Modernization of Block Working Using UFSBI

Presented By:

Deltron Equipment & Systems Pvt. Ltd.

26, Convent Road,

Kolkata-700014

Mob# : 9330378001 / 02 /03

Email: [email protected]

A Presentation on

Modernization of Block Working Using UFSBI 1. Introduction & Background of usage of UFSBI in East Central Railway

2. Understanding Universal Failsafe Block Interface (as per IRS:S-04/2012)

3. Installation, Troubleshooting and Maintenance of UFSBI

4. Various applications of UFSBI

5. Improvement in UFSBI as well as improvements in the applications of UFSBI

mailto:[email protected]

Background

Since UFSBI development in the year 1997 as a Block Interface to

Conventional Block Instruments it has come across a lot of application

developments to prove its mettle as a 16 I/O Fail-Safe Mux to reduce the

dependency on copper conductors

1. As a Fail-Safe Block Interface

a) With Diado TLBI – 3 Sets

b) In Double Line Blocks – 14 Set

2. As a Push Button type Axle Counter Block Instrument

a) In Single Line Blocks – 47 Sets

b) In Double Line Blocks – 117 Set

3. As 16 Input-16 Output Fail-safe Multiplexer

a) In Intermediate Block Sections – 8 Sets

Single Line Block Panel, 47

Double Line Block Panel, 117

16 I/O Fail-Safe Mux in IBS, 36

Auto Signalling, 0

Neal's Interface, 0

Diado TLBI Interface, 3

SGE Interface, 14

Single Line Block Panel

Double Line Block Panel

IBS

Auto Signalling

Neal's Interface

Diado TLBI Interface

SGE Interface

0 20 40 60 80 100 120 140

APPLICATION WISE DISTRIBUTION OF UFSBI IN EAST CENTRAL RAILWAY (APPROX.)

Danapur Div.38%

(72 Sets)

Samastipur Div.7%

(14 Sets)

Sonpur Div.3%

(5 Sets)

Mughalsarai Div.22%

(42 Sets)

Dhanbad Div.30%

(56 Sets)

DIVISION WISE DISTRIBUTION (%) OF UFSBI IN EAST CENTRAL RAILWAY (APPROX.)

UNDERSTANDING UFSBI

Definition:

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

states simultaneously over each direction between 2 locations separated by a distance

but connected over Quad -Cable , OFC or Radio .

Salient Features:

16 Input-16 Output Fail-Safe Multiplexer specially designed for use Railway Signalling

applications. Software & Hardware Validated as per CENELEC SIL-4 standards (complying

EN50126 / EN50128 / EN50129, EN50159-1) & approved as per RDSO/SPN/147/05 now

revised to IRS:S-104/2012

2 out of 3 Triple Modular Redundant (TMR) architecture ensuring safer system with high

availability (almost 100%) & reliability

Galvanically as well as optically isolated Inputs and transformer coupled , mutually

isolated unreferenced output with digital data-communication protocols makes the system

robust against induced electrical noises making it usable in RE areas

Hot standby power supply to make the system work uninterrupted , 24X7, round the year

System Architecture of UFSBI

UFSBI consists of the following parts:

1. Power Supply Units

2. The 2 out of 3 UFSBI-Digital System

a) Input Card

b) Output Card

c) CPU Card

d) Ctrl & Comm Card

e) Modem ( & Changeover)

f) Reset Box

3. Relay Rack / EBLM / Interface

Front View Back View

UFSBI-DS consisting of the following parts

DC-DC CONVERTER

Input card

CPU card

Control cum Communication Card (CCC)

Output Card

Reset Box.

MODEM.

UFSBI Alarm Panel

24V

INPUT

-12V

OUTPUT

+12V OUTPUT

5V OUTPUT

24V OUTPUT

PSMON

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

Amps

Output 1. 24V DC 4 Amps

2. 5V DC 4 Amps

3. +12V DC 1.5 Amps

4. –12V DC 1.5 Amps

The features of the power supply are:

Input-output isolation.

Input over voltage and under voltage

protection.

Output short circuit and over load

protection.

24V DC output is isolated from other outputs.

Ripple is less than 50mv at rated value.

Efficiency is more than 70%.

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.

DC – DC CONVERTER FRONT VIEW

DC – DC CONVERTER BACK VIEW

I/P RELAY 1- 8, O/P RELAY

1-8 & BIPR1 & BIPR2

INPUT CARD 1

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

INPUT CARD 3

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

INPUT CARD 5

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

I/P RELAY 9 - 16,

O/P RELAY 9 – 16

INPUT CARD 2

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

INPUT CARD 4

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

INPUT CARD 6

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

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.

Relays feed the input

processor

cards provided with

opto-isolators

INPUT CARD 1&2

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

I/P RELAY O/P RELAY &

BIPR1 & BIPR2

INPUT CARD 3&4

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

INPUT CARD 5&6

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

CPU CARD A

a. Input de-bouncing

b. Input Data validation

after inter-processor

communication

c. adding CRC code

CPU CARD B




communication

c. adding CRC code

CPU CARD C




communication

c. adding CRC code

The UFSBI system works on 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& CPU – C read the Inputs through Input Card 5&6.

Thereafter 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.

Input Card 1 & 2

1. Opto Isolation of

Relay Inputs

2. Noise & Surge

suppressor

Input Card 3 & 4


Relay Inputs

2. Noise & Surge

suppressor

Input Card 5 & 6


Relay Inputs

2. Noise & Surge

suppressor

CPU A

1. Input De-bouncing

2. Input data validation by Inter

Processor communication

3. Adding CRC codes

CPU B




3. Adding CRC codes

CPU C




3. Adding CRC codes

PICK UP

DROP OUT

TO MODEM

Control &

Communication Card

1. Data received from 3

CPUs on Time Division

basis

2. TTL to RS232 level

conversion

Complementary

sensing of an

Input Relay State

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.

MODEM MODEM

Dark OFC , E1 or E&M Voice Channel

(OFC / Microwave) or Quad cable)

Distance limited by a channel loss of 30dB

RS232C RS232C

The Communication Card of the UFSBI feeds the modems with

data which is transmitted via the telecommunication channel

Instrument at Location A Instrument at Location B

FROM

MODEM

OUTPUT

RELAY

Output Card

1. Hardware 2/3 Voter Unit

2. Output through DC to DC

converter

3. Decesion Read back by

each CPU

CPU A

1. Received data validation

by Processor

2. Performing 2 out of 3

Software Voting

Control &

Communication Card

1. RS232 toTTL level

conversion

2. Data sent to 3 CPUs

CPU B


by Processor


Software Voting

CPU C


by Processor


Software Voting

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

Output relay 1 to 8 and rest 9 - 16 number output relay is driven by Output card 2.

Relay feed to Output Card Connection

Output Cards at

Receiving ends drives

Relay outputs at the

other end

2/3 Hardware Voter

implemented using PLD

High

Frequency

Oscillator

OUT

OUT

Differiantial DC

OUTPUT

From CPU A

From CPU B

From CPU C

Opto-

Isolator

Transformer

Coupled

Switcher

Rectifier

Unit

Mechanism for Picking Up an Output Relay

MODEM FRONT VIEW MODEM BACK VIEW

Steady Red.

To Indicate the

MODEM Power ON

Condition

Steady Red to Indicate

The Carrier Detect

Flashing Red.

To Indicate the

MODEM receives Data

Flashing Red.

To Indicate the

MODEM Sends Data

Steady Red when

Modem Put in

LOOP position

Loop / Normal

Switch

To Test the

Modem

Data Connector

from Mother

Board to

Modem

MODEM

ON/OFF

Switch

PWR

IN

Line Connector

from MODEM to

OFC or QUAD

Cable

ANS / ORG Switch

To Select the

Modem mode

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

The Fig above shows the front and back view of the VF Modem. Modem works on 4

wire, Asynchronous, 2400 bps mode. Maximum permitted loss between two modem is

30db.

FRC

CONNECTOR

(Flat Cable)

I/P RELAY, O/P RELAY &

BIPR1 & BIPR2

INPUT CARD 1 & 2

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

INPUT CARD 3 & 4

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

INPUT CARD 5 & 6

a. Opt isolation of

Relay Inputs.

b. Conversion of

24V to 5 V

WAGO

TERMINAL

FRC

TERMINALFRC

TERMINAL

WAGO BOARD MOTHERBOARD

2nd Upper I/P Connector

(I/P -9 to I/P 16 Complementary) On

WAGO Board

1st Upper I/P Connector

(I/P -1 to I/P 8 Complementary)

On MB

1st Lower I/P Connector

(O/P -1 to O/P 8, BIPR1

& BIPR2 Complementary)

On MB

1st Lower I/P Connector

(O/P -1 to O/P 8, BIPR1

& BIPR2 Complementary)

On WAGO Board

1st Upper I/P Connector

(I/P -1 to I/P 8

Complementary) On

WAGO Board

2nd Lower I/P Connector

(O/P -9 to O/P 16 Complementary)

On WAGO Board

2nd Lower I/P Connector

(O/P -9 to O/P 16

Complementary) On MB 2nd Upper I/P Connector

(I/P -9 to I/P 16

Complementary) On MBO/P 1 to O/P 8

Relay DriveO/P 9 to O/P

16 Relay

Drive

MB to

MODEM

Data

Connector

MB 6 Pin

Power

Connector

BIPR1 & BIPR2

Relay Drive on

MB

BIPR1 & BIPR2

Relay Drive on

WAGO Board

WAGO BOARD TO MOTHERBOARD INTER-CONNECTIVITY

INSTALLATION TROUBLE-SHOOTING

AND MAINTENANCE

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 Communicatio

n 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 :

• 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 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

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

UFSBI ALARM PANEL FRONT VIEW UFSBI ALARM PANEL BACK VIEW

1. Relay Complementary Failure

2. Relay Forced Pick Up.

3. Relay Failed to Pick Up.

4. Communication Link Failure.

5. Cards or DC-DC converter Failure

Error 10

Error 11

W2

WAGO BOARD

M1

M1

W10

M3

M3W11

W3

I

N

P

U

T

1. Check if error code is shown in all 3 CPU’s or at least in 2 CPU’s.

a. Due to contact failure of Relays.

b. Due Terminal loose fitted.

c. Due to Flat Cable Cut.

2. If Error code is shown in only one CPU.

a. Change corresponding I/P card.

Failure Code Relay Name Corresponding WAGO No.

10 IN1 W2, W10

11 IN2 W3,W11

12 IN3 W4, W12

13 IN4 W5, W13

14 IN5 W6, W14

15 IN6 W7, W15

16 IN7 W8, W16

17 IN8 W9, W17

18 OUT1 W18, W26

19 OUT2 W19, W27

1A OUT3 W20, W28

1b OUT4 W21, W29

1C OUT5 W22, W30

1d OUT6 W23, W31


1E OUT7 W24, W32

1 OUT8 W25, W33

20 IN9 W64, W72

21 IN10 W65, W73

22 IN11 W66, W74

23 IN12 W67, W75

24 IN13 W68, W76

25 IN14 W69, W77

26 IN15 W70, W78

27 IN16 W71, W79

28 OUT 9 W80, W88

29 OUT10 W81, W89

2A OUT11 W82, W90

2b OUT12 W83, W91

• First check the condition of relay i.e Pick Up or Drop.

• Check the voltage with as per contact no. and corresponding Wago

terminal with respect to W1 terminal.

• If voltage is present Check the corresponding Flat Cable.


2C OUT13 W84, W92

2d OUT14 W85, W93

2E OUT15 W86, W94

2 OUT16 W87, W95

30 BIPR1 W34, W36

31 BIPR2 W35, W37

O

U

T

P

U

T

Error 80

Error 81

W47

W48

W50

W49

M2

M4

1. Check O/P indication comes in O/P card or not.

a. If Indication does not come change the O/P Card.

b. If Indication comes in O/P card but then also System shows fail to pickup

code then Check Corresponding Connectors, Terminals and Relay Coil.

WAGO BOARD

Failure

Code Relay NameCont. 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

Failure

CodeRelay Name

Cont. No. to be

checkedCorresponding WAGO No.

8E OUT15 R1, R2 W114, W115

8 OUT16 R1, R2 W116, W117

Please note that O/P 8 to O/P 16 are kept as spare for BPAC. So Fail

pick up code for O/P-8 to O/P 15 will not come in the UFSBI CPU’s

when used for BPAC.

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

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

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

Cable.

3. 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.

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 ensure 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 CPU’s.

• 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 reset to ensure that card is permanently damaged not a temporary hang.

• For Detailed failure Code Refer Failure Code List attached with the Manual.

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

MAINTENANCE SCHEDULE FOR UFSBI

Sr. No. Description ESM JE/SE SSE

1Check the Display in all 3 CPU's. It must display flashing O (ZERO) O (ZERO) indicates that the system is

healthy & functioning properly.F M Q

2Check 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 output of DC-DC converter and record all the output supply voltage & output level should

be as fallows : -

(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

5Check 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

8Check 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 yellowF M Q

9Check 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

MAINTENANCE SCHEDULE FOR UFSBI

14

i) If Single CPU fail indication appears on UFSBI alarm panel then check all 3 CPUs cards. If any one 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 UFSBI alarm panel it would be ON till the UFSBI functioning normally ( till BIPR1& BIPR2 picks up ) then rest the system. if not resetted then checked error codes shown on the CPU & the LED on the out put cards & the control & communication card & take the recommended actions by manufacturer

15 Check that all the relay 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

19Check 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

21Check that proper gasketing 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 Dataloggers. - - Y

25Ensure that all potential free contact of UFSBI ( power supply monitor , single CPU failure detection & single System failure detection ) are wired in Datalogger and extended to ESM's duty room.

- - Y

RECOMENDED METER: FLUKE 289 WITH TRUE RMS mV and dB measurement

ALTERNATIVE METER: FLUKE 115 WITH TRUE RMS mV measurement

APPLICATIONS OF

UFSBI

The various application of UFSBI as approved by RDSO are

given below:-

1. As an fail safe signal Interface for the following Block

Instruments to work on OFC / Microwave.

a. SGE Double Line Block Instrument.

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

c. DIODO TLBI Single Line Block Instrument

d. Token Less Push Button type Block Instrument.

2. As an Fail-safe Mux in Block Proving with Axle Counter (As

Per IRS S:105/2012).

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

Gate / Slot transfer application to reduce the number of

copper conductors.

In this application, the UFSBI senses the DC voltages as well as

the polarity of the voltage (if required) generated from different

Block Instruments through different isolating relays inside

UFSBI cabinet.

These relays are called Input relays and these relays are

numbered as M1, M3, M5 and so on.

UFSBI then pickup corresponding Output relays at other end

and those relays are named as M2, M4, M6 and so on.

Depending upon the output relays picked up the block

instruments works accordingly.

Different numbers of I/O relays are required for interfacing

different type of Block Instruments

• SGE – 8 I/O

• NEALS – 6 I/O

• DIODO TLBI – 8 I/O

• Push Button Type TLBI – 7 I/O

The Name of the application is Block Proving with Axle

Counter Using UFSBI (As per IRS S: 105/2012)

In this application, the UFSBI is and integral part of the Block

Instrument.

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

The detailed functionality is as followed.

1. 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.

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

information.

3. The interlocking circuits and input/output through Q-series relays

provide galvanic isolation, making the system suitable in both RE &

Non- RE sections.

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

or microwave without hampering the fail-safety of the operation.

5. 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.

1. Why do we need a New Block Instrument to work in multiple

communication media like OFC / Microwave & Copper conductor on

long Block Section ?

A. Adoption of different modern communication system in the railway

establishment of Indian & other developing countries like

Bangladesh, Sudan, Myanmar etc. increased the need for Block

Instruments that can work in these different communication media.

B. The most important part is the total system (Including UFSBI, Axle

Counter and Telephone) can now work on DARK FIBRE also. We need

3 cores (out of 24 Cores) for Single Line and 4 cores for double line

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

2. What is the advantage of having a Push Button type Block Panel for

operation ?

A. Easy to operate & maintain .

3. What is the use of Axle Counter in Block Proving ?

A. Uses Axle Counter for Block Occ / Free verification & Last Vehicle

Check.

The system works as per Absolute Block system, incorporating the features of Block

Proving by Axle Counter to control the movement of trains on single line block section

from one block station to another.

Principle of working

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 obtain 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.

DOUBLE LINE

SGE TYPE

SINGLE LINE IRS

TYPE PUSH

BUTTON BLOCK

INSTRUMENT

SINGLE LINE

TOKENLESS HANDLE

TYPE TLBI (IRS S 98-2001)

BPAC (BLOCK PANEL & UFSBI)

RDSO/SPN/188/2004

BLOCK OPERATIONRotary

Commutator

Type

Push Button TypeRotary Handle & Block

Needle typePush Button Type

BLOCK MEDIA Copper Cable Copper Cable Copper CableCooper 6-Quad Cable / Voice channel

of P-Mux / Microwave / E1/ Dark Fibre

BLOCK

COMMUNICATION

DC earth return

type

Electrical Pulse

CodingAnalog FM TX-RX

Fail-safe Digital Communication at

2400 bps. Optional Media fall-back

with Auto Media C/O

BLOCK LENGTH10-12 Km

(typically)10-12 Km (typically)

10-12 Km (max.) on 0.9mm

Quad cable

Upto 25 Km (typically) on 6Q-Cable

Upto 50 Km typically on OFC

Upto 30 Km typically on mW Radio

RE COMPATIBILITYworkable in RE

area

Non- workable in RE

areaWorkable in RE area Workable in RE area

TIME FOR TAKING LINE

CLEAR, TOL & LINE

CLOSE

1 – 2 min.

(approx.)20 – 30 sec. (approx.)

2 to 3 min.

(approx.)1-2 sec. (max.)

LAST VEHICLE

VERIFICATION &

LINE CLOSE

Manual Manual ManualAutomatic (Auto TOL &

Auto Line Close)

OPERATOR

INVOLVEMENT PER

TRAIN MOVEMENT

3 times (taking

Line Clear,

Putting system

to TOL and

then Line

Closing)

2 times (taking Line

Clear and then Line

Closing)

2 times (taking Line Clear

and then Line Closing)Only once ( for taking Line Clear)

Typically 10-20 Km

UFSBI - 1

Block Interlocking

Circuit with

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

free contacts)

AXLE

SENSOREVALUATOR

SSDAC - 1

4 4

UFSBI - 2

Block Interlocking

Circuit with

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

free 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 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)

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)

Typically 10-20 Km

UFSBI - 1

Block Interlocking

Circuit with

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

free contacts)

AXLE

SENSOREVALUATOR

SSDAC - 1 (DN)

4 4

UFSBI - 2

Block Interlocking

Circuit with

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 free 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

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: 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

MUX / UFSBI Status Fail Indication: Red

Communication Link Fail Indication: Yellow

445

350

550

“Bell” Button: Black

“Train Going To” Button: Red

“ACKN” Button: Black

“Cancel Co-op” Button: Green

“Cancel” Button: Yellow

“Shunt Release” Key

SMs Key

Counter Cancellation

Call attention Buzzer Intermittent

Train Entry / Exit Buzzer Continuous

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

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)

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)

SL.

NO.

RELAY

TYPE AND 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 train sending station.

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 stationDrops in any of the under-

mentioned cases:


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.

SL. NO. RELAY

TYPE AND NORMAL

STATUS DESCRIPTION

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 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.

Drops in any of the under-mentioned cases:


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.

SL. NO. RELAY

TYPE AND NORMAL

STATUS DESCRIPTION

19.

120 EJ (SL &

DL)

Electronic Time delay unit

(Fail Safe)

Timer unit for cancellation time of 120 seconds.

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.

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

SL. NO. RELAY

TYPE AND NORMAL

STATUS DESCRIPTION

19.

[D]AZTR (DL) QNA1, 8F.8B

PICK UP

Block Section track Relay of dispatch line.




19.

[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):-

QN1 – 38, QNA1 – 14, QL1 – 4, TIMER - 2

Sl.No. Test Observed result

(OK / NOT OK)

01. SM’s Key Control on Line Clear

02.Refusal of Line Clear enquiry through Shunt Key of EKT / Shunt Release Key of SMBlock Panel Control

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

04. Cancellation 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 LineClear

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 Advancestarter signal and it’s all controls are normal.

11. Shunting Operation not possible in TCF side and after taking off Advance starter inTGT side.

Sl.No. Test Observed result

(OK / NOT OK)

01. SM’s Key Control on Line Clear

02. Refusal of Line Clear enquiry through LCB Key

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

04. Cancellation 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 LineClear

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 untilAdvance starter signal and it’s all controls are normal.

OFC based Signalling Schemes for IBS & ABS

In this application the number of Used I/O may vary from 1 to 16.

The I/P sensing and Output driving relays may be placed inside or outside

UFSBI cabinet.

The details of this application is as follows

Background:

a. IBS was conceived years ago by Indian Railway S&T engineers for increasing

the line capacity by pushing 2 trains in the Block Section at a time.

b. In order to achieve this it was necessitated to extend the IB-Signal driving

relays like IB- DR, HR, Axle Counter Reset, IB-Reset controls from “Rear Station”

to IB-Hut. While from IB-Hut the Aspects Proving relays (ON-ECR / OFF-ECR),

BPAC-VR, IB-OV TPR etc. was required to be repeated at “Rear Station”. LV-

verification & Reset Co-Operation was exchanged between stations.

c. IBS was traditionally implemented by exchanging relay states on Copper

Signalling cable with cutting relays after regular intervals. Later on the same

was improvised on Quad Cable with VF Transformers using Phantom circuits

in some railways.

Problems Faced:

1. Both Signalling / Quad Cable based IBS required extensive involvement

of Outdoor field cabling needing substantial cost & time.

2. In IBS installed with Outdoor Signalling cable , maintenance of cable and

cutting relays along with power supplies spread over the 10-12 Km

block section was extremely difficult.

3. In IBS installed with Quad cable, over heating of the core in VF

transformers used in Phantom Circuit not only caused excessive core

heating but also repeated failures, making it difficult to maintain.

4. In case of accidental or cable cut due to theft, the entire IBS operation had

to remain failed, owing to non-repetition of relay states. Although in later

years dual SSDAC / HA-SSDAC managed to achieve media redundancy

with regard to track detection, but unless media redundancy of relays is

achieved, this was of no use.

Objective of Solution Offered:

1. The system has to be efficient, safe & reliable in order to improve sectioncapacity without affecting punctuality.

2. Main obstacle in IBS implementation was seen to be the extensiveinvolvement of cable laying and related time, as well as cost. So, it was verymuch required to reduce cable laying time and enable IBS commissioningjust utilizing spare 4-conductors of the sectional Quad Cable. Rest beingonly simple indoor activities.

(Eventually commissioning of IBS was made practically feasible in 7-10 days inheavy monsoon, when cable laying was a impossible )

3. To improve reliability of the system, a stand-by communication facility is tobe provided i.e. One communication facility through 6-Quad cable andanother one through OFC.

Advantages of using UFSBI in exchanging relay states in IBS

1. This RDSO scheme facilitates commissioning of new IBS installations with ease,

with minimum outdoor activities, just be using spare Block Quad cable.

2. A dedicated OFC if laid for signalling in lieu of copper cables for IBS

operations using UFSBI, is preferred due to immunity to electrical interferences,

EMI/EMC, Lighting Surges, Aging, Ingress of Moisture and substantially low

cost (causing it to be less theft prone).

3. This harnesses the true benefits of redundant media operation of HA-SSDAC /

Dual SSDAC or Dual MSDAC, through use of UFSBI for relay state transmission

with Automatic Media Changeover(Although some alternative items showcase features of relay exchange but are not

approved to the requirement of RDSO under IRS:S-104/2012 Ver.0)

4. The Auto Change-over allows seamless transition between Quad Cable system &

OFC based system, continues IBS working even if physical Quad cable / OFC

damaged

Approval of UFSBI for 16 I/O Mux in

IBS…

IMPROVEMENTS IN

UFSBI

To Improve the UFSBI performance dual approach has been taken

1. Improving the Individual UFSBI system performance by adding upmore redundancy and protective devices. Details of which are givenbelow.

2. Improvement of the application of UFSBI by adopting dual UFSBImethod for IBS or ABS application or to improve the systemperformance and reduce relays in case of Block Proving with axlecounter EBLM has been introduced. Details these improvementsdiscussed below.

• A combination of Class C & D SPD for Power Line and Class D SPD for

Data Line from OBO Betterman

24V +ve from IPS /

Batt. Charger

24V -ve from IPS /

Batt. Charger

EARTH (<1)

V20C 3PH 75V

Type II / Class C SPD

VF 24 AC/DC

Type III / Class D SPD

24V -ve to DC-DC

Conv. I/P of UFSBI via

LPF Module

EARTH (<1)

24V +ve to DC-DC

Conv. I/P of UFSBI via

LPF Module

+ve Loop using

1.5 sq. mm Copper

wire (Red)

-ve Loop using

1.5 sq. mm Copper

wire (Black)

EARTH LOOPING

WITH 4 sq. mm Copper wire (Green)EARTH LOOPING

WITH 4 sq. mm Copper wire (Green)

U F

S B

I (D

C-D

C C

on

v.

Inp

ut)

IPS

or

BA

TT

ER

Y C

HA

RG

ER

EARTH (<1)

MO

DE

M

Tx +

Tx -

Rx +

Rx -

Tx +

Tx -

Rx +

Rx -

470

600

470

600

Su

rge

Arr

es

tor

Mo

du

le (

SA

M)

of

UF

SB

I

All Connections done with 7/0.2 PVC

coated copper wire

EARTH (<1 )

MDP 4D / 5T

Type III / Class D SPD for Communication Lines

EARTH LOOPING

WITH 4 sq. mm Copper wire (Green)

• Automatic Modem / Media Changeover for working UFSBI redundant media

( viz. OFC Voice Ch. / Quad Cable or Radio / OFC Voice Ch. )

AUTO

CHANGEOVER

POWER

ACTIVE

CH-1

CH-2

HEALTH

CH-1

OK

CH-2

OK

MODEM

UNIT-1

(any make)

RS-232 (Tx/Rx/Gnd)

Comm. Channel (4-Wire

Voice Ch. on OFC/Microwave

MODEM

UNIT-2

(any make)

1-Quad Cable

RS-232 (Tx/Rx/Gnd)

To UFSBI

AUTO

CHANGEOVER

POWER

ACTIVE

CH-1

CH-2

HEALTH

CH-1

OK

CH-2

OK

OFC to Serial

Media

Converter

RS-232 (Tx/Rx/Gnd)

Direct Single Mode OFC

MODEM

UNIT-2

(any make)

1-Quad Cable

RS-232 (Tx/Rx/Gnd)

To UFSBI

AUTO

CHANGEOVER

POWER

ACTIVE

CH-1

CH-2

HEALTH

CH-1

OK

CH-2

OK

MODEM

UNIT-1

(any make)

RS-232 (Tx/Rx/

Gnd)

MODEM

UNIT-2

(any make)

1-Quad CableRS-232 (Tx/Rx/

Gnd)


To UFSBI

AUTO

CHANGEOVER

POWER

ACTIVE

CH-1

CH-2

HEALTH

CH-1

OK

CH-2

OK

OFC to Serial

Media

Converter

RS-232 (Tx/Rx/Gnd)


Digital

Microwave

radio (2.4 GHz)

RS-232 (Tx/Rx/Gnd)

Radio Antenna

To UFSBI

WORKING CONFIGURATIONS OF AUTO CHANGEOVER UNIT FOR REDUNDANT MODEM WORKING ON DUAL

CHANNEL (OFC / MICROWAVE RADIO) OR QUAD CBALE

AUTO

CHANGEOVER

POWER

ACTIVE

CH-1

CH-2

HEALTH

CH-1

OK

CH-2

OK

FRONT VIEW

DB9 (F)

UFSBI

MEDIA 1 MEDIA 2

DB

9 (

M)

DB

9 (M

)

ON/OFF

switch

3U

10T

BACK VIEW

Front View Rear View

The Device to ensure Media Redundancy for UFSBI

The functional advantages of the Automatic Media Changeover

Seamless changeover between the primary and the secondary media

Very low latency media switchover (<1 ms), thereby ensuring no link failure of UFSBI.

Continuous monitoring of both working / non-working media providing potential freecontact for recording media performance over networked data logger.

In-system network performance / failure logger

Note: The same media changeover unit may be used for other devices like digital axle-counter provided thecommunication packet format (like size, speed, number of Start /Stop bit etc. are provided

• 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

Reducing the Size (It is even possible to mount a pair ofequipment in a enlarged cabinet thereby minimizing thefloor space usage)

It is also possible to mount block panels on top of thesecabinets just like Podanaur Token less Block Instruments

Reduction of relay contact related failures.

Reduction in wiring.

Reduction in maintenance.

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

Enhanced Availability which is only achieved by parallelwiring of relay rack at site thereby reducing time ofinstallation.

COMPARISON

BASIS

BPAC USING UFSBI WITH

RELAYS


EBLM

SSBPAC

INTERLOCKING

LOGIC RESOLVE

ARCHITECTURE

USING RELAYS USING CPLD. USING

MICROCONTROLLER

COMMUNICATION USING 16 I/O UFSBI USING 16 I/O UFSBI INBUILT FAIL SAFE

COMMUNICATION

REDUNDANCY COMMUNICATION: 2/3

WITH AUTO C/O.

LOGIC: NO.

COMMUNICATION: 2/3

WITH AUTO C/O.

LOGIC: 2 X 2OO2.

COMMUNICATION:2/3

LOGIC RESOLVE: 2/3

SAFETY COMMUNICATION: SIL-4

LOGIC: Q-SERIES RELAYS

COMMUNICATION : SIL –

4

LOGIC: SIL – 4

COMMUNICATION : SIL –

4

LOGIC: SIL – 4

No. OF RELAYS 29 FOR DL

31 FOR SL

5 FOR DL

5 FOR SL

HOT SWAP

FACILITY

NONE. COMMUNICATION – NO

LOGIC – YES

COMMUNICATION – NO

LOGIC – NO

POWER

REQUIREMENT

24V / 5A 24V/5A 24V/5A

COMPARISON

BASIS


RELAYS


EBLM

SSBPAC

SPARE

COMMUNICATION

CHANNEL

AVAILIBILITY

9 CHANNELS 9 CHANNELS 2 CHANNELS

FUNCTIONALITY Dedicated for Absolute

Block Operation

Dedicated for Absolute

Block Operation

Dedicated for Absolute

Block Operation

Advantages of using Redundancy in UFSBI

Electronics

1. This Redundancy is provided by use of 2

independent UFSBI systems such that If any, one

UFSBI units fails, it does not affect train running.

2. If any system fails / hangs due to external /

internal fleeting faults it automatically restarts

and recovers failed UFSBI Electronics from

error/failure, provided

3. The UFSBI Electronic units are coupled through

the synchronized Input states that are fed into

the systems from station / IBS / ABS interlocking

circuits from common relay contacts

4. The outputs are driven by both systems in

parallel so that failure a single UFSBI Electronics

does not causing any functional failure

5. UFSBI system and Input / Output relay status can

be monitored with datalogger

Modernization of Block Working Using UFSBI

Documents

Transcript of Modernization of Block Working Using UFSBI