FOX-41A

Interface Unit
Instruction Manual

NR Electric Co., Ltd.

 FOX-41A Interface Unit

Preface

Introduction

This guide and the relevant operating or service manual documentation for the equipment provide
full information on safe handling, commissioning and testing of this equipment.

Documentation for equipment ordered from NR is dispatched separately from manufactured goods
and may not be received at the same time. Therefore this guide is provided to ensure that printed
information normally present on equipment is fully understood by the recipient.

Before carrying out any work on the equipment the user should be familiar with the contents of this
manual, and read relevant chapter carefully.

This chapter describes the safety precautions recommended when using the e quipment. Before
installing and using the equipment, this chapter must be thoroughly read and understood.

Health and Safety

The information in this chapter of the equipment documentation is intended to ensure that
equipment is properly installed and handled in order to maintain it in a safe condition.

When electrical equipment is in operation, dangerous voltages will be present in certain parts of
the equipment. Failure to observe warning notices, incorrect use, or improper use may endanger
personnel and equipment and cause personal injury or physical damage.

Before working in the terminal strip area, the equipment must be isolated.

Proper and safe operation of the equipment depends on appropriate shipping and handling,
proper storage, installation and commissioning, and on careful operation, maintenance and
servicing. For this reason only qualified personnel may work on or operate the equipment.

Qualified personnel are individuals who:

 Are familiar with the installation, commissioning, and operation of the e quipment and of the
system to which it is being connected;

 Are able to safely perform switching operations in accordance with accepted safety
engineering practices and are authorized to energize and de-energize equipment and to
isolate, ground, and label it;

 Are trained in the care and use of safety apparatus in accordance with safety engineering
practices;

 Are trained in emergency procedures (first aid).

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Instructions and Warnings

The following indicators and standard definitions are used:

DANGER means that death, severe personal injury, or considerable equipment damage will
occur if safety precautions are disregarded.

WARNING means that death, severe personal, or considerable equipment damage could occur
if safety precautions are disregarded.

CAUTION means that light personal injury or equipment damage may occur if safety
precautions are disregarded. This particularly applies to damage to the device and to
resulting damage of the protected equipment.

WARNING!

The firmware may be upgraded to add new features or enhance/modify existing features, please
make sure that the version of this manual is compatible with the product in your hand.

WARNING!

During operation of electrical equipment, certain parts of these devices are under high voltage.
Severe personal injury or significant equipment damage could result from improper behavior.

Only qualified personnel should work on this equipment or in the vicinity of this equipment. These
personnel must be familiar with all warnings and service procedures described in this manual, as
well as safety regulations.

In particular, the general facility and safety regulations for work with high -voltage equipment must
be observed. Noncompliance may result in death, injury, or significant equipment damage.

WARNING!

 Exposed terminals

Do not touch the exposed terminals of this equipment while the power is on, as the high voltage
generated is dangerous

 Residual voltage

Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It
takes a few seconds for the voltage to discharge.

CAUTION!

 Earth

The earthing terminal of the equipment must be securely earthed .

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 FOX-41A Interface Unit

 Operating environment

The equipment must only be used within the range of ambient environment detailed in the
specification and in an environment free of abnormal vibration.

 Ratings

Before applying the DC power supply to the equipment, check that they conform to the equipment
ratings.

 Printed circuit board

Do not attach and remove printed circuit boards when DC power to the equipment is on, as this
may cause the equipment to malfunction.

 External circuit

When connecting the output contacts of the equipment to an external circuit, car efully check the
supply voltage used in order to prevent the connected circuit from overheating.

 Connection cable

Carefully handle the connection cable without applying excessive force.

Copyright © 2008 NR. All rights reserved.

We reserve all rights to this document and to the information contained herein. Improper use in particular reproduction and dissemination
to third parties is strictly forbidden except where expressly authorized.

The information in this manual is carefully checked periodicall y, and necessary corrections will be included in future editions. If
nevertheless any errors are detected, suggestions for correction or improvement are greatly appreciated.

We reserve the rights to make technical improvements without notice.

NR ELECTRIC CO., LTD. Tel: +86-25-87178888

Headquarters: 69, Suyuan Avenue, Jiangning, Nanjing 211102, China Fax: +86-25-87178999
Manufactory: 18, Xinfeng Road, Jiangning, Nanjing 211111, China Website: www.nrelect.com, www.nrec.com

PN: ZL_FOX-41A_X_Instruction Manual_EN_Domestic General_X Version: R1.00

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Table of Contents
Preface ........................................................................................................................................ i

Introduction ......................................................................................................................... i

Health and Safety ................................................................................................................ i

Instructions and Warnings ................................................................................................. ii

Table of Contents....................................................................................................................... v

Chapter 1 Introduction .............................................................................................................. 1

1.1 Application ............................................................................................................... 1

1.2 Features.................................................................................................................... 1

1.3 Warranty Conditions ................................................................................................ 2

Chapter 2 Technical Data .......................................................................................................... 3

2.1 General Specification............................................................................................... 3

2.1.1 Electrical Specifications................................................................................ 3

2.1.1.1 Power Supply ........................................................................................... 3

2.1.1.2 Binary Input .............................................................................................. 3
2.1.1.3 Binary Output ........................................................................................... 3

2.1.2 Fiber-optic Parameter.................................................................................... 4

2.1.3 Mechanical Specifications ............................................................................ 4

2.1.4 Ambient Temperature and Humidity............................................................. 4

2.1.5 Communication Interfaces ............................................................................ 5

2.1.6 Type Test ........................................................................................................ 6

2.1.6.1 Environmental Tests ................................................................................. 6

2.1.6.2 Mechanical Tests...................................................................................... 6
2.1.6.3 Electrical Tests ......................................................................................... 6
2.1.6.4 Electromagnetic Compatibility................................................................... 6

2.2 Certification .............................................................................................................. 7

Chapter 3 Operation Theory...................................................................................................... 9

3.1 Operation Theory ..................................................................................................... 9

3.2 Communication Interface ...................................................................................... 10

3.3 Pilot Identification Code ........................................................................................ 12

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3.4 Reception Signal Delay and Extension................................................................. 12

3.5 Supervision, Alarm and Blocking.......................................................................... 13

3.5.1 Channel Abnormality Detection .................................................................. 13

3.5.2 Transmitted and Received Signal Abnormality Detection ......................... 13

3.5.3 Equipment Abnormality Self Detection ...................................................... 14

3.5.4 Processing of the Alarm and Blocking ....................................................... 14

3.6 Communication Channel Status............................................................................ 14

Chapter 4 Hardware Description............................................................................................. 17

4.1 Overview................................................................................................................. 17

4.2 Basic Enclosure ..................................................................................................... 18

4.3 DC Module .............................................................................................................. 18

4.4 EO Module .............................................................................................................. 19

4.5 CPU Module............................................................................................................ 20

4.6 HMI Module............................................................................................................. 21

4.7 COM Module ........................................................................................................... 21

4.8 OPT1 Module .......................................................................................................... 23

4.9 SIG Module ............................................................................................................. 25

4.10 OUT1 Module .......................................................................................................... 26

4.11 OUT2 Module .......................................................................................................... 27

4.12 OUT Module............................................................................................................ 27

Chapter 5 HMI Operation Introduction ................................................................................... 29

5.1 Human Machine Interface Overview ..................................................................... 29

5.1.1 Design .......................................................................................................... 29

5.1.2 Functionality ................................................................................................ 29

5.1.3 Keypad and Keys ......................................................................................... 29

5.1.4 LED Indicators ............................................................................................. 30

5.1.5 Commissioning Port.................................................................................... 31

5.2 Understand the HMI Menu Tree ............................................................................. 31

5.2.1 Overview ...................................................................................................... 31

5.2.2 “VALUES” Menu .......................................................................................... 32

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5.2.3 “REPORT” Menu.......................................................................................... 32

5.2.4 “PRINT” Menu .............................................................................................. 33

5.2.5 “SETTINGS” Menu....................................................................................... 33

5.2.6 “CLOCK” Menu ............................................................................................ 34

5.2.7 “VERSION” Menu ........................................................................................ 34

5.2.8 “EXIT” Menu ................................................................................................ 34

5.3 Understand the LCD Display ................................................................................. 35

5.3.1 Default Display under Normal Condition.................................................... 35

5.3.2 Display under Abnormal Condition ............................................................ 35

5.4 View the Settings ................................................................................................... 36

5.5 View the Values ...................................................................................................... 37

5.5.1 View the Status of Binary Inputs................................................................. 37

5.5.2 View the Status of Communication Channel.............................................. 38

5.6 View Software Version ........................................................................................... 39

5.7 View the Reports .................................................................................................... 40

5.7.1 View Reports through LCD ......................................................................... 40

5.7.2 View Reports by Printing............................................................................. 40

5.8 Operation through Keypad .................................................................................... 40

5.8.1 Change the Settings .................................................................................... 40

5.8.2 Switch Active Setting Group ....................................................................... 41

5.8.3 Print Reports................................................................................................ 42

5.8.4 Delete Reports ............................................................................................. 42

5.8.5 Clock Set ...................................................................................................... 42

Chapter 6 Settings ................................................................................................................... 45

6.1 Overview................................................................................................................. 45

6.2 Equipment Settings (EQUIP SETTINGS) ............................................................... 45

6.3 Communication Channel Settings (CH SETTINGS) ............................................. 46

6.4 Ethernet Settings (IP Address) .............................................................................. 47

Chapter 7 Communication ...................................................................................................... 49

7.1 General ................................................................................................................... 49

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7.2 Communication Module......................................................................................... 49

7.2.1 RS-485 Interface .......................................................................................... 49

7.2.1.1 EIA RS-485 Standardized Bus ................................................................ 49

7.2.1.2 Bus Termination...................................................................................... 49
7.2.1.3 Bus Connections & Topologies ............................................................... 50
7.2.1.4 Biasing ................................................................................................... 50

7.2.2 Ethernet Interface ........................................................................................ 51

7.2.2.1 Ethernet Standardized Communication Cable......................................... 51

7.2.2.2 Connections and Topologies................................................................... 51

7.3 IEC60870-5-103 Interface ....................................................................................... 52

7.3.1 Physical Connection and Link Layer.......................................................... 52

7.3.2 Initialization.................................................................................................. 52

7.3.3 Time Synchronization.................................................................................. 52

7.3.4 Spontaneous Events ................................................................................... 53

7.3.5 General Interrogation .................................................................................. 54

7.3.6 Generic Functions ....................................................................................... 54

7.4 IEC60870-5-103 Interface over Ethernet................................................................ 54

Chapter 8 Installation .............................................................................................................. 55

8.1 General ................................................................................................................... 55

8.2 Safety Instructions ................................................................................................. 55

8.3 Checking the Shipment ......................................................................................... 56

8.4 Material and Tools Required.................................................................................. 56

8.5 Device Location and Ambient Conditions ............................................................ 56

8.6 Mechanical Installation .......................................................................................... 57

8.7 Electrical Installation and Wiring .......................................................................... 58

8.7.1 Grounding Guidelines ................................................................................. 58

8.7.2 Cubicle Grounding ...................................................................................... 58

8.7.3 Ground Connection on the Device ............................................................. 59

8.7.4 Grounding Strips and their Installation ...................................................... 59

8.7.5 Guidelines for Wiring .................................................................................. 60

8.7.6 Wiring for Electrical Cables ........................................................................ 60

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Chapter 9 Commissioning ...................................................................................................... 61

9.1 General ................................................................................................................... 61

9.2 Safety Instructions ................................................................................................. 61

9.3 Setting Familiarization ........................................................................................... 61

9.4 Product Checks...................................................................................................... 62

9.4.1 With the Device De -energized ..................................................................... 62

9.4.1.1 Visual Inspection .................................................................................... 62

9.4.1.2 Insulation Test (if required) ..................................................................... 63
9.4.1.3 Check the Jumpers ................................................................................ 63
9.4.1.4 Auxiliary Supply...................................................................................... 63

9.4.2 With the Device Energized .......................................................................... 64

9.4.2.1 Front Panel LCD Display ........................................................................ 64

9.4.2.2 Date and Time ........................................................................................ 64
9.4.2.3 Light Emitting Diodes (LEDs).................................................................. 64
9.4.2.4 Testing the Binary Inputs ........................................................................ 64

9.4.3 Functional Testing ....................................................................................... 65

9.4.4 Final Checks ................................................................................................ 65

Chapter 10 Maintenance.......................................................................................................... 67

10.1 Maintenance Schedule........................................................................................... 67

10.2 Regular Testing ...................................................................................................... 67

10.3 Failure Tracing and Repair .................................................................................... 67

10.4 Replace Failed Modules......................................................................................... 67

Chapter 11 Decommissioning and Disposal .......................................................................... 69

11.1 Decommissioning .................................................................................................. 69

11.1.1 Switching off ................................................................................................ 69

11.1.2 Disconnecting cables .................................................................................. 69

11.1.3 Dismantling .................................................................................................. 69

11.2 Disposal.................................................................................................................. 69

Chapter 12 Manual Version History ........................................................................................ 71

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 Chapter 1 Introduction

Chapter 1 Introduction

1.1 Application

The FOX-41A is a new approach to teleprotection signaling. It has eight contact inputs and eight
contact outputs. The status of these inputs and outputs are encoded and communicated though
the fiber-optic channels with the rate of 64kbit/s or 2048kbit/s. Two interface units can be
communicated each other though a dedicated fiber-optic channel or the digital communication
units (PCM, SDH microwave/fiber-optic etc.).

The highly reliable error-control method of the FOX-41A provides excellent performance
characteristics to meet the most demanding security and dependability requirements for
teleprotection applications.

The FOX-41A can cooperate with the RCS-900 series high voltage level numerical protection
device in harmony. For example, the FOX-41A can interchange the teleprotection signals when is
cooperates with the RCS-902 (Line Distance Relay). The following figure shows the typical
application of the FOX-41A in line protection scheme.

RCS-902 RCS-902

Teleprotection signals
FOX-41A FOX-41A

Figure 1.1-1 Typical application of the FOX-41A in line protection scheme

1.2 Features

 Adoption of high performance processor and special serial communication control chip makes
this interface unit with high integration and reliability.

 High speed synchronization communication technology and HDLC communication protocol is

adopted in the FOX-41A, so the interface unit has high transmission rate and anti-interference
ability.

 By setting the relevant parameters through HMI, the synchronization communication rate can
be set as 64kbit/s or 2048kbit/s, and the communication medium can be selected a dedicated
fiber-optic channel or a digital multiplexer.

 The highly reliable reception error-code check method ensures the validity of the received

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Chapter 1 Introduction

information. When the FOX-41A checks that the received information is incorrect, it will
discard the relevant data frame.

 The channel supervision function of the FOX-41A is used to monitor the state of the
communication channel. If the FOX-41A checks that the channel is interrupted, it will block all
the outputs and issue a corresponding alarm signal.

 Eight LED indicators are used to indicate the status of each input respectively, and another
eight LED indicators are used to indicate the status of each output respectively.

 Four received teleprotection commands can be output with a configurable time delay and the
width of the output also can be extended respectively.

 The FOX-41A can record all the reception and transmission procedures and all alarm
information.

 The FOX-41A can communicate with the SCADA or SAS through RS-485 interfaces or
Ethernet interfaces, and the communication protocol is IEC 60870 -5-103.

 Three clock synchronization signals are supported in this device: PPS, PPM and IRIG-B.

1.3 Warranty Conditions

The warranty conditions are defined in the supply contract.

The manufacturers accept no responsibility for any damage resulting from improper use of the
FOX-41A.

Other special agreements are only valid if they are included in the contract.

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 Chapter 2 Technical Data

Chapter 2 Technical Data

2.1 General Specification

2.1.1 Electrical Specifications

2.1.1.1 Power Supply

Rated Voltage (Un) 110Vdc, 125Vdc, 220Vdc, 250Vdc

Variation (80% ~ 120%)Un
Ripple in the DC
Max 15% of the DC value. Per IEC 60255-11
auxiliary voltage
Per IEC 61000-4-11, IEC 60255-11:1979
Voltage dips and voltage short
20ms for interruption without de-energizing, dips 60% of Un
interruptions
without reset up to 100ms
Quiescent condition < 20W
Burden
Operating condition < 30W
Backup battery type ML2032, 3.6V, 65mAh

2.1.1.2 Binary Input

Rated Voltage 110Vdc 125Vdc 220Vdc 250Vdc

Pickup voltage 77.0Vdc 87.5Vdc 154Vdc 175.0Vdc
Dropout voltage 60.5Vdc 68.8Vdc 121Vdc 137.5Vdc
Maximum permitted voltage 150Vdc 150Vdc 300Vdc 300Vdc
Withstand 2000Vac
Resolving time for logic input <1ms

2.1.1.3 Binary Output

Output model Potential-free contact

Max system voltage 250Vac/dc
Making Capacity > 1000W at L/R=40ms
Quick teleprotection Output: 0.1A inductive (L/R=40ms)
Breaking capacity at 250Vdc Other teleprotection Output: 0.2A inductive (L/R=40ms)
Signal Output: 0.3A inductive (L/R=40ms)
Quick teleprotection Output: 1A
Continuous carry Other teleprotection Output: 5A
Signal Output: 8A
Short duration current 50A for 200ms
Teleprotection Output: 5ms/10ms
Pickup time(Typical/Max)
Signal Output: 10ms/15ms

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Chapter 2 Technical Data

Teleprotection Output: 8ms/10ms

Dropout time (Typical/Max)
Signal Output: 4ms/10ms
Bounce time 1ms
Loaded contact 100,000 operations minimum
Durability
Unloaded contact 10,000,000 operations minimum

2.1.2 Fiber-optic Parameter

Transmission power -7dBm ~ -12dBm

Reception sensitivity -35dBm
Transmission media 9/125μm Single mode optic
Wave length 1.3μm
Connector type FC/PC
Transmission distance ≤ 65km (Special optical fiber channel)
Quick teleprotection signal contact:
Teleprotection signal output 5 ~ 8ms (@ 64kbit/s), 3 ~ 6ms (@ 2048kbit/s)
time Other teleprotection signal contact:
Add 3ms on the base of the quick received signal contact

2.1.3 Mechanical Specifications

Enclosure dimensions
482.6×177.0×291.0 (unit: mm)
(W×H×D)
Trepanning dimensions
450.0×179.0, M6 screw
(W×H)
Mounting Way Flush mounted
Weight per device Approx. 5kg
Small control module: 18 LED indicators, a 9-key keypad, a
Local control panel signal resetting button, a 128×64-dot LCD and a RS-232 port
for configuration tool
Display language English
Housing material Aluminum
Housing color Silver grey
Location of terminals Rear panel of the device
Front side: IP51
Protection class
Rear side, connection terminals: IP20
(per IEC60529:1989)
Other Sides: IP30

2.1.4 Ambient Temperature and Humidity

Operating temperature range -25°C ~ +55°C

Transport and storage temperature range -40°C ~ +70°C
Permissible humidity 5% ~ 95%, condensation not permissible

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2.1.5 Communication Interfaces

Interface for communicating with RTU/SCADA

Port number 2
Baud rate 4800~38400bps
Transmission distance <1000m@4800bps
Electrical Maximal capacity 32
Twisted pair Screened twisted pair cable
Protocol IEC 60870-5-103: 1997
Safety level Isolation to ELV level
Port number 2
RS-485
Connector type ST
(EIA)
Baud rate 4800~38400bps
Transmission standard 100Base-FX
Optical Transmission distance <1500m
(Optional) Optical fiber type Multi-mode fiber
Wave length 850/820nm
Fiber size 62.5/125μm (core DIA/cladding DIA)
Protocol IEC 60870-5-103: 1997
Safety level Isolation to ELV level
Port number 2
Connector type RJ-45
Transmission rate 100Mbits/s
Electrical Transmission standard 100Base-TX
Transmission distance <100m
Protocol IEC 60870-5-103: 1997 or IEC 61850
Safety level Isolation to ELV level
Port number 2
Connector type SC
Ethernet
Transmission rate 100Mbits
Transmission standard 100Base-TX
Transmission distance <1500m
Optical
Optical fiber type Multi-mode or single-mode
(Optional)
Wave length 853/1310nm for multi-mode
1310/1550nm for single-mode
Fiber size 62.5/125μm (core DIA/cladding DIA)
Protocol IEC 60870-5-103: 1997 or IEC 61850
Safety level Isolation to ELV level
Interface for communicating with printer
Prot number 1
Baud Rate 4800bps or 9600bps
RS-232 (EIA)
Printer type EPSON® 300K printer
Safety level Isolation to ELV level

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Chapter 2 Technical Data

Interface for clock synchronization

Port number 1
Transmission distance <500m
RS-485 (EIA) Maximal capacity 32
Timing standard PPS, IRIG-B
Safety level Isolation to ELV level
Front interface for local HMI with personal computer via RCSPC software
Port number 1
Local HMI communication
Application
Download protection program
RS-232(EIA)
Baud rate 4800~9600bps
Connector type 9 pin D-type female connector
Safety level Isolation to ELV level

2.1.6 Type Test

2.1.6.1 Environmental Tests

Dry heat test IEC60068-2-2:1974, 16 h at +55°C

Dry cold test IEC60068-2-1:1990, 16 h at -25°C
IEC60068-2-30:1980, two (12+12 hours) cycles, 95%RH,
Damp heat test, cyclic
low temperature +25°C, high temperature +55°C

2.1.6.2 Mechanical Tests

Vibration IEC60255-21-1:1988, Class I

Shock and bump IEC60255-21-2:1988, Class I

2.1.6.3 Electrical Tests

Dielectric tests IEC60255-5:2000, test voltage: 2kV, 50Hz, 1min

IEC60255-5:2000, test voltage: 5kV, unipolar
Impulse voltage tests
impulses, waveform 1.2/50μs, source energy 0.5J
Insulation
IEC60255-5:2000, insulation resistance >100MΩ, 500Vdc
measurement

2.1.6.4 Electromagnetic Compatibility

1MHz burst disturbance tests IEC60255-22-1:1988

(idt IEC61000-4-2:1995), Class III
- Common mode 2.5kV
- Differential mode 1.0kV
Electrostatic discharge tests IEC60255-22-2 :1996
(idt IEC 61000-4-2) Class IV
-For contact discharge 8.0kV
-For air discharge 15.0kV
Radio frequency interference tests IEC60255-22-3:2000
(idt IEC 61000-4-3:1995 ) class III

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Frequency sweep
-Radiated amplitude-modulated 10V/m(rms), f=80…1000MHz
Spot frequency
-Radiated amplitude-modulated 10Vm(rms), f=80MHz/160MHz
/450MHz/900MHz
- Radiated pulse-modulated 10Vm(rms), f=900MHz
Fast transient disturbance tests IEC60255-22-4:2002
(idt IEC 61000-4-4)
- Power supply, I/O & Earth terminals Class IV, 4kV, 2.5kHz, 5/50ns
- Communication terminals Class IV, 2kV, 5.0kHz, 5/50ns
Surge immunity tests IEC60255-22-5:2002
(idt IEC 61000-4-5:1995) , Class III
- Power supply, AC inputs, I/O terminals 1.2/50us,
2kV, line to earth;
1kV, line to line
Conducted RF electromagnetic disturbance IEC60255-22-6, Class III
- Power supply, AC, I/O, Comm. terminal 10V(rms), 150kHz~80MHz
IEC61000-4-8:1993, Class V
Power frequency magnetic field immunity 100A/m for 1min
1000A/m for 3s
IEC61000-4-9:1993, Class V
Pulse magnetic field immunity 6.4/16 us
1000A/m for 3s
IEC61000-4-10:1993, Class V
Damped oscillatory magnetic field immunity
100kHz & 1MHz – 100A/m

2.2 Certification

 ISO9001: 2000

 ISO14001:2004

 OHSAS18001: 1999

 ISO10012:2003

 CMMI L3

 EMC: 89/336/EEC, EN50263: 2000

 Products safety(PS): 73/23/EEC, EN61010-1: 2001, EN60950: 2002

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 Chapter 3 Operation Theory

Chapter 3 Operation Theory

3.1 Operation Theory

Following figure shows the operation theory structure of the FOX-41A. It contains a local
protection input circuit, a teleprotection output circuit, a HMI module, a serial communication
controller, a code conversion module and an optoelectric conversion module. The FOX-41A also
provides a RS-232 serial port for the configuration tool and a printer port.

1 PC
Local Protection Input

2 (Configuration
HMI Tool)
3 Binary
4
Input
5
6 Circuit
7 Printer
8

CPU

Optical Fiber
Channel
1
Teleprotection Output

2
3 Binary
4
Output
5 SCC
6 Circuit (Serial Optoelectric
Encode/Decode
7 Communication Conversion
Controller)
8

Figure 3.1-1 Operation theory structure of the FOX-41A

The local protection inputs can be transmitted to opposite terminal by the FOX-41A, and the
teleprotection signals which are received from opposite terminal can be sent to the local protection
by the FOX-41A.

The FOX-41A can detect the local protection input continuously, and send the status of the local
protection input to the SCC (serial communication controller) though the CPU module. After being
coded as a corresponding data stream and converted as optical signal through the optoelectric
conversion, the local protection input information can be transmitted to opposite terminal through
an optical fiber transmission channel.

At the same time, the received data stream form the optical fiber reception channel can be sent to
the CPU module through the SCC (serial communication controller), when it is converted as
electrical signal through the optoelectric conversion and decoded. Then the CPU module sends
the corresponding binary signal to the binary output circuit for the local protection according to the
received information.

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Chapter 3 Operation Theory

3.2 Communication Interface

The FOX-41A adopts the optical fiber synchronization communication mode, and the transmission
rate is 64kbit/s or 2048kbit/s. The transmission rate can be configured as 64kbit/s or 2048kbit/s
according to the demand of the practical engineering application. A relevant setting [Opt_DataRate]
is used to select the transmission rate. When the setting [Opt_DataRate] is set as “1”, the
transmission rate is 2048kbit/s; otherwise, the transmission rate is 64kbit/s.

Two independent time clocks are applied in the reception and transmission procedures of the
FOX-41A; they are reception time clock and transmission clock. The reception clock of the
FOX-41A is gotten from the received data stream. It can ensure that there aren’t any error codes
and sliding codes.

There are two modes of the transmission clock; one is the inner crystal oscillator clock and another
is using the reception clock as the transmission clock. The mode which uses the inner crystal
oscillator clock as the transmission clock is called as inner clock (master clock) mode; and the
mode which uses the reception clock as the transmission clock is called as external clock (slaver
clock) mode.

There operation modes of the FOX-41A at the two terminals.

1. The external clock mode is adopted in the FOX-41A respectively at each terminal.

2. The inner clock mode is adopted in the FOX-41A respectively at each terminal.

3. The external clock mode is adopted in the FOX-41A at one terminal, and the inner clock mode
is adopted in the FOX-41A at another terminal. Such an operation mode makes the setting
configuration more complex, so the mode isn’t recommended to be adopted.

A relevant setting [En_InnClock] is used to select the clock mode. When the setting [En_InnClock]
is set as “1”, the inner crystal oscillator clock is used as the transmission clock; otherwise, the
external clock mode is adopted in the FOX-41A.

If the transmission rate is set as 64kbit/s, the setting [En_InnClock] is configured according to the
following two rules.

1. If the communication media is a special optical fiber channel, the setting [En_InnClock] is set
as “1” respectively at each terminal.

2. If the communication media is a duplication channel of the PCM equipment, the setting
[En_InnClock] is set as “0” respectively at each terminal.

If the transmission rate is set as 64kbit/s, the setting [En_InnClock] is configured according to the
other following two rules.

1. If the communication media is a special optical fiber channel, the setting [En_InnClock] is set
as “1” respectively at each terminal.

2. If the communication media is a duplication channel, the setting [ En_InnClock] is set in

accordance with the following rules.

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 Chapter 3 Operation Theory

[1] When the command information is sent to the 2048kbit/s board of the SDH equipment
through a coaxial cable directly, and the retiming function of the 2048kbit/s channel of the
SDH equipment is in service at the same time, the setting [En_InnClock] is set as “1”
respectively at each terminal. This operation mode is recommended.

[2] When the command information is sent to the 2048kbit/s board of the SDH equipment
through a coaxial cable directly, and the retiming function of the 2048kbit/s channel of the
SDH equipment is out of service at the same time, the setting [En_InnClock] is set as “0”
respectively at each terminal.

[3] When the command information is sent to the 2048kbit/s board of the SDH equipment
through a channel switch equipment, the setting [En_InnClock] is set according to the
practical demand respectively at each terminal.

Following figures show the communication connection modes of the FOX-41A.

Tx Rx

Optical Fiber
FOX-41A FOX-41A

Rx 64 or 2048Kb/s Tx

Figure 3.2-1 Dedicated optical fiber channel connection mode

Tx Rx Duplication
Equipment

MUX-64
Optical Fiber
FOX-41A Or SDH
MUX-2M

Rx 64 or 2048Kb/s Tx
Protection Panel Communication Panel

Figure 3.2-2 Communication equipment duplication connection mode

In some special application, the data stream is transmitted in single direction; that is the FOX-41A
at one terminal is only used to transmit data and the FOX-41A at another terminal is only used to
receive data. The demonstration of the special application is shown as below, and the channel is
dedicated optical fiber channel.

Tx Rx

Optical Fiber
FOX-41A FOX-41A

Rx 64 or 2048Kb/s Tx

Figure 3.2-3 Single direction communication connection mode

In such a situation, the relevant settings are configured as following table.

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Chapter 3 Operation Theory

Which Terminal En_OnlyRecv En_OnlySend

Only receiving terminal 1 0
Only transmitting terminal 0 1

If the data stream is transmitted in dual directions, the two settings [En_OnlyRecv] and
[En_OnlySend] must be set as “0” together.

3.3 Pilot Identification Code

To prevent the digital signal crosstalk and ensure the received data is from opposite terminal when
the FOX-41A interchanges the teleprotection signals through digital communication network, the
pilot identification code check mechanism is applied in the data interchange procedure.

Two relevant settings are used to configure the pilot identification codes ; they are [ID_Local] and
[ID_Remote]. The setting [ID_Local] is the pilot identification code of the local FOX-41A, and the
setting [ID_Remote] is the pilot identification code of the remote FOX-41A.

Each FOX-41A has a unique pilot identification code in the digital communication network, and
each FOX-41A must be configured the two settings [ID_Local] and [ID_Remote]. The data frame
which is transmitted to opposite terminal contains the pilot identification code of the local FOX-41A;
and the data frame which is received from opposite terminal also contains the pilot identification
code of the remote FOX-41A.

The pilot identification code check mechanism can identify whether the data from other terminal is
valid to the local terminal by comparing the setting [ID_Remote] and the pilot identification code
which is gotten from the received data. If they are equal each other, it means that the received
data is valid; otherwise the received data is invalid and to be discarded, and a relevant alarm
signal [Alm_ID_Ch] will be issued with a delay.

In the commissioning situation, if the transmission port and reception port are connected together
though an optical fiber, and the setting [ID_Remote] is set the same as the setting [ ID_Local], it is
easy to realize the pilot identification code check and data validity check.

3.4 Reception Signal Delay and Extension

The FOX-41A can transmit the teleprotection signals (tripping signals etc.), and these kinds of
signals need high reliability, but they aren’t strict to the transmission speed performance. So the
FOX-41A can get the teleprotection signals from the valid received data and then output the
teleprotection signals with an appointed time delay.

The first four received signals (No.1 ~ No.4 received signal) are regular received signals, and they
are sent to the output contacts without any processing (delay and extension). The other four
received signals (No.5 ~ No.8 received signal) can be sent to the output contacts with a delay or
extension processing. The settings [t_Dly_Outx] and [t_Ext_Outx] (x: 5 ~ 8) is used to configured
the output delay time and extension time of the configurable received signal (one of the No.5 ~
No.8 received signal) respectively. If the two settings are set as “0”, the corresponding received

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 Chapter 3 Operation Theory

signal can be used as a regular received signal.

Following figure shows the demonstration of the processing procedure of the received signals.

Received Signal x Received Signal Output x

Regular received signal processing (x: 1 ~ 4)

[t_Dly_Outx] [t_Ext_Outx]
Received Signal x Received Signal Output x

Configurable received signal processing (x: 5 ~ 8)

Figure 3.4-1 Demonstration of the processing procedure of the received signals

3.5 Supervision, Alarm and Blocking

The FOX-41A interface unit has entire supervision function which can monitor the operation
situation of the FOX-41A. If an abnormal situation is happened in the FOX-41A or the external
circuit of the FOX-41A is abnormal, the FOX-41A will issue a relevant alarm signal and the alarm
LED indicator “ALARM ” is lit.

3.5.1 Channel Abnormality Detection

In the data reception procedure, if the FOX-41A can’t receive any message or the received
message can’t pass any of the checks (frame format check, CRC check or received data check),
the received message will be discarded.

If the FOX-41A can’t receive any message or it receives an error frame several times in a period of
time, it will clear up the reception buffer and issue the alarm signal [ Alm_FramDly] 100ms later,
and the alarm LED indicator “ALARM” is lit.

When the FOX-41A can receive messages correctly, the FOX-41A will analyze the pilot
identification code of the received message. If the pilot identification code of the received message
is equal to the setting [ID_Local], the FOX-41A thinks that the received message is valid;
otherwise, the FOX-41A thinks that the message isn’t from the FOX-41A at opposite terminal and it
is a abnormal message, and then the FOX-41A will discard this message and issue the alarm
signal [Alm_ID_Ch] one second later, and the alarm LED indicator “ALARM” is lit.

3.5.2 Transmitted and Received Signal Abnormality Detection

When the FOX-41A works normally, it’s impossible that the transmitted or received signal is
keeping as “1” always. Because of the wrong wiring of the secondary circuit, the transmitted signal
which is led into the FXO-41A through the optoelectric coupler is keeping as “1” always. If any one
of the transmitted signal (the No.1 ~ No.8 transmitted signal) is keeping as “1” for longer than 20s,
the alarm signal [Alm_PersistBI] will be issued and the alarm LED indicator “ALARM” is lit.

Accordingly, if the transmitted signal of the FOX-41A at opposite terminal is keeping as “1” always,
the FOX-41A at this terminal can receive such a signal always. If any one of the received signal
(the No.1 ~ No.8 received signal) is keeping as “1” for longer than 20s, the alarm signal
[Alm_PersistBO] will be issued and the alarm LED indicator “ALARM ” is lit.

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Chapter 3 Operation Theory

3.5.3 Equipment Abnormality Self Detection

The FOX-41A can supervise itself continually when the equipment is in service. If any one of inner
failures (RAM failure, ROM failure, setting failure) is happened, and the DC power supply or the
output circuit is abnormal, this equipment is blocked.

If the power supply (+24V) of the optoelectric coupler is abnormal, the FOX-41A will issue the
alarm signal [Alm_Pwr_Opto] one second later and the alarm LED indicator “ALARM ” is lit. If the
power supply (+24V) of the optoelectric coupler returns to normal situation, the alarm signal
[Alm_Pwr_Opto] will be restored 10s later.

3.5.4 Processing of the Alarm and Blocking

When any one of inner failures (RAM failure, ROM failure, setting failure) is happened, and the DC
power supply or the output circuit is abnormal, the operation LED indicator “HEALTHY” is
extinguished, and the equipment failure blocking contact (BSJ) is closed. The equipment failure
blocking contact (BSJ) is a normal close contact.

When other alarm situation (such as channel abnormality, transmitted or received signal
abnormality, power supply failure of the optoelectric coupler etc.) is happened, the equipment will
issue a corresponding alarm signal, the alarm LED indicator “ALARM ” is lit and the abnormal
equipment alarm contact is closed. The abnormal equipment alarm contact (BJJ) is a normal open
contact.

All the alarm signals and their relevant descriptions, and the corresponding action of the “BSJ” and
“BJJ” contacts are listed in following table.

Alarm signal Description BSJ BJJ

Alm_RAM The RAM failure occurs. On On
Alm_ROM The ROM failure occurs. On On
Alm_EEPROM The setting failure occurs. On On
Alm_TrpOut The output circuit is abnormal. On On
Alm_Pwr_DC The power supply is abnormal. On On
Alm_InvalidGrp The setting group is invalid. On On
Alm_FramDly The reception is interrupted. Off On
Alm_ID_Ch The pilot identification code is wrong. Off On
Alm_PersistBI The transmitted signal is abnormal. Off On
Alm_PersistBO The received signal is abnormal. Off On
The power supply (+24V) of the optoelectric
Alm_Pwr_Opto Off On
coupler is abnormal.

3.6 Communication Channel Status

Whether the teleprotection signals can be transmitted to opposite terminal reliably and timely, that
is determined by the status of the communication channel. In the submenu “COMM CH” of the
FOX-41A, there are several statistics data are used to show the status of the communication
channel. The details about these statistics data are listed in following table.

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 Chapter 3 Operation Theory

Statistics Item Description

This item shows the pilot identification code of the received data from the
ID_Remote FOX-41A at opposite terminal. If the alarm signal [Alm_FramDly] is issued,
the status of the “ID_ Remote” will show as “-----”.
This item shows the device type at opposite terminal. For example, the
Type_Remote number “5” means that the device at opposite terminal is a FOX-41A. If the
alarm signal [Alm_FramDly] is issued, the “Type_Remote” will show as “-”.
t_ChDly This item shows the time delay of the communication channel.
From This item shows the time when the channel state is in statistics.
This item shows the invalid data frame number. If the FOX-41A receives a
N_CrcFail data frame which can’t pass the CRC check, this item will add “1”
automatically.
If the FOX-41A can’t receive a data frame in an appointed period, this item
N_FramDly
will add “1” automatically.
If the FOX-41A receives an invalid data frame due to the abnormal status
N_FramErr
of the communication channel, this item will add “1” automatically.
If the FOX-41A at opposite terminal can’t receive a correct data frame, this
N_RecAbnor
item will add “1” automatically.

If the communication channel is healthy and all the connectors are con nected tightly, the FOX-41A
at the two terminals can communicate successfully and the items “N_CrcFail”, “N_FramDly”,
“N_FramErr” and “N_RecAbnor” will be keeping unchanged in a period of time.

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Chapter 3 Operation Theory

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 Chapter 4 Hardware Description

Chapter 4 Hardware Description

4.1 Overview

The modular design of the FOX-41A allows this device to be easily upgraded or repaired by a
qualified service person. The faceplate is hinged to allow easy access to the configurable modules,
and back-plugging structure design makes it easy to repair or replace any mo dules.

There are several types of hardware boards in the FOX-41A; each module takes a different part in
this interface. The FOX-41A mainly consists of DC module (power supply module), CPU module,
EO module (optoelectric conversion module), COM module, OPT1 module, SIG module, OUT
module, OUT1 module, OUT2 module and HMI module. The OUT1 module and OUT module are
optional. Following figure shows the block diagram of the FOX-41A.

LCD LED Keypad

HMI Module

Inner Bus OUT1 Module

OUT2 Module
OPT1 Module
COM Module

CPU Module

OUT Module
SIG Module
DC Module

EO Module

Figure 4.1-1 Hardware block diagram

NOTE: The OUT2 module, OUT module and COM module are optional according to

practical engineering application. The hardware configuration of the FOX-41A must be

definitely declared in the technical scheme and the contract.

Following two figures show the front panel and the rear panel of the FOX-41A.

HEALTHY ALARM

OUT1 IN1

OUT2 IN2

FOX－41A
P

OUT3 IN3
GR

Interface Unit OUT4 IN4

OUT5 IN5 ENT

ESC

OUT6 IN6

OUT7 IN7

OUT8 IN8

NARI-RELAYS ELECTRIC CO.,LTD

TARGET RESET

Figure 4.1-2 Front panel of the FOX-41A

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Chapter 4 Hardware Description

DC EO COM CPU OPT1 SIG OUT1 OUT2 OUT

ON
RX

OFF

NARI-RELAYS

NARI-RELAYS

NARI-RELAYS

NARI-RELAYS

NARI-RELAYS
TX

XH04H30T

XH04H30T

XH04H30T

XH04H30T

XH04H30T
20070921

20070921

20070921

20070921

20070921
Figure 4.1-3 Rear panel of the FOX-41A (fully equipped)

4.2 Basic Enclosure

The basic enclosure for the FOX-41A is an electronic equipment rack with an adequate number of
slots for the modules of the FOX-41A. The basic rack is equipped with a back plane (mother
board). The back plane provides some back plane lines for distributing signals within the
enclosure.

There are 14 slots in the rack of FOX-41A, which can be populated with the modules of the
FOX-41A: DC module, CPU module, EO module, OPT1 module, SIG module, OUT1 module,
OUT2 module and OUT module. Typical allocation of these slots is shown in Figure 4.2-1.

Slot: 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUT2 Module (Optional)
COM Module (Optional)

OUT Module (Optional)

OUT1 Module
Vacant Board

Vacant Board

Vacant Board

Vacant Board

Vacant Board
OPT1 Module
CPU Module

SIG Module
DC Module

EO Module

Figure 4.2-1 Allocation of the slots in the FOX-41A (rear view)

4.3 DC Module

The power supply module is a DC/DC converter with electrical insulation between input and output,
and a mean output power of 30W. The power supply module has an input voltage range as
described in Chapter 2 “Technical Data”. The standardized output voltages are +5Vdc, ±12Vdc
and +24Vdc for other modules. The tolerances of the output voltages are continuously monitored.

The input of the power supply module is protected by a 3.15A / 250 V slow fuse. The current surge
when energizing the power supply module is limited to 3.15A. The use of an external miniature
circuit breaker is recommended. The circuit breaker must be in the on position when the device is
in operation and in the off position when the device is in cold reserve.

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 Chapter 4 Hardware Description

Following figure shows the front view and functional demonstration of the DC module.

DC
101 +5V
ON To other
DC/DC ±12V modules of
OFF this device
102 +24V
Filter
104
OPT 24V
105
To OPT1
module
106

Grounded
Copper Strip

Figure 4.3-1 Front view and functional demonstration of the DC module

A 6-Pin connector is fixed on the front of the DC board. The terminal definition of the connector is
described as below.

Pin No. Signal Description

101 PWR+ Positive pole of the DC power supply
102 PWR- Negative pole of the DC power supply
103 NC Not connected
104 OPT+ Positive pole of the power supply output for OPT1 module
105 OPT- Negative pole of the power supply output for OPT1 module
106 GND Ground connection

The following figure shows the typical wiring of the DC module and the OPT1 module.

OPT 24V ＋
104
OPT 24V － 105 DC

BI COM 615
FOX-41A

614

OPT1

External binary input (dry contact)

Figure 4.3-2 Typical wiring of the DC module and the OPT1 module

4.4 EO Module

The EO module can encode the transmitted signals and decode the received signals, and it can
interchange these signals through the optical fiber channel.

The EO module can convert the electrical signals to optical signals and vice versa. It provides two
optical fiber interfaces for connecting the interface unit to the optical communication equipment.
The synchronization communication rate is 64kbit/s or 2048kbit/s.

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Chapter 4 Hardware Description

Following figure shows the front view of the EO module.

EO

RX

TX

Figure 4.4-1 Front view of the EO module

4.5 CPU Module

The CPU module is the kernel part of this equipment, and contains a powerful microchip processor,
a special communication controller (SCC) and some necessary electronic elements.

This powerful processor performs all of the functions for the interface unit: the binary input and
output function, the signal synchronization communication function, the human-machine interface
(HMI) function, the SCADA communication function and self supervision functio n.

A high-accuracy clock chip is contained in this module, it provide accurate current time for the
FOX-41A.

Following figure shows the front view of the CPU module.

CPU

Figure 4.5-1 Front view of the CPU module

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 Chapter 4 Hardware Description

4.6 HMI Module

The HMI module is installed on the front panel of FOX-41A. It is used to observe the running status
and event information on the LCD, and configure the settings. A 1 28×64-dot matrix backlight LCD,
a 9-key keypad, a target resetting button, a RS-232 commissioning port and 18 LED indicators are
contained in this module. All these can help the user to know the status of the equipment and
detailed event information easily, and provide convenient and friendly access interface for the user.
For further details, see Chapter 5 “HMI Operation Introduction”.

The elements and their functions of the HMI module are listed as follow.

 A 128×64-dot matrix backlight LCD: the LCD is used for monitoring status, fault diagnostics
and setting configuration etc.

 18 LED indicators: these LED indicators are used to denote the status of this interface unit.

 A 9-key keypad: the keypad is used for full access to the device.

 A commissioning RS-232 port: it is a decided RS-232 port for the communication between the
FOX-41A and the special RCSPC software.

 A target resetting button: this button is used to restore the signals on the LCD and LED
indicators and the latched output contacts.

1 2

HEALTHY ALARM

OUT1 IN1

OUT2 IN2

FOX－41A
P

OUT3 IN3
GR

Interface Unit OUT4 IN4

OUT5 IN5 ENT

ESC

OUT6 IN6

OUT7 IN7

OUT8 IN8

NARI-RELAYS ELECTRIC CO.,LTD

TARGET RESET

5 4 3

Figure 4.6-1 Human-machine interface module of FOX-41A

Indication No. Description

1 LCD
2 LED indicators
3 Keypad
4 Commissioning port
5 Resetting button

4.7 COM Module

The FOX-41A can communicate with the RTU or SCADA system through the COM module. It also

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Chapter 4 Hardware Description

provides a port for connecting to the printer and a RS-485 port for GPS signal. Four types of COM
module are available. Following figures shows the front views of the four types of COM module.

COM

1 RS-485 1A
To SCADA
2 RS-485 1B
3 RS-485 1GND PORT 1 PORT 2 PORT 3 PORT 4
4 RS-485 2A
To SCADA
5 RS-485 2B
6 RS-485 2GND RS-485 RS-485 RS-485 RS-485/RS-232
7 RS-485 A
To GPS Unit
8 RS-485 B
Twisted pair wire Twisted pair wire Twisted pair wire Twisted pair wire
9 RS-485 GND
10 Printer RX To printer or
11 Printer TX printing controller
12 Printer Ground

Figure 4.7-1 Front view of the type A COM module

Op.Fib.RX1
COM Optic Fibre
To SCADA
Op.Fib.TX1
RX

Op.Fib.RX2
PORT 1 PORT 2 PORT 3 PORT 4
TX Optic Fibre
To SCADA
RX Op.Fib.TX2
RS-485 RS-485 RS-485 RS-485/RS-232

TX

Optic fiber Optic fiber Twisted pair wire Twisted pair wire

1 RS-485 A
To GPS Unit
2 RS-485 B
3 RS-485 GND
4 Printer RX To printer or
5 Printer TX printing controller
6 Printer Ground

Figure 4.7-2 Front view of the type B COM module

Ethernet 1
COM To SCADA
10/100 TX
Ethernet 2
To SCADA
10/100 TX
Ethernet 3
To SCADA
10/100 TX PORT 1, PORT 2
PORT 5 PORT 6 PORT 7
Ethernet 4
To SCADA PORT 3, PORT 4
10/100 TX

RS-485/
Ethernet RS-485 RS-485
RS-232
1 RS-485A
To SCADA
2 RS-485B Twisted pair Twisted pair Twisted pair
Twisted pair wire
3 RS-485GND wire wire wire
4 RS-485A
To GPS Unit
5 RS-485B
6 RS-485GND
7 Printer RX To printer or
8 Printer TX printing controller
9 Printer Ground

Figure 4.7-3 Front view of the type E COM module

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 Chapter 4 Hardware Description

COM Ethernet 1
10/100 TX
To SCADA
Ethernet 2
10/100 TX
To SCADA
PORT 1, PORT 2 PORT 3, PORT 4 PORT 5

Op.Fib.RX3 Optic Fibre Ethernet Ethernet RS-485/RS-232

To SCADA
Op.Fib.TX3

Op.Fib.RX4 Optic Fibre Twisted pair wire Optic fiber Twisted pair wire
To SCADA
Op.Fib.TX4

1 Printer RX To printer or
2 Printer TX printing controller
3 Printer Ground

Figure 4.7-4 Front view of the type G COM module

All ports used to communicate with SAS support IEC60870-5-103 protocol; moreover, Ethernet
port in COM modules also supports IEC61850.

The synchronization clock port is used to synchronize the inner clock of the FOX-41A. There are
three options to realize time synchronization:

1. Receiving PPS (pulse per second) and PPM (pulse per minute) via external contact

2. Receiving IRIG-B signal via RS-485

3. Receiving time synchronization message from substation automatic system

The printer port could be configured as RS-232 or RS-485 by setting corresponding jumpers on
the COM module (RS-232 default). If logic setting [En_Net_Print] is set to “1”, printer port must be
set as RS-485. Transmission rate of printer port can be set by the setting [Printer_Baud] and
should be the same with baud rate of the printer.

NOTE: The printer port can be configured as RS-485 or RS-232 by setting the jumper on

the COM module. The port is configured as RS-232 by shorting pin-1 and pin-2 and as
RS-485 by shorting pin-2 and pin-3.

Pin-1 Pin-2 Pin-3

RS-485 RS-232

Figure 4.7-5 Jumper configuration for the printer port

4.8 OPT1 Module

The OPT1 module is an optoelectric conversion module; it is used to convert the electrical binary
input to optical binary input. The terminal definition of the OPT1 module is listed in following table.

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Chapter 4 Hardware Description

Terminal No. Sign Description

601 BI_Pulse_GPS Binary input of the synchronization clock signal
602 BI_Print Binary input of the printing signal
603 BI_BlkComm Binary input of the device maintenance signal
604 BI_RstTarg Binary input of the target resetting signal
605 BI_In1 No.1 transmitted teleprotection signal binary input
606 BI_In2 No.2 transmitted teleprotection signal binary input
607 BI_In3 No.3 transmitted teleprotection signal binary input
608 BI_In4 No.4 transmitted teleprotection signal binary input
609 BI_In5 No.5 transmitted teleprotection signal binary input
610 BI_In6 No.6 transmitted teleprotection signal binary input
611 BI_In7 No.7 transmitted teleprotection signal binary input
612 BI_In8 No.8 transmitted teleprotection signal binary input
613 BI_13 Blank
614 PWR24V+ OPT 24V power supply input (+)
615 PWR24V- OPT 24V power supply input (-)
616 BI_16 Blank
617 ~ 625 BI_17 ~ BI_25 Reserved binary inputs
626 ~ 630 BI_26 ~ BI_30 Blank

The binary input [BI_Pulse_GPS] is used to receive clock synchronism signal from GPS unit or
other clock synchronization equipment, it will change from “0” to “1” once per second or per minute
depended on the setting [GPS_Pulse]. When setting [GPS_Pulse] is set to “1”, the equipment
receives PPM (pulse per minute); otherwise, it receives PPS (pulse per second). Clock
synchronization via RS-485 bus (on COM module) is recommended. Only one of them can be
applied at the same time.

The binary input [BI_Print] is used to manually to trigger printing latest report when the equipment
is configured as manual printing mode ([En_Auto_Print]=0). The printer button is located on the
panel usually. If the equipment is configured as automatic printing mode ([En_Auto_Print]=1), the
report will be printed automatically as soon as it is formed.

The binary input [BI_BlkComm] is used to block monitoring direction communication when the
protective device is maintained. A link located on the panel is used for that. When the equipment is
in maintenance or commissioning status, this link should be closed. All of the reports will not be
sent via communication port then, but local displaying and printing are still working. This link
should be open during normal operation condition.

The binary input [BI_RstTarg] is used to manually reset latching signal relay, LED indicators and
LCD displaying. The reset is done by pressing a button on the panel or by remote command via
communication channel.

The binary input [BI_IN1] to [BI_IN8] is used as local teleprotection signal input. The FOX-41A can
transmit the status of these binary inputs to opposite terminal continuously.

The +24 power supply from the DC module is led to the OPT1 module through the terminal 614
and 615. The terminal 615 is also the common negative terminal of the all binary inputs.

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 Chapter 4 Hardware Description

Following figure shows the wiring and front view of the OPT1 module.

104 OPT＋
DC
OPT1 105 OPT－

615 PWR24－
601
602 614
603 PWR24＋
604
605
606 601 BI_Pulse_GPS
607
608
609 602 BI_Print
610
611
612 603 BI_BlkComm
613
614
615 604 BI_RstTarg
616
617
618 605 BI_In1
619
620
621 OPT1
622 606 BI_In2
623
624
625 607 BI_In3
626
627
628 608 BI_In4
629
630
609 BI_In5
610 BI_In6
611 BI_In7
612 BI_In8

Figure 4.8-1 Wring and front view of the OPT1 module

4.9 SIG Module

The SIG module is a signal output module. It provides eight dry-contact binary outputs for the
supervision system.

Following figure shows the inner structure and front view of the SIG module.

SIG BSJ-1
802 806
801 BJJ-1
802 812
803
804
806
805 FXX
807 810
808
809
810 SXX
811
812
813
808
814
815
816
817 BSJ-2
818
819
820 828 820
821
822
823
824 BJJ-2
825
826
827
818
828
829 FXJ
830
822
SXJ
824

Figure 4.9-1 Inner structure and front view of the SIG module

The “BSJ” is an equipment failure alarm relay. Its contacts will close if DC power supply of the
equipment is lost or internal fault occurs. The binary output “BSJ-1” and “BSJ-2” are normal close
contacts.

The “BJJ” is an abnormality alarm relay. Its contacts will close and warning signal will be sent
when the equipment is in abnormal situation, such as power supply failure, RAM failure, ROM

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Chapter 4 Hardware Description

failure and output circuit failure etc. The binary output “BJJ-1” and “BJJ-2” are normal open
contacts.

The “FXX” and “FXJ” are signal transmission indication relays. When any one of the transmitted
signals is “1”, their contacts will close. The contact of the “FXX” is latched, and can be restored by
pressing the target resetting button or a communication resetting command. The binary output
“FXX” and “FXJ” are normal open contacts.

The “SXX” and “SXJ” are signal reception indication relays. When any one of the received signals
is “1”, their contacts will close. The contact of the “SXX” is latched, and can be restored by
pressing the target resetting button or a communication resetting command. The binary output
“SXX” and “SXJ” are normal open contacts.

4.10 OUT1 Module

The OUT1 module provides binary outputs for the reception abnormality output and received
signal output (No.1 ~ No.4 received signal).

OUT1 UB1-1 OUT1X-1

901 902 925 926
OUT1X-2
UB1-2 927 928
901 903 904
902
903
904
905
906
907
OUT2X-1
908 921 922
909
910 OUT2X-2
911
912
913
923 924
914
915
916
917
918
919 OUT1
920 905 906 OUT3X-1
922
921 917 918
923
924
925 OUT2 OUT3X-2
926 907 908 919 920
927
928
929
930
OUT3
909 910 OUT4X-1
913 914
OUT4 OUT4X-2
911 912 915 916

Figure 4.10-1 Inner structure and front view of the OUT1 module

Terminal 901 ~ 904 are used as the reception abnormality outputs. If the FOX-41A detects that the
synchronization communication reception is abnormal, the contacts “UB1-1” and “UB1-2” will
close.

Terminal 905 ~ 912 are used as the quick received signal o utputs for the No.1 ~ No.4 received
signals respectively. Each received signal has only quick output.

Terminal 913 ~ 928 are used as the received signal outputs for the No.1 ~ No.4 received signals
respectively. Each received signal has two outputs.

The quick received signal output is faster than the received signal output, but its breaking capacity
is less than the received signal output.

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4.11 OUT2 Module

The OUT2 module provides binary outputs for the received signal output (No.5 ~ No.8 received
signal). This module is optional according to the practical engineering application.

OUT2 OUT5X-1
A01 A02 A25 A26
OUT5X-2
A27 A28
A01 A03 A04
A02
A03
A04
A05
A06
A07
OUT6X-1
A08 A21 A22
A09
A10 OUT6X-2
A11
A12
A13
A23 A24
A14
A15
A16
A17
A18
A19 OUT5
A20 A05 A06 OUT7X-1
A22
A21 A17 A18
A23
A24
A25 OUT6 OUT7X-2
A26 A07 A08 A19 A20
A27
A28
A29
A30
OUT7
A09 A10 OUT8X-1
A13 A14
OUT8 OUT8X-2
A11 A12 A15 A16

Figure 4.11-1 Inner structure and front view of the OUT2 module

Terminal A05 ~ A12 are used as the quick received signal outputs for the No.5 ~ No.8 received
signals respectively. Each received signal has only quick output.

Terminal A13 ~ A28 are used as the received signal outputs for the No.5 ~ No.8 received signals
respectively. Each received signal has two outputs.

The quick received signal output is faster than the received signal output, but its breaking capacity
is less than the received signal output.

NOTE: The OUT2 module is optional according to the practical engineering application.

This module isn’t included in the standard hardware configuration. If it is needed, it must
be definitely declared in the technical scheme and the contract.

4.12 OUT Module

The OUT module provides binary outputs (normal close contacts) for the reception abnormality
output. This module is optional according to the practical engineering application.

Terminal A01 ~ A08 are used as the reception abnormality outputs respectively. If the FOX-41A
detects that the synchronization communication reception is abnormal, the contacts “UB1-3” to
“UB1-6” will close.

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UB1-3
OUT B01 B02

UB1-4
B01 B03 B04
B02
B03
B04
B06
B05 UB1-5
B08
B07 B05 B06
B09
B10
B11 UB1-6
B12
B14
B13 B07 B08
B15
B16
B17
B18
B20
B19 B09 B10
B21
B22
B23
B24
B25 B11 B12
B26
B27
B28
B29
B30
B13 B14

B15 B16

Figure 4.12-1 Inner structure and front view of the OUT module

NOTE: The OUT module is optional according to the practical engineering application.

This module isn’t included in the standard hardware configuration. If it is needed, it must
be definitely declared in the technical scheme and the contract.

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Chapter 5 HMI Operation Introduction

Human machine interface (HMI) is an important component of the equipment. It is a convenient
facility to access the device from the front local control panel of the device to view desired
information (such as binary input status, binary output status or program version etc.), or modify
the settings of the device. This function is very helpful during commissioning before putting the
equipment into service.

Furthermore, all above functions can be realized with special RCSPC software through the
commissioning RS-232 port on the front panel of this device.

This chapter will describe human machine interface (HMI), menu tree and LCD display of the
equipment. In addition, how to input settings using keypad is described in detail.

5.1 Human Machine Interface Overview

5.1.1 Design

The human-machine interface (HMI) allows a communication as simple as possible for the user.
See Section 4.6 “HMI module” for the details of the HMI module.

5.1.2 Functionality
 The HMI module helps to draw your attention to something that has occurred which may
activate a LED or a report display on the LCD.

 You as the operator may have own interest to view a certain data.

 Use menus navigate through menu commands and to locate the data of interest.

5.1.3 Keypad and Keys

The keypad and keys on the front panel of the equipment provide convenience to the operator to
view a certain data or change the device’s setting.

The keypad contains nine keys, and each key has different function to the other one. Following
figure shows the keypad and keys.
P
GR

ENT
ESC

Figure 5.1-1 Keypad mounted on the front panel

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No. Key Function

1 “▲” and “▼” Move cursor left-fight among selectable target
2 “◄” and “►” Move cursor up-down among selectable target
3 “+” and “-” Add or subtract in the digit
4 ENT Provide enter/execute function
5 GRP Setting group selection as active group
5 ESC Exit the present menu or return to the upper level menu

NOTE: Any setting change operation should end with simply pressing “+”, “◄”, “▲”, and

“-” in sequence, as a password. Without the operation, modifying settings is invalid.

NOTE: Report deleting operation should executed by pressing “+”, “-”, “+”, “-”, “ENT” in

sequence after exiting the main menu.

5.1.4 LED Indicators

There are eighteen LED indicators, which can indicate the operation state of the device. The LED
indicators on the front panel of the device are shown as below.

HEALTHY ALARM

OUT1 IN1

OUT2 IN2

OUT3 IN3

OUT4 IN4

OUT5 IN5

OUT6 IN6

OUT7 IN7

OUT8 IN8

Figure 5.1-2 LED indications of the FOX-41A

The “HEALTHY” LED indicates the operation status of the device. If any one of the serious faults
occurs in the FOX-41A, this indicator will be turned on as steady green.

The “ALARM ” LED indicates the operation status of the device. If any one of the alarm events
occurs, this indicator will be turned on as steady yellow. When alarm signals disappear, it will be
turned off.

The “OUTx” (x: 1~8) LED indicates the status of the corresponding output channel. If the FOX-41A
receives the “1” signal from opposite terminal, this device will output the “1” signal and turn on the
corresponding LED “OUTx”; otherwise, the corresponding LED “OUTx” is turned off.

The “INx” (x: 1~8) LED indicates the status of the corresponding input channel. If the FOX-41A
detects the input is “1”, this device will and transmits the signals to opposite terminal and turn on
the corresponding LED “INx”; otherwise, the corresponding LED “INx” is turned off.

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The alarm events and their relationships with the “HEALTHY” LED and “ALARM ” LED are listed in
following table when the device is in service.

Alarm signal Description HEALTHY ALARM

Alm_RAM The RAM failure occurs. Off On
Alm_ROM The ROM failure occurs. Off On
Alm_EEPROM The setting failure occurs. Off On
Alm_TrpOut The output circuit is abnormal. Off On
Alm_Pwr_DC The power supply is abnormal. Off On
Alm_InvalidGrp The setting group is invalid. Off On
Alm_FramDly The reception is interrupted. On On
Alm_ID_Ch The pilot identification code is wrong. On On
Alm_PersistBI The transmitted signal is abnormal. On On
Alm_PersistBO The received signal is abnormal. On On
The power supply (+24V) of the optoelectric
Alm_Pwr_Opto On On
coupler is abnormal.

5.1.5 Commissioning Port

The commissioning port is a DB9 RS-232 standardized serial port. It is used to communication with the
special RCSPC software to configure the settings and view the binary input status of the FOX-41A.

5.2 Understand the HMI Menu Tree

5.2.1 Overview

In this part, the main layout of the menu which is shown on the LCD of the local human-machine
interface (HMI) will be described in detail.

Press key “▲” to enter the main menu of the device, which is shown as bellow.

MENU
11:VALUES
2:REPORT
3:PRINT
Figure 5.2-1 Main menu interface

Press key “▲” or “▼” to move the cursor and locate the desired item and then press “ ENT” to
enter its submenu. Press key “ESC” or menu “EXIT” to quit the main menu.

There are up to 7 items in the main menu: “VALUES”, “REPORT”, “PRINT”, “SETTINGS”,
“CLOCK”, “VERSION” and “EXIT”.

The following figure shows the menu tree structure of this equipment.

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1:BI STATE MENU 1:ALM REPORT

2:COMM CH 2:BI CHG REPORT
0:EXIT 0:EXIT

1:SETTINGS 1:VALUES

2:ALM REPORT 2:REPORT 1:EQUIP SETTINGS

3:BI CHG REPORT 3:PRINT 2:PROT SETTINGS
4:PRESENT VALUES 4:SETTINGS 3:IP ADDRESS
5:VERSION 5:CLOCK 4:COPY SETTINGS
6:UNACT SETTINGS 6:VERSION 5:UNACT SETTINGS
0:EXIT 0:EXIT 0:EXIT

Figure 5.2-2 Menu tree diagram of total command menu

5.2.2 “VALUES” Menu

Purpose:

This menu is used to view the binary input state, virtual binary output state and the communication
channel state.

Access Approach:

Press key “▲” to enter the main menu, move cursor to the item “VALUES” and press key “ENT” to
enter its submenu.

Submenu Tree:

1:VALUES 1:BI STATE

2:COMM CH
0:EXIT

Figure 5.2-3 Tree diagram of “VALUES” menu

“VALUES” menu has following submenus.

No. Submenu Description

1 BI STATE To view the state of binary inputs and outputs.
2 COMM CH To view the communication channel state.
0 EXIT To exit current submenu and return to upper level menu.

5.2.3 “REPORT” Menu

Purpose:

This menu is used to view the alarm reports and binary input change reports.

Access Approach:

Press key “▲” to enter the main menu, move cursor to the item “REPORT” and press key “ENT” to
its submenu.

Submenu Tree:

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2:REPORT 1:ALM REPORT

2:BI CHG REPORT
0:EXIT

Figure 5.2-4 Tree diagram of “REPORT” menu

“REPORT” has following submenus.

No. Item Description

1 ALM REPORT To view the alarm report.
2 BI CHG REPORT To view the binary input change report.
0 EXIT To exit current submenu and return to upper level menu.

5.2.4 “PRINT” Menu

Purpose:

This menu is used to print the settings, report, present values and version of the interface unit.

Access Approach:

Press key “▲” to enter the main menu, move cursor to the item “PRINT” and press key “ENT” to
enter its submenu.

Submenu Tree:

3:PRINT 1:SETTINGS
2:ALM REPORT
3:BI CHG REPORT
4:PRESENT VALUES
5:VERSION
6:UNACT SETTINGS
0:EXIT

Figure 5.2-5 Tree diagram of “PRINT” menu

“PRINT” has following submenus.

No. Item Description

1 SETTINGS To print the current settings.
2 ALM REPORT To print the alarm reports.
3 BI CHG REPORT To print the binary input change reports.
4 PRESENT VALUES To print all present values of the equipment.
5 VERSION To print the software version of the equipment.
6 UNACT SETTINGS To print the settings in inactive group.
0 EXIT To exit current submenu and return to upper level menu.

5.2.5 “SETTINGS” Menu

Purpose:

The menu is used to view and modify the settings of the equipment.

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Access Approach:

Press key “▲” to enter the main menu, move cursor to the item “SETTINGS” and press key “ENT”
to enter its submenu.

Submenu Tree:

4:SETTINGS 1:EQUIP SETTINGS

2:PROT SETTINGS
3:IP ADDRESS
4:COPY SETTINGS
5:UNACT SETTINGS
0:EXIT

Figure 5.2-6 Tree diagram of “SETTINGS” menu

“SETTINGS” menu has following submenus.

No. Submenu Description

1 EQUIP SETTINS To view and modify equipment parameters.
2 PROT SETTINGS To view and modify channel settings in current group.
3 IP ADDRESS To view and modify the Ethernet IP address.
4 COPY SETTINGS To copy current group of settings to other group.
5 UNACT SETTINGS To view and modify channel settings in inactive group.
0 EXIT To exit current submenu and return to upper level menu.

5.2.6 “CLOCK” Menu

Purpose:

This menu is used to modify the clock of the equipment.

Access Approach:

Press key “▲” to enter the main menu, move cursor to the item “SITE SET” and press key “ENT”
to enter the clock modification interface.

5.2.7 “VERSION” Menu

Purpose:

This menu is used to view the program version of the equipment.

Access Approach:

Press key “▲” to enter the main menu, move cursor to the item “VERSION” and press key “ENT”
to enter.

5.2.8 “EXIT” Menu

Purpose:

This menu is used to exit the main menu and return to default display.

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Access Approach:

Press key “▲” to enter the main menu, select the item “EXIT” and press key “ENT” to return.

5.3 Understand the LCD Display

5.3.1 Default Display under Normal Condition

The LCD has default display after equipment is energized. If there is no keypad activity for about
1.5 minutes in main menu or any submenu, the LCD backlight will be turned off. The default
display on the LCD is shown as below.

1 06-22 10:49:20
2 FOX-41A
3 Interface Unit
4 Grp 01
Figure 5.3-1 Default display in normal situation

A brief explanation is made in the following table.

No. Display Explanation

It shows the current date and time of the device as the format
1 06-22 10:49:20
“mm-dd hh:mm:ss”.
2 FOX-41A It shows the device type.
3 Interface Unit It shows the device name.
4 Grp 01 It shows the active setting group number.

5.3.2 Display under Abnormal Condition

If there is any abnormality in the operation situation or the firmware error is detected by equipment
self-diagnostic, the alarm report will be displayed instantaneously on the LCD. Therefore, the
default display will be replaced by the alarm report. In case there is more than one alarm that has
occurred, the information will be displayed alternately on the L CD.

A sample of the alarm report shown on the LCD is demonstrated in following figure.

1 ALM000 08-06-22
2 11:18:38:356MS
3 Alm_FramDly

Figure 5.3-2 Information of Operating Alarm on the LCD

A brief explanation about above figure is made in the following table.

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No. Display Explanation

It shows the alarm title and date. The “000” is the alarm report
1 ALM000 08-06-22
sequence number. The date format is “yy-mm-dd”.
2 11:18:38:356MS It shows the alarm time. The format is “hh:mm:ss: millisecond”.
3 Alm_FramDly It shows the alarm signal name.

All the alarm elements and their description are listed in following table.

No. Alarm Symbol Description

1 Alm_RAM The RAM failure occurs.
2 Alm_ROM The ROM failure occurs.
3 Alm_EEPROM The setting failure occurs.
4 Alm_TrpOut The output circuit is abnormal.
5 Alm_Pwr_DC The power supply is abnormal.
6 Alm_InvalidGrp The setting group is invalid.
7 Alm_FramDly The reception is interrupted.
8 Alm_ID_Ch The pilot identification code is wrong.
9 Alm_PersistBI The transmitted signal is abnormal.
10 Alm_PersistBO The received signal is abnormal.
The DC power supply (+24V) of the optoelectric coupler is
11 Alm_Pwr_Opto
abnormal.

How the FOX-41A processes the alarm events is detailedly described in Section 3.5.4 “Processing
of the Alarm and Blocking” and Section 5.1.4 “LED Indicators”.

5.4 View the Settings

Here take viewing the channel settings as an example to introduce the operating steps of viewing
setting for operators.

Operating steps:

1. Press key “▲” to enter the main menu at first.

2. Press key “▲” or “▼” to select “SETTINGS” item by scrolling the cursor upward or downward,
and then press key “ENT” to enter the submenu.

3. Press key “▼”or “▼” to select “PROT SETTINGS” by scrolling the cursor upward or
downward, and then press key “ENT” to display the channel setting symbols and values.

1 Grp 01 Setting
2 ID_Local
3 012344
4 ID_Remote
Figure 5.4-1 Viewing the channel settings

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A brief explanation about above figure is made in the following table.

No. Display Explanation

It shows the current setting group number and the title of the
1 Grp 00 Setting
channel settings.
2 ID_Local It shows the setting name.
3 01234 It shows the setting value of above setting.
4 ID_Remote It shows the setting name.

If you want to view more setting parameters, please press key “▲” or “▼” to locate the setting you
are interested in by moving the cursor; or press key “ ESC” to return to upper level menu.

5.5 View the Values

5.5.1 View the Status of Binary Inputs

Operating steps:

1. Press key “▲” to enter the main menu at first.

2. Press key “▲” or “▼” to select “VALUES” item by scrolling the cursor upward or downward,
and then press key “ENT” to enter the submenu.

3. Press key “▲” or “▼” to select “BI STATE” item by scrolling the cursor upward or downward,
and then press key “ENT” to view the state of binary inputs.

1 BI State
2 BI_In1 :00
3 BI_In2 :0
4 BI_In3 :0
Figure 5.5-1 Viewing the binary input status

A brief explanation about above figure is made in the following table.

No. Display Explanation

1 BI State It shows the submenu title.
2 BI_In1 :0 It shows the binary input name and its value.
3 BI_In2 :0 It shows the binary input name and its value.
4 BI_In3 :0 It shows the binary input name and its value.

Press key “▲” or “▼” to move the cursor upward or downward to view the state of the binary input,
or press key “ ESC” to return to upper level menu.

All the binary inputs and their functional description of the interface unit are listed in
following table.

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No. BI Name Description

1 BI_In1 No.1 transmitted signal binary input
2 BI_In2 No.2 transmitted signal binary input
3 BI_In3 No.3 transmitted signal binary input
4 BI_In4 No.4 transmitted signal binary input
5 BI_In5 No.5 transmitted signal binary input
6 BI_In6 No.6 transmitted signal binary input
7 BI_In7 No.7 transmitted signal binary input
8 BI_In8 No.8 transmitted signal binary input
9 VBI_Out1 No.1 received signal virtual binary output
10 VBI_Out2 No.2 received signal virtual binary output
11 VBI_Out3 No.3 received signal virtual binary output
12 VBI_Out4 No.4 received signal virtual binary output
13 VBI_Out5 No.5 received signal virtual binary output
14 VBI_Out6 No.6 received signal virtual binary output
15 VBI_Out7 No.7 received signal virtual binary output
16 VBI_Out8 No.8 received signal virtual binary output
17 VBI_Out5_Dly No.5 received signal delay virtual binary output
18 VBI_Out6_Dly No.6 received signal delay virtual binary output
19 VBI_Out7_Dly No.7 received signal delay virtual binary output
20 VBI_Out8_Dly No.8 received signal delay virtual binary output
21 BI_Pulse_GPS Binary input of the synchronization clock signal
22 BI_Print Binary input of the printing signal
23 BI_BlkComm Binary input of the device maintenance signal
24 BI_RstTarg Binary input of the target resetting signal

5.5.2 View the Status of Communication Channel

Operating steps:

1. Press key “▲” to enter the main menu at first.

2. Press key “▲” or “▼” to select “VALUES” item by scrolling the cursor upward or downward,
and then press key “ENT” to enter the submenu.

3. Press key “▲” or “▼” to select “COMM CH” item by scrolling the cursor upward or downward,
and then press key “ENT” to view the state of communication channel.

1 Comm Ch
2 4
ID_Remote: 01234
3 Type_Remote: 5
4 t_ChDly :00000us
Figure 5.5-2 Viewing the communication channel status

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A brief explanation about above figure is made in the following table.

No. Display Explanation

1 Comm Ch It shows the submenu title.
2 ID_Remote: It shows the parameter name and its value.
3 Type_Remote: It shows the parameter name and its value.
4 t_ChDly: It shows the parameter name and its value.

Press key “▲” or “▼” to move the cursor upward or downward to view the state of the
communication channel, or press key “ ESC” to return to upper level menu.

All the parameters of the communication channel are described detailedly in Section 3.6
“Communication Channel Status”. Please refer this section for the details about
communication channel status.

5.6 View Software Version

Operating steps:

1. Press key “▲” to enter the main menu at first.

2. Press key “▲” or “▼” to select “VERSION” item by scrolling the cursor upward or downward,
and then press key “ENT” to enter the submenu.

1 FOX-41A
2 Ver : 2.10
3 CRC : 39CC
4 Project: 080152
Figure 5.6-1 Viewing the software version

A brief explanation about all the items is made in the following table.

No. Display Explanation

1 FOX-41A It shows the software program name.
2 Ver : 2.10 It shows the software program version.
3 CRC : 39CC It shows the software program CRC code.
4 Project: 080152 It shows the software program project number.
5 2008-04-18 09:18 It shows the software program creation time.
6 SUBQ: 00039326 It shows the software program task code.

Press key “▲” or “▼” to move the cursor upward or downward to view all the relevant information,
or press key “ ESC” to return to upper level menu.

NOTE: The software version is according to the program which is applied in a pr actical

engineering, above description is only a sample.

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5.7 View the Reports

5.7.1 View Reports through LCD

If you want to see history alarm reports or binary input change reports on the LCD, please operate
according to the following steps.

Operating steps

1. Press key “▲” to enter the main menu at first.

2. Press key “▲” or “▼” to select “REPORT” item by scrolling the cursor upward or downward,
and then press key “ENT” to enter the submenu.

3. Press key “▲” or “▼” to select “ALM REPORT” or “BI CHG REPORT” by scrolling the cursor
upward or downward, and then press key “ENT” to display the selected report.

4. Press key “▲” or “▼” to view different history reports.

The latest report will be displayed firstly. Press key “▲”or “▼” to view the next or last report. If the
report cannot be completely displayed by one screen, they will scroll from right to left one by one.
The alarm report shown on the LCD is described in Section 5.3.2 “Display under Abnormal
Condition”.

If there is no report, the LCD will display “No Report”.

In order to return to upper level menu , simply press key “ESC”.

5.7.2 View Reports by Printing

If you want to see history alarm reports or binary input change reports through a printer, please
operate according to the following steps.

Operating steps:

1. Press key “▲” to enter the main menu at first.

2. Press key “▲” or “▼” to select “PRINT” item by scrolling the cursor upward or downward, and
then press key “ENT” to enter the submenu.

3. Press key “▲” or “▼” to select “ALM REPORT” or “BI CHG REPORT” by scrolling the cursor
upward or downward, and then press key “ENT” to print the selected reports.

It can print all the same type reports once time, and it is very convenient for analyzing the reports.

In order to return to upper level submenu, simply press key “ESC”.

5.8 Operation through Keypad

5.8.1 Change the Settings

Please locate the setting you want to change by operating the keypad as described in Section 5.4

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“View the Settings”.

Press key “◄” or “►” to move the cursor to the digit to be modified. Then press key “+” and “–” to
change the digit. Press key “+” once to add “1” to the digit and press key “–” once to subtract “1”
from the digit.

After finishing the modification, press key “ENT” to confirm the modification. Then a password
input interface is displayed on the LCD.

Press key “+”, “◄”, “▲”, and “-” in sequence to input the correct password and then press key
“ENT”, the FOX-41A will restart and the new settings will be in service.

Password: ....

Figure 5.8-1 Password input interface

If the inputted password is wrong, the LCD will keep displaying as Figure 5.8-1.

Press key “ESC” to cancel the modification before confirming the modification and return to upper
level submenu.

5.8.2 Switch Active Setting Group

Sometimes it is necessary to switch active setting group to fit the different operating conditions.
There are two methods to switch settings group.

The simple method is pressing key “GRP” to enter the setting group switch interface. Press key “+”
or “-” to select the expected setting group, and then press key “ENT” to confirm the selection. The
FOX-41A will restart and the new setting group will be in service.

Chg Act Grp

Active Grp: 01
Change To: 01
Figure 5.8-2 Setting group switching interface

Another method for switching active setting group is described as following operating steps.

1. Press key “▲” to enter the main menu at first.

2. Press key “▲” or “▼” to select “SETTINGS” item by scrolling the cursor upward or downward,
and then press key “ENT” to enter the submenu.

3. Press key “▼”or “▼” to select “EQUIP SETTINGS” by scrolling the cursor upward or

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downward, and then press key “ENT” to display the equipment setting symbols and values.

4. Locate the cursor on the value of the setting [Active_Grp], and press key “+” or “-” to select the
expected setting group, and then press key “ENT” to confirm the modification.

Equip Set
Active_Grp
011
Comm_Addr
Figure 5.8-3 Setting group modification interface

5. Input the password through the password input interface (Shown in Figure 5.8-1) and then
press key “ENT”, the FOX-41A will restart and the new setting group will be in service.

Press key “ESC” to cancel the modification before confirming the modification and return to upper
level submenu.

5.8.3 Print Reports

Please refer the Section 5.7.2 “View Reports by Printing” for details.

5.8.4 Delete Reports

If you want to delete the all reports, you can follow the operating steps.

NOTE: You can’t select which kind of reports or which one report to be deleted. This

operation only can delete the all reports.

Operating steps:

1. Press key “+”, “-”, “+”, and “-” in sequence to enter the deleting reports confirmation interface.

Press <ENT>
PressESC ToExit

Figure 5.8-4 Deleting reports confirmation interface

2. Press key “ENT” to delete the all reports, or press “ESC” to give the operation up.

5.8.5 Clock Set

Please set the equipment clock as following steps.

1. Press key “▲” to enter the main menu at first.

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 Chapter 5 HMI Operation Introduction

2. Press key “▲” or “▼” to select “CLOCK” item by scrolling the cursor upward or downward,
and then press key “ENT” to enter the submenu.

3. Press key “◄”, “►”, “▲” or “▼” to move the cursor to the digit to be modified. Then press key
“+” and “–” to change the digit. Press key “+” once to add “1” to the digit and press key “–”
once to subtract “1” from the digit.

4. At last, press “ENT” to confirm the modification or press “ESC” to give the modification up.

CLOCK

0 06 22
DATE: 2008
TIME: 13 35 38
Figure 5.8-5 Clock set interface

 DATE: 2008 06 22 shows the current date July 22nd 2008.

 TIME: 13 35 38 shows the current time 13:35:38

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Chapter 5 HMI Operation Introduction

44 NR ELECTRIC CO., LTD

 Chapter 6 Settings

Chapter 6 Settings

6.1 Overview

The settings are used to determine the operation mode of the interface. It is necessary to
configure the settings according to practical engineering demand before putting it into service. If
the settings aren’t configured correctly, this device maybe work abnormally, even sometimes much
more serious accident will occur.

The settings of this interface unit include equipment settings, communication channel settings and
Ethernet settings. The user can configure these settings or parameters manually (see Section
5.8.1 “Change the Settings”). Remote modification is also supported through the SCADA platform.

NOTE: If the CPU module is replaced, it is necessary to configure all the settings same as

the settings of the replaced CPU module.

6.2 Equipment Settings (EQUIP SETTINGS)

The configuration of equipment settings is mainly used to set the parameters of the
communication ports in the FOX-41A.

The following table lists all the equipment parameters.

No. Menu text Explanation Range

1 Active_Grp Setting group number 0~29
2 Comm_Addr Communication address 0~254
3 COM1_Baud Communication rate of the No.1 port 4800~38400
4 COM2_Baud Communication rate of the No.2 port 4800~38400
5 Printer_Baud Communication rate of the printer port 4800~38400
6 Debug_Baud Communication rate of the commissioning port 4800~9600
7 Equip_ID The device name of the interface unit
8 En_Net_Print Enable to use the net printer 0/1
9 En_Auto_Print Enable to print automatically 0/1
10 Protocol Communication protocol for connecting with SCADA 0/1
11 GPS_Pulse The type of the GPS synchronization signal 0/1
12 En_Remote_Cfg Enable to modify the settings through SCADA 0/1

1. There are up to 30 setting groups used for storing various settings, and the range is from 0 to
29. Any of them can be set as active group. There are two ways to modify the setting group,
one is entering the submenu “EQUIP SETTINGS” through LCD at the local control panel; the
other way is to modify the setting through the key “GRP”.

2. The equipment address (Comm_Addr) is used to indentify the device when the device

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Chapter 6 Settings

communicates with the SCADA system. It must be unique within the whole substation.

3. The No.3 ~ No.6 settings are used to configure the communication rate of the communication
ports respectively. The communication rate is selected only one from 4800, 9600, 19200 and
38400 bit/s.

4. The device name is used set the name of the current FOX-41A, and it is only available in
printing reports.

5. The setting [En_Net_Print] is used to enable to use the net printer. If it is set as “1”, the net
printer is applied; otherwise, the local printer is applied.

6. The setting [En_Auto_Print] is used to enable to print automatically.

7. The setting [Protocol] is used to select the communication protocol for connecting with
SCADA. If it is set as “0”, the IEC 60870-5-103 protocol is applied; otherwise, the LFP
protocol (a proprietary protocol developed by NR) is applied. The IEC 60870-5-103 protocol is
recommended.

8. The setting [GPS_ Pulse] is used to select the type of the GPS synchronization signal. If it is
set as “0”, the PPS signal is applied; otherwise, the PPM signal is applied. If the IRIG -B signal
is applied, this setting doesn’t need to be configured.

9. The setting [En_Remote_Cfg] is used to permit to modify the settings through SCADA. If it is
set as “1”, modifying setting through SCADA is permitted.

6.3 Communication Channel Settings (CH SETTINGS)

The communication channel settings are used to determine the parameters of the communication
channel.

NOTE: Before configuring the settings, setting group must be configured first.

The following table lists all the communication channel parameters.

No. Menu text Explanation Range

1 ID_Local The pilot identification code of local FOX-41A 0~65535
2 ID_Remote The pilot identification code of remote FXO-41A 0~65535
3 t_Dly_Out5 The output delay time of the No.5 channel 0~1000ms
4 t_Ext_Out5 The output extension time of the No.5 channel 0~1000ms
5 t_Dly_Out6 The output delay time of the No.6 channel 0~1000ms
6 t_Ext_Out6 The output extension time of the No.6 channel 0~1000ms
7 t_Dly_Out7 The output delay time of the No.7 channel 0~1000ms
8 t_Ext_Out7 The output extension time of the No.7 channel 0~1000ms
9 t_Dly_Out8 The output delay time of the No.8 channel 0~1000ms
10 t_Ext_Out8 The output extension time of the No.8 channel 0~1000ms
11 Line_ID The line code number 0~65535

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 Chapter 6 Settings

Enable or disable the inner clock: 0,1

12 En_InnClock 0: Use the external clock as transmission clock
1: Use the inner clock as transmission clock
Select the transmission rate: 0,1
13 Opt_DataRate 0: the transmission rate is 64kbit/s.
1: the transmission rate is 2048kbit/s
14 En_OnlyRecv Enable the device as only receiving terminal 0,1
15 En_OnlySend Enable the device as Only transmitting terminal 0,1

1. The settings [ID_Local] and [ID_Remote] are used to configure the pilot identification codes of
the local FOX-41A and the remote FOX-41A respectively. See Section 3.3 for more details.

2. The No.3 to No.10 settings in above list are used to delay or extend the reception signals of
the No.5 channel to No.8 channel respectively. See Section 3.4 for more details.

3. The setting [Line_ID] is used to set the line code number; it must be set according to the
practical line code number.

4. The setting [En_InnClock] is used to enable or disable the inner clock. See Section 3.2 for
more details.

5. The setting [Opt_DataRate] is used to select the transmission rate. See Section 3.2 for more
details.

6. The settings [En_OnlyRecv] and [En_OnlySend] are used to set the operation mode of the
FOX-41A. See Section 3.2 for more details.

6.4 Ethernet Settings (IP Address)

The Ethernet settings are used to configure the IP address when the FOX-41A communicates with
SCADA through Ethernet.

When the Ethernet communication is adopted, the COM module must be selected the type E COM
module or type G COM module. See Section 4.7. for more details about the two types of COM
modules.

The following table lists all the Ethernet settings.

No. Menu text Explanation

1 IP_Addr1 The IP address of the No.1 Ethernet port
2 IP_Addr2 The IP address of the No.2 Ethernet port
3 IP_Addr3 The IP address of the No.3 Ethernet port
4 IP_Addr4 The IP address of the No.4 Ethernet port

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Chapter 6 Settings

48 NR ELECTRIC CO., LTD

 Chapter 7 Communication

Chapter 7 Communication

7.1 General

This section outlines the remote data communication interfaces of the FOX-41A. The device only
supports two protocols: IEC60870-5-103 or IEC61850.

This device can communicate with SCADA with the RS-485 ports or the Ethernet ports.

It should be noted that the descriptions contained within this section do not aim to fully detail the
protocol itself. The relevant documentation for the protocols should be referred to for this
information. This section serves to describe the specific implementation of the protocol s in the
device.

7.2 Communication Module

The FOX-41A provides several communication modules to meet the practical demand , and only
one kind of communication module can be used in the FOX-41A at the same time. These
communication modules provide serial ports and Ethernet ports. See section 4.7 for more details.

7.2.1 RS-485 Interface

The communication module provides some RS-485 communication ports. See Section 4.7 for
details of the connection terminals of each RS-485 port. The RS-485 serial communication port is
intended for use with a permanently wired connection to a remote control center.

7.2.1.1 EIA RS-485 Standardized Bus

The EIA RS-485 two-wire connection provides a half-duplex fully isolated serial connection to the
product. The connection is polarized and whilst the product’s connection diagrams indicate the
polarization of the connection terminals it should be bor ne in mind that there is no agreed
definition of which terminal is which. If the master is unable to communicate with the product, and
the communication parameters match, then it is possible that the two -wire connection is reversed.

7.2.1.2 Bus Termination

The EIA RS-485 bus must have 120Ω (Ohm) ½ Watt terminating resistors fitted at either end
across the signal wires (see Figure 7.2-1). Some devices may be able to provide the bus
terminating resistors by different connection or configuration arrangements, in which case
separate external components will not be required. However, this product does not provide such a
facility, so if it is located at the bus terminus then an external termination resistor will be required.

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Chapter 7 Communication

EIA RS-485
Master 120 Ohm

120 Ohm

Slave Slave Slave

Figure 7.2-1 EIA RS-485 bus connection arrangements

7.2.1.3 Bus Connections & Topologies

The EIA RS-485 standard requires that each device is directly connected to the physical cable that
is the communications bus. Stubs and tees are expressly forbidden, such as star topologies. Loop
bus topologies are not part of the EIA RS-485 standard and are forbidden by it also.

Two-core screened cable is recommended. The specification of the cable will be dependent on the
application, although a multi-strand 0.5mm2 per core is normally adequate. Total cable length must
not exceed 500m. The screen must be continuous and connected to ground at one end, normally
at the master connection point; it is important to avoid circulating currents, especially when the
cable runs between buildings, for both safety and noise reasons.

This product does not provide a signal ground connection. If a signal ground connection is present
in the bus cable then it must be ignored, although it must have continuity for the benefit of othe r
devices connected to the bus. At no stage must the signal ground be connected to the cables
screen or to the product’s chassis. This is for both safety and noise reasons.

7.2.1.4 Biasing

It may also be necessary to bias the signal wires to prevent jabber. Jabber occurs when the signal
level has an indeterminate state because the bus is not being actively driven. This can occur when
all the slaves are in receive mode and the master is slow to turn from receive mode to transmit
mode. This may be because the master purposefully waits in receive mode, or even in a high
impedance state, until it has something to transmit. Jabber causes the receiving device(s) to miss
the first bits of the first character in the packet, which results in the slave rejecting the message
and consequentially not responding. Symptoms of these are poor response times (due to retries),
increasing message error counters, erratic communications, and even a complete failure to
communicate.

Biasing requires that the signal lines be weakly pulled to a defined voltage level of about 1V. There
should only be one bias point on the bus, which is best situated at the master connection point.
The DC source used for the bias must be clean; otherwise noise will be injected. Note that some
devices may (optionally) be able to provide the bus bias, in which case external components will
not be required.

NOTE:

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 Chapter 7 Communication

 It is extremely important that the 120Ω termination resistors are fitted. Failure to do so will
result in an excessive bias voltage that may damage the devices connected to the bus.

 As the field voltage is much higher than that required, NR cannot assume responsibility for
any damage that may occur to a device connected to the network as a result of incorrect
application of this voltage.

 Ensure that the field voltage is not being used for other purposes (i.e. powering logic inputs)
as this may cause noise to be passed to the communication network.

7.2.2 Ethernet Interface

This device provides for Ethernet interfaces and they are unattached each other. The IP address
of each Ethernet port can be configured in the submenu “Ethernet Settings”.

7.2.2.1 Ethernet Standardized Communication Cable

It is recommended to use twisted screened eight-core cable as the communication cable. A picture
is shown bellow.

Figure 7.2-2 Ethernet communication cable

7.2.2.2 Connections and Topologies

Each device can connect to an exchanger via communication cable and thereby to form a star
structure network. Dual-network is recommended in order to increase reliability. The SCADA is
also connected to the exchanger and will play a role of master station, so the every equipment
which has been connected to the exchanger will play a role of slave unit.

SCADA

Exchanger A

Exchanger B

Equipment Equipment Equipment

Figure 7.2-3 Ethernet communication structure

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Chapter 7 Communication

7.3 IEC60870-5-103 Interface

The IEC60870-5-103 interface is a master/slave interface with this equipment as the slave device.

The equipment conforms to compatibility level 2; compatibility level 3 is not supported.

The following IEC60870-5-103 facilities are supported by this interface:

 Initialization (reset)

 Time synchronization

 Event record extraction

 General interrogation

 General commands

7.3.1 Physical Connection and Link Layer

Two EIA RS-485 standardized ports are available for IEC60870-5-103 in this equipment. The
transmission speed is optional: 4800 bit/s, 9600 bit/s, 19200 bit/s or 38400 bit/s.

Two or three unattached Ethernet ports are available for IEC60870-5-103 in this equipment. The
transmission speed is 100M/s.

The link layer strictly abides by the rules defined in the IEC60870-5-103.

7.3.2 Initialization
Whenever the equipment has been powered up, or if the communication parameters have been
changed, a reset command is required to initialize the communications. The equipment will
respond to either of the two reset commands (Reset CU or Reset FCB), the difference is that the
Reset CU will clear any unsent messages in the equipment’s transmit buffer.

The equipment will respond to the reset command with an identification message ASDU 5, the
COT (Cause Of Transmission) of this response will be either Reset CU or Reset FCB depending
on the nature of the reset command.

In addition to the above identification message, if the equipment has been powered up it will also
produce a power up event.

7.3.3 Time Synchronization

The equipment time and date can be set using the time synchronization feature of the
IEC60870-5-103 protocol. The equipment will correct for the transmission delay as specified in
IEC60870-5-103. If the time synchronization message is sent as a send/confirm message then the
equipment will respond with a confirmation. Whether the time-synchronization message is sent as
a send confirmation or a broadcast (send/no reply) message, a time synchronization Class 1 event
will be generated/produced.

If the equipment clock is synchronized using the IRIG-B input then it will not be possible to set the

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 Chapter 7 Communication

equipment time using the IEC60870-5-103 interface. An attempt to set the time via the interface
will cause the equipment to create an event with the current date and time taken from the IRIG-B
synchronized internal clock.

7.3.4 Spontaneous Events

Events are categorized using the following information:

 Type identification (TYP)

 Function type (FUN)

 Information number (INF)

The following table contains a complete listing of all events produced by the equipment. For the
details about this events, see relevant sections in Chapter 5.

TYP FUN INF COT Event

250 1 1 BI_In1
250 2 1 BI_In2
250 3 1 BI_In3
250 4 1 BI_In4
250 5 1 BI_In5
250 6 1 BI_In6
250 7 1 BI_In7
250 8 1 BI_In8
250 9 1 VBI_Out1
250 10 1 VBI_Out2
250 11 1 VBI_Out3
250 12 1 VBI_Out4
250 13 1 VBI_Out5
250 14 1 VBI_Out6
ASDU 1 250 15 1 VBI_Out7
250 16 1 VBI_Out8
250 30 1 VBI_Out5_Dly
250 31 1 VBI_Out6_Dly
250 32 1 VBI_Out7_Dly
250 33 1 VBI_Out8_Dly
250 20 1 BI_BlkComm
250 194 1 Alm_RAM
250 195 1 Alm_ROM
250 196 1 Alm_EEPROM
250 49 1 Alm_InvalidGrp
250 44 1 Alm_PS_DC
250 202 1 Alm_PS_Opto
250 212 1 Alm_TripOut
250 22 1 Alm_FramDly

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Chapter 7 Communication

250 26 1 Alm_ID_Ch
250 27 1 Alm_PersistBI
250 28 1 Alm_PersistBO

7.3.5 General Interrogation

The GI can be used to read the status of the equipment, the function numbers, and information
numbers that will be returned during the GI cycle. The GI cycle strictly abides by the rules defined
in the IEC60870-5-103.

The equipment will respond to this GI command with an ASDU 44 message, the cause of
transmission (COT) of this response is 9.

Referring the IEC60870-5-103 standard can get the enough details about general interrogation.

7.3.6 Generic Functions

The generic functions can be used to read the setting and protection measurement of the
equipment, and modify the setting. Two supported type identifications are ASDU 21 and ASDU 10.
For more details about generic functions, see the IEC60870-5-103 standard.

7.4 IEC60870-5-103 Interface over Ethernet

The IEC60870-5-103 interface over Ethernet is a master/slave interface with the equipment as the
slave device. It is properly developed by NR too. All the service of this equipment is based on
generic functions of the IEC60870-5-103. The following table lists all the group number of this
equipment. And this equipment will send all the relevant information about group caption to the
SAS or RTU after establishing a successful communication link.

Group Number Group Caption Description

0 Device information
1 Equipment settings
2 Setting group number
3 Communication channel settings
11 Ethernet settings

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 Chapter 8 Installation

Chapter 8 Installation

8.1 General

The equipment must be shipped, stored and installed with the greatest care.

Choose the place of installation such that the communication interface and the controls on the
front of the device are easily accessible.

Air must circulate freely around the equipment. Observe all the requirements regarding place of
installation and ambient conditions given in this instruction manual.

Take care that the external wiring is properly brought into the equipment and terminated correctly
and pay special attention to grounding. Strictly observe the correspond ing guidelines contained in
this section.

8.2 Safety Instructions

Modules and units may only be replaced by correspondingly trained personnel. Always observe
the basic precautions to avoid damage due to electrostatic discharge when handling the
equipment.

In certain cases, the settings have to be configured according to the demands of the engineering
configuration after replacement. It is therefore assumed that the personnel who replace modules
and units are familiar with the use of the operator program on the service PC.

DANGER: Only insert or withdraw the DC module while the power supply is switched off.

To this end, disconnect the power supply cable that connects with the DC module.

WARNING: Only insert or withdraw the other boards while the power supply is switched

off.

WARNING: The modules of this equipment may only be inserted in the slots designated

in Section 4.2. Components can be damaged or destroyed by inserting boards in the

wrong slots.

DANGER: Improper handling of the equipment can cause damage or an incorrect

response of the equipment itself or the primary plant.

WARNING: Industry packs and ribbon cables may only be replaced or the positions of

jumpers be changed on a workbench appropriately designed for working on electronic

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Chapter 8 Installation

equipment. The modules of the FOX-41A, bus backplanes are sensitive to electrostatic
discharge when not in the unit's housing.

The basic precautions to guard against electrostatic discharge are as follows:

 Should boards have to be removed from FOX-41A installed in a grounded cubicle in an HV

switchgear installation, discharge yourself by touching station ground (the cubicle)
beforehand.

 Only hold electronic boards at the edges, taking care not to touch the components.

 Only works on boards that have been removed from the cubicle on a workbench designed for
electronic equipment and wear a grounded wristband. Do not wear a grounded wristband,
however, while inserting or withdrawing units.

 Always store and ship the electronic boards in their original packing. Place electronic parts in
electrostatic screened packing materials.

8.3 Checking the Shipment

Check that the consignment is complete immediately upon receipt. Notify the nearest NR
Company or agent, should departures from the delivery note, the shipping papers or the order be
found.

Visually inspect all the material when unpacking it. When there is evidence of transport damage,
lodge a claim immediately in writing with the last carrier and notify the nearest NR Company or
agent.

If the equipment is not going to be installed immediately, store all the parts in their original packing
in a clean dry place at a moderate temperature. The humidity should not exceed 90% at a
maximum temperature of +55°C; the permissible storage temperature range in dry air is -40°C to
+70°C.

8.4 Material and Tools Required

The necessary mounting kits will be provided, including screws, pin cers and assembly
instructions.

A suitable drill and spanners are required to secure the cubicles to the floor using the plugs
provided (if FOX-41A is mounted in cubicles).

8.5 Device Location and Ambient Conditions

The place of installation should permit easy access especially to front of the device, i.e. to the
human-machine interface of the equipment.

There should also be free access at the rear of the equipment for additions and replacement of

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 Chapter 8 Installation

electronic boards.

Since every piece of technical equipment can be damaged or destroyed by inadmissible ambient
conditions, such as:

1) The location should not be exposed to excessive air pollution (dust, aggressive substances).

2) Severe vibration, extreme changes of temperature, high levels of humidity, surge voltages of
high amplitude and short rise time and strong induced magnetic fields should be avoided as
far as possible.

3) Air must not be allowed to circulate freely around the equipment.

The equipment can in principle be mounted in any attitude, but it is normally mount ed vertically
(visibility of markings).

WARNING: Excessively high temperature can appreciably reduce the operating life of

the FOX-41A.

8.6 Mechanical Installation

This device is made of a single layer 4U height 19” chassis with some connectors on its rear panel
(See Figure 4.1-2). Figure 8.6-1 shows the dimensions of FOX-41A for reference in mounting.

1.0
29

HEALTHY ALARM

OUT1 IN1

OUT2 IN2

FOX－41A
P

OUT3 IN3
GR

Interface Unit
101.6
177.0

OUT4 IN4

OUT5 IN5 ENT

ESC

OUT6 IN6

OUT7 IN7

OUT8 IN8

NARI-RELAYS ELECTRIC CO.,LTD

TARGET RESET

465.0
482.6

465.0

4-Φ6.8
179.0
101.6

Cut-out in the cubicle

450.0

Figure 8.6-1 Dimensions of the FOX-41A and the cut-out in the cubicle (unit: mm)

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Chapter 8 Installation

NOTE: It is necessary to leave enough space top and bottom of the cut-out in the cubicle

for heat emission of the FOX-41A.

As mentioned former (Chapter 4 “Hardware Description”), up to four modules are installed in the
enclosure of the FOX-41A, and these modules must be plugged into the proper slots of the
FOX-41A respectively. The safety instructions must be abided by when installing the boards, see
Section 8.2 “Safety Instructions”.

In the case of equipment supplied in cubicles, place the cubicles on the foundations that have
been prepared. Take care while doing so not to jam or otherwise damage any of the cables that
have already been installed. Secure the cubicles to the foundations.

8.7 Electrical Installation and Wiring

8.7.1 Grounding Guidelines

Switching operations in HV installations generate transient over voltages on control signal cables.
There is also a background of electromagnetic RF fields in electrical installations that can induce
spurious currents in the devices themselves or the leads connected to them.

All these influences can influence the operation of electronic apparatus.

On the other hand, electronic apparatus can transmit interference that can disrupt the operation of
other apparatus.

In order to minimize these influences as far as possible, certain standards have to be observed
with respect to grounding, wiring and screening.

NOTE: All these precautions can only be effective if the station ground is of good quality.

8.7.2 Cubicle Grounding

The cubicle must be designed and fitted out such that the impedance for R F interference of the
ground path from the electronic device to the cubicle ground terminal is as low as possible.

Metal accessories such as side plates, blanking plates etc., must be effectively connected
surface-to-surface to the grounded frame to ensure a low-impedance path to ground for RF
interference. The contact surfaces must not only conduct well, they must also be non -corroding.

NOTE: If the above conditions are not fulfilled, there is a possibility of the cubicle or p arts

of it forming a resonant circuit at certain frequencies that would amplify the transmission
of interference by the devices installed and also reduce their immunity to induced
interference.

Movable parts of the cubicle such as doors (front and back) or hinged equipment frames must be
effectively grounded to the frame by three braided copper strips (see Figure 8.7-1).

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 Chapter 8 Installation

The metal parts of the cubicle housing and the ground rail are interconnected electrically
conducting and corrosion proof. The contact surfaces shall be as large as possible.

NOTE: For metallic connections please observe the voltage difference of both materials

according to the electrochemical code.

The cubicle ground rail must be effectively connected to the station ground rail by a grounding strip
(braided copper).

Door or hinged
equipment frame

Cubicle ground
rail close to floor

Braided
copper strip
Station
ground

Conducting
connection

Figure 8.7-1 Cubicle grounding system

8.7.3 Ground Connection on the Device

There is a ground terminal on the DC module of the device (see Section 4.3), and the ground
braided copper strip can be connected with it. Take care that the grounding strip is always as short
as possible. The main thing is that the device is only grounded at one point. Grounding loops from
unit to unit are not allowed.

8.7.4 Grounding Strips and their Installation

High frequency currents are produced by interference in the ground connections and because of
skin effect at these frequencies, only the surface region of the grounding strips is of consequence.

The grounding strips must therefore be of (preferably tinned) braided copper and not round copper
conductors, as the cross-section of round copper would have to be too large.

Proper terminations must be fitted to both ends (press/pinch fit and tinned) with a hole for bolting
them firmly to the items to be connected.

The surfaces to which the grounding strips are bolted must be electrically conducting and
non-corroding.

The following figure shows the ground strip and termination.

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Chapter 8 Installation

Press/pinch fit
cable terminal

Braided
copper strip Terminal bolt

Contact surface

Figure 8.7-2 Ground strip and termination

8.7.5 Guidelines for Wiring

There are several types of cables that are used in the connection of FOX-41A: braided copper
cable, serial communication cable etc.

Recommendation of each cable:

 Grounding: braided copper cable, threaded M4, 4.0mm2

 Serial communication: 4-core shielded braided cable

 Ethernet communication: 4-Pair Category 5 Cable

2
 DC Power supply, Binary Output: brained copper cable, 1.5mm

8.7.6 Wiring for Electrical Cables

A female connector is used for connecting the wires with it, and then a female connector plugs into
a corresponding male connector that is in the front of one board. For further details about the pin
defines of these connectors, see Chapter 4 “Hardware Description”.

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 Chapter 9 Commi ssioning

Chapter 9 Commissioning

9.1 General

This device is fully numerical in their design, implementing all protection and non-protection
functions in software. The device employ a high degree of self-checking and in the unlikely event
of a failure, will give an alarm. As a result of this, the commissioning test is very easy to complete.

To commission this device, it is only necessary to verify that the hardware is functioning correctly
and the application-specific software settings have been applied to this device.

Before carrying out any work on the equipment, the user should be familiar with the contents of the
safety and technical data sections and the ratings on the equipment’s rating label.

9.2 Safety Instructions

WARNING: Hazardous voltages are present in this electrical equipment during operation.

Non-observance of the safety rules can result in severe personal injury or property
damage.

WARNING: Only qualified personnel shall work on and around this equipment after

becoming thoroughly familiar with all warnings and safety notices of this manual as well
as with the applicable safety regulations.

Particular attention must be drawn to the following:

 The earthing screw of the device must be connected solidly to the protective earth conductor
before any other electrical connection is made.

 Hazardous voltages can be present on all circuits and components connected to the supply
voltage or to the measuring and test quantities.

 Hazardous voltages can be present in the device even after disconnection of the supply
voltage (storage capacitors!)

 The limit values stated in the technical data (Chapter 2) must not be exceeded at all, not even
during testing and commissioning.

9.3 Setting Familiarization

When commissioning a FOX-41A for the first time, sufficient time should be allowed to become
familiar with the method by which the settings are applied. The Chapter 5 contains a detailed
description of the menu structure of this device.

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With the front cover in place all keys are accessible. All menu cells can be read. LED indicators
and alarms can be reset. Protection or configuration settings can be changed, or fault and event
records cleared. However, menu cells will require the appropriate password to be entered before
changes can be made.

Alternatively, if a portable PC is available together with suitable setting software (such as

RCS-9700 SAS software), the menu can be viewed a page at a time to display a full column of
data and text. This PC software also allows settings to be entered more easily, saved to a file on
disk for future reference or printed to produce a setting record. Refer to the PC software user
manual for details. If the software is being used for the first time, allow sufficient time to become
familiar with its operation.

9.4 Product Checks

These product checks cover all aspects of this device which should be checked to ensure that it
has not been physically damaged prior to commissioning, is functioning correctly and all input
quantity measurements are within the stated tolerances.

If the application-specific settings have been applied to this device prior to commissioning, it is
advisable to make a copy of the settings so as to allow them restoration later. This could be done
by extracting the settings from this device itself via printer or manually creating a setting record.

9.4.1 With the Device De-energized

The FOX-41A is fully numerical and the hardware is continuously monitored. Commissioning tests
can be kept to a minimum and need only include hardware tests and conjunctive tests. The
function tests are carried out according to user’s correlative regulations.

9.4.1.1 Visual Inspection

After unpacking the product, check for any damage to the device case. If there is any damage, the
internal module might also have been affected, contact the vendor. Following items listed is
necessary.

 Device panel

Carefully examine the device panel, the equipment inside and other parts inside to see that no
physical damage has occurred since installation.

 Panel wiring

Check the conducting wire which is used in the panel to assure that their cross section
meeting the requirement.

Carefully examine the wiring to see that they are no connection failure exists.

 Label

Check all the isolator binary inputs, terminal blocks, indicators, switches and push buttons to
make sure that their labels meet the requirements of this project.

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 Equipment plug-in modules

Check each plug-in module of the equipments on the panel to make sure that they are well
installed into the equipment without any screw loosened.

 Earthing cable

Check whether the earthing cable from the panel terminal block is safe ly screwed to the panel
steel sheet.

 Switch, keypad, isolator binary inputs and push button

Check whether all the switches, equipment keypad, isolator binary inputs and push buttons
work normally and smoothly.

9.4.1.2 Insulation Test (if required)

Insulation resistance tests are only necessary during commissioning if it is required for them to be
done and they have not been performed during installation.

Isolate all wiring from the earth and test the isolation with an electronic or brushless insulation
tester at a DC voltage not exceeding 500V, The circuits need to be tested should include:

 DC power supply

 Optic-isolated control inputs

 Output contacts

 Communication ports

The insulation resistance should be greater than 100MΩ at 500V.

Test method:

To unplug all the terminals sockets of this device, and do the Insulation resistance test for each
circuit above with an electronic or brushless insulation tester.

On completion of the insulation resistance tests, ensure all external wiring is correctly reconnected
to the device.

9.4.1.3 Check the Jumpers

In general, the jumpers of the device have been set correctly before sent to user. While, checking
the jumpers is a good habit before this device is brought to service. Setting method of the jumpers
is explained in Chapter 4 detailedly.

9.4.1.4 Auxiliary Supply

The device can be operated from either 110/125Vdc or 220/250Vdc auxiliary supply depending on
the device’s nominal supply rating. The incoming voltage must be within the operating range
specified in the following table, before energizing the device, measure the auxiliary supply to
ensure it within the operating range.

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Rated Voltage 110/125Vdc 220/250Vdc

Variation 80% ~ 120% 80% ~ 120%

It should be noted that the device can withstand an AC ripple of up to 12% of the upper rated
voltage on the DC auxiliary supply.

WARNING: Energize the device only if the auxiliary supply is within the specified

operating ranges.

9.4.2 With the Device Energized

The following groups of checks verify that the hardware and software is functioning correctly and
should be carried out with the auxiliary supply applied to the device.

9.4.2.1 Front Panel LCD Display

The liquid crystal display (LCD) is designed to operate in a wide range of substation ambient
temperatures. For this purpose, this device has an automatic “LCD contrast” adjusting feature,
which is capable to adjust LCD contrast automatically according to the ambient temperature.

Connect the device to DC power supply correctly and turn the device on. Check program version
and forming time displayed in command menu to ensure that are corresponding to what ordered.

9.4.2.2 Date and Time

If the time and date is not being maintained by substation automation system, the date and time
should be set manually.

Set the date and time to the correct local time and date using menu item “CLOCK”.

In the event of the auxiliary supply failing, with a battery fitted on CPU board, the time and date will
be maintained. Therefore when the auxiliary supply is restored the time and date will be correct
and not need to set again.

To test this, remove the auxiliary supply from the device for approximately 30s. After being
re-energized, the time and date should be correct.

9.4.2.3 Light Emitting Diodes (LEDs)

On power up, the green LED “HEALTHY” should have been lit and stayed on indicating that the
device is healthy.

Apply the rated DC Power supply and check that the “HEALTHY” LED is lighting in green. We
need to emphasize that the “HEALTHY” LED is always lighting in operation course except that the
equipment find serious errors in it.

Produce one of the abnormal conditions listed in Section 5.1.4, the “ALARM ” LED will light in
yellow. When abnormal condition reset, the “ALARM ” LED extinguishes.

9.4.2.4 Testing the Binary Inputs

This test checks that all the binary inputs of the device are functioning correctly.

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The binary inputs should be energized one at a time, see external connection diagrams for
terminal numbers.

Ensure that the voltage applied on the binary input must be within the operating range.

The status of each binary input can be viewed using menu item “ BI STATE”. Sign “1” denotes an
energized input and sign “0” denotes a de-energized input.

9.4.3 Functional Testing

The functional testing is used to check the channels and the software of the device. The
self-sending self-receiving method is applied to check the function of this device.

1. Configure the settings

 Set the settings [ID_Local] and [ID_Remote] as the same number in the submenu “CH
SETTINGS”.

 Set the setting [En_InnClock] as “1” in the submenu “CH SETTINGS”.

 Set the setting [Opt_DataRate] as “1” in the submenu “CH SETTINGS”.

 Set the settings [En_OnlyRecv] and [En_OnlySend] as “0” in the submenu “CH
SETTINGS”.

2. Connect the external wiring

 Connect the optical fiber interfaces together on the EO module by an optical fiber cable.

 Connect the DC module and the OPT1 module as shown in Figure 4.8-1.

3. Check the function

 Energize this device.

 Energize the signal binary inputs on the OPT1 modules one by one, and the energized
time is not longer than 20s, otherwise this device will issue the alarm signal
“Alm_PersistBI”. If one of the binary inputs and the function of this device are healthy, the
corresponding outputs of the energized binary input have signals; and the relevant LED
indicators “OUTx” and “INx” (x: 1~8) will be lit.

9.4.4 Final Checks

After the above tests are completed, remove all test or temporary shorting leads, etc. If it has been
necessary to disconnect any of the external wiring from the device in order to perform the wiring
verification tests, it should be ensured that all connections are replaced in accordance with the
relevant external connection or scheme diagram.

Ensure that the device has been restored to service.

Ensure that all event records and alarms have been cleared and LED’s has been reset before
leaving this device.

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Chapter 10 Maintenance

10.1 Maintenance Schedule

It is recommended that products supplied by NR receive periodic monitoring after installation. In

view of the critical nature of the device and their infrequent operation, it is desirable to confirm that
they are operating correctly at regular intervals.

This device is self-supervised and so requires less maintenance. Most problems will result in an
alarm so that remedial action can be taken. However, some periodic tests should be done to
ensure that the device is functioning correctly and the external wiring is intact.

10.2 Regular Testing

The device is almost completely self-supervised. The circuits which can not be supervised are
binary input, output circuits and human machine interfaces. Therefore regular testing can be
minimized to checking the unsupervised circuits.

10.3 Failure Tracing and Repair

Failures will be detected by automatic supervision or regular testing.

When a failure is detected by supervision, a remote alarm is issued and the failure is indicated on
the front panel with LED indicators and LCD display. It is also recorded in the alarm record.
Failures detected by supervision are traced by checking the “ ALM REPORT” screen on the LCD.
See Section 5.3.2 “Display under Abnormal Condition” for the details of the alarm events.

When a failure is detected during regular testing, confirm the following:

 Test circuit connections are correct

 Modules are securely inserted in position

 Correct DC power voltage is applied

 Test procedures comply with those stated in the manual

10.4 Replace Failed Modules

If the failure is identified to be in the module of this device and the user has spare modules, the
user can recover the protection by replacing the failed modules.

Repair at the site should be limited to module replacement. Maintenance at the component level is
not recommended.

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Check that the replacement module has an identical module name (DC, EO, CPU, COM, OPT1,
SIG, OUT1, OUT2, OUT) and hardware type-form as the removed module. Furthermore, the CPU
module replaced should have the same software version. And the DC module replaced should
have the same ratings.

WARNING: Units and modules may only be replaced while the supply is switched off and

only by appropriately trained and qualified personnel. Strictly observe the basic
precautions to guard against electrostatic discharge.

WARNING: When handling a module, take anti-static measures such as wearing an

earthed wrist band and placing modules on an earthed conductive mat. Otherwise, many
of the electronic components could suffer damage. After replacing the CPU module,
check the settings.

DANGER: After replacing modules, be sure to check that the same configuration is set

as before the replacement. If this is not the case, there is a danger of the unintended
operation of switchgear taking place or of protections not functioning correctly. Persons
may also be put in danger.

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Chapter 11 Decommissioning and Disposal

11.1 Decommissioning

11.1.1 Switching off

To switch off the FOX-41A, switch off the external miniature circuit breaker of the power supply.

11.1.2 Disconnecting cables

Disconnect the cables in accordance with the rules and recommendations made by relational
department.

DANGER: Before disconnecting the power supply cables that connected with the DC

module of the FOX-41A, make sure that the external miniature circuit breaker of the
power supply is switched off.

11.1.3 Dismantling
The FOX-41A rack may now be removed from the system cubicle, after which the cubicles may
also be removed.

DANGER: When the station is in operation, make sure that there is an adequate safety

distance to live parts, especially as dismantling is often performed by unskilled personnel.

11.2 Disposal

In every country there are companies specialized in the proper disposal of electronic waste.

NOTE: Strictly observe all local and national regulations when disposing of the device.

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Chapter 12 Manual Version History

In the manual version 1.00 of FOX-41A, several descriptions on existing features have been
modified. These are described with reference to the table listed below:

Software Manual
Source Documentation
Version Version
2.10 1.00 FOX-41A_Standard_V1.00.doc

Manual
Section Page No. Description of change Note
Version

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