.

J28 J29

J43
J34
J45
J33
J41
J32
J31
J44
J38 J46
J37 J39
J36
J35

Figure 13-2: CPUM card jumper settings to select RS-232 (RS connector)

13.2.2 RS-485 selection, half-duplex (2-wire) configuration

Half-duplex (2-wire) RS-485 communications is configured by using the RS-232 to RS-485
converter on the CPUM card. The converter is switched in using jumpers J28, J29, J44, J46
and J39 (see Figure 13-3).
Jumpers J31 to J34 can also be set if terminations are needed (see Figure 13-9).
The location of the jumpers on the CPUM card can be found using Figure 13-13 or
Figure 13-14.

NOTE: In the Meggitt Sensing Systems’ factory, the default configuration for CPUM/IOCN
card pairs is full-duplex RS-485, with each differential pair terminated with a 120 Ω
resistor (see case (b) of Figure 13-9).
CPUM and IOCN card pairs will be delivered with the default configuration, unless
a different one is specified by the customer.

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 CONFIGURATION OF CPUM / IOCN CARDS
Configuring RS serial communications

J28 J29

J43
J34
Set if J45
J33
terminations J41
needed J32
J31
J44
J38 J46
J37 J39
J36
J35

Figure 13-3: CPUM card jumper settings to select half-duplex RS-485 (RS connector)

13.2.3 RS-485 selection, full-duplex (4-wire) configuration

The jumper settings for full-duplex (4-wire) RS-485 communications are similar to those for
half-duplex except for the position of jumper J29 (see Figure 13-3 and Figure 13-4).
If terminations are needed, jumper groups J31 to J34 and J35 to J38 should have the same
configuration, that is, J31 should be set like J35, J32 like J36, J33 like J37 and J34 like J38.
The location of the jumpers on the CPUM card can be found using Figure 13-13 or
Figure 13-14.

NOTE: In the Meggitt Sensing Systems’ factory, the default configuration for CPUM/IOCN
card pairs is full-duplex RS-485, with each differential pair terminated with a 120 Ω
resistor (see case (b) of Figure 13-9).
CPUM and IOCN card pairs will be delivered with the default configuration, unless
a different one is specified by the customer.

J28 J29

J43
J34
J45
J33
J41
J32
Set if J31
terminations J44
needed J38 J46
J37 J39
J36
J35

Figure 13-4: CPUM card jumper settings to select full-duplex RS-485 (RS connector)

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CONFIGURATION OF CPUM / IOCN CARDS
Configuring A and B serial communications

13.3Configuring A and B serial communications

An optional serial communications module (AIM104-COM4 or equivalent) can be fitted to the
CPUM card in order to support additional serial connections that can be used to configure
multi-drop RS-485 networks of VM600 racks.
Additional serial communications (RS-485) via the group ‘A’ (two connectors) and group ‘B’
(two connectors) on the IOCN card’s panel can be configured as either half-duplex (2-wire)
or full-duplex (4-wire) using jumpers on the serial communications module itself.
As shown in Figure 13-5, Figure 13-6, Figure 13-7 and Figure 13-8, jumper groups LK1, LK2,
LK3, LK4, LK5, LK6, LK7 and LK8 are used to configure factory settings and do not need to
be changed by the user.
Jumper group LK6 is used to configure the serial communications module (AIM104-COM4 or
equivalent) for operation with different versions of the CPUM card. LK6 (AB0) must be
removed for later versions of the CPUM card fitted with the PFM-541I or equivalent CPU
module, or LK6 (AB0) must be inserted for earlier versions of the CPUM card fitted with the
MSM586EN or equivalent CPU module.
Jumper groups LK9 and LK11 are used to configure RS-485 communications for connector
group A and jumper goups LK10 and LK12 are used to configure RS-485 communications
for connector group B.
Jumper groups LK13 and LK15 are used to configure the terminations for connector group A
and jumper goups LK14 and LK16 are used for connector group B.

NOTE: The configuration of each communication port (connector groups A and B) can be
set independently. For example, connector group A can be configured as
half-duplex and connector group B configured as full-duplex (or vice versa) at the
same time.

The jumper settings for half-duplex or full-duplex RS-485 communications are very similar.
The only difference is that in full-duplex mode, jumpers LK9 and LK10 must be changed.

13.3.1 RS-485 selection, half-duplex (2-wire) configuration

The serial communications module (AIM104-COM4 or equivalent) jumper settings to select
half-duplex RS-485 communications for the A and B connectors depends on the version of
the CPUM card being used:
• For later versions of the CPUM card fitted with the PFM-541I or equivalent CPU module,
the jumpers and terminations should be set as shown in Figure 13-5.
• For earlier versions of the CPUM card fitted with the MSM586EN or equivalent CPU
module, the jumpers and terminations should be set as shown in Figure 13-6.

13.3.2 RS-485 selection, full-duplex (4-wire) configuration

The serial communications module (AIM104-COM4 or equivalent) jumper settings to select
full-duplex RS-485 communications for the A and B connectors depends on the version of the
CPUM card being used:
• For later versions of the CPUM card fitted with the PFM-541I or equivalent CPU module,
the jumpers and terminations should be set as shown in Figure 13-7.
• For earlier versions of the CPUM card fitted with the MSM586EN or equivalent CPU
module, the jumpers and terminations should be set as shown in Figure 13-8.

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 CONFIGURATION OF CPUM / IOCN CARDS
Configuring A and B serial communications

D0
PL2 C0
PL4 A1
B1

LK5

LK4

LK3

LK2 PL3
3 4 5 7 9 10 11 15

LK8 (For connector

LK1
LK1 A9
group B)
A8 A A LK14 LK16
A7 LK10 LK12 D D
A6 B B C C
A5 B B
A4 A A

CD1 D
CD0 C
AB1 B
LK13 LK15
AB0 A D D
A A
C C
LK6 LK7 LK9 LK11 B B
B B
A A
(For connector
group A)

Figure 13-5: Serial communications module jumper settings to select half-duplex RS-485
communications for later versions of the CPUM card (PFM-541I or equivalent)

D0
PL2 C0
PL4 A1
B1

LK5

LK4

LK3

LK2 PL3
3 4 5 7 9 10 11 15

LK8 (For connector

LK1
LK1 A9
group B)
A8 A A LK14 LK16
A7 LK10 LK12 D D
A6 B B C C
A5 B B
A4 A A

CD1 D
CD0 C
AB1 B
LK13 LK15
AB0 A D D
A A
C C
LK6 LK7 LK9 LK11 B B
B B A A
(For connector
group A)

Figure 13-6: Serial communications module jumper settings to select half-duplex RS-485
communications for earlier versions of the CPUM card (MSM586EN or equivalent)

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CONFIGURATION OF CPUM / IOCN CARDS
Configuring A and B serial communications

D0
PL2 C0
PL4 A1
B1

LK5

LK4

LK3

LK2 PL3
3 4 5 7 9 10 11 15

LK8 (For connector

LK1
LK1 A9
group B)
A8 A A LK14 LK16
A7 LK10 LK12 D D
A6 B B C C
A5 B B
A4 A A

CD1 D
CD0 C
AB1 B
LK13 LK15
AB0 A D D
A A
C C
LK6 LK7 LK9 LK11 B B
B B
A A
(For connector
group A)

Figure 13-7: Serial communications module jumper settings to select full-duplex RS-485
communications for later versions of the CPUM card (PFM-541I or equivalent)

D0
PL2 C0
PL4 A1
B1

LK5

LK4

LK3

LK2 PL3
3 4 5 7 9 10 11 15

LK8 (For connector

LK1
LK1 A9
group B)
A8 A A LK14 LK16
A7 LK10 LK12 D D
A6 B B C C
A5 B B
A4 A A

CD1 D
CD0 C
AB1 B
LK13 LK15
AB0 A D D
A A
C C
LK6 LK7 LK9 LK11 B B
B B A A
(For connector
group A)

Figure 13-8: Serial communications module jumper settings to select full-duplex RS-485
communications for earlier versions of the CPUM card (MSM586EN or equivalent)

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 CONFIGURATION OF CPUM / IOCN CARDS
Configuring RS-485 terminations for RS, A and B serial communications

13.4Configuring RS-485 terminations for RS, A and B serial communications

For RS serial communications (RS-485 only), and A and B serial communications, jumpers
on the CPUM card are used to configure terminations.
Each RS-485 differential pair can be terminated in one of six ways, as shown in Figure 13-9.

LK13 to
LK16
J31 (J35) A
(a) Not terminated
J32 (J36) B UART Line driver connects directly to the
J33 (J37) C pin differential pair.
J34 (J38) D

LK13 to
LK16
J31 (J35) A
A (b) Terminated
J32 (J36) B UART Differential pair is terminated with 120 Ω
J33 (J37) C pin 120Ω
resistance between the signal lines.
B
J34 (J38) D
NOTE: This is the default factory
setting.
LK13 to
LK16 5VF
J31 (J35) A
4.7K A (c) Pulled inactive
J32 (J36) B UART Differential pair is pulled apart to mimic no
J33 (J37) C pin character being transmitted from UART.
B
J34 (J38) D
4.7K

LK13 to
LK16 5VF
J31 (J35) A (d) Pulled inactive and terminated
4.7K A
J32 (J36) B UART Differential pair is terminated with 120 Ω and
J33 (J37) C pin 120Ω is pulled apart to mimic no character being
B
J34 (J38) D transmitted.
4.7K

LK13 to
LK16 5VF
J31 (J35) A 4.7K
A (e) Pulled active
J32 (J36) B UART Differential pair is pulled apart to mimic
J33 (J37) C pin UART sending a break condition.
B
J34 (J38) D
4.7K

LK13 to
LK16 5VF
J31 (J35) A 4.7K
A (f) Pulled active and terminated
J32 (J36) B UART Differential pair is terminated with 120 Ω and
J33 (J37) C pin 120Ω is pulled apart to mimic a break condition.
B
J34 (J38) D
4.7K

Figure 13-9: CPUM card jumper settings for various types of RS-485 terminations

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CONFIGURATION OF CPUM / IOCN CARDS
Configuring RS-485 terminations for RS, A and B serial communications

13.4.1 CPUM card (carrier board)

For half-duplex RS-485 (2-wire), only jumpers J31 to J34 need to be configured.
For full-duplex RS-485 (4-wire), jumper groups J31 to J34 and J35 to J38 and must be
configured identically.
Further details on RS-485 terminations can be found in Table 13-1.

13.4.2 Optional serial communications module (AIM104-COM4 or equivalent)

For half-duplex RS-485 (2-wire), only jumpers LK15 and LK16 need to be configured. These
groups should be configured identically
For full-duplex RS-485 (4-wire), jumper groups LK13 and LK15, and LK14 and LK16 must be
configured identically.
Further details on RS-485 terminations can be found in Table 13-1.

Table 13-1: RS-485 terminations

Serial
Type of
communications Jumper location Jumpers
RS-485
(connector)

Half-duplex CPUM card

RS J31 to J34
(2-wire) (carrier board)
Optional serial
Half-duplex communications module
A LK15
(2-wire) (AIM104-COM4 or
equivalent)
Optional serial
Half-duplex communications module
B LK16
(2-wire) (AIM104-COM4 or
equivalent)
Full-duplex CPUM card J31 to J34 and
RS
(4-wire) (carrier board) J35 to J38
Optional serial
Full-duplex communications module
A LK13 and LK15
(4-wire) (AIM104-COM4 or
equivalent)
Optional serial
Full-duplex communications module
B LK14 and LK16
(4-wire) (AIM104-COM4 or
equivalent)

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 CONFIGURATION OF CPUM / IOCN CARDS
Additional jumpers on the IOCN card

13.5Additional jumpers on the IOCN card

13.5.1 Linking the RS and A serial communications connectors

On the IOCN card, the RS connector used for secondary serial communications (RS-232 or
RS-485) can be linked pin-by-pin to the two group A connectors.

NOTE: Linking the RS and A serial communications connectors requires that the optional
serial communications module (AIM104-COM4 or equivalent) is not fitted to the
CPUM card so that two group A connectors are available.
Linking the RS and A serial communications connectors in this way is the only way
that RS-232 signals can be used with the group A connectors.

The RS and A serial communications connectors are linked using jumpers J20 to J24 on the
IOCN card, as shown in Figure 13-10.
The location of the jumpers on the IOCN card can be found using Figure 13-15.

J20
J21 (a) RS connector linked to the two A connectors
J22
J23 NOTE: This is the default factory setting.
J24

J20
J21
J22 (b) Independent RS and A connectors

J23
J24 Part of IOCN panel showing
the RS and A connectors

Figure 13-10: IOCN card jumpers to link the RS and A connectors

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CONFIGURATION OF CPUM / IOCN CARDS
Connectors on the IOCN card

13.6Connectors on the IOCN card

NOTE: The pin definitions shown in Figure 13-11 and Figure 13-12 are for the connectors
(female) on the IOCN card’s panel, such as the 8P8C (RJ45) and the
6P6C (RJ11/RJ25).

13.6.1 Modular connector pinouts

For modular connectors such as 6P6C (RJ11/RJ25) or 8P8C (RJ45) used by the IOCN card
(and MPC4 card), the pin definitions of the connectors (male) on the cables that will mate with
the connectors (female) on an IOCN card are established as follows:
1- Hold the cable connector (male) in your hand with the tab side down and with the cable
opening facing towards you.
2- Reading from left to right, the pins are numbered 1 to n, that is, 1 to 6 for an 6P6C
(RJ11/RJ25) connector.

13.6.2 Ethernet connectors

These 8-pin 8P8C (RJ45) connectors support the connection of a standard Ethernet
10BASE-TX or 100BASEX-T link.
The pin connections (pinouts) for the 8-pin 8P8C (RJ45) connectors are shown in
Figure 13-11.

Pin Pin Signal

1 Tx+
2 Tx−
8
8P8C (RJ45) Ethernet 3 Rx+
connector on the IOCN card 4 Not connected
(female) 5 Not connected
1
6 Rx−
7 Not connected
8 Not connected

Figure 13-11: Pin definitions for the Ethernet connectors on the IOCN card
(1 and 2 connectors)

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 CONFIGURATION OF CPUM / IOCN CARDS
Connectors on the IOCN card

13.6.3 RS, A and B connectors

The 6-pin 6P6C (RJ11/RJ25) RS connector supports RS-232 or RS-485 communication with
the rack.
The 6-pin 6P6C (RJ11/RJ25) group A and group B connectors support RS-485
communication with the rack. (Alternatively, the group A connectors only can be used to
support RS-232 communication with the rack (see 13.5.1 Linking the RS and A serial
communications connectors)).
The pin connections (pinouts) for the 6-pin 6P6C (RJ11/RJ25) connectors are shown in
Figure 13-12.
The pin connections (pinouts) depend on how the serial communications are configured:
RS-232, half-duplex RS-485 or full-duplex RS-485 (see 13.2 Configuring RS serial
communications and 13.3 Configuring A and B serial communications).

Pin
Pin Signal
1 Not connected
6 2 Not connected
6P6C (RJ11/RJ25)
connector on the IOCN card 3 Rx
(female) 4 Tx
1
5 Not connected
6 0VD
(a) RS-232 configured

Pin Signal Pin Signal

1 A 1 TxA
2 B 2 TxB
3 Not connected 3 RxA
4 Not connected 4 RxB
5 RGND 5 RGND
6 Not connected 6 Not connected
(b) Half-duplex RS-485 configured (c) Full-duplex RS-485 configured

Figure 13-12: Pin definitions for the serial communications connectors on the IOCN card
(RS, A and B connectors)

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CONFIGURATION OF CPUM / IOCN CARDS
Location of components on the CPUM card (later PFM-541I version)

13.7Location of components on the CPUM card (later PFM-541I version)

Figure 13-13 shows the position of jumpers and large components on later versions of the
CPUM card (PNR 200-595-076-HHh or later) designed to be fitted with the PFM-541I or
equivalent CPU module (see 6.1 Different versions of the CPUM card).

PC /104 slot 1
(J11 and J13)

J13

J11

J21
(COM2)

J1
(P1)

J16
(COM1)

J4 and J5
(To display and PC /104 slot 2
buttons on panel) (J10 and J12)
J10

J28 J29
J12
J34 J43
J33 J45
J48 J32 J41
RS-232 and J31
(ETH1)
RS-485
jumpers J44
J38 J46
J37 J39
J36
J35
J47
(ETH0/rear)

Ethernet
J53
J52
J40
J42

J2
front/rear
jumpers (P2)

J15 (ETH0/front) – NET

J20
RS-232
NET

J14 (COM0) – RS232 (RS-485)

J3 J8
(ISA address (ISA interrupt
jumpers) jumpers – not used)
CPUM
panel

Figure 13-13: Location of jumpers on the CPUM card (later PFM-541I version)

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 CONFIGURATION OF CPUM / IOCN CARDS
Location of components on the CPUM card (earlier MSM586EN version)

13.8Location of components on the CPUM card (earlier MSM586EN version)

Figure 13-14 shows the position of jumpers and large components on earlier versions of the
CPUM card (PNR 200-595-075-HHh or earlier) designed to be fitted with the MSM586EN or
equivalent CPU module (see 6.1 Different versions of the CPUM card).

J13

J11

J17 J21

J19 J1
(P1)

J16
J18
J4 J5

J12
Q3
J30 J28 J29
J10

J34 J43
J33 J45
J32 J41
J31
J44
J38 J46
J37 J39
J48 J36
J35

J47
J53
J52
J40
J42

J2
(P2)

J15 J14
J20
RS-232
NET

J3

CPUM
panel

Figure 13-14: Location of jumpers on the CPUM card (earlier MSM586EN version)

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CONFIGURATION OF CPUM / IOCN CARDS
Location of components on the IOCN card

13.9Location of components on the IOCN card

Figure 13-15 shows the position of jumpers and large components on the IOCN card.

RS

J24
J23
J22
J21
J20
J6

J7

A
J8

J9

B
J10

J1 1

J11 J2 2
(P4)

IOCN
panel

Figure 13-15: Location of jumpers on the IOCN card

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 CONFIGURATION OF CPUM / IOCN CARDS
Upgrading the version of firmware running on a CPUM card

13.10Upgrading the version of firmware running on a CPUM card

Earlier versions of the CPUM card use a DiskOnChip DIP memory module for the storage of
the firmware (FW) and user-editable configuration files used by the CPUM. As DiskOnChip
memory modules are no longer produced (end-of-life), these CPUM cards need to be
upgraded to use a CompactFlash memory card instead of the DiskOnChip memory in order
to allow the CPUM to run more up-to-date versions of firmware.
Refer to the CPUM upgrade kit instruction sheet (Meggitt Sensing Systems document
reference 268-037) for further information on replacing a CPUM card’s existing memory with
a newer CompactFlash memory in order to upgrade the CPUM card to run a different version
of firmware.

NOTE: The CPUM upgrade kit instructions are equally applicable to versions of the CPUM
card already using a CompactFlash memory card, except that the new
CompactFlash included in the upgrade kit replaces the existing CompactFlash on
the CPUM (rather than replaces the DiskOnChip).

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Upgrading the version of firmware running on a CPUM card

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 MAINTENANCE AND TROUBLESHOOTING
Long-term storage of racks

14 MAINTENANCE AND TROUBLESHOOTING

Before maintaining or otherwise working with a VM600 rack, it is important to refer to the
information given in the Safety section of the manual, including:
• Electrical safety and installation on page xiv
• Hazardous voltages and the risk of electric shock on page xv
• Hot surfaces and the risk of burning on page xv
• Heavy objects and the risk of injury on page xv
• Replacement parts and accessories on page xvi.

14.1Long-term storage of racks

The specifications given below cover the preparation and storage of VM600 racks in defined
areas for a maximum of 3 years without intermediate checks.

14.1.1 Preparation
• Store the racks fully wired.
• Remove any batteries used in the rack and store them separately.

NOTE: The CPUM is the only card in a VM600 rack that uses a battery.

• Allow time for the racks to acclimatise to the storage conditions before covering them.
• Cover the racks with polyethylene sheeting having very good resistance to tearing or
perforating.
• Provide suitable ventilation to avoid condensation.

14.1.2 Storage

Temperature : See Appendix A - Environmental specifications

Humidity : Between 50 and 70%

NOTE: Maintain a certain distance from pipes carrying water or other liquids that could
cause condensation.

Dust : Dust-free environment

No smoke particles,
no salt or oil mists,
Air quality : no halogens or solvents,
ambient pressure equal to atmospheric pressure,
no permanent draughts
Sunlight : Direct sunlight to be avoided
Protect the racks in an appropriate manner if there is a
Mechanical protection :
risk of mechanical damage occurring
Shock : To be avoided
Vibrations : Not exceeding levels found in inhabited buildings

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Electromagnetic Avoid storage near high-voltage lines or strong magnetic

:
interference fields
Radiation : Not exceeding levels found in inhabited buildings

14.2Modifications and repairs

No adjustments or calibration are required for the individual cards or system components in
a VM600 rack. In addition, there is no maintenance that the customer can perform on this
equipment.
Only Meggitt Sensing Systems personnel, or persons authorised by Meggitt Sensing
Systems, should attempt to modify or repair MPS hardware.

NOTE: Any attempt by unauthorised personnel to modify or repair equipment still under
guarantee will invalidate the warranty.

See 16 Service and support for contact details for repairing defective hardware.

14.3Cleaning
It is not required to clean a VM600 rack.
However, if cleaning does become necessary:
• Clean with a damp cloth, then wipe with a dry cloth if required.
• Keep away from live electrical parts.
• Do not use any solvents or cleaning agents. Never pour or spray any cleaner or liquid on
the rack. Keep all liquids away from the rack.
Liquids entering the housing of the rack can cause short-circuits and damage electronic
components.

HAZARDOUS VOLTAGES EXIST WITHIN VM600 RACKS.

IF CLEANING BECOMES NECESSARY, USE A DAMP CLOTH ONLY AND KEEP AWAY FROM
LIVE ELECTRICAL PARTS.

SEE ALSO HAZARDOUS VOLTAGES AND THE RISK OF ELECTRIC SHOCK ON PAGE XV.

14.4General remarks on fault-finding

The following sections contain information needed to localise a failure, whether this is due to
an internal MPS problem (that is, within the rack) or to an external problem.
The complete measurement system is composed of the following elements (arranged in the
order of the signal processing):
• The transducers and signal conditioners
Front-end
• The cabling between the transducers and components
signal conditioners, and the IOC4T / IOC8T cards
• The MPS rack, including the IOC, MPC4, AMC8 and/or CPUM cards.
The diagnostics of a system failure can be separated into these parts.

NOTE: Before troubleshooting the MPS, it is worthwhile checking that the overall
measuring system (transducer, signal conditioner, and cabling) is correctly
installed.

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14.5Detecting problems due to front-end components and cabling

A front-end problem may be due to:
1- A defective transducer and signal conditioner.
2- Incorrect cabling of the transducer.
3- Cabling between the transducer and the signal conditioner and the MPS becoming
damaged (for example, open-circuit or short-circuit).
4- Incorrect configuration of the input transducer using the VM600 MPS software.
5- A problem with an external power supply (if used), leading to incorrect powering of the
transducer, signal conditioner and/or galvanic separation unit.
Any of the above faults will be signalled on the panel of the MPC4 or AMC8 card by one of
the following:
• The card’s DIAG/STATUS indicator (a multi-function, multi-colour LED).
• The status indicator(s) for the individual channel(s) in question (also multi-function,
multi-colour LEDs).
See Figure 2-7 and 4.9 Operation of LEDs on MPC4 panel for further information.
See Figure 2-9 and 5.10 Operation of LEDs on AMC8 panel for further information.

Cabling problems
Two categories can be observed:
1- The corresponding status indicator on the panel of the MPC4 or AMC8 card blinks green
continuously.
This indicates a continuous problem, for example, incorrect cabling.
2- The corresponding status indicator on the panel of the MPC4 or AMC8 card blinks green
intermittently.
This indicates an intermittent problem, for example, poor electrical contact.
Spikes may be observed on the signal output (for example, by studying the signal on the
corresponding BNC connector on the panel of MPC4 card).

NOTE: The risk of having cabling problems will be reduced if good wiring practice is
observed when installing the hardware.

External power supply failures

Replace the suspect external power supply by one from your spare parts stock. If this solves
the problem, the original power supply can be considered defective.

14.5.1 Replacing a suspect front-end component or cable

If a front-end problem has been traced to a particular measurement channel, then the channel
inhibit function can be used to temporarily bypass the sensor (that is, temporarily inhibit the
protection offered by any associated relays) while the other machinery monitoring channels
and functions continue to operate as normal.
This allows components in a particular measurement channel front-end (such as a
sensor/transducer, signal conditioner and/or cable) to be replaced while the machinery being
monitored continues to operate (if the protection offered by the other machinery monitoring
channels and functions is adequate). It also allows any control system using the relays to
avoid false trips during such maintenance activity.

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To use channel inhibit on an MPC4 card, see 4.6.6 Channel inhibit function and 9.8 Channel
inhibit function.
To use channel inhibit on an AMC8 card, see 5.7.4 Channel inhibit function and 10.6 Channel
inhibit function.

14.6Detecting problems in the VM600 MPS rack

14.6.1 General checks for racks

The following basic checks should be carried out if a problem is suspected at rack level:
• Check that the four LEDs on a RPS6U rack power supply are on (see Figure 2-15). An
LED that remains off indicates a power supply problem.
• Check the MPS rack’s mains fuses are intact and change them if necessary.
• Racks running on an AC supply are fitted with two fuses having the following
specifications:
Rated voltage = 250 VAC
Rated current = 8 A
Type = 5 x 20 mm cartridge fuse with time-lag / delay (T).
For example, Schurter FST 5x20 8A 250VAC (order number 0034.3126).
• Racks running on a DC supply do not have any fuses.
• If a CPUM card is installed, check that the green DIAG LED on its panel is on (see
Figure 2-11). An LED that remains off indicates a problem with this card.
• If a CPUM card is installed, use the SLOT+, SLOT−, OUT+ and OUT− keys on its panel
to check that the built-in display shows the values processed by the various cards in the
rack (MPC4 and AMC8, as applicable).
• If installed, check the state of the DIAG/STATUS indicator on each MPC4 card (see
Figure 2-7). It should normally be green, although it can also be yellow or red, depending
on the activation of the Trip Multiply and Danger Bypass functions. A problem is indicated
by the LED blinking yellow or blinking red.
• If installed, check the state of the DIAG/STATUS indicator on each AMC8 card (see
Figure 2-9). It should normally be green, although it can also be red, depending on the
activation of the Danger Bypass function. A problem is indicated by the LED blinking
yellow or blinking red.
• Check that the SLOT ERROR indicator on each IOC4T or IOC8T card is green (see
Figure 2-8 and Figure 2-10). These LEDs are visible from the rear of the rack. A red LED
indicates that the IOC card is installed in the wrong slot of a VM600 rack.
• Visually check that the connectors at the rear of the rack are correctly installed.
If one of the checks described above reveals that a card may have a problem, you should try
replacing the card in question as described below. If the replacement card functions correctly,
the original card can be considered defective.

NOTE: In all cases, defective cards should be returned to Meggitt Sensing Systems for
repair. See 16 Service and support for further information.

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14.6.2 Replacing a suspect card

Certain precautions must be observed when replacing suspect cards.

These are described below.

HAZARDOUS VOLTAGES EXIST WITHIN VM600 SYSTEM RACKS (ABE04X).

WHEN AN RPS6U RACK POWER SUPPLY, ASSOCIATED REAR PANEL OR CARD IS
REMOVED FROM A VM600 SYSTEM RACK (ABE04X), THE RACK BACKPLANE –
CONTAINING HAZARDOUS VOLTAGES – IS EXPOSED AND THERE IS THE RISK OF
ELECTRIC SHOCK, AS INDICATED BY THE USE OF THE FOLLOWING WARNING LABEL ON
THE EQUIPMENT:

SEE ALSO HAZARDOUS VOLTAGES AND THE RISK OF ELECTRIC SHOCK ON PAGE XV.

HAZARDOUS TEMPERATURES CAN EXIST WITHIN AND ON VM600 SYSTEM

RACKS (ABE04X).

DEPENDING ON THE AMBIENT OPERATING TEMPERATURE, NUMBER OF CARDS AND

POWER SUPPLIES INSTALLED (AND THEIR CONFIGURATION AND OPERATION), THE
INSTALLATION AND COOLING (FORCED OR NATURAL VENTILATION), THE TOP OF A
VM600 RACK CAN BECOME HOT AND THERE IS THE RISK OF BURNING HANDLING THE
RACK, AS INDICATED BY THE USE OF THE FOLLOWING WARNING LABEL ON THE
EQUIPMENT:

SEE ALSO HOT SURFACES AND THE RISK OF BURNING ON PAGE XV.

When handling cards, the necessary precautions should be taken to

prevent damage due to electrostatic discharges.
See Handling precautions for electrostatic sensitive devices on page xvi for
further information.

Before “hot swapping” any card in the rear of a VM600 rack, any associated
processing card in the corresponding slots in the front of the rack must be
disconnected from the rack’s backplane.
See 8.4.2 Subsequent installation of cards ("hot-swapping” capability).

14.6.2.1 General precautions for removing cards

The AMC8, MPC4, IOC4T, IOC8T, RLC16 and IRC4 cards all feature a lever mechanism to
help the user to easily remove the card. Follow the procedure below and see Figure 14-1:
1- Disconnect all external cables connected to the card, for example, the communication
cable (RS-232) for an MPC4 card or front-end cables (J1, J2 and J3) for an IOC4T card.
2- Unfasten the two captive fixing screws. These are found at the top and at the bottom of
the card’s panel.

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3- With your thumbs, simultaneously push the upper handle upwards and the lower
handle downwards. These combined actions will cause the card to move forwards by
1 to 2 mm.
4- Pull on both handles together (with equal force) to extract the card from the rack.

NOTE: Remember to reconnect all of the cables after the card is replaced in the rack.

Fixing screw

Push upper
handle upwards

Push lower
handle downwards

Fixing screw

Figure 14-1: Removing a card from the rack

14.6.2.2 CPUM card

The CPUM cannot be hot swapped, that is, it is necessary to switch off (or disconnect) the
rack power before replacing this type of card.

NOTE: The removal of a CPUM card requires both strength and care!
Note that this card does not employ the lever mechanism described in
14.6.2.1 General precautions for removing cards.

The replacement CPUM card must have exactly the same hardware configuration (jumper
settings) as the original (suspect) CPUM card.
The replacement CPUM card must also have the same sub-modules installed as the original
card. This will allow the same communications possibilities.
Once the replacement CPUM card has been installed, the entire MPS rack configuration must
be downloaded using the VM600 MPSx software.

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14.6.2.3 IOCN card

The IOCN can be hot swapped, therefore it is not necessary to switch off (or disconnect) the
rack power before replacing this type of card.
The replacement IOCN card must have exactly the same hardware configuration (jumper
settings) as the original (suspect) IOCN card.

14.6.2.4 RPS6U rack power supply

In a VM600 rack containing only one RPS6U rack power supply (that is, a configuration
without rack power supply redundancy), it is obviously necessary to interrupt the rack power
while the rack power supply is being replaced. The power should be switched off (or
disconnected) before the suspect rack power supply is removed and only switched on (or
reconnected) once the new rack power supply is installed.
In a VM600 rack employing two RPS6U rack power supplies to support rack power supply
redundancy, the rack and cards can continue to be powered while one of the rack power
supplies is being replaced (see 2.10.5 Racks with two RPS6U rack power supplies in order
to support rack power supply redundancy).

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14.6.2.5 MPC4 card

(1) Before replacing a card
Where possible, various MPS system parameters and other information should be read
before replacing the MPC4 card. We recommend sending the following information to your
Meggitt Sensing Systems representative in order to help the diagnosis of any problems:
• Output states
• The system status
• The system identification
• Status of latched data.
This should be done using the VM600 MPSx software (MPS1 is shown in Figure 14-2). Select
the card in question (for example, slot 3) and use the following menu bar commands to
capture the information:
Communications > From MPC > Read Outputs
Communications > From MPC > Read System Status
Communications > From MPC > Read System Identification
Communications > From MPC > Read Status Latch Data.

Figure 14-2: VM600 MPS software menu bar commands used to obtain
MPC4 card information

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It is important to capture all of this information, because some of it can disappear once the
MPC4 card has been removed from the rack. Note that some information found in
Read System Status is coded in hexadecimal and should be recorded as such.
If an intermittent problem is seen, it is recommended to:
1- Read the registers using the Communications > From MPC > Read Status Latch
Data command and record the values
2- Clear the registers using the Communications > To MPC > Clear Status Latch Data
command
3- Leave the system running for some time.
4- Read the registers using the Communications > From MPC > Read Status Latch
Data command and compare the values obtained with the values recorded in step 1.
The same values and errors should be found if the problem is reproducible.

(2) Replacing the card

The MPC4 can be hot swapped, therefore it is not necessary to switch off (or disconnect) the
rack power before replacing this type of card.
If the MPS rack contains a CPUM card, the configuration for slot nn will be downloaded from
the CPUM to the new MPC4 card once it has been installed in slot nn.
While the configuration is being downloaded into the new MPC4, the card’s DIAG/STATUS
indicator will blink green. It will become green (continuous) once the configuration process
has been completed.

(3) Checking the card after replacement

Once the new card has been configured, it is advisable to check its status using the VM600
MPSx software. Follow the same steps as described above in “Before replacing a Card”.

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14.6.2.6 AMC8 card

(1) Before replacing a card
Where possible, various MPS system parameters and other information should be read
before replacing the AMC8 card. We recommend sending the following information to your
Meggitt Sensing Systems representative in order to help the diagnosis of any problems:
• Output states
• The system status
• The system identification
• Status of latched data.
This should be done using the VM600 MPSx software (MPS1 is shown in Figure 14-3). Select
the card in question (for example, slot 12) and use the following menu bar commands to
capture the information:
Communications > From AMC > Read Outputs
Communications > From AMC > Read System Status
Communications > From AMC > Read System Identification
Communications > From AMC > Read Status Latch Data.

Figure 14-3: VM600 MPS software menu bar commands used to obtain
AMC8 card information

It is important to capture all of this information, because some of it can disappear once the
AMC8 card has been removed from the rack. Note that some information found in
Read System Status is coded in hexadecimal and should be recorded as such.
If an intermittent problem is seen, it is recommended to:
1- Read the registers using the Communications > From AMC > Read Status Latch
Data command and record the values
2- Clear the registers using the Communications > To AMC > Clear Status Latch Data
command
3- Leave the system running for some time.
4- Read the registers using the Communications > From AMC > Read Status Latch
Data command and compare the values obtained with the values recorded in step 1.
The same values and errors should be found if the problem is reproducible.

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(2) Replacing the card

The AMC8 can be hot swapped, therefore it is not necessary to switch off (or disconnect) the
rack power before replacing this type of card.
If the MPS rack contains a CPUM card, the configuration for slot nn will be downloaded from
the CPUM to the new AMC8 card once it has been installed in slot nn.
While the configuration is being downloaded into the new AMC8, the card’s DIAG/STATUS
indicator will blink green. It will become green (continuous) once the configuration process
has been completed.

(3) Checking the card after replacement

Once the new card has been configured, it is advisable to check its status using the VM600
MPSx software. Follow the same steps as described above in “Before Replacing a Card”.

14.6.2.7 IOC4T card

The IOC4T card can be hot swapped, therefore it is not necessary to switch off (or
disconnect) the rack power before replacing this type of card.
Before “hot swapping” an IOC4T card, the associated MPC4 card in the
corresponding slots in the front of the rack must be disconnected from the
rack’s backplane.

The replacement IOC4T card must have exactly the same hardware configuration (jumper
settings) as the original (suspect) IOC4T card.

14.6.2.8 IOC8T card

The IOC8T card can be hot swapped, therefore it is not necessary to switch off (or
disconnect) the rack power before replacing this type of card.
Before “hot swapping” an IOC8T card, the associated AMC8 card in the
corresponding slots in the front of the rack must be disconnected from the
rack’s backplane.

The replacement IOC8T card must have exactly the same hardware configuration (jumper
settings) as the original (suspect) IOC8T card.

14.6.2.9 RLC16 card

The RLC16 card can be hot swapped, therefore it is not necessary to switch off (or
disconnect) the rack power before replacing this type of card.
The replacement RLC16 card must have exactly the same hardware configuration (jumper
settings) as the original (suspect) RLC16 card.

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Checking the MPC4 for processing overload

14.7Checking the MPC4 for processing overload

In certain circumstances, the MPC4 card’s digital signal processor (DSP) will overload if the
processing requirements are too demanding on all four measurement channels at once. This
will be indicated by the DIAG/STATUS LED on the MPC4 blinking yellow (see Table 4-1).
This situation can occur when broad-band processing is being performed on all four
channels. Possible solutions are to:
• Reduce the LP/HP filter frequency ratio
• Reduce the cut-off slope of the filters (for example, from 60 to 48 dB/octave).
The DSP loading can be examined by reading the MPC4 card’s system status as described
in 14.6.2.5 MPC4 card. Click the following menu bar command:
Communications > From MPC > Read System Status.
The DSP loading (DSP Load) is displayed as a percentage of full load in the VM600 MPS
software listing (see Figure 14-4). The value is expressed in hexadecimal, so that:
• Full loading (100%) is shown as 0x0064
• 99% loading is shown as 0x0063
• 96% loading is shown as 0x0060 and so on.

Figure 14-4: Examining the DSP for processing overload

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15 END-OF-LIFE PRODUCT DISPOSAL

A VM600-rack based monitoring system is an electrical/electronic product, therefore, it must
be disposed of in a acceptable manner at the end of its useful life. This is important in order
to reduce pollution and improve resource efficiency.

NOTE: For environmental and economic reasons, end-of-life electrical and electronic
equipment must be collected and treated separately from other waste: it must not
go into landfill (or tip, dump, rubbish dump, garbage dump or dumping ground).

In Europe (the European Union), end-of-life electrical/electronic products are classed as

waste electrical and electronic equipment (WEEE), and are subject to the requirements of the
European Union (EU) directive 2012/19/EU on waste electrical and electronic equipment
(commonly referred to as the WEEE directive).
According to the WEEE regulations, all waste electrical and electronic equipment should be
collected separately and then treated and disposed of in accordance with the best available
and environmentally friendly techniques. This is because electronic waste (or e-waste) may
contain substances harmful to the environment and/or to human health. In addition, electronic
waste is also a valuable source of raw materials that can contribute to a circular economy.
The WEEE symbol (a “crossed-out wheeled bin”) is used on product labelling to indicate
equipment that must be properly treated and disposed of at the end of its life
(see Figure 15-1).

Figure 15-1: WEEE symbol

Although a number of non-EU countries have enacted WEEE regulations, different end-of-life
product disposal laws and regulations apply in other countries and regions of the world.
Accordingly, please consult your local authorities to obtain the information and guidance
relevant to your country and region.

NOTE: At the end of its useful life, a VM600-rack based monitoring system must be
disposed of in an environmentally friendly manner.
In European Union Member States, the WEEE directive is applicable.
In other countries and regions of the world, different laws and regulations may be
applicable, so please consult your local authorities.

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For additional end-of-life product disposal information and guidance, contact your local
Meggitt Sensing Systems representative. Alternatively, contact our main office:

Meggitt SA
Environment, health and safety department
Route de Moncor 4
PO Box 1616
1701 Fribourg
Switzerland

Telephone: +41 26 407 11 11

Email: ehs@ch.meggitt.com
Website: www.meggittsensing.com/energy

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Contacting us

16 SERVICE AND SUPPORT

16.1Contacting us
Meggitt Sensing Systems’ worldwide customer support network offers a range of support,
including 16.2 Technical support and 16.3 Sales and repairs support. For customer support,
contact your local Meggitt Sensing Systems representative. Alternatively, contact our main
office:

Meggitt SA
Customer support department
Route de Moncor 4
PO Box 1616
1701 Fribourg
Switzerland

Telephone: +41 26 407 11 11

Email: energysupport@ch.meggitt.com
Website: www.meggittsensing.com/energy

16.2Technical support
Meggitt Sensing Systems’ technical support team provide both pre-sales and post-sales
technical support, including:
1- General advice
2- Technical advice
3- Troubleshooting
4- Site visits.

NOTE: For further information, contact Meggitt Sensing Systems (see 16.1 Contacting
us).

16.3Sales and repairs support

Meggitt Sensing Systems’ sales team provide both pre-sales and post-sales support,
including advice on:
1- New products
2- Spare parts
3- Repairs.

NOTE: If a product has to be returned for repairs, then it should be accompanied by a

completed Energy product return form, included on page 16-4.

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16.4Customer feedback
As part of our continuing commitment to improving customer service, we warmly welcome
your opinions. To provide feedback, complete the Energy customer feedback form on page
16-7 and return it Meggitt Sensing Systems’ main office (see 16.1 Contacting us).

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REPAIRS AND RETURNS

Energy product return procedure

If a Meggitt Vibro-Meter ® Energy product needs to be returned to Meggitt Switzerland, please
use the online product return procedure on the Meggitt Vibro-Meter ® website at
www.meggittsensing.com/energy/service-and-support/repair

As described on the website, the product return procedure is as follows:

1- Complete and submit online the Energy product return form that is available on the
website (note: * indicates a required field).
For each Energy product to be returned, a separate Energy product return form must be
completed and submitted online.
When an Energy product return form is submitted online, an acknowledgement email
including an Energy product return reference number, will be sent by return to confirm
that the product return form was received by Meggitt Switzerland.
Please use the Energy product return reference number in all future communications
regarding your product return.
2- Complete and include an end-user certificate.
For each Energy product to be returned, an associated end-user certificate is also
required.
The single-use end-user certificate is recommended for smaller organisations that
handle few products and the annual end-user certificate is recommended for larger
organisations that handle many products.
Either end-user certificate can be used to cover multiple products.

NOTE: Visit the website or contact our Customer support department

(see 16.1 Contacting us) to obtain the appropriate end-user certificate form.

3- Send the Energy product together with printed copies of the acknowledgement email (or
emails) and the end-user certificate (or certificates) to Meggitt Switzerland at
Meggitt SA, Repairs department, Route de Moncor 4, PO Box 1616, 1701 Fribourg,
Switzerland.
A separate acknowledgement email (printed copy) is required for each product to be
returned, although a single end-user certificate (printed copy) can be used for multiple
products.
4- In addition, a purchase order (PO) with a value of CHF 0.00 must also be sent to Meggitt
Switzerland, in order to support the initial problem diagnosis.

NOTE: The Energy product return form reproduced below is included to support the
gathering of information required for completion and submission online.

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Energy product return form

Contact information

First name:* Last name:*

Job title: Company:*

Address:*

Country:* Email:*

Telephone:* Fax:

Product information

Product type:* Part number (PNR):*

Serial number (SER):

Note: Enter “Unknown” if the serial number (SER) is not known.

Ex product: SIL product:*

 Yes  Yes

 No  No

Meggitt SA purchase order number: Date of purchase (dd.mm.yyyy):

Product under warranty: Site where installed:

 Yes

 No

 Don’t know

End user:

16 - 4 VM600 MPS hardware manual (standard version) MAMPS-HW/E

Edition 17 - February 2018
 SERVICE AND SUPPORT
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Return information

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If the reason for return is “Repair”, please answer the following questions:*

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SERVICE AND SUPPORT
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Ex product information – additional information required for Ex products only

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If the product is installed in a safety-related system, please answer the following questions:*

Did the system fail** in a safe mode?:* (That is, the safety relay operated but the trip was spurious.)

 Yes

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 Yes

 No

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How long was the operating time before failure (in hours)?:*

Additional information:

** A faulty indicator LED is considered as a cosmetic failure.

16 - 6 VM600 MPS hardware manual (standard version) MAMPS-HW/E

Edition 17 - February 2018
 SERVICE AND SUPPORT
Customer feedback

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Energy customer feedback form

Manual information

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VM600 machinery protection system (MPS) hardware manual (standard version)

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Date of issue: February 2018

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SERVICE AND SUPPORT
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16 - 8 VM600 MPS hardware manual (standard version) MAMPS-HW/E

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 Part IV: Appendices

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 ENVIRONMENTAL SPECIFICATIONS
Overall

A ENVIRONMENTAL SPECIFICATIONS

A.1 Overall
The following specifications apply to the entire VM600 machinery protection system (MPS).

NOTE: Operating and storage temperatures for individual components are included at the
end of this appendix. For further information on individual components, please
refer to the specific data sheets listed in Appendix B.

Operating temperature:
• Minimum −25, −20 or 0°C, depending on the VM600 system
components used (see A.2 Operating temperatures
for individual VM600 system components and
A.4 Temperature derating for the power entry
module of a VM600 rack)
• Maximum 65°C

Storage temperature: According to IEC 60068-1

• Short-term (<3 years) −40 or −25 to 80 or 85°C for an unpowered system,
depending on the VM600 system components used
(see A.3 Storage temperatures for individual VM600
system components)
• Long-term (≥3 years) 10 to 30°C for long-term storage rehabilitated
(installed) without requiring any condition
assessment

Humidity: According to IEC 60068-2-30

• Operating 0 to 90%, non-condensing
• Storage 0 to 95%, non-condensing
Vibration 5 to 35 Hz, 90 minutes/axis,
0.15 mm pk below resonance, 1 g pk above,
according to IEC 60068-2-6
Shock Half-sine, 6 g pk, 11 ms, 3 shocks/axis,
according to IEC 60068-2-27
Drop test 30° drop angle,
according to IEC 60068-2-31

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ENVIRONMENTAL SPECIFICATIONS
Overall

Power supply perturbations:

• AC line voltages 115 VAC ±20%.
(AC-input version
230 VAC +15%, −20%.
of the RPS6U)
• AC line frequencies 50/60 Hz
• AC line harmonics 2nd = 4.5%, 3rd = 4.5%, 4th = 3.0%,
5th = 1.5%, 6th = 1.5%, 7th = 3.0%
• DC line voltage variations
(DC-input versions +30%, −25%
of the RPS6U)
Electromagnetic compatibility (EMC):
• Emission According to IEC/EN 61000-6-4
• Immunity According to IEC/EN 61000-6-2
Electrical safety Conforms to the following electrical safety
standards:
IEC/EN 61010-1: Safety requirements for electrical
equipment for measurement, control and laboratory
use
Altitude Max. 2000 m (6560 ft).
Note: Reduced air density affects cooling ability.

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 ENVIRONMENTAL SPECIFICATIONS
Operating temperatures for individual VM600 system components

A.2 Operating temperatures for individual VM600 system components

The operating temperatures for individual VM600 system components are given in Table A-1.

Table A-1: Operating temperatures for individual VM600 system components

−25 to 65°C −20 to 65°C 0 to 65°C 0 to 70°C

ABE040 and ABE042 √
ABE056 √
AMC8 and IOC8T √
ASPS √
CMC16 √
CPUM and IOCN √ See note 1 √ See note 2
IOC4T √
IOC4T adaptors √
IOC16T √
IRC4 √
MPC1 √
MPC4 √
RLC16 √
RPS6U √ See note 3 √ See note 4
XMx16 and XIO16T √

Notes
In 2015, the CPUM card was updated to use a new CPU module (PC/104) that supports two Ethernet interfaces by default.
However, this change resulted in different temperature specifications for the CPUM/IOCN card pair.
1. Earlier versions of the CPUM card (PNR 200-595-075-HHh or earlier) fitted with the MSM586EN or equivalent
CPU module have an operating temperature range of −25 to 65°C.
2. Later versions of the CPUM card (PNR 200-595-076-HHh or later) fitted with the PFM-541I or equivalent
CPU module have an operating temperature range of −20 to 65°C.
In 2016, the RPS6U rack power supply was updated to provide a higher output power of 330 W. However, this change
resulted in different temperature specifications for the power supply.
3. Earlier versions of the RPS6U rack power supply (PNR 200-582-x00-01h or earlier) that define the power as a
rated power of 300 W have an operating temperature range of −25 to 65°C.
4. Later versions of the RPS6U rack power supply (PNR 200-582-x00-02h or later) that define the power as a
total maximum output power of 330 W have an operating temperature range of 0 to 70°C.

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ENVIRONMENTAL SPECIFICATIONS
Storage temperatures for individual VM600 system components

A.3 Storage temperatures for individual VM600 system components

The storage temperatures for individual VM600 system components are given in Table A-2.

Table A-2: Storage temperatures for individual VM600 system components

−40 to 85°C −25 to 85°C −25 to 80°C

ABE040 and ABE042 √
ABE056 √
AMC8 and IOC8T √
ASPS √
CMC16 √
CPUM and IOCN √ See note 1 √ See note 2
IOC4T √
IOC4T adaptors √
IOC16T √
IRC4 √
MPC1 √
MPC4 √
RLC16 √
RPS6U √
XMx16 and XIO16T √

Notes
In 2015, the CPUM card was updated to use a new CPU module (PC/104) that supports two Ethernet interfaces by default.
However, this change resulted in different temperature specifications for the CPUM/IOCN card pair.
1. Earlier versions of the CPUM card (PNR 200-595-075-HHh or earlier) fitted with the MSM586EN or equivalent
CPU module have a storage temperature range of −25 to 85°C.
2. Later versions of the CPUM card (PNR 200-595-076-HHh or later) fitted with the PFM-541I or equivalent
CPU module have a storage temperature range of −25 to 80°C.

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 ENVIRONMENTAL SPECIFICATIONS
Temperature derating for the power entry module of a VM600 rack

A.4 Temperature derating for the power entry module of a VM600 rack
The AC-input rear panels with mains sockets used by ABE04x racks have a compact filtered
power entry module with an IEC type C14 connector (IEC 60320).
As shown in Figure A-1, this power entry module requires temperature derating when the
VM600 rack operates in environments with temperatures greater than 50°C.
Basically, the power entry module (and VM600 rack) can operate at 100% power for
temperatures up to 50°C, but for temperatures greater than 50°C it must be derated linearly
to 50% power at 70°C.

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 A-6

Temperature derating for the power entry module of a VM600 rack

ENVIRONMENTAL SPECIFICATIONS
1.3

1.2

1.1

1.0
Normalised operating current

0.9

0.8

0.7

0.6

0.5
VM600 MPS hardware manual (standard version) MAMPS-HW/E

0.4

0.3

0.2

0.1

0
0 10 20 30 40 50 60 70 80
Edition 17 - February 2018

Ambient operating temperature (°C)

Figure A-1: Temperature derating for the power entry module (AC input) of a VM600 rack
 DATA SHEETS

B DATA SHEETS
Data sheets exist for the following Meggitt Sensing Systems’ products:

Document
Type Designation
reference
ABE040 and VM600 system rack 268-001
ABE042
ABE056 VM600 slimline rack 268-008
AMC8 and Analog monitoring card and input/output card 268-041
IOC8T
ASPS VM600 Auxiliary sensor power supply 264-236
CPUM and Modular CPU card and input/output card 268-031
IOCN
IOC4T Input/output card for MPC4 268-071
IOC4T adaptors Capacitive-coupling adaptor 268-078
Voltage-drop adaptor 268-077
IRC4 Intelligent relay card 268-085
MPC1 Machinery pulsation card 268-025
MPC4 Machinery protection card 268-021
RLC16 Relay card 268-081
RPS6U VM600 rack power supply 268-011
XMx16 and Extended condition monitoring cards 660-020-010-208A
XIO16T

Visit the Meggitt Vibro-Meter ® website to obtain the latest version of a data sheet and other
product information:
• www.meggittsensing.com/energy

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DATA SHEETS

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 DEFINITION OF BACKPLANE CONNECTOR PINS

C DEFINITION OF BACKPLANE CONNECTOR PINS

This appendix defines the pins on backplane connectors P1, P2, P3 and P4.
The definition of pins on each connector depends on the position of the connector on the rack
backplane (that is, in which slot it is used). The information is presented in tabular form for
the following groups of slots:
• Slot 0 (see Figure C-1)
• Slots 1 and 2 (see Figure C-2)
• Slots 3 to 14 (see Figure C-3)
• Slots 15 and 18 (see Figure C-4).

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DEFINITION OF BACKPLANE CONNECTOR PINS

SLOT 0 SLOT 0
CONNECTOR P1 CONNECTOR P3
PIN No. ROW A ROW B ROW C PIN No. ROW A ROW B ROW C
1 D00 BBSY* D08 1 Conn. P1, Z1 Not connected Conn. P1, D1
2 D01 BCLR* D09 2 Conn. P1, Z2 Not connected Conn. P1, D2
3 D02 ACFAIL* D10 3 Conn. P1, Z3 Not connected Conn. P1, D3
4 D03 BG0IN* D11 4 Conn. P1, Z4 Not connected Conn. P1, D4
5 D04 BG0OUT* D12 5 Conn. P1, Z5 Not connected Conn. P1, D5
6 D05 BG1IN* D13 6 Conn. P1, Z6 Not connected Conn. P1, D6
7 D06 BG1OUT* D14 7 Conn. P1, Z7 Not connected Conn. P1, D7
8 D07 BG2IN* D15 8 Conn. P1, Z8 Not connected Conn. P1, D8
9 GND BG2OUT* GND 9 Conn. P1, Z9 Not connected Conn. P1, D9
10 SYSCLK BG3IN* SYSFAIL* 10 Conn. P1, Z10 Not connected Conn. P1, D10
11 GND BG3OUT* BERR* 11 Conn. P1, Z11 Not connected Conn. P1, D11
12 DS1* BR0* SYSRESET* 12 Conn. P1, Z12 Not connected Conn. P1, D12
13 DS0* BR1* LWORD* 13 Conn. P1, Z13 Not connected Conn. P1, D13
14 WRITE* BR2* AM5 14 Conn. P1, Z14 Not connected Conn. P1, D14
15 GND BR3* A23 15 Conn. P1, Z15 Not connected Conn. P1, D15
16 DTACK* AM0 A22 16 Conn. P1, Z16 Not connected Conn. P1, D16
17 GND AM1 A21 17 Conn. P1, Z17 Not connected Conn. P1, D17
18 AS* AM2 A20 18 Conn. P1, Z18 Not connected Conn. P1, D18
19 GND AM3 A19 19 Conn. P1, Z19 Not connected Conn. P1, D19
20 IACK* GND A18 20 Conn. P1, Z20 Not connected Conn. P1, D20
21 IACKIN* Not connected A17 21 Conn. P1, Z21 Not connected Conn. P1, D21
22 IACKOUT* Not connected A16 22 Conn. P1, Z22 Not connected Conn. P1, D22
23 AM4 GND A15 23 Conn. P1, Z23 Not connected Conn. P1, D23
24 A07 IRQ7* A14 24 Conn. P1, Z24 Not connected Conn. P1, D24
25 A06 IRQ6* A13 25 Conn. P1, Z25 Not connected Conn. P1, D25
26 A05 IRQ5* A12 26 Conn. P1, Z26 Not connected Conn. P1, D26
27 A04 IRQ4* A11 27 Conn. P1, Z27 Not connected Conn. P1, D27
28 A03 IRQ3* A10 28 Conn. P1, Z28 Not connected Conn. P1, D28
29 A02 IRQ2* A9 29 Conn. P1, Z29 Not connected Conn. P1, D29
30 A01 IRQ1* A8 30 Conn. P1, Z30 Not connected Conn. P1, D30
31 -12 V +5 V STDBY +12 V 31 Conn. P1, Z31 Not connected Conn. P1, D31
32 +5 V +5 V +5 V 32 Conn. P1, Z32 Not connected Conn. P1, D32

SLOT 0 SLOT 0
CONNECTOR P2 CONNECTOR P4
PIN No. ROW A ROW B ROW C PIN No. ROW A ROW B ROW C
1 Not connected +5 V Not connected 1 Conn.. P2, Z1 Not connected Conn. P2, D1
2 Not connected GND Not connected 2 Conn. P2, Z2 Not connected Conn. P2, D2
3 Not connected RESERVED Not connected 3 Conn. P2, Z3 Not connected Conn. P2, D3
4 Not connected A24 Not connected 4 Conn. P2, Z4 Not connected Conn. P2, D4
5 Not connected A25 Not connected 5 Conn. P2, Z5 Not connected Conn. P2, D5
6 Not connected A26 Not connected 6 Conn. P2, Z6 Not connected Conn. P2, D6
7 Not connected A27 Not connected 7 Conn. P2, Z7 Not connected Conn. P2, D7
8 Not connected A28 Not connected 8 Conn. P2, Z8 Not connected Conn. P2, D8
9 Not connected A29 Not connected 9 Conn. P2, Z9 Not connected Conn. P2, D9
10 Not connected A30 Not connected 10 Conn. P2, Z10 Not connected Conn. P2, D10
11 Not connected A31 Not connected 11 Conn. P2, Z11 Not connected Conn. P2, D11
12 Not connected GND Not connected 12 Conn. P2, Z12 Not connected Conn. P2, D12
13 Not connected +5 V Not connected 13 Conn. P2, Z13 Not connected Conn. P2, D13
14 Not connected D16 Not connected 14 Conn. P2, Z14 Not connected Conn. P2, D14
15 Not connected D17 Not connected 15 Conn. P2, Z15 Not connected Conn. P2, D15
16 Not connected D18 Not connected 16 Conn. P2, Z16 Not connected Conn. P2, D16
17 Not connected D19 Not connected 17 Conn. P2, Z17 Not connected Conn. P2, D17
18 Not connected D20 Not connected 18 Conn. P2, Z18 Not connected Conn. P2, D18
19 Not connected D21 Not connected 19 Conn. P2, Z19 Not connected Conn. P2, D19
20 Not connected D22 Not connected 20 Conn. P2, Z20 Not connected Conn. P2, D20
21 Not connected D23 Not connected 21 Conn. P2, Z21 Not connected Conn. P2, D21
22 Not connected GND Not connected 22 Conn. P2, Z22 Not connected Conn. P2, D22
23 Not connected D24 Not connected 23 Conn. P2, Z23 Not connected Conn. P2, D23
24 Not connected D25 Not connected 24 Conn. P2, Z24 Not connected Conn. P2, D24
25 Not connected D26 Not connected 25 Conn. P2, Z25 Not connected Conn. P2, D25
26 Not connected D27 Not connected 26 Conn. P2, Z26 Not connected Conn. P2, D26
27 Not connected D28 Not connected 27 Conn. P2, Z27 Not connected Conn. P2, D27
28 Not connected D29 Not connected 28 Conn. P2, Z28 Not connected Conn. P2, D28
29 Not connected D30 Not connected 29 Conn. P2, Z29 Not connected Conn. P2, D29
30 Not connected D31 Not connected 30 Conn. P2, Z30 Not connected Conn. P2, D30
31 Not connected GND Not connected 31 Conn. P2, Z31 Not connected Conn. P2, D31
32 Not connected +5 V Not connected 32 Conn. P2, Z32 Not connected Conn. P2, D32

Figure C-1: Pin definitions for slot 0

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 DEFINITION OF BACKPLANE CONNECTOR PINS

SLOTS 1-2 SLOTS 1-2

CONNECTOR P1 CONNECTOR P3
PIN No. ROW A ROW B ROW C PIN No. ROW A ROW B ROW C
1 D00 BBSY* D08 1 OC 0 TACHO 0 OC 8
2 D01 BCLR* D09 2 OC 1 TACHO 1 OC 9
3 D02 ACFAIL* D10 3 OC 2 TACHO 2 OC 10
4 D03 BG0IN* D11 4 OC 3 TACHO 3 OC 11
5 D04 BG0OUT* D12 5 OC 4 TACHO 4 OC 12
6 D05 BG1IN* D13 6 OC 5 TACHO 5 OC 13
7 D06 BG1OUT* D14 7 OC 6 TACHO 6 OC 14
8 D07 BG2IN* D15 8 OC 7 TACHO 7 OC 15
9 GND BG2OUT* GND 9 GND TACHO GND RAW_H 2
10 SYSCLK BG3IN* SYSFAIL* 10 RAW_H 0 RAW_H 1 RAW_L 2
11 GND BG3OUT* BERR* 11 RAW_L 0 RAW_L 1 RAW_H 5
12 DS1* BR0* SYSRESET* 12 RAW_H 3 RAW_H 4 RAW_L 5
13 DS0* BR1* LWORD* 13 RAW_L 3 RAW_L 4 RAW_H 8
14 WRITE* BR2* AM5 14 RAW_H 6 RAW_H 7 RAW_L 8
15 GND BR3* A23 15 RAW_L 6 RAW_L 7 RAW_H 11
16 DTACK* AM0 A22 16 RAW_H 9 RAW_H 10 RAW_L 11
17 GND AM1 A21 17 RAW_L 9 RAW_L 10 RAW_H 14
18 AS* AM2 A20 18 RAW_H 12 RAW_H 13 RAW_L 14
19 GND AM3 A19 19 RAW_L 12 RAW_L 13 RAW_H 17
20 IACK* GND A18 20 RAW_H 15 RAW_H 16 RAW_L 17
21 IACKIN* Not connected A17 21 RAW_L 15 RAW_L 16 RAW_H 20
22 IACKOUT* Not connected A16 22 RAW_H 18 RAW_H 19 RAW_L 20
23 AM4 GND A15 23 RAW_L 18 RAW_L 19 RAW_H 23
24 A07 IRQ7* A14 24 RAW_H 21 RAW_H 22 RAW_L 23
25 A06 IRQ6* A13 25 RAW_L 21 RAW_L 22 RAW_H 26
26 A05 IRQ5* A12 26 RAW_H 24 RAW_H 25 RAW_L 26
27 A04 IRQ4* A11 27 RAW_L 24 RAW_L 25 RAW_H 29
28 A03 IRQ3* A10 28 RAW_H 27 RAW_H 28 RAW_L 29
29 A02 IRQ2* A9 29 RAW_L 27 RAW_L 28 RAW_H 31
30 A01 IRQ1* A8 30 GND RAW_H 30 RAW_L 31
31 -12 V +5 V STDBY +12 V 31 -12 V RAW_L 30 +12 V
32 +5 V +5 V +5 V 32 +5 V +5 V +5 V

SLOTS 1-2 SLOTS 1-2

CONNECTOR P2 CONNECTOR P4
PIN No. ROW A ROW B ROW C PIN No. ROW A ROW B ROW C
1 Not connected +5 V Not connected 1 Not connected Not connected Not connected
2 Not connected GND Not connected 2 Not connected Not connected Not connected
3 Not connected RESERVED Not connected 3 Not connected Not connected Not connected
4 Not connected A24 Not connected 4 Not connected Not connected Not connected
5 Not connected A25 Not connected 5 Not connected Not connected Not connected
6 Not connected A26 Not connected 6 Not connected Not connected Not connected
7 Not connected A27 Not connected 7 Not connected Not connected Not connected
8 Not connected A28 Not connected 8 Not connected Not connected Not connected
9 Not connected A29 Not connected 9 Not connected Not connected Not connected
10 Not connected A30 Not connected 10 Not connected Not connected Not connected
11 Not connected A31 Not connected 11 Not connected Not connected Not connected
12 Not connected GND Not connected 12 Not connected Not connected Not connected
13 Not connected +5 V Not connected 13 Not connected Not connected Not connected
14 Not connected D16 Not connected 14 Not connected Not connected Not connected
15 Not connected D17 Not connected 15 Not connected Not connected Not connected
16 Not connected D18 Not connected 16 Not connected Not connected Not connected
17 Not connected D19 Not connected 17 Not connected Not connected Not connected
18 Not connected D20 Not connected 18 Not connected Not connected Not connected
19 Not connected D21 Not connected 19 Not connected Not connected Not connected
20 Not connected D22 Not connected 20 Not connected Not connected Not connected
21 Not connected D23 Not connected 21 Not connected Not connected Not connected
22 Not connected GND Not connected 22 Not connected Not connected Not connected
23 Not connected D24 Not connected 23 Not connected Not connected Not connected
24 Not connected D25 Not connected 24 Not connected Not connected Not connected
25 Not connected D26 Not connected 25 Not connected Not connected Not connected
26 Not connected D27 Not connected 26 Not connected Not connected Not connected
27 Not connected D28 Not connected 27 Not connected Not connected Not connected
28 Not connected D29 Not connected 28 Not connected Not connected Not connected
29 Not connected D30 Not connected 29 Not connected Not connected Not connected
30 Not connected D31 Not connected 30 Not connected Not connected Not connected
31 Not connected GND Not connected 31 Not connected Not connected Not connected
32 Not connected +5 V Not connected 32 Not connected Not connected Not connected

Figure C-2: Pin definitions for slots 1 and 2

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DEFINITION OF BACKPLANE CONNECTOR PINS

SLOTS 3-14 SLOTS 3-14

CONNECTOR P1 CONNECTOR P3
PIN No. ROW A ROW B ROW C PIN No. ROW A ROW B ROW C
1 D00 BBSY* D08 1 OCx 0 TACHO 0 OCx 8
2 D01 BCLR* D09 2 OCx 1 TACHO 1 OCx 9
3 D02 ACFAIL* D10 3 OCx 2 TACHO 2 OCx 10
4 D03 BG0IN* D11 4 OCx 3 TACHO 3 OCx 11
5 D04 BG0OUT* D12 5 OCx 4 TACHO 4 OCx 12
6 D05 BG1IN* D13 6 OCx 5 TACHO 5 OCx 13
7 D06 BG1OUT* D14 7 OCx 6 TACHO 6 OCx 14
8 D07 BG2IN* D15 8 OCx 7 TACHO 7 OCx 15
9 GND BG2OUT* GND 9 GND TACHO GND RAW_H 2
10 SYSCLK BG3IN* SYSFAIL* 10 RAW_H 0 RAW_H 1 RAW_L 2
11 GND BG3OUT* BERR* 11 RAW_L 0 RAW_L 1 RAW_H 5
12 DS1* BR0* SYSRESET* 12 RAW_H 3 RAW_H 4 RAW_L 5
13 DS0* BR1* LWORD* 13 RAW_L 3 RAW_L 4 RAW_H 8
14 WRITE* BR2* AM5 14 RAW_H 6 RAW_H 7 RAW_L 8
15 GND BR3* A23 15 RAW_L 6 RAW_L 7 RAW_H 11
16 DTACK* AM0 A22 16 RAW_H 9 RAW_H 10 RAW_L 11
17 GND AM1 A21 17 RAW_L 9 RAW_L 10 RAW_H 14
18 AS* AM2 A20 18 RAW_H 12 RAW_H 13 RAW_L 14
19 GND AM3 A19 19 RAW_L 12 RAW_L 13 RAW_H 17
20 IACK* GND A18 20 RAW_H 15 RAW_H 16 RAW_L 17
21 IACKIN* Not connected A17 21 RAW_L 15 RAW_L 16 RAW_H 20
22 IACKOUT* Not connected A16 22 RAW_H 18 RAW_H 19 RAW_L 20
23 AM4 GND A15 23 RAW_L 18 RAW_L 19 RAW_H 23
24 A07 IRQ7* A14 24 RAW_H 21 RAW_H 22 RAW_L 23
25 A06 IRQ6* A13 25 RAW_L 21 RAW_L 22 RAW_H 26
26 A05 IRQ5* A12 26 RAW_H 24 RAW_H 25 RAW_L 26
27 A04 IRQ4* A11 27 RAW_L 24 RAW_L 25 RAW_H 29
28 A03 IRQ3* A10 28 RAW_H 27 RAW_H 28 RAW_L 29
29 A02 IRQ2* A9 29 RAW_L 27 RAW_L 28 RAW_H 31
30 A01 IRQ1* A8 30 GND RAW_H 30 RAW_L 31
31 -12 V +5 V STDBY +12 V 31 -12 V RAW_L 30 +12 V
32 +5 V +5 V +5 V 32 +5 V +5 V +5 V

SLOTS 3-14 SLOTS 3-14

CONNECTOR P2 CONNECTOR P4
PIN No. ROW A ROW B ROW C PIN No. ROW A ROW B ROW C
1 Conn. P4, A1 Conn. P4, B1 Conn. P4, C1 1 Conn. P2, A1 Conn. P2, B1 Conn. P2, C1
2 Conn. P4, A2 Conn. P4, B2 Conn. P4, C2 2 Conn. P2, A2 Conn. P2, B2 Conn. P2, C2
3 Conn. P4, A3 Conn. P4, B3 Conn. P4, C3 3 Conn. P2, A3 Conn. P2, B3 Conn. P2, C3
4 Conn. P4, A4 Conn. P4, B4 Conn. P4, C4 4 Conn. P2, A4 Conn. P2, B4 Conn. P2, C4
5 Conn. P4, A5 Conn. P4, B5 Conn. P4, C5 5 Conn. P2, A5 Conn. P2, B5 Conn. P2, C5
6 Conn. P4, A6 Conn. P4, B6 Conn. P4, C6 6 Conn. P2, A6 Conn. P2, B6 Conn. P2, C6
7 Conn. P4, A7 Conn. P4, B7 Conn. P4, C7 7 Conn. P2, A7 Conn. P2, B7 Conn. P2, C7
8 Conn. P4, A8 Conn. P4, B8 Conn. P4, C8 8 Conn. P2, A8 Conn. P2, B8 Conn. P2, C8
9 Conn. P4, A9 Conn. P4, B9 Conn. P4, C9 9 Conn. P2, A9 Conn. P2, B9 Conn. P2, C9
10 Conn. P4, A10 Conn. P4, B10 Conn. P4, C10 10 Conn. P2, A10 Conn. P2, B10 Conn. P2, C10
11 Conn. P4, A11 Conn. P4, B11 Conn. P4, C11 11 Conn. P2, A11 Conn. P2, B11 Conn. P2, C11
12 Conn. P4, A12 Conn. P4, B12 Conn. P4, C12 12 Conn. P2, A12 Conn. P2, B12 Conn. P2, C12
13 Conn. P4, A13 Conn. P4, B13 Conn. P4, C13 13 Conn. P2, A13 Conn. P2, B13 Conn. P2, C13
14 Conn. P4, A14 Conn. P4, B14 Conn. P4, C14 14 Conn. P2, A14 Conn. P2, B14 Conn. P2, C14
15 Conn. P4, A15 Conn. P4, B15 Conn. P4, C15 15 Conn. P2, A15 Conn. P2, B15 Conn. P2, C15
16 Conn. P4, A16 Conn. P4, B16 Conn. P4, C16 16 Conn. P2, A16 Conn. P2, B16 Conn. P2, C16
17 Conn. P4, A17 Conn. P4, B17 Conn. P4, C17 17 Conn. P2, A17 Conn. P2, B17 Conn. P2, C17
18 Conn. P4, A18 Conn. P4, B18 Conn. P4, C18 18 Conn. P2, A18 Conn. P2, B18 Conn. P2, C18
19 Conn. P4, A19 Conn. P4, B19 Conn. P4, C19 19 Conn. P2, A19 Conn. P2, B19 Conn. P2, C19
20 Conn. P4, A20 Conn. P4, B20 Conn. P4, C20 20 Conn. P2, A20 Conn. P2, B20 Conn. P2, C20
21 Conn. P4, A21 Conn. P4, B21 Conn. P4, C21 21 Conn. P2, A21 Conn. P2, B21 Conn. P2, C21
22 Conn. P4, A22 Conn. P4, B22 Conn. P4, C22 22 Conn. P2, A22 Conn. P2, B22 Conn. P2, C22
23 Conn. P4, A23 Conn. P4, B23 Conn. P4, C23 23 Conn. P2, A23 Conn. P2, B23 Conn. P2, C23
24 Conn. P4, A24 Conn. P4, B24 Conn. P4, C24 24 Conn. P2, A24 Conn. P2, B24 Conn. P2, C24
25 Conn. P4, A25 Conn. P4, B25 Conn. P4, C25 25 Conn. P2, A25 Conn. P2, B25 Conn. P2, C25
26 Conn. P4, A26 Conn. P4, B26 Conn. P4, C26 26 Conn. P2, A26 Conn. P2, B26 Conn. P2, C26
27 Conn. P4, A27 Conn. P4, B27 Conn. P4, C27 27 Conn. P2, A27 Conn. P2, B27 Conn. P2, C27
28 Conn. P4, A28 Conn. P4, B28 Conn. P4, C28 28 Conn. P2, A28 Conn. P2, B28 Conn. P2, C28
29 Conn. P4, A29 Conn. P4, B29 Conn. P4, C29 29 Conn. P2, A29 Conn. P2, B29 Conn. P2, C29
30 Conn. P4, A30 Conn. P4, B30 Conn. P4, C30 30 Conn. P2, A30 Conn. P2, B30 Conn. P2, C30
31 Conn. P4, A31 Conn. P4, B31 Conn. P4, C31 31 Conn. P2, A31 Conn. P2, B31 Conn. P2, C31
32 Conn. P4, A32 Conn. P4, B32 Conn. P4, C32 32 Conn. P2, A32 Conn. P2, B32 Conn. P2, C32

Figure C-3: Pin definitions for slots 3 to 14

C-4 VM600 MPS hardware manual (standard version) MAMPS-HW/E

Edition 17 - February 2018
 DEFINITION OF BACKPLANE CONNECTOR PINS

SLOTS 15 & 18 SLOTS 15-18

CONNECTOR P1 CONNECTOR P3
PIN NUMBER DESIGNATION PIN No. ROW A ROW B ROW C
D4 +5 V 1 OC 0 TACHO 0 OC 8
Z6 +5 V 2 OC 1 TACHO 1 OC 9
D8 +5 V 3 OC 2 TACHO 2 OC 10
Z10 +5 V 4 OC 3 TACHO 3 OC 11
D12 +5 V 5 OC 4 TACHO 4 OC 12
Z14 +5 V SENSE 6 OC 5 TACHO 5 OC 13
D16 -12 V 7 OC 6 TACHO 6 OC 14
Z18 GND 8 OC 7 TACHO 7 OC 15
D20 GND 9 GND TACHO GND RAW_H 2
Z22 GND 10 RAW_H 0 RAW_H 1 RAW_L 2
D24 GND 11 RAW_L 0 RAW_L 1 RAW_H 5
Z26 GND 12 RAW_H 3 RAW_H 4 RAW_L 5
D28 +12 V 13 RAW_L 3 RAW_L 4 RAW_H 8
Z30 +12 V 14 RAW_H 6 RAW_H 7 RAW_L 8
15 RAW_L 6 RAW_L 7 RAW_H 11
D32 GND SENSE
16 RAW_H 9 RAW_H 10 RAW_L 11
17 RAW_L 9 RAW_L 10 RAW_H 14
18 RAW_H 12 RAW_H 13 RAW_L 14
19 RAW_L 12 RAW_L 13 RAW_H 17
20 RAW_H 15 RAW_H 16 RAW_L 17
21 RAW_L 15 RAW_L 16 RAW_H 20
22 RAW_H 18 RAW_H 19 RAW_L 20
23 RAW_L 18 RAW_L 19 RAW_H 23
24 RAW_H 21 RAW_H 22 RAW_L 23
25 RAW_L 21 RAW_L 22 RAW_H 26
26 RAW_H 24 RAW_H 25 RAW_L 26
27 RAW_L 24 RAW_L 25 RAW_H 29
28 RAW_H 27 RAW_H 28 RAW_L 29
29 RAW_L 27 RAW_L 28 RAW_H 31
30 GND RAW_H 30 RAW_L 31
31 -12 V RAW_L 30 +12 V
32 +5 V +5 V +5 V

SLOTS 15 & 18
SLOTS 15-18
CONNECTOR P2
CONNECTOR P4
PIN NUMBER DESIGNATION
PIN No. ROW A ROW B ROW C
D4 AC_FAIL*
1 Not connected Not connected Not connected
Z6 SYSRESET*
2 Not connected Not connected Not connected
D8 Not used
3 Not connected Not connected Not connected
Z10 Not used
4 Not connected Not connected Not connected
D12 Not used
5 Not connected Not connected Not connected
Z14 Not used
6 Not connected Not connected Not connected
D16 Not used
7 Not connected Not connected Not connected
Z18 Not used 8 Not connected Not connected Not connected
D20 DC_VOLT+ 9 Not connected Not connected Not connected
Z22 DC_VOLT+ 10 Not connected Not connected Not connected
D24 DC_GND 11 Not connected Not connected Not connected
Z26 DC_GND 12 Not connected Not connected Not connected
D28 AC_LINE 13 Not connected Not connected Not connected
Z30 AC_NEUTRAL 14 Not connected Not connected Not connected
D32 AC_PE 15 Not connected Not connected Not connected
16 Not connected Not connected Not connected
17 Not connected Not connected Not connected
18 Not connected Not connected Not connected
19 Not connected Not connected Not connected
20 Not connected Not connected Not connected
21 Not connected Not connected Not connected
22 Not connected Not connected Not connected
23 Not connected Not connected Not connected
24 Not connected Not connected Not connected
25 Not connected Not connected Not connected
26 Not connected Not connected Not connected
27 Not connected Not connected Not connected
28 Not connected Not connected Not connected
29 Not connected Not connected Not connected
30 Not connected Not connected Not connected
31 Not connected Not connected Not connected
32 Not connected Not connected Not connected

Figure C-4: Pin definitions for slots 15 to 18

VM600 MPS hardware manual (standard version) MAMPS-HW/E C-5

Edition 17 - February 2018
DEFINITION OF BACKPLANE CONNECTOR PINS

THIS PAGE INTENTIONALLY LEFT BLANK

C-6 VM600 MPS hardware manual (standard version) MAMPS-HW/E

Edition 17 - February 2018
 ABBREVIATIONS AND SYMBOLS

D ABBREVIATIONS AND SYMBOLS

This appendix defines the abbreviations and symbols used in this manual as well as in
associated Meggitt Sensing Systems documentation.
Only the basic measurement unit symbols are listed here (for example, Hz, V, W). Units
combined with metric prefixes (such as micro-, milli- and kilo-) have not been included.
.
Table D-1: Abbreviations and symbols

Abbreviation Definition

A Ampere (unit of electric current)

AB Absolute bearing vibration (= MPS processing function)
VM600 system rack (19" racks, including the ABE040 and ABE042, from
ABE04x
Meggitt Sensing Systems’ Vibro-Meter ® product line)
VM600 slimline rack (19" rack from Meggitt Sensing Systems’
ABE056
Vibro-Meter ® product line)
AC Alternating current
ADC Analog-to-digital converter
AMC Analog monitoring card (AMC8)
ANSI American national standards institute
API American petroleum institute (standards organisation)
AR Alarm Reset
AS Absolute shaft / shaft absolute vibration (= MPS processing function)
ASPS Auxiliary sensor power supply
ATEX Directive (94/9/EC) concerning the use of equipment in potentially
ATEX
explosive atmospheres (from the French term ATmosphères EXplosibles)
AVG Average

BBAB Broad-band absolute bearing vibration* (= MPS processing function)

BBP Broad-band pressure (= MPS processing function)
BIST Built-in self test
BIT Built-in test
BITE Built-in test equipment
BP Band pass (filter)
BW Bandwidth
C Coulomb (unit of electric charge)
CJ Cold junction
CJC Cold-junction compensation

VM600 MPS hardware manual (standard version) MAMPS-HW/E D-1

Edition 17 - February 2018
ABBREVIATIONS AND SYMBOLS

Table D-1: Abbreviations and symbols (continued)

Abbreviation Definition

CMC Condition monitoring card (CMC16). See also XMC and XMV.
CMRR Common-mode rejection ratio
CMS Condition monitoring system
CMV Common-mode voltage
COM Common
CPU Central processing unit
CSA Canadian standards association
DAC Digital-to-analog converter
dB Decibel
DB Danger Bypass
DC Direct current
DCS Distributed control system
DFT Discrete fourier transform
DHE Differential housing expansion (= MPS processing function)
DMF Dual mathematical function (= MPS processing function)
DPDT Double-pole double-throw (type of relay)
DQSP Delta (or differential) quasi-static pressure (= MPS processing function)
DQST Delta (or differential) quasi-static temperature (= MPS processing function)
DSI Discrete signal interface
DSP Digital signal processor
EC Eccentricity (= MPS processing function)
EEPROM Electrically erasable programmable read-only memory
EMC Electromagnetic compatibility
EMI Electromagnetic interference
EN European standard
EPROM Erasable programmable read-only memory
F Farad (unit of electric capacitance)
FLASH Type of memory (sometimes called flash EEPROM)
FFT Fast fourier transform
FW Firmware (embedded software)
g Gram (unit of mass)

D-2 VM600 MPS hardware manual (standard version) MAMPS-HW/E

Edition 17 - February 2018
 ABBREVIATIONS AND SYMBOLS

Table D-1: Abbreviations and symbols (continued)

Abbreviation Definition

g Grav (unit of acceleration, approximately equal to 9.81 m/s2)

GND Ground
HE (Absolute) housing expansion (= MPS processing function)
(i) High-pass (filter)
HP
(ii) High-pressure (turbine)
HW Hardware
Hz Hertz (unit of frequency)
IEC International electrotechnical commission
IOC Input/output cards (IOC4T, IOC8T, IOC16T and IOCN)
IP Industry pack
I/P Input
IRC Intelligent relay card (IRC4)
ISO International organisation for standardisation
JS Jumper selectable
K Kelvin (unit of temperature)
LCD Liquid crystal display
Laboratoire central des industries électriques (French certifying body used
LCIE
by Meggitt Sensing Systems)
LED Light emitting diode
(i) Low-pass (filter)
LP
(ii) Low-pressure (turbine)
m Meter (unit of length)
max. Maximum
min. Minimum
MPC Machinery protection card (MPC4 and MPC4SIL)
MPS Machinery protection system
MTBF Mean time between failures
MUX Multiplexer
N Newton (unit of force)
N/A Not applicable
NB Narrow band (= MPS processing function, also known as tracking)
NBFS Narrow-band fixed frequency (= MPS processing function)

VM600 MPS hardware manual (standard version) MAMPS-HW/E D-3

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ABBREVIATIONS AND SYMBOLS

Table D-1: Abbreviations and symbols (continued)

Abbreviation Definition

NC Normally closed
NDE Normally de-energised
NE Normally energised
NO Normally open
OC Open collector
O/P Output

Pa Pascal (unit of pressure, equivalent to N/m2)

PCB Printed circuit board
PCS Process control system
PLC Programmable logic controller
pk Peak
P/N Part number
pp Peak-to-peak
PS Power supply

PS Position* (= MPS processing function)

Physikalisch-Technische Bundesanstalt (German certifying body used by
PTB
Meggitt Sensing Systems)
QSP Quasi-static pressure (= MPS processing function)
QST Quasi-static temperature (= MPS processing function)
RAM Random access memory
RFI Radio frequency interference
RLC Relay card (RLC16)
RMS Root mean square
ROM Read only memory
RPM Revolutions per minute
RPS Rack power supply (RPS6U)

Relative shaft / shaft relative (API: radial shaft)*

RS
(= MPS processing function)
Relative shaft / shaft relative expansion using shaft collar
RSC
(= MPS processing function)
Relative shaft / shaft relative expansion using shaft taper
RST
(= MPS processing function)

D-4 VM600 MPS hardware manual (standard version) MAMPS-HW/E

Edition 17 - February 2018
 ABBREVIATIONS AND SYMBOLS

Table D-1: Abbreviations and symbols (continued)

Abbreviation Definition

RTD Resistance temperature detector

s Second (unit of time)
Relative shaft / shaft relative expansion using pendulum
SEP
(= MPS processing function)
S/H Sample and hold

Smax Maximum vibratory displacement in the plane of measurement, as defined

in ISO 7919-1 (= MPS processing function)
SNR Signal-to-noise ratio
SPDT Single-pole double-throw (type of relay)
SW Software
TC Thermocouple
TM Trip Multiply
TTL Transistor-transistor logic
typ. typical, typically
U/I Voltage-to-current (converter)
V Volt (unit of electric potential)
VAC Voltage (alternating current)

VDC Voltage (direct current)

Vpp Voltage (peak-to-peak value)

VRMS Voltage (root-mean-square value)

VDI Verein Deutscher Ingenieure

VM600 series (product range), from Meggitt Sensing Systems’
VM600
Vibro-Meter ® product line
VME VERSAbus module eurocard
W Watt (unit of power)
XIO Extended input/output card (XIO16T) for use with the XMC16 and XMV16
XMC Extended monitoring card for combustion (XMC16)
Extended monitoring card for vibration (XMV16) and extended monitoring
XMV
card for vibration (XMVS16)
−ve Negative
+ve Positive

VM600 MPS hardware manual (standard version) MAMPS-HW/E D-5

Edition 17 - February 2018
ABBREVIATIONS AND SYMBOLS

Table D-1: Abbreviations and symbols (continued)

Abbreviation Definition

°C Degree celsius
°F Degree fahrenheit
Ω Ohm (unit of electric resistance)

*API 670 terminology:

• (BB/NB) AB is close to casing vibration.
• PS corresponds to axial position.
• RS corresponds to radial shaft vibration.

D-6 VM600 MPS hardware manual (standard version) MAMPS-HW/E

Edition 17 - February 2018