HPSM/32/TB-01

Includes:
HPSM/32/TB-01/FUSE
HPSM/32/TB-01/HF-16
HPSM/32/TB-01/HF-16/FUSE
HPSM/32/TB-01/HF-32

Installation Manual

IMSM001A6
(991207A)
Disclaimer
The contents of this publication are presented for informational purposes only, and while every effort has
been made to ensure their accuracy, they are not to be construed as warranties or guarantees, expressed or
implied, regarding the products or services described herein or their use or applicability. We reserve the
right to modify or improve the designs or specifications of such products at any time without notice.

Copyright and Trademark Information

This manual is copyright of Elcon Instruments with all rights reserved. This manual may not be copied, in
whole or in part, without the written consent of Elcon Instruments.
Elcon Instruments reserves the right to make changes to this manual without notice.

Asset Management Solutions (AMS) is a registered trademark of Fisher-Rosemount Systems.

HART is a registered trademark of the HART Communication Foundation.
Windows is a trademark of Microsoft Corporation.
All other marks are property of their respective owners.

2
 Table of Contents
1. General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.1 Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.2 Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1.3 HART Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.4 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.4.1 1700 MUX Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.1.4.2 HPSM Termination Board Specifications. . . . . . . . . . . . . . . . . . . . . . . . .6
1.1.4.3 RS-485 Line Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Asset Management Solutions Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Associated Tools and Test Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4 Quality Assurance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.5 Certifications and Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6 Unpacking and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.7 Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Intrinsic Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.4 Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.1 Universal Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.5 Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.5.1 Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.5.2 RS-485. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.5.3 Field Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.5.4 Control Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.5.5 HART Communicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.5.5.1 1700 HHT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.6 Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3. Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.1 Initial Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.1.1 1700 Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.1.1.1 Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1.1.2 Baud Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1.2 RS-485/RS-232 Converter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.2 Start-up Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3 Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.4 Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.5 Modes of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4. Theory of Operation (Principles of Operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 HART Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.2 Multiple Multiplexers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5. Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 1700 MUX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6. Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
7. Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8. Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
9. Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
10. Contact Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3
 Figures
Figure 1. HPSM/32/TB-01 Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2. RS-485 Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 3. 1700 MUX Labels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 4. 1700 MUX Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Tables
Table 1. P1 & P2 Pinout Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 2. Maximum Wiring Lengths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 3. 1700 MUX LED Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 4. Replaceable Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Appendix A – Wiring Diagrams

Analog Input Series Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Analog Input Parallel Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Analog Output Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4
1. General Description
1.1 Introduction

This manual provides guidance for the installation, operation, and maintenance of your Elcon 1700 Multiplexer, and
termination board model number, HPSM/32/TB-01. This includes model numbers: HPSM/32/TB-01/FUSE,
HPSM/32/TB-01/HF16, HPSM/32/TB-01/HF-16/FUSE, and HPSM/32/TB-01/HF32.

The Elcon 1700 Multiplexer will be referred to in this manual as the 1700 MUX. All further references to the
HPSM/32/TB-01, HPSM/32/TB-01/FUSE, HPSM/32/TB-01/HF16, HPSM/32/TB-01/HF-16/FUSE, and
HPSM/32/TB-01/HF32 will be simply HPSM. Please note that any references to HART filters will only apply to
the HPSM/32/TB-01/HF16, HPSM/32/TB-01/HF-16/FUSE or HPSM/32/TB-01/HF32. When referring to the two
units as a whole, they will be called the HART Interface Solution, or simply HIS.

To avoid damage, failure, or improper operation, read this manual carefully before installing and operating the
equipment.

1.1.1 Purpose

The 1700 MUX is a HART signal multiplexer unit, which allows access to HART communication on existing
4-20mA wiring.

1.1.2 Functions

Your HART Interface Solution interfaces up to 32 field located HART devices. The 1700 MUX is the heart of the
system. It acts as a gateway device, routing communications between the maintenance workstation PC and the
HART devices. The 1700 MUX uses the HART protocol on both the RS-485 link to the maintenance workstation
PC and on the Bell 202 Frequency Shift Keying (FSK) link (base HART protocol) to each of the HART devices. It
interrogates each HART device, retrieves device information, and stores it in an internal database. This information
is available to the maintenance workstation software.

Furthermore, the 1700 MUX acts as a message coordinator for communication between the maintenance
workstation PC and the HART devices. In this way, the 1700 MUX is transparent to the user. In fact, the user has
access to each HART device as if connected directly at the device itself. Additionally, the 1700 MUX may be
connected in a HART RS-485 multidrop network. A maintenance workstation PC can use this multidrop network
for configuration, maintenance, calibration, diagnostics, and data access.

HART Interface Solutions are supplied by ELCON with several models in order to allow simple and reliable
connection with Smart devices.

The HPSM/32/TB-01 is the foundation of this product line. It is simply a passive module that gives the 1700 MUX
access to the HART data. The different variations are functionally similar with the following optional features:

HPSM/32/TB-01/FUSE: Adds 50mA fuse in series with the terminal blocks on all 32 channels
HPSM/32/TB-01/HF16: Adds HART filters in series with channels 1-16
HPSM/32/TB-01/HF-16/FUSE: Adds HART filters in series with channels 1-16 and 50mA fuse in series with
channels 17-32
HPSM/32/TB-01/HF32: Adds HART filters to all 32 channels

5
1.1.3 HART Overview

HART is an acronym for "Highway Addressable Remote Transducer". The HART protocol makes use of the Bell
202 FSK standard to superimpose digital signals at a low level on top of the 4-20mA signal. This enables two-way
communication and makes it possible for additional information beyond just the normal process variable to be
communicated to/from a smart field instrument. The HART protocol communicates without interrupting the 4-
20mA signal and allows a host application (master) to get two or more digital updates per second from a field
device. As the digital FSK signal is phase continuous, there is no interference with the 4-20mA signal.

1.1.4 Specifications

1.1.4.1 1700 MUX Specifications

POWER SUPPLY: 24 VDC nominal (22 V - 28 V) at 100 mA

POWER DISSIPATION: 3 W maximum
FUSE: Wickmann Type TR5/IEC 127-3, 250 V Time Lag Fuse; Current: 315 mA; Breaking capacity; 35 A at 250 V
MODULE CONNECTION: DIN 41612 96-way plug
ENVIRONMENTAL CONDITION LIMITS:
Operating temperature: 0 to 55°C (32 to 131°F)
Storage Temperature: -20 to 75°C (-4 to 167°F)
Relative Humidity: 5 to 90% non-condensing (up to 35°C)
SIGNAL CHANNELS: Up to 32 signal pairs unbalanced
INPUT IMPEDENCE: 5K –j220 (typ @ 500Hz)
OFF-STATE LEAKAGE: <3 microAmp DC (-40 to +105°C)
COMMUNICATION PORT: RS-485 differential pair (isolated)
DIGITAL COMMUNICATION SPEED: 9600 baud or 19200 baud

1.1.4.2 HPSM Termination Board Specifications

MOUNTING: Mounts to standard T-type (EN50022 (DIN46277-3)) or G-type (EN50035 (DIN46277-1)) DIN rail.
CONNECTIONS: Phoenix Contact 5.08mm screw terminals for power, RS-485, and I/O; 4-40 Screw terminals for
shield connections; Two 37-pin Sub-D type connectors for universal cable
POWER FUSE: 315mA, 5x20mm
DIMENSIONS: (See Figure 1)
Length = 13.1” (333mm)
Width = 4.8” (122mm)
Height = 2.25” (57mm) [7.15” (103mm) w/MUX installed]

6
 HPSM/32/TB-01 Layout
- + SHD
24Vdc
Supply 7.31" (185.7mm)

TO PLC/DCS CONTROL SYSTEM 2.50" (63.50mm)

13.10" (332.74mm)

CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 13 14 S 15 16 17 18 S 19 20 21 22 S 23 24 25 26 S 27 28 29 30 S 31 32

G A B 24V Input
Neg. (-)
RS-485
SHD
Pos. (+) G A B

ELCON INSTRUMENTS

1700 MUX

4.80" (121.92mm)
OPTIONAL HART FILTERS

Ch. 1-16

Pos. (+)
SHD
Neg. (-)
Ch. 17-32
CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 13 14 S 15 16 17 18 S 19 20 21 22 S 23 24 25 26 S 27 28 29 30 S 31 32

TO FIELD DEVICES
Optional connectors
for remote use

19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

Rev. Date Detalis Apr. No. LY-503700-A1

37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 NOTES: TITLE
Date 14 APR 00
1) HPSM/32/TB-01/HF16 HPSM/32/TB-01
File
Channels 1-16 Filtered Single MUX
HARTpanel Scale
Channels 17-32 Non-filtered Termination
Board ELCON INSTRUMENTS, INC.
2) SHD 1 and SHD 2 may
be connected externally This drawing, including the information it bears, is property of ELCON INSTRUMENTS and must be held in
strict confidence and properly safeguarded at all times. It may not be copied or reproduced, or provided or
revealed to any other party, except with the prior written authorization of ELCON INSTRUMENTS, and any
3) "S" = SHD 1 or SHD 2 authorized copy or reproduction must include this legend.

Figure 1
1.1.4.3 RS-485 Line Specifications

COMMUNICATION PORT: RS-485 differential pair (isolated). An RS-232 to RS-485 converter is needed to
connect the PC host station to the board Terminal block (see Figure 3).
DIGITAL COMMUNICATION SPEED: 9600 bps or 19200 bps (user selectable)
MULTI-DROP ADDRESSING: up to 31 1700 MUX modules (32 channels each)
MULTI-NETWORK OPERATION: Available within software options
MAXIMUM NUMBER OF 1700 MULTIPLEXERS IN NETWORK: 31
NETWORK TOTAL: 992 per Serial Line
MULTI-NETWORK OPERATION: 4 Serial Lines; Available within maintenance software package
SMART PROTOCOL PRESENTLY SUPPORTED: HART
OUTPUT NETWORK: RS-485 (use an RS-232 to RS-485 converter Keithley type M1000 to connect the PC
maintenance station).
BAUD RATE: 9600 bps or 19200 bps (user selectable)
TOTAL NUMBER OF BITS: 11 bits
NUMBER OF DATA BITS: 8 bits
PARITY: ODD
NUMBER OF STOP BITS: 1 bit
TRANSMISSION TYPE: 2-wire

7
1.2 Asset Management Solutions (AMS) Software

AMS software provides an easy-to-use means for integrating various device management software packages into a
unified system. AMS operates under the Microsoft® Windows® format. It combines the various device (or asset)
management tasks into an application with a common look-and-feel and centralized data storage.

AMS provides access to functionality available via the HART communications protocol for any HART device
whose Device Description (DD) is registered with the HART Communication Foundation.

For more information on installation of AMS software, consult the AMS Installation Guide.

1.3 Associated Tools and Test Equipment

No special tools or test equipment are required.

1.4 Quality Assurance

All Elcon Instruments production is performed under a Quality Assurance program following written procedures,
which are specific for each line of instruments, during the manufacturing, intermediate testing and inspection, and
final inspection phases.

Each 1700 MUX unit undergoes accelerated thermic aging (burn-in) for a minimum 200 hours at 50°C (122°F) with
at least 1 cooling thermic cycle at 0°C (32°F) and back to 50°C (122°F). The purpose is to identify weak
components that may develop initial fault mechanisms due to "Infant Mortality". Only after a positive burn-in test,
instruments undergo a complete final inspection performed with computerized automatic testing equipment
specifically developed by Elcon for this purpose.

1.5 Certifications and Compliance

HART Interface Solutions are CE compliant.

This Equipment is suitable for use in Class I, Division 2, Groups A, B, C, and D or non-hazardous locations only.
Equipment must be mounted in an enclosure that meets the requirements of ANSI/ISA S82.01 & S82.03 and the
National Electrical Code.

1.6 Unpacking and Inspection

Upon receipt of the materials, you should check the integrity of the packing and the contents. In case of damage due
to shipping, you should promptly and properly report to the shipper, supplying all necessary information.

If instruments are not for immediate use, we recommend that you check that all characteristics shown on the
instruments label meet order specifications (model, supply voltage and frequency, input/output range, certification,
tag etc.) as well as the actual application requirements.

If not installed, equipment should be stored following recommendations of the next section.

8
1.7 Storage

In case of storage of instruments and accessories, proper care should be taken to protect them from any possible
damage. Always store instruments in their sealed original packaging until they are installed.

Provide adequate protection to prevent damages that may be caused by exposure to:
• Rain, excessive humidity and/or temperature excursions (inadequate sheltering).
• Dust (build-up of a corrosive patina that may cause oxidations and reduce isolation).
• Aggressive and polluting atmospheres with consequent corrosion.
• Access by insects/rodents (damage of packing or content).
• Mechanical shocks or unauthorized packing opening.
• Intense vibrations (loosening of fastened parts, fatigue failures, etc.).
• Any other possible risk.

Make sure the storage temperature does not exceed the limits of –20 to +55°C (-4 to 131°F) for medium/long term
storage (days/months) and -25 to +75°C (-13 to 167°F) for short term storage (a few hours) transportation/shipment.

If inspection is completed, pack instruments in their original packing. List the contents on the packaging to avoid
unnecessary further inspections.

2. Installation
2.1 Environmental Conditions

HIS products, like most modern electronic equipment, can operate in wide temperature and humidity ranges.
However, practical consideration suggests a guideline on operating environment for best results.

• Keep operating temperature below 35°C (95° F), ideally between 20°C and 25°C (68 and 77°F), avoiding wide
and rapid temperature excursions.
• Control relative humidity within 40 to 60% to avoid risks of static charges or condensation.
• Limit the presence of corrosive atmosphere, fumes and dust, sealing and purifying the control room area and
using air filters in the cabinet air intakes (clean cable entry path), if necessary.
• Reduce vibrations (if any) to safe levels.

2.2 Intrinsic Safety

The HIS system can interface HART devices located in Hazardous areas by interposition of suitable galvanically
isolated Intrinsically Safe Barriers. The barriers must allow bidirectional HART signal communication in addition
to the normal 4-20 mA loop current processing.

2.3 Mounting

The 1700 MUX is a plug-in unit that must be inserted in the appropriate termination board position. Exercise care in
the insertion to mate the connector's pins, then firmly press the module to engage the connector. Then fasten the
fixing screws to firmly secure the module to the termination board.

The HPSM is designed to be mounted on T-type or G-type DIN rail. The board should be mounted near the
marshalling panels or termination panels.

9
2.4 Cables

HART signals are brought to the 1700 MUX either by use of the screw-type terminal blocks or by use of the
universal cables on the HPSM panel.

Note: The screw terminals and the universal cable cannot be used
simultaneously on the same HPSM panel!

2.4.1 Universal Cable (See Table 1)

The universal cable allows you to connect the HPSM in parallel to any DCS I/O termination panel. Each cable has a
DB-37 pin connector for connection to the HPSM. On the opposite end, 16 labeled pairs of color-coded wire
provide connection to your termination panel. See Table 1 for pin assignments.

Table 1
P1 & P2 Pinout Codes
Male 37 Pin Signal # Channel Male 37 Pin Signal # Channel
D-sub Pin # D-sub Pin #
1 NC Unused 20 NC Unused
2 1- 1-/ 17- 21 2- 2- /18-
3 1+ 1+/ 17+ 22 2+ 2+ /18+
4 3- 3- /19- 23 4- 4- /20-
5 3+ 3+ /19+ 24 4+ 4+ /20+
6 5- 5- /21- 25 6- 6- /22-
7 5+ 5+ /21+ 26 6+ 6+ /22+
8 7- 7- /23- 27 8- 8- /24-
9 7+ 7+ /23+ 28 8+ 8+ /24+
10 9- 9- /25- 29 10- 10- /26-
11 9+ 9+ /25+ 30 10+ 10+ /26+
12 11- 11- /27- 31 12- 12- /28-
13 11+ 11+ /27+ 32 12+ 12+ /28+
14 13- 13- /29- 33 14- 14- /30-
15 13+ 13+ /29+ 34 14+ 14+ /30+
16 15- 15- /31- 35 16- 16- /32-
17 15+ 15+ /31+ 36 16+ 16+ /32+
18 NC Unused 37 NC Unused
19 NC Unused

10
2.5 Wiring

The 1700 MUX is a plug in unit and is connected to the HPSM by a multipole connector. Therefore, all electrical
connections (supply, field connection, serial lines, etc.) are made at the termination board unit.

2.5.1 Power

Connect 24 VDC to the 3-pin removable terminal at the end of the HPSM. The connector is polarized, so you
cannot insert it incorrectly. The polarity is marked on the board and the terminals.

WARNING! Improper supply connections can seriously damage the instrument

and result in risk of fire or explosion in hazardous locations!

DC SUPPLY REQUIREMENTS: Check correct polarity of supply line, making sure that voltage excursions never
go lower than 21.5 V (including ripple effect) or higher than 28 V.

WARNING! Note that a crude, poorly filtered or unregulated supply can

produce destructive (hundreds of volts) voltage spikes during supply transformer
switch-off transient; this could cause minor problems to electro-mechanical
components like relays or solenoids but will surely degrade or destroy electronic
equipments. In case of doubt, provide over-voltage limiting by adequately
dimensioned surge arresters on primary winding and voltage limiters (power
zeners, zenamic, etc.) on the DC supply line to limit transients within 30-35V
peak.

SUPPLY CONDUCTORS SIZING:

A single unit requiring 100 mA will have a conductor sizing based on mechanical strength rather than current
carrying capacity. A reverse polarity shunt diode and series fuse protection are provided to avoid damaging the
module in case of accidentally reversed polarity connection. In this case, the reverse voltage is clamped at -0.6 V
and the T.B. slow blow fuse blows. Restore correct supply polarity and replace the blown fuse with the spare one
supplied in the T.B. spare fuse holder (take care to reinstall a good, properly sized, new spare fuse!).

2.5.2 RS-485 (See Table 2)

RS-485 wiring is connected as shown in Figure 2. These wires carry data from the HIS to the PC via an
RS-485/RS-232 converter. Connect the converter to a serial port on the PC as indicated in the converter’s
documentation.

Table 2
Maximum Wiring Lengths
Communication Protocol Maximum Cable Length
Feet Meters
RS-232 50 15
RS-485 4000 1200
HART 900 to 6500 275 to 2000
RS-485 cable length can be increased if high performance cables are used.
HART cable length depends on the capacitance of the cable and device, and the load resistor. The general rule is:
R x C < 65ms. Consult “HART- A Technical Description” for more details. This is a free document published by
the HART Communication Foundation.

11
 RS-485 Wiring

30 S 3132

30 S 3132

30 S 3132
30 S 3132

30 S 3132

30 S 3132
ELCON INSTRUMENTS ELCON INSTRUMENTS ELCON INSTRUMENTS

SHD

SHD

SHD

SHD

SHD

SHD
Ch. 1-16

Ch. 1-16
Ch. 1-16

G
G

RS-485

RS-485

RS-485
A

A
A

A
B

B
B

B
Ch. 17-32

Ch. 17-32
Ch. 17-32

24V Input

24V Input

24V Input
1700 MUX 1700 MUX 1700 MUX

G
G

G
Keithley M1000
A

A
RS-232 / RS-485 Converter
A

A
B

B
RS-485 OUT
B

B
+24 Vdc
DATA --
DATA +

G
GND

R
100 ohm termination
Y GR B resistor on the last MUX

Figure 2
2.5.3 Field Connections (See Appendix A)

Field wiring can have many variations, depending on the type of field device. The wiring will either be in parallel or
series. This reference is made to the I/O loop whether the wiring already exists or not. Most wiring scenarios are
shown in Appendix A. If your application does not match those shown, please contact your nearest Elcon
representative (See Chapter 10).

2.5.4 Control Connections

If your unit is wired in parallel, no connections should be made to the control side terminals. When wiring in series,
refer to the appropriate series wiring diagram in Appendix A.

12
2.5.5 HART Communicator

In HART communications, there is one slave (field device) and up to two masters (e.g. Multiplexer, HART
Communicator, I/O module). The HART Communicator can be connected to the field side terminals as a secondary
master. In your software settings, the 1700 MUX must to be the primary master in order to use the HART
Communicator.

There cannot be more than two masters. If three or more masters are connected, a primary/ secondary conflict will
occur and communications will cease with all devices on that loop. When the 1700 MUX is used with a HART
compatible I/O system, the 1700 MUX must be configured as the secondary master. Otherwise, configure the 1700
MUX as the primary master. The HHT is a secondary master by default, and can be connected to the loop when no
other device on that loop is configured as a secondary master.

WARNING! Do not connect the HART Communicator to any Intrinsically Safe

field wiring unless the terminal is approved as Intrinsically Safe and suitable for
the actual hazardous location classification of the specific hazardous location.
Also consider HART Communicator safety parameters and equivalent
capacitance and inductance before concluding that you can safely connect it to
the I. S. side of the circuit.

2.5.5.1 1700 HHT

The 1700 HHT is an adapter (sold separately) that allows the user to replace the 1700 MUX with test points to
connect a Hand Held Communicator. The 1700 HHT can only be inserted in place of the 1700 MUX. Therefore, it
should only be used temporarily. Like the 1700 MUX, the 1700 HHT can be inserted and removed with power
applied to the HPSM.

2.6 Grounding

The HPSM provides two separate shield terminals. The field side terminals are connected to SHD1, which provides
a single point to properly ground field wiring shields. SHD2 is connected to the control side shield terminals and the
power supply shield terminal. This terminal may not be necessary to use, but is available for different applications.

3. Operation
3.1 Initial Setup

The default settings for each 1700 MUX are as follows:

Address = 1
Baud Rate = 19200

13
3.1.1 1700 Settings (See Figure 3)

The User Switches buffer has eight inputs from a low profile DIL switch reachable through the front label.
The functions of the switches are as follows:
Switch 7 (T) Reserved for TEST purposes
Switch 6 (R1) BAUD RATE 1
Switch 5 (R0) BAUD RATE 0
Switch 4 (B4) ADDRESS 4
Switch 3 (B3) ADDRESS 3
Switch 2 (B2) ADDRESS 2
Switch 1 (B1) ADDRESS 1
Switch 0 (B0) ADDRESS 0

Further information is given on the front and side labels (Figure 3). In particular, the side label gives the correct
setting of every DIP switch combination.

1700 MUX Labels

MUX 1700
Multiplexer

ELCON INSTRUMENTS
1 Tx INTRINSIC SAFETY SPECIALISTS
2 Power On
3 Fault 32 Channels MUX 1700 Multiplexer
OFF ON

NORMAL OP. TEST (See Manual)

TEST
T TEST C. N. _______________________
T
R1 BAUD 9600 19200 NOT AVAILABLE
R0 BAUD
B4
B3
R1
R0
RATE SERIAL No. __________________
B2 ADDRESS
B1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
B0
B4 A A
D V
B3 D A
N I
B2 R O L
B1 E T A
S B
L
B0 S E

ELCON
INSTRUMENTS

Figure 3
3.1.1.1 Address

The address of the 1700 MUX is determined by the DIP switches as noted above. Each MUX on the same RS-485
network must have a different address, but they do not have to be sequential and do not necessarily need to start at
address 1. Possible addresses are 1-31. Address 0 is invalid and cannot be used. Note that network properties of
the software setup refers to “multi-dropping.” This refers to multiple 1700 MUXs on the same network, not
multiple devices on the same I/O loop (also referred to as “multi-dropping”). Multi-dropping should be enabled in
the network setup.

14
3.1.1.2 Baud Rate

The baud rate of the 1700 MUX must match the baud rate of the PC Com-Port and the RS-232/RS-485 converter.
All three units must have the same baud rate to function properly. The baud rate can be either 9200 or 19200 and is
selected as shown in Figure 3.

3.1.2 RS-232/RS-485 Converter

An RS-232 to RS-485 converter must be placed between the HIS and the computer’s RS-232 port. Elcon
recommends the Keithley M1000 for non-CE applications. Other models of RS-232 to RS-485 converters can be
used, but have not been tested by Elcon. Alternate brands are available with CE certification.

If only one RS-232 to RS-485 converter is used in setting up the system, then the RS-485 network must be less than
1200 meters (4000 feet). If the network surpasses 4000 feet, an RS-232 to RS-485 repeater can be used. The
Keithley M1000 can fulfill this function. The repeater amplifies the original RS-485 signal when it is transmitted
over long distances.

3.2 Start-up Sequence

Proper start-up sequence for the 1700 MUX is as follows:

1. Make all field and control connections to the HPSM
2. Connect RS-485 wires and adjust network settings
3. Apply field power or source 4-20mA
4. Turn on power to or plug in the 1700 MUX
5. After the 1700 MUX has completed the start-up sequence, then start AMS

3.3 Controls

The only controls on the Elcon equipment are the DIP switches noted above. All other settings are a function of the
software. Please refer to your software instruction manual for further details.

3.4 Indicators (See Figure 3)

Three LEDs on the front of the 1700 MUX indicate status. Normal operation is as follows:

• Power ON: Green LED lit when power is applied to the 1700 MUX. Power is automatically applied when the
1700 MUX is plugged into the HPSM.
• Tx: Shows 1700 MUX communication with field devices.
• Fault: Fault LED should not be lit during normal operation.

One LED on the termination board is a power indication showing 24 VDC available.

3.5 Modes of Operation

• SCAN MODE: Command to the 1700 MUX from the software telling the 1700 MUX to periodically scan each
device automatically. Otherwise, the 1700 MUX will only communicate with a device when told to do so by
the software.
• BURST MODE: When a field device is in burst mode, it automatically sends information without being
commanded to do so. This is a break from the master-slave nature of HART communication, but the 1700
MUX will support it when burst mode is selected in the software.

15
4. Theory of Operation (Principles of Operation)
Referring to Figure 4, the heart of the 1700 MUX is the microprocessor. One serial port together with the HART
modem generates the physical layer of the HART protocol, while the channel select circuit together with the channel
multiplexer links one specific channel (device) at a time. An RS-485 circuit completes the gateway between the
maintenance workstation PC and the devices. The user switches circuit provides information required by the 1700
MUX for initialization and configuration. Specifically, the baud rate for communications to the maintenance
workstation PC and the 1700 MUX address are selected.

1700 MUX Block diagram

USER
Channel 1 SWITCHES
M
U
L MICROPROCESSOR
T
I CHANNEL
P SELECT
L
E
X
E From the
Channel 32 R HART
Maintenance
Workstation
RS-485
MODEM CIRCUIT (Through the
SERIAL PORTS RS-485/232
Converter)

Figure 4
4.1 HART Filters

HART filters may be necessary for certain systems for the following reasons:

• To increase low output impedance of DCS so the HART signals have sufficient amplitude
• To remove fast transients from step changes in DCS output
• To prevent disruption of DCS circuitry by HART signals

Note that when a HART filter is used, the HART signal will not be available to any monitoring equipment on the
control side of the HPSM, including the DCS or HHT. Elcon recommends HART filters for any HART output
signal (valves). DCS systems from Bailey, Fischer and Porter, Honeywell, Foxboro, and Fisher-Rosemount may
require HART filters. Consult with the valve or I/P supplier to know if filters are required for a specific control
system or field device.

HPSM/32/TB-01/HF16: Channels 1-16 have HART filters. Channels 17-32 do not.

HPSM/32/TB-01/HF32: Channels 1-32 have HART filters.

CAUTION: HART filters are only for use with output signals. Transmitters will
not function when connected to a channel with a hart filter

16
4.2 Multiple Multiplexers

Up to 31 1700 MUXs can be connected on a single RS-485 network to support 992 devices. Multiple 1700 MUXs
are connected in daisy-chain form, and redundant terminals are provided for this on each board.

5. Troubleshooting
Due to the modular nature of the HIS system, a communication failure may occur anywhere in the data transfer link
from the software to the field device. In order to identify where the loss of communication has occurred, it is
important to understand which components are working correctly. Often, some simple checks will save hours of
troubleshooting. Some of the most common mistakes are: improper wiring connections, baud rate mismatches,
improper network settings, and improper addressing of the 1700 MUX.

5.1 1700 MUX

The LEDs at the front of the 1700 MUX provide a convenient indication to the user that the 1700 MUX is
operational. During normal operation, the “Power On” light should be on. The “Fault” light should be off. The
“Tx” light may either be off or flashing steadily.

When power to the 1700 MUX is cycled or a “Reset” command is issued, all the lights will come on. Then, the
“Power On” light only will come on. For the next 60 to 120 seconds, the “Tx” light will flash three times then
pause. During this time, the 1700 MUX is scanning each of the 32 channels. When it is finished, the “Tx” light will
either flash steadily or turn off altogether. If you see all of the above occur, the 1700 MUX is operating properly.

In addition, the TEST setting on the option switches can be used to gain confidence that the module is functioning.
Follow the procedure below to use this feature:
1. With the power off, set the end switch to the TEST position (ON). The module should not be connected to
the RS-485 network, the RS-485 address switches have no effect. If an RS-485 terminal is connected to the
module, the BAUD rate switches should be set.
2. Switch power on. The LEDs should light for about 1 second each in sequence (RED, YELLOW,
GREEN…).
3. If the LEDs do not flash, there is a fault with the module and it should be returned for replacement.
4. To return to normal operation, remove power to the 1700 MUX and set the TEST switch to the off position.
Ensure that the correct BAUD rate is selected and that an RS-485 address is set. Then, re-apply power.
If you suspect the 1700 MUX is not functioning properly, use Table 3 below.

Table 3
1700 MUX LED Indications
Symptom Cause Solution
Lights flash sequentially TEST switch is ON Switch off the power
Put TEST switch OFF
Restart the system
No LEDs lit Power fail or fuse open Check 24 VDC supply LED
and fuse
Only yellow LED lit Scanning is disabled. Check wiring continuity
If scanning is enabled, then no
HART devices were detected
by the 1700 MUX
Red LED lit Self-test fault Contact Elcon Instruments for
further instructions

17
6. Maintenance
Elcon Instruments apparatus do not require any particular maintenance under normal operating conditions. They are
designed to operate trouble-free and with high stability for long periods.

WARNING! Any repair made by unauthorized personnel may completely

invalidate the safety characteristics of the unit and could void all warranties.
Repair not made by Elcon Instruments is fully at user's risk and responsibility.
In addition, the warranty terms of the unit will be null and void to all effect.

7. Parts List
Table 4 is a representation of the parts on the HPSM that can be replaced by the user. There are no parts in or on the
1700 MUX itself that can be replaced in the field. If any other parts need to be replaced, please contact your nearest
Elcon Instruments representative for instructions.

Table 4
Replaceable Parts
Part Number Description
501300 Supply ID label
502401 Terminal blocks MVSTBW 2.5/3-ST-5.08
508100 Fuse 5x20 time-lag, 3.15 Amp F1
508200 Vertical fuse holder for 3.15 Amp F1
508300 50mA TR5 Microfuse L1-32

8. Warranty
Elcon offers an extended period of warranty assistance performed at their factory. Each instrument to be repaired
will be thoroughly analyzed to locate the cause and mode of possible faults and correlate them with the initial,
intermediate, and final testing documentation. This allows Elcon to trace with more accuracy the fault causes, thus
obtaining valuable indications, reliability statistics, and qualitative evaluation for the purpose of maintaining the
quality and reliability of their products under strict control.

WARRANTY CONDITIONS.
Elcon Instruments certifies that all the instruments of their manufacture are immune from defects or loss of essential
quality, and whenever they are apparatus, Elcon also guarantees proper operation. The duration of the warranty
period is clearly indicated in the order confirmation and starts from the date of delivery or on-site test (if required).
Unless otherwise specified, the warranty is for 12 months from delivery date. The warranty does not cover
consumable items.

TERMS - CONDITIONS - WARRANTY LIMITS.

1. Form of report
The action due to the customer for vices, defects, or loss of quality is subject to the terms of articles 1495, 1497
C.C. (Italian Civil Code). The denunciation of the defect or quality loss must be made by the customer by
registered mail, telex, fax, or equivalent written form to be sent to the main office of Elcon Instruments.

18
2. Limit-burden obligation of the customer to conserve the warranty

a) The warranty is limited to repairing and substitution, FOB Elcon Instruments factory, of the useless parts, for a
confirmed defect of materials and/or workmanship, free of charge, and the remaining, shipping, dismounting
and mounting expenses (operations that in any case must be done in accordance with the supplier), at the
customer's charge. In no case will Elcon Instruments be held responsible for expenses, for loss of profit and/or
damage, direct or indirect, that can be incurred by the customer due to a fault or defect of the material.

b) The warranty ends for instruments or materials damaged by:

• Shipment
• Storage not conforming to the instruction manual specifications
• Incorrect installation
• Loss of adequate protection for the type of installation (mechanical, climatic, etc.)
• Incorrect application of power supply voltage
• Erroneous wiring of the power supply line (applied on input or output measuring circuits)

c) The warranty ends for instruments or materials if repaired, modified, or simply tampered with, even if only in
part, by personnel not authorized by Elcon Instruments and also ends if used in improper way and/or not
conforming with the given instructions.

d) The warranty is valid only if payment has been received from the customer in a timely fashion, as per the
original agreement; otherwise it is void.

e) All parts that are subject to normal wear and inevitable deterioration are excluded from this warranty.

f) In case of having to return the instrument to one of the Elcon Instruments authorized labs for repair, the
customer shall obtain a written authorization with shipping instructions from Elcon Instruments. Shipment
expenses, all the concerned burdens, and the risk of loss or damage of the returned instrument are exclusively
born by the customer. The same rules apply also when the instrument needs to be replaced.

g) During the warranty period, the customer will allow any personnel appointed by Elcon Instruments to execute
control of the instruments and materials.

h) The customer cannot require cancellation of the contract in reason of vices or defects, but only their elimination
or, when they cannot be repaired, the replacement of the instruments, if available on the market. In case the
replacement is for any reason impossible, Elcon Instruments has the faculty to offer instruments of the same or
equivalent type, quality and efficiency, suitable to the same use. If the customer refuses such offer without
justified motivation, he is entitled to reimbursement of the money already paid or a refund of the real incurred
expenses.

i) For items subsupplied by Elcon Instruments the standard warranty terms as given by the original manufacturer
are applicable.

j) The warranty must be considered for material repaired, substituted on ex works basis.

Such warranty replaces and supersedes any other declared or implicit warranty.

19
9. Glossary
DCS Distributed Control System
FSK Frequency Shift Keying
HART® Highway Addressable Remote Transducer
HHT Hand Held Terminal
IS Intrinsic Safety
MW Maintenance Workstation
PC Personal Computer
PLC Programmable Logic Controller
TB Termination Board

10. Contact Information

Elcon Instruments SRL
Italy
Via delle Industrie, 4
20050 Mezzago (MI)
PO Box 14 - 20050 Mezzago (MI)
Telephone: ++39 039 6292 1
General Fax: ++39 039 6292 240
Sales Fax: ++39 039 6292 290
E-mail: info@elconinst.com
Internet: www.elconinst.com

Elcon Instruments Inc.

USA
1275 Buford Hwy
Suite 105
Suwanee, GA 30024
Telephone: ++1 770 271 5519
Fax: ++1 770 271 8049
Toll Free: ++1 800 253 5266
E-mail: mvivelo@compuserve.com

Elcon Instruments
Asia - Pacific
Suite 5003 Bayside Plaza
376-380 Bay St.
Brighton - Le - Sands
Sydney, N.S.W. 2216 - Australia
Telephone: ++61 2 9556 1188
Fax: ++61 2 9556 3400
E-mail: shaneparr@csi.com

Elcon Intrinsic Safety LTD

United Kingdom
Heighington Lane
Newton Aycliffe
Co Durham
DL5 6XZ
Telephone: ++44 1325 314 455
Fax: ++44 1325 314 456

20
 Appendix A

I/O
Wiring Diagram

21
 TO PLC/DCS CONTROL SYSTEM
CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 1314 S 15 16 17 18 S 19 20 21 22 S 23 24 25 26 S 2728 29 30 S 31 32

Neg. (-) G A B 24V Input

250 ohms RS-485

Pos. (+) SHD
G A B

24 Vdc

1700 MUX

ELCON INSTRUMENTS
Ch. 1-16
Pos. (+)
(+)
SHD
Neg. (-)
(-)
4-20 mA Ch. 17-32
CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 13 14 S 1516 17 18 S 19 20 2122 S 23 2425 26 S 27 28 29 30 S 31 32

TO FIELD DEVICES
Loop Powered
Transmitter
Loop Powered Transmitters

22
TO PLC/DCS CONTROL SYSTEM
CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 1314 S 15 16 17 18 S 19 20 21 22 S 23 24 25 26 S 2728 29 30 S 31 32

Neg. (-) G A B 24V Input

250 ohms RS-485

Pos. (+) SHD
G A B
1700 MUX

ELCON INSTRUMENTS

XMTR Power
Analog Input Series Wiring Diagram

Ch. 1-16
Pos. (+)
(+)
SHD
Neg. (-)
(-)
4-20 mA Ch. 17-32
CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 13 14 S 1516 17 18 S 19 20 2122 S 23 2425 26 S 27 28 29 30 S 31 32

TO FIELD DEVICES
Self Powered
Transmitter

Self-Powered Transmitters
 CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 13 14 S 15 16 17 29 30 S 31 32

Neg. (-) G A B 24V Input

RS-485
Pos. (+) SHD
G A B

1700 MUX

ELCON INSTRUMENTS
Ch. 1-16
Pos. (+)
SHD
Neg. (-)
Ch. 17-32
CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 13 14 S 15 16 17 18 30 S 31 32

4-20 mA 250 ohms TO FIELD DEVICES

(+)
24 VDC
(-)

23
Note: Field wiring and cable
interface cannot be used on the
same channels at the same time.

Loop Powered
Transmitter

Channels 1-16

4-20 mA 250 ohms

(+)
Analog Input Parallel Wiring Diagram

24 VDC
(-)

Loop Powered
Transmitter
 TO PLC/DCS CONTROL SYSTEM
CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 13 14 S 15 16 17 18 S 19 20 21 22 S 23 24 25 26 S 27 28 29 30 S 31 32

Neg. (-) G A B 24V Input

4-20 mA RS-485
Source Pos. (+) SHD
G A B
1700 MUX

ELCON INSTRUMENTS

24
Ch. 1-16
Pos. (+)
SHD
Neg. (-)
4-20 mA Ch. 17-32
CHANNEL # 1 2 S 3 4 5 6 S 7 8 9 10 S 11 12 13 14 S 15 16 17 18 S 19 20 21 22 S 23 24 25 26 S 27 28 29 30 S 31 32

TO FIELD DEVICES
Analog Output Wiring Diagram

Analog Outputs (Valve, I/P)