GOVERNMENT OF INDIA MINISTRY OF RAILWAYS Maintenance ...

End Users: SSEs/JEs & Signal Maintainers

INDIAN RAILWAYS

Centre for Advanced Maintenance Technology

Maharajpur, Gwalior (M.P.) Pin Code – 474 005

Maintenance Handbook on

Block Proving By Axle Counter using

UFSBI

GOVERNMENT OF INDIA

MINISTRY OF RAILWAYS

CAMTECH/S/PROJ/2020-21/SP11/1.0

March 2021

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This page has been left blank intentionally

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Maintenance Handbook on


UFSBI

CAMTECH/S/PROJ/2020-21/SP11/1.0

March 2021

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iv

Foreword

Railway Signalling has come a long way from Mechanical Signalling, Electro-

Mechanical Signalling to present day Electronics, Communications and

software based Signalling. Block working is an integrated part of Railway

Signalling and this area is also not untouched with regard to modernisation.

Application of Universal Failsafe Block Interface (UFSBI) in Block Working

has improved the safety of operation and eliminated some inherent problems of

conventional system like generally present noise in the transmission system. Its

user friendly and non-cooperative features make its operation smooth for

operating personnel.

As Block Proving by Axle Counter using UFSBI is being installed at a large

number of stations on Indian Railways, CAMTECH has issued this maintenance

handbook for SSEs/JEs and Signal Maintainers to help them in maintaining the

system. The information given in this handbook is compiled in an easy to

understand steps.

I hope that this handbook will be helpful to Signal personnel of Indian Railways

in enhancing their knowledge. I wish them all the success.

CAMTECH Gwalior Jitendra Singh

Principal Executive Director

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vi

Preface

The Universal Fail Safe Block Interface (UFSBI) has applications in Automatic

Signalling, IBS, Gate and slot transfer to reduce the number of copper

conductors. The UFSBI system acts as a failsafe multiplexer for communicating

the commands from one block panel to other in Block Proving by Axle Counter

(BPAC). It has applications in all types of single line and double line block

instruments. Further improvements like provision of Electronic Logic Block

Module (EBLM) for avoiding use of relays in UFSBI cubicle has also been

done.

CAMTECH has prepared this maintenance handbook for SSEs, JEs and Signal

Maintainers maintaining BPAC system using UFSBI in their section. For quick

reference, Maintenance guidelines, Troubleshooting and Pre-commissioning

check lists for systems of RDSO approved manufacturers have been

incorporated in the maintenance handbook.

We are sincerely thankful to Signal Directorate RDSO, M/s Webfil Ltd.,

Kolkata and M/s Deltron Equipment & Systems Pvt. Ltd., Kolkata, who helped

us in preparing this handbook. Since technological upgradation and learning is a

continuous process, you may feel the need for some addition/modification in

this handbook. If so, please give your comments on email address

[email protected] or write to us at Indian Railways Centre for

Advanced Maintenance Technology, In front of Adityaz Hotel, Airport Road,

Near DD Nagar, Maharajpur, Gwalior (M.P.) 474005.

CAMTECH Gwalior Dinesh Kumar Kalame

Date: Director (S&T)

mailto:[email protected]

vii


viii

Table of Contents

Foreword ................................................................................................................................................ iv

Preface ................................................................................................................................................... vi

Table of Contents ................................................................................................................................. viii

Issue of correction slips .......................................................................................................................... x

Disclaimer............................................................................................................................................... xi

Our Objective ........................................................................................................................................ xii

CAMTECH Publications......................................................................................................................... xiii

List of Figures ........................................................................................................................................xiv

List of Tables ......................................................................................................................................... xv

Chapter I ................................................................................................................................................. 1

Universal Fail Safe Block Interface (UFSBI) ......................................................................................... 1

1.1 Introduction ............................................................................................................................... 1

1.2 Block Proving By Axle Counter (BPAC) using UFSBI ............................................................ 2

Chapter II ................................................................................................................................................ 5

Block Proving By Axle Counter using UFSBI –Webfil Make ............................................................... 5

2.1 Introduction ............................................................................................................................... 5

2.2 Sub systems of BPAC with UFSBI............................................................................................ 5

2.3 Salient features .......................................................................................................................... 5

2.4 UFSBI Cubicle ........................................................................................................................... 6

2.5 Cable requirements ................................................................................................................... 9

2.6 Power Supply arrangement..................................................................................................... 10

2.7 Relay Rack & Signalling Relays .......................................................................................... 10

2.8 Description of Modules ............................................................................................................. 17

2.9 Troubleshooting through Alarm display .................................................................................... 27

2.10 Do’s & Don’ts ........................................................................................................................... 32

Annexure I – Details of Quad Cable Connection.............................................................................. 33

Annexure II ....................................................................................................................................... 37

Pre installation check-list for BPAC (As per IRS:S 105/2012 Ver. 0) ............................................. 37

Annexure III ...................................................................................................................................... 38

Pre-commissioning Check List for BPAC (Single Line) (As per IRS:S 105/2012 Ver. 0) .............. 38

Annexure IV...................................................................................................................................... 40

ix

Pre-commissioning Check List for BPAC (Double Line) (As per IRS:S 105/2012 Ver. 0) ............. 40

Chapter III ............................................................................................................................................. 42

Block Proving By Axle Counter using UFSBI -Deltron ....................................................................... 42

3.1 Introduction ............................................................................................................................. 42

3.2 Subsystems of Deltron UFSBI ................................................................................................ 42

3.3 UFSBI Address Configuration Jumpers ..................................................................................... 53

3.4 Relay Rack & Signalling Relays ............................................................................................. 54

3.5 Block Proving with Axle counter –Single Line Block Panel ................................................... 58

3.6 Block Proving with Axle counter –Double Line Block Panel ............................................. 59

3.7 Installation pre-requisites of UFSBI ........................................................................................ 61

3.8 Improvements in UFSBI ............................................................................................................ 62

3.9 Maintenance .............................................................................................................................. 63

3.10 Do’s & Don’ts ........................................................................................................................... 65

3.11 Error code list & recommended actions ............................................................................... 66

Annexure V ....................................................................................................................................... 81

Pre-commissioning Check List for Deltron BPAC using UFSBI & SSDAC ................................... 81

References ............................................................................................................................................ 88

x

Issue of correction slips

The correction slips to be issued in future for this report will be numbered as follows:

CAMTECH/S/PROJ/2020-21/SP11/1.0# XX date .......

Where “XX” is the serial number of the concerned correction slip (starting from 01

onwards).

CORRECTION SLIPS ISSUED

Sr. No. of

Correction

Slip

Date of issue Page no. and Item

No. modified

Remarks

xi

Disclaimer

It is clarified that the information given in this handbook does not

supersede any existing provisions laid down in the Signal

Engineering Manual, Railway Board and RDSO publications. This

document is not statuary and instructions given are for the purpose

of guidance only. If at any point contradiction is observed, then

Signal Engineering Manual, Telecom Engineering Manual Railway

Board/RDSO guidelines may be referred or prevalent Zonal

Railways instructions may be followed.

xii

Our Objective

To upgrade Maintenance Technologies and Methodologies and achieve

improvement in Productivity and Performance of all Railway assets and

manpower which inter-alia would cover Reliability, Availability and

Utilisation.

If you have any suggestion & any specific comments, please write to us:

Contact person : Director (Signal & Telecommunication)

Postal Address : Centre for Advanced Maintenance Technology,

Maharajpur, Gwalior (M.P.) Pin Code – 474 005

Phone : 0751 - 2470185

Fax : 0751 – 2470841

Email : [email protected]


xiii

CAMTECH Publications

CAMTECH is continuing its efforts in the documentation and up-gradation of information on

maintenance practices of Signalling & Telecom assets. Over the years a large number of

publications on Signalling & Telecom subjects have been prepared in the form of handbooks,

pocket books, pamphlets and video films. These publications have been uploaded on the

internet as well as railnet.

For downloading these publications

On Internet:

Visit www.rdso.indianrailways.gov.in Go to Directorates → CAMTECH Gwalior → Other Important links → Publications for

download - S&T Engineering or click on link

https://rdso.indianrailways.gov.in/view_section.jsp?lang=0&id=0,2,17,6313,6321,6326

On Railnet:

Visit RDSO website at 10.100.2.19

Go to Directorates → CAMTECH → Publications → S&T Engineering Or click on the link

http://10.100.2.19/camtech/Publications/CAMTECH%20Publications%20Online/SntPub.htm

A limited number of publications in hard copy are also available in CAMTECH library which

can be got issued by deputing staff with official letter from controllong officer. The letter

should be addressed to Director (S&T), CAMTECH, Gwalior.

For any further information regarding publications please contact:

Director (S&T) – 0751-2470185 (O)(BSNL)

SSE/Signal - 7024141046 (CUG)

Or

Email at [email protected]

Or

FAX to 0751-2470841 (BSNL)

Or

Write at

Director (S&T)

Indian Railways Centre for Advanced Maintenance Technology,

In front of Hotel Adityaz, Airport Road, Maharajpur,

Gwalior (M.P.) 474005

http://www.rdso.indianrailways.gov.in/

https://rdso.indianrailways.gov.in/view_section.jsp?lang=0&id=0,2,17,6313,6321,6326

http://10.100.2.19/camtech/Publications/CAMTECH%20Publications%20Online/SntPub.htm


xiv

List of Figures Figure 1: Front view of Webfil UFSBI cubicle for Single Line ................................................................... 7

Figure 2: Front view of Webfil UFSBI Equipment for Double Line ........................................................... 8

Figure 3: Power Supply Unit Module ..................................................................................................... 17

Figure 4: System Module ....................................................................................................................... 18

Figure 5: Communication Driver ........................................................................................................... 19

Figure 6: Relay Input Module ................................................................................................................ 20

Figure 7: Relay Output Module ............................................................................................................. 21

Figure 8: Relay Feedback Module ......................................................................................................... 22

Figure 9: Display & Reset Panel front view ........................................................................................... 23

Figure 10: Alarm Extender Module front view ...................................................................................... 24

Figure 11: Alarm Panel for SM .............................................................................................................. 25

Figure 12: Block level interconnection diagram (Single Line) ............................................................... 35

Figure 13: Block Level interconnection diagram Double Line ............................................................... 36

Figure 14: Deltron UFSBI Cubicle front view ......................................................................................... 42

Figure 15: Deltron UFSBI Cubicle rear view ........................................................................................... 43

Figure 16: DC-DC Converter front view ................................................................................................. 44

Figure 17: DC-DC Converter rear view .................................................................................................. 44

Figure 18 : UFSBI Digital System ........................................................................................................... 46

Figure 19: Sensing of relays by Input Cards .......................................................................................... 47

Figure 20: Function of CPU & CC Cards ................................................................................................. 48

Figure 21: Function of Output Card ....................................................................................................... 48

Figure 22: Modem Front and Rear views .............................................................................................. 49

Figure 23 : Modem Power connection .................................................................................................. 49

Figure 24 : Modem to Motherboard data connection .......................................................................... 49

Figure 25 : Modem to TX & Rx terminals .............................................................................................. 50

Figure 26 : Modem to Modem interconnection between two UFSBI on Voice channel of OFC ............ 50

Figure 27 : Connectivity between two modems through copper conductor of quad cable .................. 50

Figure 28 : Reset Box Front & Rear views ............................................................................................. 50

Figure 29: UFSBI Alarm Panel Front & Rear view .................................................................................. 52

Figure 30: Pattern of Address Configuration Jumpers .......................................................................... 53

Figure 31: BPAC Single Line Block Panel ............................................................................................... 58

Figure 32: Block Panel front view .......................................................................................................... 58

Figure 33: Block Panel front view .......................................................................................................... 59

Figure 34: BPAC Double Line Block Panel .............................................................................................. 59

Figure 35: Provision of EBLM in UFSBI application ............................................................................... 62

Figure 36 :Flowchart for Rectification of Communication link failure Deltron make UFSBI ................. 77

Figure 37: Block Proving with Single Section Digital Axle Counter & UFSBI for Single Line .................. 78

Figure 38 :Block Proving with Single Section Digital Axle Counter & UFSBI for Double Line ................ 80

xv

List of Tables

Table 1: BPAC (Block Panel & UFSBI) RDSO/SPN/188/2004 4

Table 2: Description of Relays for BPAC with UFSBI on Single Line 11

Table 3: Description of Relays for BPAC with UFSBI on Double Line 14

Table 4: Fault codes of Webfil UFSBI 27

Table 13: Colour scheme of PE insulated Quads 34

Table 5: Inputs & Outputs of DC-DC Converter 44

Table 6:Block Proving with Axle Counter : Relay disposition for Single Line 54

Table 7:Block Proving with Axle Counter : Relay disposition for Double Line 54

Table 8: Relays Description 55

Table 9 : Single Line Block Panel Indications & Controls 58

Table 10: Double Line Block Panel Indications & Controls 60

Table 11: Maintenance Schedule for UFSBI 64

Table 12: Error code list & Recommended actions for Block Working With UFSBI & DAC(Deltron) in

case of Faults/ Errors 67

Table of Contents

CAMTECH/S/PROJ/2020-21/SP11/1.0 1

Block Proving By Axle Counter using UFSBI March 2021

Chapter I

Universal Fail Safe Block Interface (UFSBI)

1.1 Introduction

Universal Fail Safe Block Interface (UFSBI) is used as a Block Interface to Conventional

Block Instruments. UFSBI conforms to IRS specification No.S104/2012. It has wide

applications as a 16 I/O Fail-Safe MUX to reduce the dependency on copper conductors.

UFSBI is a 2 out of 3 fail-safe (SIL-4) multiplexer capable of exchanging 16 relay states

simultaneously over each direction between two locations separated by a distance but

connected over Quad -Cable, OFC or Radio.

System description The UFSBI system acts as multiplexer for communicating the commands from one

block panel to other in a fail safe manner to transfer block instrument signals (DC and

analog FM signals converted to status) to the other end. The communication is in full

duplex mode. The medium of communication is digital channels of Optical fiber,

Copper cable or Microwave radio (Through RS232 Serial Port). The MUX with its

accessories, Interlocking relays and power supply are housed in a cubicle called UFSBI

cubicle. .

Salient features

(a). The equipment is capable of driving safety signalling relays conforming to

specification BRS:930 (Q series relays).

(b). The equipment is capable of working on Quad cable as per TC 30/97 as well as

Voice/Data Channel provided over Optical Fibre. The coding of signal

transmission takes care of types of noise generally encountered in the transmission

system and ensures safety of operation.

(c). Each equipment in the section has a unique address, which can be set through

back-panel jumpers.

(d). The information exchanged between the pair of the interface equipment

contains the source & destination address.



(e). Wrongly addressed information packets are promptly rejected by the system and

frequent receipt of such packets is detected as link failure by the system.

(f). The telephone will work on a separate voice channel.

(g). The system works on 24V DC + 20% - 10%.

(h). A push button is provided for resetting UFSBI inside the cubicle on a reset box.

The resetting system is provided with a veeder counter to count the number of reset

action.

Applications of UFSBI

The various applications of UFSBI as approved by RDSO are given below:-

1. As a Fail-safe Signal Interface for the following Block Instruments to work on OFC /

Microwave.

(i). SGE Double Line Block Instrument.

(ii). NEALS Ball Token (NBT) single Line Block Instrument

(iii). DIODO TLBI Single Line Block Instrument

(iv). Token Less Push Button type Block Instrument.

2. As a Fail-safe Mux in Block Proving with Axle Counter (As Per IRS S:105/2012).

3. As a 16 I/O MUX used for relay state transfer in ABS / IBS / Gate / Slot transfer

application to reduce the number of copper conductors.

1.2 Block Proving By Axle Counter (BPAC) using UFSBI

Block Proving with Axle Counter Using UFSBI conforms to specification IRS S: 105/2012.

In this application, the UFSBI is an integral part of the Block Instrument.

The number of UFSBI I/O used for this application is 7.

Salient features It is a non-co-operative, user-friendly push button type Block Instrument capable of

providing the last vehicle detection in both single & double line sections.

The Block Panel provided, offers audio-visual indications for all vital information.

The interlocking circuits and input/output through Q-series relays provide galvanic

isolation, making the system suitable in both RE & Non- RE sections.

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The system is media independent i.e. it works on Copper cable, OFC or microwave

without hampering the fail-safety of the operation.

The system is triple modular redundant which means increase in availability. This

system also holds the final status using latch relays so that during Power supply or any

failure it remains in last operating state.

The total system (Including UFSBI, Axle Counter and Telephone) can work on Dark

Fibre also. 3 cores (out of 24 Cores) are needed for Single Line and 4 cores for double

line Block operation. Hence it requires no STM or Primary Multiplexers.

Uses Axle Counter for Block Occupied / Free verification & Last Vehicle Check.

Working principle

The trains are worked on Absolute Block system.

Each block section is provided with an Axle Counter to verify the occupation or

clearance of block section and indicated on Block Panel.

It is not possible to take Last Stop Signal to ‘OFF’ unless “LINE CLEAR” has been

obtained from the station in advance.

It is not possible to take “LINE CLEAR” unless block section and an adequate

distance beyond first stop signal of station in advance is clear of trains.

The Last Stop Signal assumes ‘ON’ aspect automatically on entry of train into block

section and retains this ‘ON’ position, till a fresh “LINE CLEAR” is obtained.

Block section automatically shows “TRAIN ON LINE” on block panel when a train

enters into the block section on “LINE CLEAR”.

Audio – Visual alarms for Train entry/exit, to/ from block section are provided and

are to be acknowledged.

“LINE CLOSE” feature is automatic after complete arrival of train.

“LINE CLEAR” cannot be taken without taking consent of receiving station.

“LINE CLEAR” cancellation is Co-operative.



Table 1: BPAC (Block Panel & UFSBI) RDSO/SPN/188/2004

BPAC (BLOCK PANEL & UFSBI) RDSO/SPN/188/2004

BLOCK OPERATION Push Button Type

BLOCK MEDIA Copper 6-Quad Cable / Voice channel of P-Mux /

Microwave / E1/ Dark Fibre

BLOCK COMMUNICATION Fail-safe Digital Communication at 2400 bps.

Optional Media fall-back with Auto Media C/O

BLOCK LENGTH

Upto 25 Km (typically) on 6Q-Cable

Upto 50 Km typically on OFC

Upto 30 Km typically on mW Radio

RE COMPATIBILITY Workable in RE area

TIME FOR TAKING LINE

CLEAR, TOL & LINE CLOSE 1-2 sec. (max.)

LAST VEHICLE VERIFICATION

& LINE CLOSE Automatic (Auto TOL & Auto Line Close)

OPERATOR INVOLVEMENT

PER TRAIN MOVEMENT Only once ( for taking Line Clear)

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Chapter II


UFSBI –Webfil Make

2.1 Introduction

Webil make BPAC using UFSBI consists of Triple redundant hardware at all levels with

2/3 decision logic for safety and availability. All input-output connections are optically

and/or galvanically isolated to eliminate ground noise and earth faults. It consists of 16-

digit dot-matrix alpha-numeric display for user friendly man-machine interface.

2.2 Sub systems of BPAC with UFSBI

The system is a Block Proving system and it works with other subsystems mentioned

below:

(i) Universal Fail Safe Block Interface

(ii) Block Panel

(iii) Single section Digital Axle Counter

(iv) Block Telephone

(v) Quad Cable or Voice channel on OFC

(vi) Battery Set

(vii) Battery Charger / IPS module

(viii) Relay rack with relays

2.3 Salient features

The BPAC is of 2 out of 3 hardware architecture with implementations of the fail safety

principles. It complies with the CENELEC standards and conforming to Safety Integrity

Level - 4 (SIL-4).

The system incorporates auto features and eliminates manual co-operations from other end

for

(i). Line Clear operation.

(ii). Emergency cancellation at the receiving station.

(iii). Automatic Train On Line.

(iv). Automatic Line Close after sequence proved at receiving end.

(v). Simplified Block Back / Block Forward Operations.

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(vi). Cooperative Cancellation.

(vii). Line Clear Blocking Key (LCB Key) to prevent automatic granting of

Line Clear.

(viii). Station Master Key (SM Key) to prevent unauthorized panel operations.

(ix). Data logger connectivity.

(x). Communication media: (1 pair cable in quad or on voice channel in

OFC.

(xi). Block bell and telephone on separate pair of quad or voice channel of

OFC.

2.4 UFSBI Cubicle

The UFSBI cubicle consists of following modules:

Alarm Extender Module

Display & Reset Panel

Power Supply unit -2 Nos.

Communication Driver -1 No.

System Module – 3 Nos. (Sys A, Sys B, Sys C)

Relay Input Module -2 Nos. (I/P A, I/P B)

Relay Feedback Module-2 Nos. (F/P A, F/P B)

Relay Output Module-2 Nos. (O/P A, O/P B)

Sealing arrangement with double locking is provided at the back door of the panel.

Faceplate of the Block Panel is covered with transparent acrylic sheet of 4mm thickness.

Front views of UFSBI Panels for Single Line and Double Line are given on next page:

Figure 1 & Figure 2



Figure 1: Front view of Webfil UFSBI cubicle for Single Line

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Figure 2: Front view of Webfil UFSBI Equipment for Double Line



2.5 Cable requirements

Quad Cable or Voice channel

For Single Line:

SSDAC of Station A to SSDAC of Station B – Voice Channel 2 wire in OFC or

½ quad

Digital MUX UFSBI of Station A to Digital MUX of Station B – Voice Channel

4 wire in OFC or 1 quad.

For Telephone communication from Station A to Station B - Voice Channel 2

wire in OFC or ½ quad

Hence total requirement - 2 quad or 3 voice channels (1 no. 4 wire & 2 nos. 2 wire) in

OFC

For Double Line:

DN SSDAC of Station A to DN SSDAC of Station B – Voice Channel 2 wire in

OFC or ½ quad

UP SSDAC of Station A to UP SSDAC of Station B – Voice Channel 2 wire in

OFC or ½ quad

Digital MUX UFSBI of Station A to Digital MUX of Station B – Voice Channel 4

wire in OFC or 1 quad.

For Telephone communication from Station A to Station B - Voice Channel 2 wire

in OFC or ½ quad

Hence total requirement - 2 ½ quad or 4 voice channels (1 no. 4 wire & 3 nos. 2 wire) in

OFC

Specification:

Cables shall be as per specification TC 30/97 or latest.

S/N ratio: At least 20dB

Attenuation 0-3dB (at 1 KHz )

For connecting BPAC to the optical mux

0.9mm / 600 ohms telephone cable without joints.

56/0.3mm copper wire for power input.

(Length as per distance between battery charger or IPS room to BPAC cubicle.)

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2.6 Power Supply arrangement

There should be

Separate power supply for Block Panel, UFSBI & relays

Separate power supply for Digital Axle Counter

Separate power supply for Block Telephone

Battery Set

The Block Proving with Axle Counter system comprising of Block Panel, Universal Fail

Safe Block Interface and the relays work on 24 V D.C. with a maximum current

consumption of 5A.

Good quality 24V 80AH battery with low internal resistance should be used for BPAC.

BPAC battery should not be shared with any other gear or any other adjacent BPAC. Battery

Voltage should not exceed the range: 21.6 to 28.8V DC.

Battery Charger / Module of IPS

The charger will be as per IRS S-86 / 2000 to cater 5A/24V DC load.

The IPS module as per RDSO SPN 165/2004 to cater 5A/24V DC load. Normal voltage:

24V/5A (-10% to + 20%) at the output voltage at following 2 condition must be within

21.6V to 28.8V.

Charger ON & BPAC ON.

Charger OFF (for 15 min) & BPAC ON.

(Note: The output voltage must be measured at the terminals of DC-DC converter input).

2.7 Relay Rack & Signalling Relays

All the relays used as per the circuit diagram are of RDSO approved make. Relay rack is

housed inside the same UFSBI cabinet. The Electronic Fail Safe Timer (IRS: S

61/2000) is micro controller based. Description of Relays is given on next page.



Table 2: Description of Relays for BPAC with UFSBI on Single Line

Sr

No.

Relay

Type of Relay and

normal status

Description

01

TGTR

QL1 (11F,4B)

DROP

TRAIN GOING TO Relay.

Operates to pick up on receipt of LINE CLEAR at

train sending station.

Normalizes when station in advance sets to

LINECLOSED after train arrival or cancellation of LINE CLEAR.

02

TCFR

QL1 (11F,4B)

DROP

TRAIN COMING FROM Relay. Operates to pick up on receipt of LINE CLEAR

enquiry from train sending station. Normalizes after complete train arrival or cancellation of LINE CLEAR.

03

ASCR

QN1 (8F,8B)

DROP

ADVANCE STARTER SIGNAL

CONTROL Relay.

Picks up when LINE CLEAR is available and

necessary controls corresponding to the operation

are reversed by the SM.

Drops if either entry of Train in Block Section or withdrawal of any SM control.

04

TGTXR

QN1 (8F,8B)

DROP

TRAIN GOING TO CODE Relay.

Picks up at train sending station pressing of buttons

for LINE CLEAR enquiry.

Drops when train sending station releases button of

LINE CLEAR enquiry or picking up of TGTR whichever is earlier.

05

TCFXR

QN1 (8F,8B)

DROP

TRAIN COMING FROM CODE

RECEIVE Relay.

Picks up on receipt of LINE CLEAR enquiry

from train sending station.

Drops when station in rear releases Buttons for

LINE CLEAR enquiry or TGTR picks up

whichever is earlier.

06

TGTYR

QN1 (8F,8B)

DROP

TRAIN GOING TO CODE

RECEIVE

Relay.

Picks up on receipt of LINE CLEAR at train

sending station. Drops if either entry of train in Block Section or cancellation of LINE CLEAR.

07

120 JPR QN1 (8F,8B)

DROP

TIMER MATURE REPEATER Relay. Picks up on maturity of Timer for cancellation.

Drops when Block status set to LINE CLOSED.

08

BPNR QN1 (8F,8B)

DROP

BELL PUSH BUTTON Relay. Picks up on pressing of BELL push button with SM’s key IN, else drops.

09

TGTNR QN1 (8F,8B)

DROP

TRAIN GOING TO BUTTON Relay. Picks up on pressing of TRAIN GOING TO push button else drops.

10

CNR QN1 (8F,8B)

DROP

CANCEL BUTTON Relay. Picks up on pressing of CANCEL push button else drops.

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Sr

No.

Relay

Type of Relay and

normal status

Description

11 FR1 QN1 (8F,8B)

DROP FLASH CONTROLLER Relay No.1

12 FR2 QN1 (8F,8B)


13

TAR 1

QNA1 (8F,8B)

DROP

TRAIN ARRIVAL FIRST Relay.

Picks up when control of Reception Signal is

Reverse and HSAT occupied by train and HSBT

clear. Drops when AT clear with a delay.

14

TAR 2

QN1 (8F,8B)

DROP

TRAIN ARRIVAL SECOND Relay.

Picks up when control on Reception Signal is

Reverse and HSAT clear and HSBT occupied by

the train. Drops when block status set to LINE CLOSED.

15

CAR

QN1 (8F,8B)

DROP

CANCEL Relay.

Picks up at train Receiving station on initiation of

cancellation provided all controls pertaining to

Advance Starter and Reception Signal/Signals & Signals controlled by them are at Normal at both the stations.

16

BTSR

QN1 (8F,8B)

PICK UP

BLOCK TRACK STICK Relay.

Picks up when Block status is LINE CLOSED and

Block track is clear. Drops in any of the under-mentioned cases…

(a) Entry of train in Block Section. (b) Cancellation.

17

AZTR

QNA1 (8F,8B)

PICK UP

BLOCK SECTION TRACK Relay of Dispatch Line.

Drops in the under mentioned case:-

(a) Entry of train in the Block Section (b) Failure of Axle Counter.

18

TGTZR

QN1 (8F,8B)

PICK UP

ADVANCE STARTER

SIGNAL NORMAL

CHECKING REPEATER Relay. Picks up to repeat LINE CLOSED condition at train

receiving station after arrival of train or after a LINE CLEAR cancellation has been initiated, else drops.

19

120 EJ

Electronic Time

Delay unit (Fail Safe)

Timer unit for cancellation time of 120 seconds.

20

HSATPR

QNA1 (8F,8B)

PICK UP

FIRST TRACK FOR DIRECTION

PROVING REPEATER Relay. Picks up when HSAT Track circuit is vacant else drops.

21

HSBTPR

QNA1 (8F,8B)

PICK UP

SECOND TRACK FOR DIRECTION

PROVING REPEATER Relay.

Picks up when HSBT Track circuit is vacant else drops.



Sr

No.

Relay

Type of Relay and

normal status

Description

22

ASGNCR

QNA1 (8F,8B)

PICK UP


NORMAL CHECKING Relay.

Picks up when Advance Starter Signal and all its controls are NORMAL, else DROP.

23

HSGNCR

QNA1 (8F,8B)

PICK UP

RECEPTION SIGNAL NORMAL

CHECKING Relay. Picks up when reception signal/signals and all its controls are at Normal else drop.

24

TCFCR

QN1 (8F,8B)

PICK UP

TRAIN COMING FROM CANCEL

Relay.- Picks up at receiving station when

CANCEL CO OP button is pressed at sending

station else drops.

25

TCFZR

QN1 (8F,8B)

PICK UP

TRAIN COMING FROM normal proving

relay.-Picks up at receiving station when TCFR

drops else drops.

26

TGTPR QN1 (8F,8B)

PICK UP

TRAIN GOING TO normal proving relay. Picks

up at sending station when TGTR drops else drops.

27

SHKR QN1 (8F,8B)

PICK UP

SHUNT KEY INDICATING relay. Picks up when key of EKT is ‘IN’ & shunt Release key is ‘OUT’, else drops.

28

ASGNCPR

QN1 (8F,8B)

PICK UP

ADVANCE STARTER SIGNAL NORMAL

CHECKING Relay (for other station).

Picks up when Advance Starter Signal and all its

controls are NORMAL at the other station, else

DROPS.

29 BLR QN1 (8F,8B)

DROP

BELL Relay. Picks up when other station presses the Bell

Button.

30 SD1 QN1 (8F,8B)

TOGGLE

SHUT DOWN Relay 1.

UFSBI health check Relay.

31 SD2 QN1 (8F,8B) TOGGLE

SHUT DOWN Relay 2. UFSBI health check Relay.

32 WD QN1 (8F,8B) PICK UP

WATCH DOG Relay. Refreshes system S/W after every 2 hrs.

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Table 3: Description of Relays for BPAC with UFSBI on Double Line

Sr

No.

Relay

Type of Relay and

normal status

Description

01

WD QN1

(8F,8B)

PICK UP

WATCH DOG Relay. Refreshes system S/W after every 2 hrs if all inputs

and outputs are de-energised.

02

TGTXR

QN1

(8F,8B)

DROP

TRAIN GOING TO CODE Relay.

Picks up at train sending station pressing of buttons for

LINE CLEAR enquiry.

Drops when train sending station releases

button of LINE CLEAR enquiry or picking up of

TGTR whichever is earlier.

03

ASGNCR

QNA1

(8F,8B)

PICK UP

ADVANCE STARTER SIGNAL NORMAL

CHECKING Relay.

Picks up when Advance Starter Signal and all its controls are NORMAL, else DROP.

04

TCFR

QL1

(11F,4B)

DROP

TRAIN COMING FROM Relay. Operates to pick up on receipt of LINE CLEAR enquiry

from train sending station.

Normalizes after complete train arrival or cancellation of LINE CLEAR.

05

HSGNCR

QNA1

(8F,8B)

PICK UP

RECEPTION SIGNAL NORMAL

CHECKING Relay. Picks up when reception signal/signals and all its controls are at Normal else drop.

06

BPNR QN1

(8F,8B)

DROP

BELL PUSH BUTTON Relay. Picks up on pressing of BELL push button with SM’s

key IN, else drops.

07 FR1 QN1 (8F,8B)


08

SD1 QN1

(8F,8B)

TOGGLE

SHUT DOWN Relay 1.

UFSBI health check Relay.

09

TCFXR

QN1

(8F,8B)

DROP

TRAIN COMING FROM CODE

RECEIVE Relay.

Picks up on receipt of LINE CLEAR enquiry from


Drops when station in rear releases Buttons for LINE

CLEAR enquiry or TGTR picks up whichever is earlier.

10

TCFCR

QN1

(8F,8B)

PICK UP

TRAIN COMING FROM CANCEL Relay. Picks up at receiving station when CANCEL CO OP button is pressed at sending station else drops.

11

TGTYR

QN1

(8F,8B)

DROP

TRAIN GOING TO CODE RECEIVE

Relay.

Picks up on receipt of LINE CLEAR at train sending

station.

Drops if either entry of train in Block Section or cancellation of LINE CLEAR.



Sr

No.

Relay

Type of Relay and

normal status

Description

12

ASGNCPR

QN1

(8F,8B)

PICK UP


NORMAL CHECKING Relay (for other station).

Picks up when Advance Starter Signal and all

its controls are NORMAL at the other station, else

DROPS.

13

TGTZR

QN1

(8F,8B)

PICK UP


NORMAL CHECKING REPEATER Relay. Picks up to repeat LINE CLOSED condition at train

receiving station after arrival of train or after a LINE

CLEAR cancellation has been initiated, else drops.

14

BLR QN1

(8F,8B)

DROP

BELL Relay. Picks up when other station presses the Bell Button.

15 FR2 QN1 (8F,8B)


16 SD2 QN1 (8F,8B)

TOGGLE SHUT DOWN Relay 2. UFSBI health check Relay.

17

BTSR

QN1

(8F,8B)

PICK UP

BLOCK TRACK STICK Relay.

Picks up when Block status is LINE CLOSED and

Block track is clear.

Drops in any of the under-mentioned cases…

1. Entry of train in Block Section. 2. Cancellation of LINE CLEAR.

18

TAR 2

QN1

(8F,8B)

DROP

TRAIN ARRIVAL SECOND Relay.

Picks up when control on Reception Signal is Reverse

and HSAT clear and HSBT occupied by the train. Drops when block status set to LINE CLOSED.

19

TAR 1

QNA1

(8F,8B)

DROP

TRAIN ARRIVAL FIRST Relay. Picks up when control of Reception Signal is Reverse

and HSAT occupied by train and HSBT clear. Drops when AT clear with a delay.

20

HSBTPR

QNA1

(8F,8B)

PICK UP

SECOND TRACK FOR DIRECTION


Picks up when HSBT Track circuit is vacant else drops.

Table of Contents



Sr

No.

Relay

Type of Relay and

normal status

Description

21

HSATPR

QNA1(8F,8B)

PICK UP

FIRST TRACK FOR DIRECTION


Picks up when HSAT Track circuit is vacant else drops.

22

AZTR(D)

QNA1

(8F,8B)

PICK UP

BLOCK SECTION TRACK Relay for

dispatch line.

Drops in the under mentioned cases:-

1. Entry of train in the Block Section. 2. Axle Counter failure.

23

120 EJ

Electronic Time

Delay unit (Fail Safe)


24

120 JPR

QN1(8F,8B)

DROP

TIMER MATURE REPEATER Relay. Picks up on maturity of Timer for cancellation. Drops when Block status set to LINE CLOSED.

25

CAR

QN1(8F,8B)

DROP

CANCEL Relay. Picks up at train Receiving station on initiation of

cancellation provided all controls pertaining to Advance

Starter and Reception Signal/Signals & Signals

controlled by them are at Normal at both the stations.

26

CNR QN1 (8F,8B)

DROP

CANCEL BUTTON Relay. Picks up on pressing of CANCEL push button else

drops.

27

TGTNR QN1 (8F,8B)

DROP

TRAIN GOING TO BUTTON Relay. Picks up on pressing of TRAIN GOING TO push button

else drops.

28

ASCR

QN1 (8F,8B)

DROP


CONTROL Relay.

Picks up when LINE CLEAR is available and necessary

controls corresponding to the operation are reversed by

the SM.

Drops if either entry of Train in Block Section or withdrawal of any SM control.

29

TGTR

QL1 (11F,4B)

DROP

TRAIN GOING TO Relay. Operates to pick up on receipt of LINE CLEAR at train

sending station.

Normalizes when station in advance sets to LINE

CLOSED after train arrival or cancellation of LINE

CLEAR.

30

AZTR(R)

QNA1

(8F,8B)

PICK UP

BLOCK SECTION TRACK Relay for

receive line.

Drops in the under mentioned cases:- 1.Entry

of train in the Block Section 2. Axle Counter failure.



2.8 Description of Modules

(i) Power Supply Unit Module

Table of Contents

Functions

The power supply unit operates from isolated

24V supply

Each PSU has two separate switching power

supply modules ,one for +5V and the other for

+12V.

Input Under-voltage & Over-voltage alarm

Since two power supplies are in hot standby

mode, withdrawal of one PSU due to any

failure does not inhibit operation of the system.

Alarm Indications in PSU Module

BATT : Input Battery supply present

IP SHUT : Input Battery voltage goes beyond the

tolerable range

IP OV : Input Battery voltage goes beyond the

stipulated level but below the highest tolerable

range

IP UV : Input Battery voltage falls below stipulated

level

OK : Output voltage (5V/12V) within tolerable

range

SHUT : Output voltage (5V/12V) goes beyond the

tolerable range

UV : Output voltage (5V/12V) falls below the

tolerable range

Figure 3: Power

Supply Unit Module



(ii) System module

Figure 4: System Module

Functions

The System Module is based on high

performance 80C196KC microcontroller from

Intel

By virtue of the Inter-Processor Communication

(IPC) each of the processors is having status and

alarm information of the other two processors

and their I/O sub-system

Communication of Inter-Block data is carried out

through a built-in modem device

Alarm Indications in SYSTEM Module

ALM : Indicates any alarm in the Equipment

RMT : Indicates any alarm in the Remote Equipment

2/3 : System works in 2 out of 3 modes

SD : Processor goes to shut down state due to any

failure

SSB : System fails to receive valid packets from the

remote end

RSSB : Remote end system has gone to SSB state

LNK OK : Tx-Rx path is OK between the local end

UBX 2000 and the remote end

SYS OK : As long as there is no alarm in the system

PROC ACTV : Reflects the health of the System card

and its associated hardware in other cards



(iii) Communication Driver

Figure 5: Communication Driver

Functions

Drives hardware for operating the power

shutdown relay (SD1 & SD2) and watchdog

relay (WD) .

Global Reset hardware logic which will

initiate reset of all the three processors

Inter-Block Communication (IBC) is carried

out for voice channel interface

Alarm Indications in Communication Driver

Module

SYS ACTV: System works in 3/3 or 2/3 mode

TXA : Inter block transmission takes place

through System Module A at the local end

TXB : Inter block transmission takes place

through System Module B at the local end

TXC : Inter block transmission takes place

through System Module C at the local end

CNTL VOLT : Health of SD1 & SD2

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(iv) Relay Input Module

Functions

Accepts 8 external potential-free

changeover contacts

All the contacts are sensed

through opto-isolators

Status of each input is displayed

on the front panel through

LEDs

Alarm Indications in Relay Input

Module

GREEN : Input channel senses the

back contact of the input relay

AMBER : Input channel senses the

front contact of the input relay

Figure 6: Relay Input Module



(v) Relay Output Module

Functions

The Output Module drives 8 Q-

series safety relays.

Receives feedback of the output

status from various stages to

ensure the integrity of data .

Status of each Output is

displayed on the front panel

through LEDs

Alarm Indications in Relay output

Module

AMBER : Output relay activates, the

corresponding amber LED glows

DAG - A : System A is in

disagreement regarding the status of

the output relays

DAG - B : System B is in


the output relays

DAG - C : System C is in


the output relays

Figure 7: Relay Output Module

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(vi) Relay Feedback Module

(vi) Display and Reset Panel

Functional Description – Display Section

A 16 character alphanumeric display is used to prompt the various alarm conditions with

short mnemonics for easy understanding of the problem. The display part is fitted centrally in

the Display & Reset Panel below the Alarm Extender Module in the subrack and is common

for all the three processors. Normally the display will show “SYSTEM OK”. In case of any

alarm in the system a piezo buzzer is activated to draw the attention of the operating staff.

Functions

Same as the Input Module

except the hardwired

identity code for the feedback

module

Read the feedback of the

external relays connected to

the Relay Output Module.

Status of each Feedback is

displayed on the front panel

through LEDs

Alarm Indications in Relay

Feedback Module

GREEN : Senses the back

contact of an output relay

AMBER : Senses the font contact

of an output relay

Figure 8: Relay Feedback Module



Acknowledgement of alarm through “ACKN” key on the display panel stops the buzzer but

the alarm is still displayed on-line as long as it is continued. The display panel also

accommodates the veeder counter for registering external resets. Three green LED indicators

naming A, B, C indicate to which system card display is connected. B y pressing the SYS

key this connectivity can be changed. Being the “RMT” key pressed, pressing the “ACKN”

key the status of the remote end can be viewed when communication link between local end

& remote end is OK. Otherwise “RMT:STAT UNKNOWN” will be displayed.

Figure 9: Display & Reset Panel front view

Functional Description – Reset Section

When initially power is applied to the system,

(1). The count no. of veeder counter will increase by one as soon as the system passes

through Power on Reset.

(2). The system goes through some initial self checking showing ‘SYSTEM CHECK’. If any

of the checks fails system goes to shutdown. Now the system comes to a point where it

looks for control voltage of the output card showing ‘CNTL. VOLT ABSENT’. When

“CNTL VOLT” switch is pressed momentarily, desired voltage gets available, otherwise

system goes to shutdown. Now the system will transit to SSB state, assuming failure of

inter block communication and will display the message “IB RX FAIL”. When the

system at the other end is also powered ON, the local end system will transit to the

normal state after successful reception of at least three interblock communication packets

and will display the message “SYSTEM OK”.

Procedure – Reset Operation

To Reset and bring the BPAC into operation, follow the following steps:-

Press the “RESET” switch.

Note that the veeder counter value in the panel increase by one.

Wait till the UFSBI completes initial self checking showing “SYSTEM CHECK”.

Table of Contents



If UFSBI detects any fault during initial self checking system will go to

shut down, giving respective alarm.

Otherwise, at the end of successful self checking, when the display shows

“CNTL VOLT ABSENT”, press the “CNTL VOLT” switch.

If everything is OK, the UFSBI will display “SYSTEM OK”.

Alarm Extender Module

Figure 10: Alarm Extender Module front view

Functional Description of Alarm Extender Module

Processes & annunciates various alarm conditions Provides additional amplification to

combat 30dB attenuation.

Checks both the local and remote loopback. It also comprises a RS232-c port which is

provided for directly connecting to low speed data channel on OFC .

Depending on the various alarm conditions, corresponding relays, whose NO & NC contacts

are made available through a tag block for extension to SM’s panel & data- logger, are

picked up.

The Alarm Extender Module has the facility to check both the local and remote loopback. It

also comprises a RS232-c port which is provided for directly connecting to low speed data

channel on OFC / Microwave Radio.

The Alarm Extender is based on high performance 80C196KC microcontroller

from Intel. The module has three functional sections for its operation-

The alarm processing section – Processes & annunciates various alarm conditions.

The amplifier section – Provides additional amplification to combat 30dB

attenuation.

The power supply section – To drive internal circuitry.



Alarm Indications in ALARM EXTENDER Module

SYS FAIL (SINGLE) : Indicates that the system works in 2 out of 3 mode

PSU-FAIL (SINGLE) : Indicates that any one of the two power supply unit goes into

shutdown condition

LINK-FAIL : Problem occurs in the communication link between the local end and remote

end

SYS-FAIL (SD) : Indicates that the UFSBI has gone into SD State.

PSU-FAIL (SD) : Indicates that both the power supply units go into shutdown condition

resulting in SD mode of the UFSBI

UFSBI-OK : Indicates that the Equipment is in OK condition.

CNTL.-VOLT. : Indicates absence of Control voltage.

ALMOD-OK : Indicates health of the Alarm Extender Module is OK.

LOOP BACK ENABLE : Indicates the system is loopbacked

(vii) Alarm Panel for SM

Figure 11: Alarm Panel for SM

Table of Contents



Functional Description of Alarm Panel for SM

The functionality of the UFSBI Alarm Panel is to indicate proper alarm to draw attention of

the SM to enable him to understand the health of UFSBI, which is located at a distance &

take necessary action. Whenever any alarm condition takes place in UFSBI, alarm extender

module picks up certain relays, whose dry contacts are used to extend driving voltages for the

alarm LEDs in the panel based on the UFSBI status & alarm relay to enable buzzer, which

stops after pressing the acknowledgement switch.

Alarm Indications in ALARM Panel for SM

1PSU

This is an amber LED. Under normal operating condition, this LED is OFF. When this

LED glows, it indicates that any one of the two power supply unit goes into shutdown

condition.

1SYS

This is an amber LED. Under normal operating condition, this LED is OFF. When this

LED glows, it indicates that the system works in 2 out of 3 modes.

2PSU

This is a red LED. Under normal operating condition, this LED is OFF. . When this LED

glows, it indicates that both the power supply units go into shutdown condition resulting in

SD state of UFSBI.

2SYS

This is a red LED. Under normal operating condition, this LED is OFF. When this LED

glows, it indicates that the UFSBI has gone into SD State.

LINK

This is a red LED. Under normal operating condition, this LED is OFF. If any problem

occurs in the communication link between the local end and remote end of UFSBI, this will

glow.

ALMOD

This is a red LED. Under normal operating condition, this LED is OFF confirming that the

health of the Alarm Extender Module is OK. This LED becomes ON when Alarm Extender

Module goes faulty.

UFSBI

This is a bicoloured LED. Under normal operating condition, this LED is green. When any

alarm appears in UFSBI due to any reason, internal or external, this LED becomes red.



2.9 Troubleshooting through Alarm display

A 16 character alphanumeric display is used to prompt the various alarm conditions with

short mnemonics for easy understanding of the problem.

As long as no failure occurs in the system, the display remains “SYSTEM OK”. But if any

failure occurs then the buzzer will start beeping and the summarised alarm will come in the

display in the form “MAJOR: X MINOR: Y”, where X & Y are integers. The operator /

maintainer will then have to press the ACKN switch to see the alarm status. As soon as the

ACKN switch is pressed, the buzzer will stop beeping and the relevant faulty message

information will be displayed

Alarm display during fault conditions

Three LED indicators naming A, B, C indicate to which system module display is connected.

By pressing the SYS switch the connectivity of the display panel to the particular system

module A, B, C can be selected.

Different alarms in the system normally displayed as ‘alpha numeric’ characters in the

Display Panel during a faulty condition are given along with their corrective action in the

tabular form below:

Nomenclature: SD = Shutdown SSB = Safe standby NML = Normal

Table 4: Fault codes of Webfil UFSBI Alarm Display Alarm type Reason Corrective Action

*INPUT X

FAULTY

(X = 1, 2 ... , 16)

Major : SD Both front & back contacts of

I/P relay either open or shorted.

Check the connectivity of the

complementary contacts of

respective input relay.

*IP-X NO

MATCH

(X = 1, 2 ... , 16)

Major : SD Self input data different from

both adjacent processors.

Reset UFSBI, if not retrieved

into OK condition, change the

respective I/P card.

*OUTPUT X

FAULTY

(X = 1, 2 ... , 16)

Major : SD Both front & back contacts of

OP relay either open or shorted.

Final valid latch data different

from OP relay status.


into OK condition, then check

contacts of the respective

output relay, otherwise change

the respective O/P FEEDBACK

card.

*OP-X NO

MATCH

(X = 1, 2 ... , 16)

Major : SD Self latch data different from




respective O/P card.

Table of Contents



Alarm Display Alarm type Reason Corrective Action

*SPO X

FAULTY

(X = 1, 2 ... , 16)

Major : SD Relay driver feedback wrong.

Final valid latch data different

from relay driver status.




*INPUT-A

FAULTY

Major : SD Input card signature invalid.

Self input data valid but

different from adjacent

processors.




*OUTPUT-A

FAULTY

Major : SD Output card signature invalid. Reset UFSBI, if not retrieved



*FEEDBACK-

A FLTY

Major : SD Feedback card signature

invalid.

Self feedback data valid but


processors.



respective O/P FEEDBACK

card.

*INPUT-B

FAULTY

Major : SD Input card signature invalid.

Self input data valid but


processors.




*OUTPUT-B

FAULTY

Major : SD Output card signature invalid. Reset UFSBI, if not retrieved



*FEEDBACK-

B FLTY

Major : SD Feedback card signature

invalid. Self feedback data valid

but different from adjacent

processors.



respective O/P FEEDBACK

card.

*ROM

FAULTY

Major : SD Computed ROM checksum

different from that of stored

value.



respective SYSTEM card(s).

*RAM

FAULTY

Major : SD Test pattern written to a

particular RAM location is

different from that of read-back

value.




*TIMER

ERROR

Major : SD Timer 2 value not within

tolerable range.




*TASK

ERROR

Major : SD Five ms. task / second task if

not executed properly.




*PROC ID

ERR

Major : SD Identity & inverted identity

mismatch.

Identity read different from that

of stored value.







*BP BUS

FAULTY

Major : SD Stuck at fault at either I/O

address lines or data lines or

control lines.


into OK condition, check the

Euro connector of respective

System card and

BACKPLANE. If these are OK

then problem is with System

card or Backplane. Change one

by one to identify the faulty

card. Replace that and rectify

the system.

*ADDR

SETUP ERR

Major : SD Difference between local &

remote address not equal to 5.

Self address setting different

from adjacent values.

Check the proper value of

hardware ADDRESS at

BACKPLANE otherwise

change the BACKPLANE.

*PROCESSING

ERR

Major : SD Normal input & complemented

input mismatch.

Data corruption (00 or 11)

while processing.

Software timer counters beyond

limit.


into OK condition, Change the


*I/O CONFIG

WRONG

Major : SD I/O configuration of local &

remote systems different.

Configuration of I/O modules at

the local end faulty.

Configure I/O cards properly in

the respective I/O slots of

UFSBI subrack.

*OUTPUT

DISAGREE

Major : SD Self output data different from


Reset UFSBI, if it is not

retrieved into OK condition,

check whether any “SD” alarm

of System card exists. If found

replace the System card

otherwise replace the O/P card.

CNTL. VOLT

ABSENT

Major : SD Switched voltage at the output

card not available.


into OK condition, measure

switched voltage (12V) at

TB18A of BACKPLANE.

*MODE

MISMATCH

Major : SD Processor mode different from



into OK condition, Change the


*TABLE

CKSM ERR

Major : SD Computed majority voter table

checksum different from that of

stored value.


into OK condition, replace the


*SD WD HW

FAULT

Major : SD Feedback from various stages

of shutdown and watchdog

hardware different from the

desired status.


into OK condition, check SD1,

SD2 & WD relays and their

respective connections, if not

yet retrieved, replace the

Communication Driver card

Table of Contents




*FAULT IN SD

H/W

Major : SD Feedback from various stages

of shutdown hardware different

from the desired status.


into OK condition, check SD1

& SD2 relays and their

respective connections, if not

yet retrieved, replace the

Communication Driver card

*STACK

ERROR

Major : SD Stack pointer not remain in its

original position due to some

software failure.




*CPU ERROR Major : SD Instruction execution of CPU

wrong.




*INPUT-A

ABSENT

Major : SD Input card pulled out from the

slot during operation.

Insert the card into the

respective slot properly and

reset UFSBI.

*INPUT-B

ABSENT

Major : SD Input card pulled out from the




reset UFSBI.

*OUTPUT-A

ABSENT

Major : SD Output card pulled out from the




reset UFSBI.

*OUTPUT-B

ABSENT

Major : SD Output card pulled out from the




reset UFSBI.

*FEEDBK-A

ABSENT

Major : SD Feedback card pulled out from

the slot during operation.



reset UFSBI.

*FEEDBK-B

ABSENT

Major : SD Feedback card pulled out from

the slot during operation.



reset UFSBI.

*IBC RX FAIL Major : SSB Non receipt of three successive

interblock packets.

If remote UFSBI is in OK

condition then check the

communication link.

*IB ADDR

MISMACH

Major : SSB Address of local & remote

systems different for three

successive interblock packets.

Check the proper value of

hardware ADDRESS at

BACKPLANE for local and

remote, otherwise change the

BACKPLANE.

*IBC PKT

MISMACH

Major : SD No match in all three sub

packets for three successive

frames.

Reset UFSBI




*IBC TX FAIL Major : SD Protocol of IBC Trans

Feedback frame wrong.

Trans Feedback not available.




*BOTH IPC

RXFL

Major : SD Non availability of IPC packets

from both adjacent processors.




*IPC TX FAIL Major : SD Receipt of IPC RXFL alarm

from both adjacent processors.




*PROC ACTV

FAIL

Major : SD Processor Activity signal in

inactive state (logic high).

During power on the software

would check for both logic high

& low status of Processor

Activity signal. In case of

anomaly, this alarm would be

raised.




*PROC ID

ERR

Major : SD System Activity signal in

inactive state (logic high).




*FALSE

INTERRUPT

Major : SD Invoking of any undesired

interrupt.




PROC-A

INACTIVE

Minor :

NML

If A system goes to SD due to

any reason, the other two

processors would raise this

alarm.



respective SYSTEM card.

PROC-B

INACTIVE

Minor :

NML

If B system goes to SD due to



alarm.




PROC-C

INACTIVE

Minor :

NML

If C system goes to SD due to



alarm.




IBC PACKET

2/3

Minor:

NML

One of three sub packets of a

frame does not match with

other two for three successive

frames.




PROC-X IPC

RXFL

(X = A,B,C)

Minor :

NML

If a system card goes to SD due

to any reason, the other two


alarm.

Check if other system card(s)

are in OK or shutdown state. If

so, reset UFSBI, if not retrieved


SYSTEM card(s) one by one to

identify the faulty one. Replace

the identified faulty one and

restore the system.

Table of Contents




PROC-B IPC

RXFL

Minor :

NML

If B system goes to SD due to



alarm.



SYSTEM –B card.

PROC-C IPC

RXFL

Minor :

NML

If C system goes to SD due to



alarm.



SYSTEM –C card.

PSU-A O/P

ERROR

Minor :

NML

Output of PSU A alarming but

PSU-B OK.

Replace PSU-A card.

PSU-B O/P

ERROR

Minor :

NML

Output of PSU B alarming but

PSU A OK.

Replace PSU-B card.

BAT BEYOND

LIMIT

Minor :

NML

Battery voltage exceeds its

lower or upper limit.

Check and correct Battery,

Charger or IPS.

2.10 Do’s & Don’ts

Do’s Trained and knowledgeable persons should operate & maintain the BPAC.

Battery voltage for BPAC should be checked periodically. It should be within the operating

range (21.6V – 28.8V).

Connectors or Modules should be plugged / unplugged after switching off the Power

Supply.

Replacements of modules should be done with proper spares supplied by the

manufacturer.

Arbitrary or stray earthing connections are to be avoided. Periodic checking of earthing

connection is recommended.

Modules are to be inserted with proper alignment and with reasonable pressure to ensure that

no damage to the connector pins occur.

In case of any alarm, all the processors alarm conditions are to be recorded for proper

analysis and remedial measures.

Don’ts

1. The system should not be ‘RESET’ in case of link failure.

2. Relay testing should not be performed involving found ‘PICK

UP’ or ‘DROP’ in on-line condition.



Annexure I – Details of Quad Cable Connection

Table of Contents



Quadding arrangement of cable

Table 5: Colour scheme of PE insulated Quads

Quad

Colour

Quad

Number

Colour of Conductor Insulation

‘A’

wire ‘B’ wire ‘C’ wire ‘D’ wire

Orange 1 White Orange Red Grey

Blue 2 White Blue Red Grey

Brown 3 White Brown Red Grey

Green 4 White Green Red Grey

Yellow 5 White Yellow Red Grey

Bla ck 6 White Black Red Grey

Wire ‘ A’ & ‘B’ shall form a pair and ‘C’ & ‘D’ shall form another pair of quad

colour.

Precautions to be taken during wiring / connections of Axle Counter systems during

Installation or maintenance

In a quad of ea ch colour, the designated pair of quad (mentioned in

Table I) should be used for circuits.

‘ A’ wire & ‘B’ wire : Pair 1 of each colour of quad

‘C’ wire & ‘D’ wire : Pair 2 of each colour of quad

No parallel signalling / other cable should be connected to the quad c able for the

circuit operation

If any wire of the pair of quad is broken / no n-functional, then use fresh pair of

other quad colour

Do not make the two different wires of different quad pairs (colour) for making a

pair to run a circuit operational.



Figure 12: Block level interconnection diagram (Single Line)



Figure 13: Block Level interconnection diagram Double Line

Table of Contents



Annexure II

Pre installation check-list for BPAC (As per IRS:S 105/2012 Ver. 0) Site Requirement details (To be provided by Railways for installation of BPAC)

Station Name:

Railway: Division: Section:

BPAC working between stations: &

Communication Medium/Type: OFC/Microwave/Quad Cable:

Sl.

N

o .

Description Specified Value/

Nos.

Remarks

1. Site condition Spacious, clean, dry, well ventilated room preferably with a fan/exhaust fan with adequate space for installation of BPAC.

2. Battery 24 V / 120 AH 3. Battery charger i) Good quality low ripple battery charger (Axle counter

type) 24V/10A as per IRS: S-86/2000 or IPS module

(24V/5A) as per RDSO/SPN/165/2004 for each BPAC. ii) Power supply for BPAC should be separate from Axle

Counter and Block telephone power supply.

4. Earthing i) Provision for separate earth pit (preferable) ii) Value of Earth resistance:< 2 Ω

5. Lightning arrestor Good lightning protection system with proper connection with earth.

6. Communication

channel

4 wire Voice Channel on OFC Jelly Filled Quad Cable (1 Quad) as per IRS TC 30-05

S/N ratio: At least 20dB Attenuation 0-3dB (at 1 KHz )

7. Cables Indoor Cable of 0.6 / 0.9 mm diameter will suffice the requirement of picking up I/P or O/P relays.

No. of core requirement will be decided as per no. of I/P

and O/P at Station. 56/0.3mm copper wire for power input (Length is as per

distance between battery charger or IPS room to BPAC cubicle.)

8. External terminals

(Centre Link Open

type)

No. of terminals required at CTR will be as per

requirement at station.

9. V/F matching

transformer (as

per communication

cable type)

For the system which has to run on Copper cable in RE area

V/F tapping transformer is required as per IRS:TC 76-2006.

Characteristics impedance for V/F transformer is 600 Ω on

primary side(i.e. BPAC side ) and Quad cable impedance on

secondary side (normally it is 470 Ω )

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

(WEBFIL Representative) (Railway Representative)



Annexure III

Pre-commissioning Check List for BPAC (Single Line) (As per IRS:S

105/2012 Ver. 0) PART-A: Site Requirement details (Provided by Railways for installation of BPAC) Station Name:



Communication Medium/Type: OFC/Microwave/Quad Cable: ________________________

Date of installation: Date of commissioning: Sl.

No .

Description Specified Value/ Nos. Obtained

Value / Nos.

(if any)

Remarks

1. Site condition Spacious, clean, dry, well ventilated room preferably with a fan/exhaust fan.

2. Battery 24 V / 120 AH

3. Battery charger Good quality low ripple battery charger (Axle counter type)

24V/10A as per IRS: S-86/2000 or IPS module (24V/5A) as per

RDSO/SPN/165/2004 for each BPAC.

Power supply for BPAC should be separate from Axle


Normal voltage: 24V/5A (-10% to + 20%) at the output voltage at

following 2 condition must be within 21.6V to 28.8V.



(Note: The output voltage must be measured at the

terminals DC-DC converter input).

4. Earthing i) Provision for separate earth pit (preferable) ii) Value of Earth resistance:< 2 Ω

Ω


6. Communication

channel

4 wire Voice Channel



dB

dB

7. Communication

Cable

Jelly filled Quad cable as per specn:IRS:TC 30-05

Length of Quad cable :

The cable insulation(must be better than 10 M

Ω/Km when tested with 500V Megger):

Loop resistance (should be less than 55 Ω/Km):

Signal loss (should be less than 30dB at 2.5 KHz):

Near end cross talk (should be better than

Km

M Ω

Ω

dB

55dB/Km at a frequency of 150KHz):

Far end cross talk (should be better than 67.8 dB

dB/Km at a frequency of 150KHz):

The armour of the cable must be properly earthed. dB


(Centre Link Open

type)

All inputs from the Field, Block Instruments and the Relay room

should be terminated with proper identification in a separate

location to connect to the BPAC terminals.

9. V/F matching

transformer (as per

communication

cable)

To be provided at both ends of Tx and Rx path of the

communication cable Characteristics impedance for V/F

transformer is 600 Ω on primary side(i.e. BPAC side ) and

Quad cable impedance on secondary side (normally it is 470 Ω )

……………………………………… ………………………


Table of Contents



Part B : BPAC Equipment Details (Single line)

Station Name:

Equipment Sl No. : SYS -……..-……………….

Constituent Cards/Modules

Description Sl No. Quantity

Power Supply Card UPS-…-……. UPS-…-…….

2 Nos.

Communication Driver Card UCD-…-……. 1 No

System Card

USY-…-…….

USY-…-…….

USY-…-…….

3 Nos.

Relay Input Card UIP-…-……. UIP-…-…….

2 Nos.

Output Feedback Card UFB-…-……. UFB-…-…….

2 Nos.

Relay Output Card UOP-…-……. UOP-…-…….

2 Nos.

Mother Board UBP-…-……. 1 No

Alarm Extender Module UAM-…-……. 1 No

Display Module UDM-.....-........ 1 No

UFSBI Alarm Panel UAP-…-……. 1 No

Sub Rack

UFSBI Rack

- USR-…-…….

- BPACDL-…-……

1 No.

1 No.

BPAC Panel - BPDL-…-……. 1 No.

Relays:

1. Type: - QN-1 Series (8F / 8B) / 24 V (23 Nos.)

2. Type: - QNA1 Series (8F / 8B) / 24 V (6 Nos.)

3. Type: - QL-1 Series (11F / 4B) / 24 V (2 Nos.)

4. Electronic Time Delay Unit (Fail Safe) – (1 No.)

Address Pairs:

Self: ………………………. Remote: ……………………………..




Annexure IV

Pre-commissioning Check List for BPAC (Double Line) (As per IRS:S

105/2012 Ver. 0) PART-A: Site Requirement details (Provided by Railways for installation of BPAC) Station Name:



Communication Medium/Type: OFC/Microwave/Quad Cable: ________________________

Date of installation: Date of commissioning: Sl.

No .

Description Specified Value/ Nos. Obtained

Value / Nos.

(if any)

Remarks

1. Site condition Spacious, clean, dry, well ventilated room preferably with a fan/exhaust fan.

2. Battery 24 V / 120 AH

3. Battery charger Good quality low ripple battery charger (Axle counter type)

24V/10A as per IRS: S-86/2000 or IPS module (24V/5A) as per

RDSO/SPN/165/2004 for each BPAC.

Power supply for BPAC should be separate from Axle


Normal voltage: 24V/5A (-10% to + 20%) at the output voltage at

following 2 condition must be within 21.6V to 28.8V.



(Note: The output voltage must be measured at the

terminals DC-DC converter input).

4. Earthing iii) Provision for separate earth pit (preferable) iv) Value of Earth resistance:< 2 Ω

Ω


6. Communication

channel

4 wire Voice Channel



dB

dB

7. Communication

Cable

Jelly filled Quad cable as per specn:IRS:TC 30-05

Length of Quad cable :

The cable insulation(must be better than 10 M

Ω/Km when tested with 500V Megger):

Loop resistance (should be less than 55 Ω/Km):

Signal loss (should be less than 30dB at 2.5 KHz):

Near end cross talk (should be better than

Km

M Ω

Ω

dB

55dB/Km at a frequency of 150KHz):

Far end cross talk (should be better than 67.8 dB

dB/Km at a frequency of 150KHz):

The armour of the cable must be properly earthed. dB


(Centre Link Open

type)

All inputs from the Field, Block Instruments and the Relay room

should be terminated with proper identification in a separate

location to connect to the BPAC terminals.

9. V/F matching

transformer (as per

communication

cable)

To be provided at both ends of Tx and Rx path of the

communication cable Characteristics impedance for V/F

transformer is 600 Ω on primary side(i.e. BPAC side ) and

Quad cable impedance on secondary side (normally it is 470 Ω )

……………………………………… ………………………

(WEBFIL Representative) (Railway Representative) Table of Contents



BPAC Equipment Details (Double line)

Station Name:

Equipment Sl No. : SYS -……..-……………….

Constituent Cards/Modules

Description Sl No. Quantity

Power Supply Card UPS-…-……. UPS-…-…….

2 Nos.

Communication Driver Card UCD-…-……. 1 No

System Card

USY-…-…….

USY-…-…….

USY-…-…….

3 Nos.

Relay Input Card UIP-…-……. UIP-…-…….

2 Nos.

Output Feedback Card UFB-…-……. UFB-…-…….

2 Nos.

Relay Output Card UOP-…-……. UOP-…-…….

2 Nos.

Mother Board UBP-…-……. 1 No

Alarm Extender Module UAM-…-

……. 1 No

Display Module UDM-.....-

........ 1 No

UFSBI Alarm Panel UAP-…-……. 1 No

Sub Rack

UFSBI Rack

- USR-…-…….

- BPACDL-…-……

1 No.

1 No.

BLOCK Panel - BPDL-…-……. 1 No.

Relays:

1. Type: - QN-1 Series (8F / 8B) / 24 V (20 Nos.)

2. Type: - QNA1 Series (8F / 8B) / 24 V (7 Nos.)

3. Type: - QL-1 Series (11F / 4B) / 24 V (2 Nos.)

4. Electronic Time Delay Unit (Fail Safe) – (1 No.)

Address Pairs:

Self: ………………………. Remote: ……………………………..




Chapter III

Block Proving By Axle Counter using UFSBI

-Deltron

3.1 Introduction

Deltron make BPAC using UFSBI consists of Triple redundant hardware at all levels with 2/3

decision logic for safety and availability. All input-output connections are optically and/or

galvanically isolated to eliminate ground noise and earth faults. It consists of 16-digit dot-

matrix alpha-numeric display for user friendly man-machine interface.

3.2 Subsystems of Deltron UFSBI

1. DC-DC Converter

2. UFSBI-Digital System

3. Relay Rack

Table of Contents

Figure 14: Deltron UFSBI Cubicle front view



Figure 15: Deltron UFSBI Cubicle rear view



(i) DC-DC Converter

Figure 16: DC-DC Converter front view

Figure 17: DC-DC Converter rear view

Table 6: Inputs & Outputs of DC-DC Converter

Input 24V DC +20% - 10%, 10 Amps 10 Amps

Output 24V DC 4 Amps For Input Sensing & Pickup

Output Relay

5V DC 4 Amps For Digital ICs &

Microcontroller

+12V DC 1.5 Amps For Comm. as per RS232

–12V DC 1.5 Amps For Comm. as per RS232

Works on “HOT STAND-BY” mode. PSMON(Power Supply Monitoring Unit) is

provided to initiate audio visual alarm in SM’s room on UFSBI ALARM PANEL

discussed in a later chapter

Table of Contents



Indication & Switches: The following Indication and switches are provided on DC- DC

Converter

Indication Description

Input 24V DC

ON

The input 24V from Battery charger or UPS is coming to the

I /P of DC-DC converter through LPF and MCB

Input 24V DC

Reverse

The 24V input connection from Battery charger or is

connected to DC – DC converter with reverse polarity.

UV Trip The Input Voltage to DC-DC converter is below 19.2 volts. The

system will not start.

OV Trip The Input Voltage to DC-DC converter is above 30.2

volts. The system will not start.

IP ON This indic ation is provided to check that 24V input for

that specific card is present or not

OP ON This indication is provided to check that output of that

specific c ard is on or not

SWITCH For ON / OFF operation of DC-DC Converter w hich in turn

Put On or Shut down the UFSBI DS

(ii) UFSBI Digital System

UFSBI-DS consists of the following parts

Input c ard

CPU card

Control cum Communication Card (CCC)

Output Card

Reset Box.

MODEM.

UFSBI Alarm Panel

The functionalities of each card is given below

Table of Contents



(a) Input Card

It is responsible for complementary sensing of the relay status of UFSBI. i.e. for sensing one

pick up and one drop contact of each input relays.

INPUT CARD 1, 3 & 5

I/P Relays 1 -8, O/P Relays 1 -8, BIPR1 & BIPR2 Relays feed the input processor cards 1, 3

& 5 provided with opto-isolators.

I/P Relays 9 -16, O/P Relays 9 -16, feed the input processor cards 2, 4 & 6 provided with

opto-isolators.

Input cards convert input 24V DC to 5 V DC

Input Card 1 - 6 CPU Card 1 - 3 Output Card 1 & 2 CC Card

Modems Reset Box

Figure 18 : UFSBI Digital System



The sensing of relays is described in the figures below:

Figure 19: Sensing of relays by Input Cards

(b) CPU Card

The UFSBI system works on a 2 out of 3 majority voting logic i.e. if one CPU card or its

corresponding Input cards goes bad then also system can work. CPU – A read the

Inputs through Input Card 1&2, CPU – B read the Inputs through Input Card 3&4 and

CPU – C read the Inputs through Input Card 5&6. Thereafter the system validates

the data by Inter-processor communication, adds CRC code and send this to CC

card for transmission. On the other end after receiving the data from CC card it decodes

it and sends that to Output card to pick up the Output relay.

(c) Control & Communication Card The CC Card mainly performs two important functions

It drives health check relays (BIPR1 & BIPR 2) and

It converts the data provided by the CPU card as per RS 232 protocol and sends it to

the Modem.

The functioning of CPU and CC Cards is shown in the figure below:

Table of Contents



Figure 20: Function of CPU & CC Cards

(d) Output Card

2 numbers of such cards are provided for driving Output relay. 1 st Output card drives Output

relay 1 to 8 and rest 9 - 16 number output relay is driven by O u t p u t C a r d 2

Figure 21: Function of Output Card



(e) Modem

VF Modem is provided to convert the serial data as per RS232 to Voice Frequency. The following

Fig shows the front and ba ck view of the Modem. Modem works on 4 wire, Asynchronous,

2400 bps mode. Maximum permitted loss between two modems is 30db.

Figure 22: Modem Front and Rear views

Figure 23 : Modem Power connection

Figure 24 : Modem to Motherboard data connection

Table of Contents



Figure 25 : Modem to TX & Rx terminals

Figure 26 : Modem to Modem interconnection between two UFSBI on Voice channel of

OFC

Figure 27 : Connectivity between two modems through copper conductor of quad cable

(f) Reset Box

Figure 28 : Reset Box Front & Rear views



The functions of all the components are given below:

Counter

It keeps track of the number of Reset operations taking place. The counter is non-resettable

electro-magnetic type.

RESET Button

Sometimes the power-off and power-on sequence may not lead to display "0b” (ready to

press BI- ON button) on all CPUs. In that case press the RESET button so that the CPUs again

resets itself to show “0b” (ready to press BI-ON button) on all CPUs.

BI-ON Button

This button is required for starting the system. Whenever all the CPUs display “0b”, it

indicates that it is ready for start. The user has to press this button for starting the system.

BZ-ACK Button: This button is required for acknowledging the buzzer whenever it sounds

due to dropping of “Shut down relays” (BIPR1 & BIPR2).

BI-OK IND.: This indication (green) glows when the UFSBI is in working condition.

BI-FAIL IND.: This indication (red) glows when the Block Interface is in failure mode.

LINK FAIL IND.

This indication (yellow) glows steadily when the modem fails to receive any data from

remote station. In normal working condition, when the modem receives data from

remote station, this indication (yellow) will flicker continuously. Flickering of this

indication does not necessarily means that the UFSBI communication is fully established.

Full establishment of UFSBI communication is only decided by seeing “00” in the CPU

cards and O/P relays are picking up.

POWER-ON-RESET Operation

The following steps are to be performed for carrying out the RESET operation of the UFSBI:

Turn off the system power.

Wait for 1 minute.

Power-on the system.

Check the display of the CPU.

Wait till the display on all the CPUs display “0b”

If “0b” is not displayed, try by pressing the RESET button. If the problem persists

check corresponding codes in the error code list and take appropriate action as



suggested in the remedial action column.

If all the CPUs display “0b” then press the BI-ON button.

Observe that both BIPR1 and BIPR2 pick up immediately after BI-ON is pressed.

Once BIPR1 and BIPR2 pick up, BI fail (Red) indication goes off and BI OK (Green)

indication comes on.

Link fail (Yellow) steady indication goes off & starts flickering as soon as the modem

starts communicating with remote station modem and all the CPU’s display “00”

RESET Operation

The following steps are to be performed for carrying out the RESET operation of the UFSBI:

Press the Reset Button and see that the display in all 3 CPU’s becomes “--“Wait till

the display on all the CPUs display “0b”

If “0b” is not displayed, try by pressing the RESET button. If the problem persists

check corresponding codes in the error code list and take appropriate a ction as

suggested in the remedial action column.

If all the CPUs display “0b” then press the BI-ON button.

Observe that both BIPR1 and BIPR2 pick up immediately after BI-ON is pressed.

Once BIPR1 and BIPR2 pick up, BI fail (Red) indication goes off and BIOK (Green)

indication comes on.

Link fail (Yellow) steady indication goes off & starts flickering as soon as the modem

starts communicating with remo te station modem and all the CPU’s display “00”

(g) UFSBI Alarm Panel The UFSBI alarm panel is provided at SM room to give preventive alarm for single CPU failure,

Redundant DC-DC converter failure and System total failure.

Figure 29: UFSBI Alarm Panel Front & Rear view

The UFSBI alarm panel box consists of following components is given below:

1. ACKN. Button for Single CPU fail: To mute the buzzer if any one of the CPU of

UFSBI goes bad.

Table of Contents



2. ACKN. Button for redundant DC-DC Converter: To mute the buzzer if any module

of DC-DC converter goes bad.

3. ACKN. Button for system failure: To mute the buzzer if UFSBI system goes to shut

down mode.

4. Indication (R) for Single CPU fail: It glows when any one of the CPU of UFSBI goes bad

and remains “ ON” till the fault rectified.

5. Indication (R) for Redundant DC-DC: It glows when any module of DC-DC converter

goes bad and remains “ O N” till the fault rectified.

6. Indication (R) for system failure: It glows when UFSBI system goes to shut down

mode and remains “ ON” till the fault rectified.

Note

The System failure indication (audio & visual) would be “ON” till the UFSBI functioning

normally (BIPR1 and BIPR2 picks up).

3.3 UFSBI Address Configuration Jumpers The Address Configuration jumpers are set in the Connector side of the motherboard. A pattern

of this jumper setting is shown below:

Figure 30: Pattern of Address Configuration Jumpers

The TX Address of one unit should correspond with the RX Address of other unit. The

same type of settings should not be used in the adjacent pair of units.



3.4 Relay Rack & Signalling Relays

All the relays used as per the circuit diagram are of RDSO approved make. Relay

rack is housed inside the same UFSBI cabinet. The Electronic Fail Safe Timer (IRS: S

61/2000) is microcontroller based. Relays are as per nomenclature described below:

Table 7:Block Proving with Axle Counter : Relay disposition for Single Line

BIPR1

QN1

(8F/8B)

TIMER

(120EJ)

TGTXR

QN1

(8F/8B)

SHKR

QN1

(8F/8B)

TGTR

QL1

(11F/4B)

ASGNCR

QNA1

(8F/8B)

HSGNCR

QNA1

(8F/8B)

TCFR

QL1

(11F/4B)

FR1

QN1

(8F/8B)

BIPR2

QN1

(8F/8B)

LFR

4R-3-24

(3 CO)

TCFXR

QN1

(8F/8B)

TCFCR

QN1

(8F/8B)

TGTYR

QN1

(8F/8B)

ASGNCPR

QN1

(8F/8B)

TGTZR

QN1

(8F/8B)

BLR

QN1

(8F/8B)

FR2

QN1

(8F/8B)

CAR

QN1

(8F/8B)

BTSR

QN1

(8F/8B)

TAR2

QN1

(8F/8B)

TAR1

QNA1

(8F/8B)

HSBTPR

QNA1

(8F/8B)

HSATPR

QNA1

(8F/8B)

TGTPR

QN1

(8F/8B)

AZTR

QNA1

(8F/8B)

CNR

QN1

(8F/8B)

TGTNR

QN1

(8F/8B)

ASCR

QN1

(8F/8B)

12O

JPR

QN1

(8F/8B)

BPNR

QN1

(8F/8B)

TCFZR

QN1

(8F/8B)

Table 8:Block Proving with Axle Counter : Relay disposition for Double Line

BIPR1

QN1

(8F/8B)

TIMER

(120EJ)

TGTXR

QN1

(8F/8B)

TGTR

QL1

(11F/4B)

ASGNCR

QNA1

(8F/8B)

HSGNCR

QNA1

(8F/8B)

TCFR

QL1

(11F/4B)

FR1

QN1

(8F/8B)

BIPR2

QN1

(8F/8B)

LFR

4R-3-24

(3 CO)

TCFXR

QN1

(8F/8B)

TCFCR

QN1

(8F/8B)

TGTYR

QN1

(8F/8B)

ASGNCPR

QN1

(8F/8B)

TGTZR

QN1

(8F/8B)

BLR

QN1

(8F/8B)

FR2

QN1

(8F/8B)

CAR

QN1

(8F/8B)

BTSR

QN1

(8F/8B)

TAR2

QN1

(8F/8B)

TAR1

QNA1

(8F/8B)

HSBTPR

QNA1

(8F/8B)

HSATPR

QNA1

(8F/8B)

[D]AZTR

QNA1

(8F/8B)

CNR

QN1

(8F/8B)

TGTNR

QN1

(8F/8B)

ASCR

QN1

(8F/8B)

12O JPR

QN1

(8F/8B)

BPNR

QN1

(8F/8B)

[R]AZTR

QNA1

(8F/8B)

Table of Contents



Table 9: Relays Description

Sr.

No.

Relay

Type &

Normal Status

Description

1 TGTR

(SL &

DL)

QL1, 11F.4B

DROP

Train Going To Relay.

Operates to pick up on receipt of LINE CLEAR at train

sending station.

Normalizes, when station in advance sets to Line closed after

train arrival or cancellation of LINE CLEAR.

2 TCFR

(SL &

DL)

QL1, 11F.4B

DROP

Train Coming From Relay.

Operates to pick up on receipt of LINE CLEAR enquiry from


Normalizes after complete train arrival or cancellation of

LINE CLEAR.

3 ASCR

(SL &

DL)

QN1, 8F.8B

DROP

Advance Starter Signal Control Relay

Picks up, when LINE CLEAR is available and necessary

controls are reversed by SM.

Drops in any of the under-mentioned cases:

a) Entry of train in Block Section.

b) Withdrawal of any SM control.

4 TGTXR

(SL &

DL)

QN1,8F.8B

DROP

Train Going To code Relay.

Picks up at train sending station pressing of buttons for LINE

CLEAR enquiry. Drops when train sending station releases

buttons for LINE CLEAR enquiry or picking up of TGTR

which ever is earlier.

5 TCFXR

(SL &

DL)

QN1, 8F.8B

DROP

TRAIN COMING FROM code Receive Relay.

Picks up on receipt of LINE CLEAR enquiry from train

sending station.

Drops when station in rear releases buttons for LINE CLEAR

enquiry or TGTR pick up which ever is earlier.

6 TGTYR

(SL &

DL)

QN1, 8F.8B

DROP

Train Going To code Receive Relay.

Picks up on receipt of LINE CLEAR at train sending station



b) Cancellation of Line Clear.

7 120 JPR

(SL &

DL)

QN1, 8F.8B

DROP

Timer mature repeater Relay.

Picks up on maturity of Timer for cancellation.

Drops when block status set to Line Closed.

8 BPNR

(SL &

DL)

QN1, 8F.8B

DROP

Bell Push button Relay.

Picks up on pressing of BELL push button with SM’s Key IN,

else drops.

9 TGTNR

(SL &

DL)

QN1, 8F.8B

DROP

Train Going To button Relay.

Picks up on pressing of TRAIN GOING TO push button else

drops.

10 CNR (SL

& DL)

QN1, 8F.8B

DROP

Cancel button Relay.

Picks up on pressing of CANCEL push button else drops.

11 FR1 (SL

& DL)

QN1, 8F.8B

DROP

Flash controller Relay No. 1.

Toggles when Cancellation commenced or any other



Sr.

No.

Relay

Type &

Normal Status

Description

abnormal condition occur.

12 FR2 (SL

& DL)

QN1, 8F.8B

DROP

Flash controller Relay No. 2.

Toggles when Cancellation commenced or any other

abnormal condition occur.

13 TAR1

(SL &

DL)

QNA1, 8F.8B

DROP

Train Arrival First Relay.

Picks up when control on Reception Signal is Reverse and HS

AT occupied by train and HS BT clear.

Drops when AT clear with a delay.

14 TAR2

(SL &

DL)

QN1, 8F.8B

DROP

Train Arrival Second Relay.

Picks up when control on Reception Signal is Reverse and HS

AT is clear and HS BT occupied by train.

Drops when block status set to Line Closed.

15 CAR (SL

& DL)

QN1, 8F.8B

DROP

Cancel relay.

Picks up at Train receiving station on initiation of

cancellation, provided all controls pertaining to Advance

Starter and Reception Signal/Signals and signals controlled by

them are at Normal at both the stations.

Drops when cancellation matures and system goes to Line

Closed condition.

16 BTSR

(SL &

DL)

QN1, 8F.8B

PICK UP

Block Track Stick Relay.

Picks up when Block status is LINE CLOSED and Block

track is clear.



b) Cancellation of Line Clear.

17 AZTR

(SL)

QNA1, 8F.8B

PICK UP

Block Section track Relay of dispatch line.

Drops in the under mentioned cases:

(a) Entry of train in block section, or

(b) Axle Counter failure

18 TGTZR

(SL &

DL)

QN1, 8F.8B

PICK UP

Advance starter signal normal checking repeater Relay.

Picks up to repeat Line Closed condition at train receiving

station after arrival of train or after a Line Clear cancellation

has been initiated, else drops.

19 120 EJ

(SL &

DL)

Electronic

Time delay

unit (Fail Safe)


20 HS

ATPR

(SL &

DL)

QNA1, 8F.8B

PICK UP

First track for direction proving repeater Relay.

Picks up when HSAT track circuit is vacant else drops.

21 HS

BTPR

(SL &

DL)

QNA1, 8F.8B

PICK UP

Second track for direction proving repeater Relay.

Picks up when HS BT track circuit is vacant else drops.

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Sr.

No.

Relay

Type &

Normal Status

Description

22 AS

GNCR

(SL &

DL)

QNA1, 8F.8B

PICK UP

Advance Starter Signal Normal Checking Relay.

Picks up when Advance Starter Signal and all its controls are

at Normal, else drops.

23 HS

GNCR

(SL &

DL)

QNA1, 8F.8B

PICK UP

Reception Signal Normal Checking Relay

Picks up when Reception signal/signals and all its controls are

at Normal, else drops.

24 TCFCR

(SL &

DL)

QN1, 8F.8B

PICK UP

Train Coming From Cancellation Relay.

Picks up at receiving station when CANCEL CO OP button is

pressed at sending station else drops.

25 TCFZR

(SL)

QN1, 8F.8B

PICK UP

Train Coming From Normal Proving Relay.

Picks up at receiving station when TCFR drops, else drops

26 TGTPR

(SL)

QN1, 8F.8B

PICK UP

Train Going To Normal Proving Relay.

Picks up at train sending station when TGTR drops, else

drops

27 SHKR

(SL)

QN1, 8F.8B

PICK UP

Shunt Key Indicating Relay

Picks up when EKT is “IN” & Shunt Release Key is “OUT”,

else drops

28 AS

GNCPR

(SL &

DL)

QN1, 8F.8B

PICK UP

Advance Starter Signal Normal checking (for other station)

Relay

Picks up when Advance Starter Signal and all its controls are

Normal at the other station, else drops.

29 BIPR1

(SL &

DL)

QN1, 8F.8B

TOGGLE

UFSBI health checks Relay.

30 BIPR2

(SL &

DL)

QN1, 8F.8B

TOGGLE

UFSBI health checks Relay.

31 BLR(SL

& DL)

QN1, 8F.8B

DROP

Bell Relay

Picks Up When Other Station Presses the Bell Button

32 [D]AZTR

(DL)

QNA1, 8F.8B

PICK UP

Block Section track Relay of dispatch line.




33 [R]AZTR

(DL)

QNA1, 8F.8B

PICK UP

Block Section track Relay Of Receive line.




Total relay requirement for SL (1 pair) : QN1 – 44, QNA1 – 12, QL1 – 4, Timer – 2

Total relay requirement for DL (1 pair) : QL1 – 38, QNA1 – 14, QL1 – 4, Timer - 2



3.5 Block Proving with Axle counter –Single Line Block Panel

Table 10 : Single Line Block Panel Indications & Controls

Description Colour/Type

Line close indication Yellow

Train Coming from Indication Green

Train Going to Indication Green

TOL Indication Red

Cancel CO-OP Indication Yellow

Cancel Indication Yellow

SNK Indication (Advance & Home) Yellow

SNOEK Indication Yellow

LSS Indication Red

LSS Indication Green

Line Free Indication Green

Line Occupied Indication Red

SHK IN Indication Green

SHK OUT Indication Red

MUX/ UFSBI status OK Indication Green

Figure 31: BPAC Single Line Block Panel Figure 32: Block Panel front view



Description Colour/Type

MUX/ UFSBI status Fail Indication Red

Communication Link Fail Indication Yellow

“Bell” Button Black

“Train Going To” Button Red

“ACKN” Button Black

“Cancel” Co-op Button Green

“Cancel” Button Yellow

“Shunt Release” Key --

SM’s Key --

Counter Cancellation

Call attention Buzzer Intermittent

Train Entry/ Exit buzzer Continuous

3.6 Block Proving with Axle counter –Double Line Block Panel

Figure 34: BPAC Double Line

Block Panel

Figure 33: Block Panel front view

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Table 11: Double Line Block Panel Indications & Controls

Description Colour

Line close indication (UP & DN) Yellow

Train Coming from Indication Green

Train Going to Indication Green

TOL Indication (UP & DN) Red

Cancel CO-OP Indication Yellow

Cancel Indication Yellow

SNK Indication (Advance & Home) Yellow

SNOEK Indication Yellow

LSS Indication Red

LSS Indication Green

Line Free Indication (UP & DN) Green

Line Occupied Indication (UP & DN) Red

MUX/ UFSBI status Ok Indication Green

MUX/ UFSBI status Fail Indication Red

Communication Link Fail Indication Yellow

“Bell” Button Black

“Train Going To” Button Red

“ACKN” Button (UP & DN) Black

“Cancel” Co-op Button Green

“Cancel” Button Yellow

“LCB” Key

SMs Key

Counter Cancellation

Call attention Buzzer Intermittent

Train Entry/ Exit buzzer (Sending) Continuous

Train Entry/ Exit buzzer (Sending) Intermittent



3.7 Installation pre-requisites of UFSBI

Sl.

No. Description

Specified Value / Nos.

1 Environment Spacious, Clean, Dry, Well ventilated room preferably

with a fan/ exhaust fan.

2 Battery 24 V / 120 AH

3 Battery Charger i) Good Quality low ripple battery charger (Axle Counter

type) as per IRS: S-86/2000 or IPS module as per

RDSO/SPN/165/2004

Nominal Voltage – 24 V/10A (-10% to +20%) at

The Output voltage at following 2 conditions must be

within 21.6V to 28.8V:

Charger ON & UFSBI ON

Charger OFF (for 15 min) & UFSBI ON

ii) Separate Power Supply provided for each of BPAC,

SSDAC & Block Telephone.

4 Earthing Value of Earth resistance: < 2

5 Communication

Channel

4 wire Voice Channel on OFC (2400 bps , asynchronous)

S/N ratio: At least 20 dB

Max. TX Signal: -7 dBm to -5 dBm

Min. RX Level: -12 dBm to -14dBm

6 Communication Cable Jelly filled Quad Cable as per specn: IRS: TC 30-05.

Out of the 6 Quad or 4 Quad One Full Quad is to be

assigned for UFSBI. Do not make Four different wires of

different Quads for making a Quad to run the system.

Length of quad cable : as per requirement

The cable insulation (must be better than10 M when

tested with 500V Megger)

Loop resistance (should be less than 55 /Km)

Signal loss (should be less than 30 dB at 2.5 KHz)

The armour of the cable must be properly earthed.

The cable shall be terminated as stated in Annexure I

7 External Terminals

(Centre Link Open type )

All inputs from the Field and the Relay room shall be

terminated with proper identification in a separate location

to connect to the UFSBI terminals.

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8 V/F Tapping

Transformer

Characteristics impedance 470Ω in cable side and 600Ω

on UFSBI side. If the communication link between two

UFSBI is QUAD cable then only it is required.

9 Relays As per requirement

10 Signalling Cable (0.9

mm dia)

As per requirement

3.8 Improvements in UFSBI

To improve the system performance and reduce relays in case of Block Proving with axle counter

Electronic Block Logic Module (EBLM) has been introduced.

Avoiding Relay use in the BPAC application with EBLM

It stands for Electronic Block Logic Module.

It replaces the Block working logic (earlier done with Q-series relay) using EBLM Card vide

Cl. 3.8.1 of spec. IRS S:105/2012

Functionality achieved by using 2 x 2oo2 Fail-Safe Digital Electronic Hardware Logic gates

of CPLD.

Achieves the

functionality of both

Single and Double Line

Logics

Validated as per

CENELEC SIL-4

standard

Figure 35: Provision of EBLM in UFSBI application



Advantages

Reduction of relay contact related failures.

Reduction in wiring.

Reduction in maintenance.

Greater availability with Hot Swap feature for any failed card in 2oo2 x 2

Enhanced Availability which is only achieved by parallel wiring of relay rack at site thereby

reducing time of installation.

3.9 Maintenance

Preventive maintenance

Power supply: regular check on power supply units such as battery banks, battery charger

and DC-DC converters is mandatory to prevent equipment faults and malfunctioning.

Relays: Special care and testing is required for those relays which are to be used after long

storage. No attempt is to be made to repair a relay. Always new relay should be used.

Maintenance of Communication Link

Telecom cable is to be protected from injury during other kinds of installation at its

vicinity.

If disconnection of cable is required, the c able terminal is to be refitted firmly.

The loss of signal due to defective cable is to be kept under check.

The display indication “33” indicates link failure. If the modem is found to be O.K, next to

be checked is the telecom c able.

Maintenance of Equipment

UFSBI unit will automatically trip-off if the Battery supply goes below 19.2V & above

28.8V DC. In case of repeated trip-off, both the DC supply level and the loading are

to be checked. A healthy UFSBI should not draw more than 1.8 Amp DC.

No attempt of “resetting” is to be made in case of supply impairment or link failure.

If a faulty UFSBI system is not brought ba ck to normal after “resetting” one must

check:

If there is any loosely fitted connector or improperly pressed PCB module.

Connecting leads inserted in Terminal.

The DC supply levels of the DC-DC converter.

For specific information on faults, refer “UFSBI Error Code List”.

Once a fault is found, the user should not attempt repairing at component level. The

impaired module / PCB needs to be replaced by a spare one.

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Table 12: Maintenance Schedule for UFSBI

Sr.

No.

Description ESM JE/SSE SSE

1

Check the Display in all 3 CPU's. It must display flashing 0

(ZERO). 0 (ZERO) indicates that the system is healthy &

functioning properly.

F M Q

2

Check the working voltage of UFSBI unit. It should not be

below 21.6 V & above 28.8 V DC. (ALTHOUGH IT CAN

WORK FROM 19.2V TO 31.2V)

F M Q

3

Check the various outputs of DC-DC converter and record all

the output supply voltages & output level should be as follows :

(i) 5V [+/- 3%] (ii) +12V [+/- 2%] (iii) -12V [+/- 2%] (iv)

24V [+/- 5%]

F M Q

4 Check the working current. A healthy UFSBI should not draw

more than 1.8 Amp DC. F M Q

5

Check the communication channel (OFC) loss with Telecom

staff & it should not be more than 30 db between two modems

of UFSBI.

- HY Y

6

Check the link parameters with Telecom staff

(i) For trans = -05 to -10 db (After removing cable side

connection)

(ii) For Receive = -12 to -22 db

- HY Y

7 Check the surge arrester module working properly with zero

voltage drop. F M Q

8

Check the link fail indication on reset box. This indication

(yellow) will normally flicker continuously meaning modem

receiving data from remote station modem. Link failure is

indicated by steady yellow.

F M Q

9 Check proper functioning of all push buttons, indications,

buzzers, counter & keys provided on ASM block panel. F M Q

10 Check that all the connectors & PCBs in the 6U rack are

inserted properly. F M Q

11 Check that all UFSBI relay contacts are clean and free from

pitting. F M Q

12 Check that all fuses provided are of proper capacity F M Q

13

Check that ripple voltages are not more than the specified

voltage which are as follows :-

i) 5 V DC not more than 40 mv

ii) +12 V DC not more than 30 mv

iii) -12 V DC not more than 30 mv

F M Q

14

i) If Single CPU fail indication appears on UFSBI alarm panel

then check all 3 CPUs cards. If anyone is not working, replace

defective CPU

ii) If redundant DC-DC convertor fail indication appears on

UFSBI alarm Panel then check the DC-DC convertor.

iii) If System failure indication (audio & visual) appears on



Sr.

No.

Description ESM JE/SSE SSE

UFSBI alarm panel it would be ON till the UFSBI functioning

normally (till BIPR1& BIPR2 picks up) then reset the system. If

not reset then check error codes shown on the CPU & the LED

on the Output cards & the control & communication card & take

the actions recommended by manufacturer

15 Check that all the relays in UFSBI relay rack are properly

plugged and holding clips are intact. F M Q

16 Check that all cable terminations are tight and properly

connected. F M Q

17 Measure the earth resistance & it should be less than 2 ohm HY HY Y

18 Check the earthing wire & its connectivity for tightness F Q HY

19 Check address jumper of both mother cards of connected

UFSBI unit for their correspondence unit. - HY y

20 Check all the parameters of communication link along with

telecom staff. - HY Y

21 Check that proper gasket is provided in the UFSBI cubicle to

prevent the ingress of water dust, insects / pests etc. F M Q

22 Check that terminations of wires are with a unique number for

easy identification. - - Y

23 Wiring of relay rack is properly dressed and laced. - - Y

24 Ensure that ASM alarm panel indications are extended to

ESM's duty room & to the Data loggers. - - Y

25

Ensure that all potential free contact of UFSBI ( power supply

monitor , single CPU failure detection & single System failure

detection ) are wired in Data logger and extended to ESM's

duty room.

- - Y

3.10 Do’s & Don’ts

UFSBI system is to be operated or maintained only by trained persons.

No attempt is to be made to operate the equipment at Battery Voltage ranging

bellow 19.2V and above 28.8V DC.

Connectors or PCBs is to be plugged in or out after switching off the Power Supply.

“RESET” should not be applied in case of “Link Failure” or “Supply” Break Down.

Replacement of components or modules is to be done with spares

supplied/prescribed by the manufacturer.

While plugging in / out a PCB, c are is to be taken to avoid application of excessive

force.

Arbitrary grounding should not be done to any “common” terminal inside the

Table of Contents



equipment.

Relay testing should not be performed involving forced ‘pick-up’ or ‘drop’ while

the instrument is “ON”.

Standard restrictions against mishandling and opening of Block Instrument are

applicable also to UFSBI.

3.11 Error code list & recommended actions

In case of any fault, please follow the steps in the order as stated below:

(1). Note the codes shown on the CPU and the LED on the Output cards and the

Control & Communicat ion Card.

(2). It should also be recorded that under which condition the failure occurs, i.e.

whether it occurs repeatedly during a certain operation or is it intermittent in

nature.

(3). Perform a Power-On-Reset following the steps given in item Power- On-Reset under

para 3.2 (f) on page 44.

(4). In case the problem persists or recurs even after Power-On-Reset then follow the

troubleshooting given in Error code list Table

(5). During troubleshooting, whenever directed to check the effect of any change or

replacement of card, please perform Power-On-Reset as stated above.

Detailed error code list along with recommended remedial actions is given on next page

NOTE:

BEFORE TAKING OUT OR INSERTING A CARD, ALWAYS TURN-OFF THE POWER SUPPLY



Table 13: Error code list & Recommended actions for Block Working With UFSBI &

DAC(Deltron) in case of Faults/ Errors Codes Failure Cause Recommended Actions

00

NORMAL MODE.

a) Flashing ‘00’ indicates that the system is

healthy & functioning properly.

b) If this code becomes steady in certain CPU

and an error code of ‘37’, ‘38’ or ‘39’

appears (according to the stuck CPU) on the

other CPU’s try “RESETTING” the system as

stated in item Resetting operation under para

3.2 (f) on page 45. b) In case the problem persists change the

CPU showing the steady code.

01 Output Latch 1 Read-back bad a) If the code is displayed simultaneously in

more than 1 CPU:

Then check if the CCC card is inserted

properly in the slot. If the problem still persists

replace the CCC card.

b) If the code comes on a single CPU:

i) First swap the faulty CPU with another slot.

ii) If the c ode shifts with the CPU to the new

slot, change the CPU c ard else change the

Output c ard

02

Output Latch 2 Read-back bad

05

UFSBI source address mismatch in

receive message

Check Address jumpers of both mother cards of

connected UFSBI units for their correspondence

refer page 33. If the fault is in one CPU card only

(unlikely) replace the CPU card.

06

UFSBI destination address

mismatch in receive message

Check Address jumpers of both mother cards of

connected UFSBI units for their correspondence

refer page 33. If the fault is in one CPU card only

(unlikely) replace the CPU card.

07

TXENABLE-A/B/C signal

produced by Inter-block data

selector logic in CCC not

matching with Inter-block

phase.

If this occurs in all the CPUs, change the CCC

Card. This can also happen when the UFSBI is

working in 2/2 mode and a further failure occurs.

This is not a serious problemand will go up on

“RESET”.

08 CPU failed to transmit a) Swap the CPU with another slot, if the

problem shifts with the CPU, and then change the

CPU card. b) Check the system, if the fault persists in the

same slot, change the CCC card.

0A Clear input to U9 low

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Codes Failure Cause Recommended Actions

0B

(Ob)

Ready to accept 'start'

command after POST

a) Press “BI-ON” button to start the system

within 30 sec. If the button is not pressed in time

then all the three CPUs will display “99”

code and go to shut down. To recover from

this problem the power supply is to be turned

off and the on. After the POST process all the

CPUs will display “ 0b ” again.

b) In case anyone CPU is showing steady 0B,

while others are running with 37, 38 or 39, try

“RESETTING” the system.

0C PS monitor test in progress in

POST

Wait for all CPUs to display “0b”.

10 IN1 complementary

failure (Ckt ref. W2 & W10)

Manually RESET the system. If the problem persists

then

i) In case the Error Code is appearing in 1 of the 3

CPUs,

a) Swap the Input Card 1 with another Input

Card 1 for Error Codes “10” to “1F”,

observe the outcome

b) Swap the Input Card 2 with another Input


observe the outcome

11

IN2 complementary failure

(Ckt ref. W3 & W11)







In case (I)-a,b fails to solve the problem,

c) Change Input Card 1 for Error Codes

“10” to “ 1F” d) Change Input Card 2 for

Error Codes “20” to “ 2F”

Manually RESET the system and observe its

operation

ii) If the Error codes are appearing in at least 2 of

the 3 CPU’s simultaneously then check volta

ges at the respective relay conta cts and wa

go terminals as per circuit dia gram Sh. 6A and

6B of 12 of RDSO/S/32018 (atta ched in the

Manual) for the inputs IN1-IN7 (Wago W2-W8

) and inputs IN1’-IN7’ (Wago W10-W15) . For

other inputs like IN8, IN9- IN16 (Wago W9,

W64-W71) and IN8’, IN9’-IN16’ (Wa go W17,

W72-W79) check the loopin g as per circuit

referred above. Manually RESET the system and

observe its operation

iii) If the problem still persists check the flat







18 OUT1 complementary

failure (Ckt ref. W18

& W26)



1A OUT3 complementary


1B OUT4 complementary


1C OUT5 complementary




Codes Failure Cause Recommended Actions & W30) cable connections between the wa go board

and motherboard as per di g. 2.1. Manually

RESET the system and observe its operation

iv) In c ase the error still persists, repla ce-

a) Input Card 1 for Error Codes

“10” to “1F” b) Input Card 2 for

Error Codes “20” to “2F”


operation

1D OUT6 complementary


1E OUT7 complementary


& W32)

'1 ' (1F) OUT8 complementary


& W33)



Manually RESET the system following the same

process as stated in item no. ****. If the problem

persists then

In case the Error Code is appearing in 1 of the 3

CPU’s,

a) Swap the Input Card 1 with another Input


observe the outcome

b) Swap the Input Card 2 with another Input


observe the outcome.

In case (I)-a,b fails to solve the problem,

c) Change Input Card 1 for Error Codes

“10” to “ 1F” d) Change Input Card 2 for

Error Codes “20” to “ 2F”


operation

If the Error codes are appearing in at least 2 of

the 3 CPU’s simultaneously then check

voltages at the respective relay contacts and

wago terminals as per circuit diagram Sh. 6A

and 6B of 12 of RDSO/S/32018 (attached in the

Manual) for the inputs. Manually RESET the

system and observe its operation

i) If the problem still persists check the

flat cable connections between the wago

board and motherboard as per dig. 2.1.


operation

ii)In case the error still persists, replace-

a) Input Card 1 for Error Codes

“10” to “1F” b) Input Card 2 for






failure (Ckt ref.

W67 & W75)


failure (Ckt ref.

W68 & W76)











2A OUT11 complementary


2B OUT12 complementary


2C OUT13 complementary


2D OUT14 complementary


Table of Contents




2E OUT15 complementary


Error Codes “20” to “2F”


operation '2 ' (2F)

OUT16 complementary


30 BIPR1 complementary failure Take similar steps as in the case for other relays.

31 BIPR2com plementary failure

33 Link Fail (SSB mode) If the error code appears in any one of the CPU card: i) Swap it with other slot. If the error shifts

with the card Change the CPU c ard.

If the error code appears in any one of the CPU

card:

i) Check the communication link from crone box,

terminal, to modem RJ11 jack. If external

communication link

is confirmed OK change the CCC Card.

ii) If the problem still persists, Switch off the

Modem, and then restart it after 60s.

iii) If the problem still persists perform Power-On

Reset of the System and observe its operation

34

RSSB mode This mode indicates that the UFSBI on the other side

is not receiving data. Try by checking the channel,

modem and communication in that order as stated

for error code ‘33’. Ensure that the other side

System is working and showing error

code ‘33’ only.

37 CPU A bad i) Change corresponding CPU Cards in which the

static error code is showing. Manually RESET the

system and observe its operation.

ii) If this indication is on all the CPU cards then

change the CCC (Communication) Card. Manually

RESET the system and

observe its operation

38 CPU B bad

39 CPU C bad

3A Inter-pro cessor c ommunic ation channel failure (common mode)

If occurs in all the CPUs, change the communication

card. Manually RESET the system and observe its

operation

40 OUT1 forced

pickup [LFR Non-

Manually RESET the system following the same

process as stated in item no. II.15. If the problem




vital relay] persists then For codes “40” to “4F” check the

corresponding relays as follows

i) Check if the relay is properly plugged and the

retaining clip is place correctly. Also ensure

that all its receptacles are rightly placed and

locked in the plug board. Manually RESET

the system and observe its operation.

ii) Check the corresponding relays to see if the

front contacts somehow got voltage or ba ck

contacts got broken or if the relay has got

picked up out of sequence by some stray feed

given externally. Manually RESET the

system and observe its operation.

iii) Check the wago terminals for unwanted

shorting between terminals other than those

showed in circuit. In case any such short

circuits found please remove the same.

Manually RESET the system and observe

its operation.

41 OUT2 forced pickup

[TCFXR vital relay]


[TCFCR vital relay]


[TGTYR vital relay]


[ASGNCPR vital relay]


[TGTZR vital relay]


[BLR vital relay]


48 OUT9 forced pickup Manually RESET the system following the same

process as stated in item no. II.15. If the problem

persists then For codes “40” to “4F” check the

corresp onding relays as follows

iv) Check if the relay is properly plugged and the

retaining clip is place corre ctly. Also ensure

that all its recepta cles are rightly placed and

locked in the plug board. Manually RESET

the system and observe its operation.

v) Check the corresp onding relays to see if the

front conta cts somehow got voltage or ba ck

conta cts got broken or if the relay has got

picked up out of sequence by some stray feed

given externally.

Manually RESET the system and observe

its operation.

vi) Check the wa go terminals for unwanted

shortin g between terminals other than those

showed in circuit. In case any such short


4A OUT11 forced pickup

4B OUT12 forced pickup

4C OUT13 forced pickup

4D OUT14 forced pickup

4E OUT15 forced pickup

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4F OUT16 forced pickup circuits found please remove the same.


operation.

50 IN1 jitter Jittery contacts of the relay may occur when a

particular relay does not stabilize, i.e. it ‘chatters’.

This may happen due to low coil voltage, faulty

receptacles (coil or contacts ) or improper plugging

of the relays without retaining clips.

51 IN2 jitter

52 IN3 jitter

53 IN4 jitter

54 IN5 jitter The following actions are suggested: a) Check the setting in the plug board for proper

plugging

b) Check firmness of the contacts and all

connections from output connector coil (for

output relays).

c) Check coil and contact voltage for each input

paths from the circuit. Try removing and

re-plugging each relay in the circuit path

separately ensuring that it is fitted firmly to the

plug board and the retaining clip is in the

right place

d) For output relays, try to measure the coil voltage

at the corresponding wago terminal as well as

the relay coil R1- R2. Note that this voltage is

available for less than ½ sec, so using an

analog voltmeter is preferred. It is advisable to

try by changing the corresponding output card.


operation.

55 IN6 jitter

56 IN7 jitter

57 IN8 jitter

58 OUT1 jitter [LFR Non-vital

relay]

59 OUT2 jitter [TCFXR vital relay]

5A OUT3 jitter [TCFCR vital relay]

5B OUT4 jitter [TGTYR vital relay]

5C OUT5 jitter [ASGNCPR vital

relay]

5D OUT6 jitter [TGTZR vital relay]

5E OUT7 jitter [BLR vital relay]

5F OUT8 jitter

60 IN9 jitter

61 IN10 jitter Jittery contacts of the relay may occur when a

particular relay does not stabilize, i.e. it ‘chatters’.

This may happen due to low coil voltage, faulty

receptacles (coil or contacts ) or improper plugging

of the relays without retaining clips.

62 IN11 jitter

63 IN12 jitter




64 IN13 jitter The following actions are suggested:

a) Check the setting in the plug board for proper

plugging

b) Check firmness of the contacts and all

connections from output connector coil (for

output relays).

c) Check coil and contact voltage for each input

paths from the circuit. Try removing and

re-plugging each relay in the circuit path

separately ensuring that it is fitted firmly to the

plug board and the retaining clip is in the

right place

d) For output relays, try to measure the coil voltage

at the corresponding wago terminal as well as

the relay coil R1- R2. Note that this voltage is

available for less than ½ sec, so using an

analog voltmeter is preferred. It is advisable to

try by changing the corresponding output card.


operation.

65 IN14 jitter

66 IN15 jitter

67 IN16 jitter

68 OUT9 jitter

69 OUT10 jitter

6A OUT11 jitter

6B OUT12 jitter

6C OUT13 jitter

6D OUT14 jitter

6E OUT15 jitter

6F OUT16 jitter

70 BIPR1 jitter

71 BIPR2 jitter

73 Shut down relay phase generator

failure (phase not changing

within 30 minutes)

If this indication is on a single CPU card change

the CPU card.

If all the 3 CPUs show this code then change the

communication c ard.

75 Timer2 input bad RESET the system by pressing RESET button and

then BI-OK button in a sequential manner. If

problem persists chan ge corresponding CPU c ard. 78 Data bus check failed

79 EPROM Checksum failed

7A BIPR1 input to GAL stuck at low

RESET the system by pressing RESET button and

then BI-OK button in a sequential manner. If

problem persists change corresponding CPU card.

If the problem still remains change CCC Card.

When all CPUs show the code, change CCC

7B

BIPR2 input to GAL stuck at

low

7C BIPR1 command output not

matching with shutdown

relay phase.

RESET the system by pressing RESET button and then

BI-OK button in a sequential manner. If problem

persists change corresponding CPU c ard. 7D BIPR1 command output not

matching with shutdown

relay phase.

Table of Contents



Relay forced/ fail to pick up failure codes of UFSBI

Failure

Code

Relay Name Contact No.

to be checked

Corresponding

WAGO No.

80 OUT1 R1, R2 W47, W48

81 OUT2 R1, R2 W49,W50

82 OUT3 R1, R2 W51, W52

83 OUT4 R1, R2 W53, W54

84 OUT5 R1, R2 W55, W56

85 OUT6 R1, R2 W57, W58

86 OUT7 R1, R2 W59, W60

87 OUT8 R1, R2 W61, W62

88 OUT 9 R1, R2 W102, W103

89 OUT10 R1, R2 W104, W105

8A OUT11 R1, R2 W106, W107

8b OUT12 R1, R2 W108, W109

8C OUT13 R1, R2 W110,W 111

8d OUT14 R1, R2 W112, W113

8E OUT15 R1, R2 W114, W115

8 OUT16 R1, R2 W116, W117

Communication link failures codes of UFSBI

For this failure the Error cod e would be “33” / “34”

First check the +12V & -12V power supply from DC-DC converter is present or not.

Then Check all the physical connection from Modem To OFC Primary Mux/ Quad Cable.

Put the Loop/ Normal Switch which is placed in the back MODEM to the Loop position and

check if all the CPU’s are showing “06” or not.



(a). If all the CPU’s are showing “06” then the digital part of Modem and CC card of

UFSBI is OK. Check the communication link for this failure. To check this

communication line first check the Modem TX power which has to be in the range of -

7dB to - 12dB. Then check the receive power at other end. The Loss should not be

more than 30dB in the line.

(b). If the system does not show “06” change the CC Card first and see the result. If this

does not solve the problem change the corresponding Modem.

Please refer Flowchart on page 75 Figure 36

Cards or DC-DC Converter failure of UFSBI

Card failure For any Hard failure i.e. components/ IC’s failure in Cards the corresponding codes will be shown in

the CPU cards. Power OFF the system then Power On the system again. If it does not solve the

problem change the corresponding card. The main reason of this hard type of failure are Improper

Battery Charger, Battery Charger without Battery bank, Improper earthing, Direct Lightning. So

before inserting a new card ensures these are proper.

This system is 2/3 Active Redundant system so if any one CPU card fails the system can continue to

work without any hindrance in block working operation but Single CPU failure alarm will come to the

SM room so that maintainer can attend the system and rectify the fault, as a preventive measure.

DC-DC converter failure DC-DC converter used in UFSBI is Dual redundant hot standby type. So any of the module fails

system can work as each module is capable of taking full load of UFSBI on it’s rated voltage. Like

CPU, redundant DC-DC converter failure indication is also extended to the SM’s room.

The Following Cards has to be replaced during the following error codes showing in all the 3 CPUs:

.

Error Code Card To be Replaced

01, 02, 05, 07, 08, 0A, 3A, 73, 7A, 7B, A0,

A1, A2,A3,A4, A5,A6,A7,A8, B5,B6,

B7,B8,B9, BA, BD, C1, C6, C9, CA, E1,

E2, E8,E9, EB, EC, ED, FA, FB, FD

CCC

93 O/P 1 then O/P 2

95, AA O/P 1

96, AB O/P 2

If these errors are shown in only one CPU change the corresponding CPU card.

Please note that before changing any of the card perform at least TWO Power-On-Resets to

ensure that card is permanently damaged not a temporary hang.

For Detailed failure Code Refer Failure Code List.

Table of Contents






Figure 36 :Flowchart for Rectification of Communication link failure Deltron make UFSBI

Table of Contents



Figure 37: Block Proving with Single Section Digital Axle Counter & UFSBI for Single Line

System Components

The System comprises of the following items as per IRS S:105/2012

BLOCK PANEL (As per drawing no. RDSO/S 32019) (1 PAIR)

UFSBI (As per IRS S:104/2012) (1 PAIR)

RELAY RACK (As per drawing no. RDSO/S 32020) (1 PAIR)

Block Telephone (As per RDSO/SPN/191/2006) (1 PAIR)

Single Section Digital Axle Counter (As per RDSO/SPN/177/2003) (1 PAIR)

Typically 10-20 Km

UFSBI - 1

Block Interlocking

Circuit w ith

Q-type relays

(designed by RDSO)

2/3 Fail-Safe Digital

Mux - UFSBI ( as per

RDSO/SPN/147/97)

Push Button type

Block Operating

Panel (designed

by RDSO )

Status of Vital

Relay (through

potential

f ree contacts)

AXLE

SENSOREVALUATOR

SSDAC - 1

4 4

UFSBI - 2

Block Interlocking

Circuit w ith

Q-type relays

(designed by RDSO )



RDSO/SPN/147/97)

Push Button type

Block Operating

Panel (designed by

RDSO )

Status of Vital

Relay (through

potential

f ree contacts)

AXLE

SENSOREVALUATOR

SSDAC - 2

44

STATION - A STATION - BBLOCK SECTION

Block Proving with single section Digital Axle Counter & UFSBI

Station Interlocking

System (MACL, RRI,

PI, SSI


System (MACL, RRI,

PI, SSI

1 Quad Cable or 4 WireVoice Channel on OFC

1/2 Quad Cable or2 Wire Voice

Channel on OFCBlock Panel - 1 Block Panel - 2

Relay

interlocking ckt.-2Relay

Interlocking ckt.-11/2 Quad Cable or 2 Wire Voice

Channel on OFC

Block Telephone Block Telephone






System Components

The System comprises of the following items as per IRS S:105/2012

BLOCK PANEL (As per drawing no. RDSO/S 32017) (1 PAIR)

UFSBI (As per IRS S:104/2012) (1 PAIR)

RELAY RACK (As per drawing no. RDSO/S 32018) (1 PAIR)

Block Telephone (As per RDSO/SPN/191/2006) (1 PAIR)

Single Section Digital Axle Counter (As per RDSO/SPN/177/2003) (2 PAIRS)

Table of Contents

Typically 10-20 Km

UFSBI - 1

Block Interlocking

Circuit w ith

Q-type relays

(designed by RDSO)



RDSO/SPN/147/97)

Push Button type

Block Operating

Panel (designed

by RDSO )

Status of Vital Relay

for UP & DN Line

(through seperate

potential

f ree contacts)

AXLE

SENSOREVALUATOR

SSDAC - 1 (DN)

4 4

UFSBI - 2

Block Interlocking

Circuit w ith

Q-type relays

(designed by RDSO )



RDSO/SPN/147/97)

Push Button type

Block Operating

Panel (designed

by RDSO )

Status of Vital Relay for UP &

DN Line (through seperate

potential f ree contacts)

AXLE

SENSOREVALUATOR

SSDAC - 2 (DN)

44



System (MACL, RRI,

PI, SSI


System (MACL, RRI,

PI, SSI

1 Quad Cable or 4 WireVoice Channel on OFC

1/2 Quad Cable or2 Wire Voice

Channel on OFCBlock Panel - 1

Relay

Interlocking ckt.-1

Typically 10-20 Km

AXLE

SENSOREVALUATOR

SSDAC - 1 (UP)

4 4

AXLE

SENSOREVALUATOR

SSDAC - 2 (UP)

44


1/2 Quad Cable or2 Wire Voice Channel

on OFC

1/2 Quad Cable or 2 Wire VoiceChannel on OFC

Block Telephone Block Telephone

Relay

Interlocking ckt.-2

Block Panel - 2

Block Proving with single section Digital Axle Counter & UFSBI

Figure 38 :Block Proving with Single Section Digital Axle Counter & UFSBI for Double Line



Annexure V

Pre-commissioning Check List for Deltron BPAC using UFSBI & SSDAC Name and Type of Equipment: BPAC using Universal Fail Safe Block

Interface (UFSBI) and SSDAC

Specific ation No: IRS:S-105/2012

Name and Address of

manufacturer/supplier:

M/s Deltron Equipment & Systems

Pvt.Ltd. 26, Convent Road, Kolkata-700 014

Serial number of the equipment:

Station Name:

Division/Zonal Railway:

Software checksum:

‘B7 0E’

UFSBI working on:

OFC / Microwave / Quad Cable

DATE OF INSTALLATION:

DATE OF COMMISSIONING:

DATE OF INSPECTION:

Note:

System should be installed and commissioned by authorized technical staff of manufacturer only.

Commissioning of Universal Fail Safe Block Interface (UFSBI) 4 has to be done by OEM as per

RDSO approved pre-commissioning checklist No. SIG 0611 Ver.0.

OEM shall certify that verification of system installation has been completed by OEM and

all necessary arrangements meet the required standards of engineering for trouble free

working of installed system.



Sl.

No.

Description Specified Value / nos. Obtained Value / Nos. (if any)

Ok/ Not Ok

1. Environment Spacious, Clean, Dry, Well ventilated room

preferably with a fan/ exhaust fan.

Space for SM’s panel at SM room – 610 x

400 x 465 Cubic mm.

Space for UFSBI alarm panel at SM’s room

- 265 x 170 x 105 Cubic mm

Space for UFSBI cubicle at Relay room -

1430 x 710 x 480 Cubic mm

2. Battery 2 x 12 V / 120 AH

3. Battery Charger Good Quality low ripple battery charger

(Axle Counter type) as per IRS: S-

86/2000 or IPS module as per

RDSO/SPN/165/2004

Nominal Voltage – 24 V/ 10A (-10% to

+20%) at

The Output voltage at following 2

conditions must be within 21.6V to 28.8V:

V

Charger ON & UFSBI ON

Charger OFF (for 15 min) & UFSBI ON V

(Note: The output voltage must be measured

at the terminals DC-DC Converter Input)

4. Earthing Separate earthing should be provided for UFSBI cubicle. Value of Earth resistance: < 1 ohms

5. Lightning

Arrestor

Good lightning protection system with

proper connection with earth provided

from any of the following firms:-

M/s Phoenix Conta cts or M/s Cape Electric

Corpn. or M/s MCML Systems Pvt. Ltd. or

M/s Adhunik Power Systems or OBO

Bettermann India (P) Ltd. Or CITEL or

ERICO.

6. Communication

Channel

4 wire Voice Channel on OFC (2400

asynchronous)

Max. Tx Signal: -7 dBm to -5 dBm

Min. Rx. Level: -12 dBm to-14dBm

bps ,

dBm

dBm

Table of Contents



Sl.

No

Description Specified

Value/

nos.

Obtained

Value/ Nos. (if any)

Ok/

Not Ok

7.

Communication

Jelly filled Quad Cable as per specn: IRS: TC

30-05 Length of quad cable: The c able insulation (must be better than

10 M Ohm when tested with 500V

Megger): Loop resistance (should be less than 55

Ohm/Km): Signal loss (should be less than 30 dB at

2.5 KHz): Near End Cross talk (should be better

than 55dB/Km at a frequency of 150

KHz):

Far End Cross talk (should be better

than 67.8 dB/Km at a frequency of 150

KHz)

The armor of the cable must be

properly earthed. The cable shall be terminated

as stated in Annexure A

Cable

Km

MOhm

Ohm

dB

dB

dB

8. External

Terminals

(Centre Link

Open type )

All inputs from the Field, Block

Instruments and the Relay room shall be

terminated with proper identification in a

separate location to connect to the UFSBI

terminals

9. 1 x 60C indoor For interconnection between SM-

Panel to BPAC cubicle.

Sq.mm diameter Length is as per distance between

SM panel at SM room to BPAC

cable cubicle. Out of 60 core 48 cores are

used and rest are spare

10. 1 x 40C indoor

cable of 0.9

Sq.mm diameter

cable

For interconnection between relay rack to

BPAC cubicle. Length is as per

distance between CTR at relay room to

BPAC cubicle.

11 Copper Wire of

2.5 Sq.mm dia

(Red & Black in

colour)

For provision of power supply for BPAC.

Length is as per distance between

battery charger or IPS room to BPAC to

cubicle.



12. V/ F tapping

transformer

For the system which has to run on

copper c able in RE area V/F tapping

transformer is required as per IRS:TC 76-

2000

Characteristics impedance of the V/F

transformer is 600 on primary side (i.e.

BPAC MODEM side) and Quad cable

impedance on secondary side (normally

470).

13. Relays For One Block section number of relays

are given below

For Double Line: QN1(8F/8B) – 38,

QNA1(8F/8B)

– 14, QL1 (11F/4B) – 4, Electronic fail safe

Timer- 2

Signal checking

Check the Block Instruments Indication for the Following condition: Sl.

No.

Test Observed result (OK / NOT OK)

STATION “ A” STATION “B”

01. SM’s Key Control on Line Clear

02. Refusal of Line Clear enquiry through LCB Key Control

03. Normal Train Movement ( For at least 2 trains from both

direction)

04. Cancella tion of Line Clear (From Both side) and check Cancel Counter

05. Advance Starter should not go to Green (taken OFF) without

Line Clear

06. Advance Starter should not go to Green (taken OFF) if

UFSBI fails after taking of Line Clea r

07. Advance Starter should not go to Green (taken OFF) after

Train enters block section

08. Advance Starter should not go to Green (taken OFF) after

Train clears the block section but the Block instrument

does not go to Line Closed condition due to any

reason. The advance starter should come only after

Block Instrument goes to First Line Closed then a fresh

Line Clear is taken. (One train One Slot condition)

09. Advance Starter should not Fly Back from Green to Red

(OFF - ON) due to UFSBI System failure or UFSBI Link

failure.

10. Cancel CO-OP cannot be extended from train

sending station unless and until Advance starter signal

and it’s all c ontrols are normal.

Table of Contents



Unit details.

(A) Input Cards. : 6 nos.

1. Sl. no. : Deltron /UFSBI / Input ……………….






(B) CPU Cards. : 3 nos.

1. Sl. no. : Deltron/UFSBI/CPU ……………….

2. Sl. no. : Deltron /UFSBI /CPU ……………….

3. Sl. no. : Deltron /UFSBI /CPU ……………….

(C) Output Cards. : 2 nos.

1. Sl. no. : Deltron/UFSBI / Output……………….

2. Sl. no. : Deltron /UFSBI / Output……………….

(D) Com. & Con. Card. : 1 no.

1. Sl. no. : Deltron/UFSBI/ CCC……………….

(E) Reset Box. : 1 no.

1. Sl. no. : Deltron/UFSBI / RSTBX……………….

(F) Modem. : 1 no.

1. Sl. no. : Deltron/ UFSBI/ Modem/P……………….

Settings : LOOP ANS

1 2

NORMAL ORG



(G) Relays. : To be supplied by

Railways as per

system Requirement.

(H) Power supply. : 1 no (with hot

standby) 1. Sl. no. :

……………………………

(I) Personality module. : 1 set.

1. PSM card. : 1 no.

Sl no. : Deltron/UFSBI / PSM……………….

2. IFU TX : 1 no.

Sl no. : …………………………………

3. IFU RX : 1 no..

Sl no. : …………………………………

4. IFU Driver : 1 no.

Sl no. : …………………………………

(J) Initial Reset Count. : Commissioning Reset Count. :

(K) Address Pairs. TX RX

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

Table of Contents






References

IRS Specification No. IRS:S104-2012 for Universal fail safe Block interface

(UFSBI)

IRS Specification No. IRS:S105 Block Proving with Axle Counter using

UFSBI/MUX combiner.

User's Manual for Block Proving with Axle Counter using UFSBI -M/s Deltron

Equipment & Systems Pvt. Ltd., Kolkata

User's Manual - Block Proving by Axle Counter(For Single Line with UFSBI) -

M/s Webfil Ltd., Kolkata

User's Manual - Block Proving by Axle Counter(For Double Line with UFSBI) -

M/s Webfil Ltd., Kolkata

Quality Policy

“We at RDSO Lucknow are committed to maintain and

update transparent standards of services to develop safe,

modern and cost effective railway technology complying with

statutory and regulatory requirements, through excellence in

research, designs and standards by setting quality

objectives, commitment to satisfy applicable requirements

and continual improvements of the quality management

system to cater to growing needs, demand and expectations

of passenger and freight traffic on the railways through

periodic review of quality management systems to achieve

continual improvement and customer appreciation. It is

communicated and applied within the organization and

making it available to all the relevant interested parties.”

INDIAN RAILWAYS Centre for Advanced Maintenance Technology Maharajpur, Gwalior (M.P.) Pin Code – 474 005

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