OFC Based Signaling systems

OFC Based Signaling systems

Dy. CSTE/CON/SC

April 21, 2023 Dy.CSTE/Con/SC 1

A signal is a device to communicate to Loco Pilot to go ahead or stop.

Signalling system facilitates the safe and efficient movement of trains on the railway.

1ROLE OF SIGNALLING IN RAILWAYS

Key Lock Inter locking

The human

element :

• Setting of the point and locking is entirely manual through key and lock system.

• Signals controlled by levers situated at the signals.

2

Mechanical SignalingOperation of Points

and Signals from a fixed location with group of levers through rigid connection (Rod / Wire)

System is interlocked mechanically by grouping the levers.

3

Electrical Signaling

Panel Interlocking• Signals controlled

by Operation from a Panel through cables by electrical means.

• Each function to be operated individually

• Interlocking is achieved through relays.

4

Route Relay Interlocking

Individual operation is

avoided.

Final function is achieved

though pre-defined automatic operation

.

5

IBS / Automatic signaling

IB / Automatic Signaling enhances the section capacityAutomatic signals are self controlled and avoids human operations

6

Electronic Interlocking

Operation is done through computer or Panel

Microprocessor based interlocking system

Interlocking is achieved through Software.

7

Modern signaling

TPWS: Automatic train protection and prevents collision.

Avoids SPAD cases.Transmits advance

information to the Driver & controls the engine.

8

Advanced Signaling

ATC-Automatic Train Control., CTC –Centralized Traffic Control, Moving Block and Radio Block.

9

OUTLINE on OFC based systems

• Intermediate Block signals on OFC using EI.• Intermediate Block Signals on OFC using UFSBI.• OFC based EI working on remote/local operation.• OFC based auto signaling.• OFC based ASM-LC Gate Voice logging system.• OFC based SP/SSP for Remote Control• Commercial exploitation on Passenger Amenities

11Dy.CSTE/Con/SCApril 21, 2023

OFC Based IBS using EI


COMMUNICATION FACILITIES REQUIRED AT IBS


IB ROOMSTN-A STN-B

DN IB AC DN IB BPAC

UP IB PHONE

UP IB AC UP IB BPAC

DN IB PHONE

RTU

UP IB RESET

DN IB RESET

DN IB BPAC RESET

UP IB BPAC RESET

OFC FROM STATION TO STATION

6 QUAD 6 QUAD

COMMUNICATION FACILITIES CAN BE EXTENDED THROUGH OFC


IB ROOMSTN-A STN-B

DN IB AC DN IB BPAC

UP IB PHONE

UP IB AC UP IB BPAC

DN IB PHONE

RTU

UP IB RESET

DN IB RESET

DN IB BPAC RESET

UP IB BPAC RESET

OFC FROM STATION TO STATION

ALTERNATE OFC ALTERNATE OFC

PROTOCOLS


1. IB PHONE: VOICE COMMUNICATION

2. IB UNIVERSAL AXLE COUNTER: 2 wire E&M.

3. IB DIGITAL AC: V.21 modem communication (2 wire).

4. IB BPAC: V.21 modem communication (2 wire).

5. IB RESET MODEM: V.21 modem communication (2 wire).

6. RTU: Analog Channel of OFC, digital microwave and analog microwave or 64KBPS data channel on OFC or digital microwave ( 4 wire E&M)

INTEGRATION OF COM EQUIPMENT AT IBS

• MODEL-1:– Using Existing STM-1’s and PD Muxes

• MODEL-2:– Using Dark fibers

• RAD Make MP 2104.• Moxa Make Manageable Switch EDS-405A/408A

Series


Model-1Using Existing STM-1


STN-A STN-BEXISTING OFC

NEW OFC

IBSIBS

ADD THIRD PORT

PD MUXPD MUX

PD MUXPD

MUX

PD MUXPD

MUX

2 Port STM-1 2 Port STM-1

• Drawbacks:– Dependent on existing power supply at OFC Huts.– Reliability of STMs and PDMUX for safe

communication.– Copper working between OFC Hut to Relay Room.

• Advantages:– Remote Management of STMs. – Alternate Path for existing telecommunication.


Model-1Using Existing STM-1

Model-2 Dark Fiber


SPLIT CARD FILE AT IBS


Integration of signaling

• One EI unit can maintain two discrete redundant network links:• Step 1: Data packet ‘P1’ delivered by EI - A1 is duplicated and transmitted

on Comm board ports E1 & E2• Step 2: EI – A2 Ethernet Port E2 receives data packet ‘P1’ before Ethernet

Port E1• Step 3: When EI – A2 Ethernet Port E1 receive data packet ‘P1’ it is

discarded due to duplicate ID

April 21, 2023 Guntakal Division 21

E1

E2

EI- A1

E1

E2

EI – A2

Network - A

Network - B

P1P1

P1

P1

P1

P1

P1

P1Packet Discarded

COMPLETE SCHEME


Electronic Interlocking (EI) split card file


EDS 408A Switches and NPort 5650I-8-DT


Front View of EI Card file, Multiplexer and FMS in a rack.


Panel Indications to ASM regarding redundant system failure even at IBS and

fiber break with alarm.


Front view of the entire rack at Srikalahasthi station.


Manageable Switch EDS-408A Series

2. Terminal block for power input

6. Power input PWR1 LED

7. Power input PWR2 LED

8. Fault LED

9. MSTR/HEAD: LED indicator

10. CPLR/TAIL: LED indicator

11. 10/100BaseT(X) ports

12. TP port’s 100 Mbps LED

13. TP port’s 10 Mbps LED

14. 100BaseFX ports

15. 1 FX port’s 100Mbps LEDs

16. Model Name


Manageable Switch EDS-408A Series

1.Grounding screw

2. Terminal block for power input

3. Console port

4. DIP switches

5. Heat dissipation vents

17. Screw hole for wall mounting kit

18. DIN-Rail kit


MTBF: 11,02,845 hrsWarranty: 5 years

Remote Monitoring UnitN Port 5650I-8-DT


RAD Make MP 2100


MP 2100 GENERAL VIEW

• 16 SLOTS• ADAPTIVE TIMING FACILITY.

CRYSTAL OSCILLATOR WITH 32PPM.

• POWER: 230/110 V AC, -48V/24V DC (INTERNAL JUMPER SELECTION)

• REDUNDNACY: One logic/power card can be removed while working.


MP2100 REAR VIEW


MP 2100 POWER SUPPLY


MP 2100 CONTROL SUBSYSTEM


ETHERNET PORT

RS 232 FOR SYSTEM MANAGEMENT

• REPLACING CL CARD DURING FAILURE:– STAND BY CARD CAN

BE REPLACED WITH OUT DISRUPTING SERVICES.

– FIRST FLIP TO STANDBY MODULE BEFORE REPLACING ONLINE MODULE.

Cost Analysis

Existing systemS.No. Description of

the itemCost in ‘000 of Rs.

1 6 quad cable 3000

2 30 core cable 3750

3 Power cable 1500

4 Location boxes & accessories

625

Total 8875

Proposed SystemS.No Description of


1 OFC cable 780

2 Hdpe duct 675

3 Communication equipment

1200

4 Solid state interlocking

4000

Total 6555


Typical section length: 12KM

Failure Analysis As Per SFR

• One failure for Past 20 Months.

• Commissioned in Nov-2012.

17.04.2013: Up IB Axle Counter Failed.

Reason: VR relay Contact Problem.


Failure Analysis IB Passing at Danger


S.NO PB-1

DATE COUNTER NUMBERS REMARKSFROM TO FROM TO

1 21.01.13

29.12.13 000067 000075 RGM working, Duomat Machine, Cable meggering, AC o/p selection switch modification to IPS

2 22.01.14

--- 000075 000078 Cablemeggring

3 16.05.14

---- 000078 000079 B/I failed

Issues need to be addressed

• How to bring reset command?

• Addition or modification of logic during redundant axle counters, IB circuit modification.

• MP2104 to be replaced with MP2100 for complete security.

• Hot Stand by conversion is not done.


Why reliability is achieved?

• Failure rate is proportional to number of components required to be function with in their characteristics.

• Normally 12 pairs of signalling cable, 4 pairs of 6 quad cable, power cable is required to be available round the clock for working of IB. This will increase the probability of failure. With OFC only two pairs are required and when path redundancy is provided the probability is also reduced by ½.


OFC BASED IBS USING UFSBI


OFC Based IBS using UFSBI


HA SSDACHA SSDAC HA SSDAC HA SSDACMAPLE 4C

MAPLE 4C

Relay Inputs

16 In / 16 Out

Dark Fiber

Main link Fiber

Protection Path OFC

ECATECAT

Or / Dual SSDAC

UFSBIUFSBI

Cost Analysis

Existing systemS.No. Description of


1 6 quad cable 3000

2 30 core cable 3750

3 Power cable 1500


625

Total 8875

Proposed SystemS.No Description of


1 OFC cable 780

2 HDPE duct 675


1230

4 UFSBI 1600

Total 4285


Typical section length: 12KM

MAPLE-4C Front and Back Plane


MAPLE 4C Back Panel

MAPLE 4C Front Panel

E1’s LED indication Console SNMP Port E1’s LED indication Console SNMP Port

4 E1 uplink Slot 1 Slot 2 Slot 34 E1 uplink Slot 1 Slot 2 Slot 3Max. FXO/FXS channels : 30, Max E&M channels : 24, Max V.35 channels : 3

E CAT-01 Black Plane


BACK PANEL – ECAT 01L

FRONT PANEL – ECAT 01L

LED Indications

E1 Ports

Ethernet Port

OFC up links

Little View NMS


Windows-Package based Centralized Network

Management Application to manage

MRO-TEK TDM products family

Java based compliant system supporting

SNMPv1, v2c and v3 standards

Client-Server architecture (Multiple clients can access a single server simultaneously)

Highly scalable for growing networks (Manages up to 20000 nodes)

OFC BASED EI WORKING ON REMOTE/LOCAL OPERATION


Centralized and Distributed Architecture of EIs

• Reference: TAN No. STS/E/TAN/3008 dated 31.03.2014.

• Distributed architecture for EI shall be adopted by IR for Interlockings with more than 50 routes while centralized architecture may be used for interlocking routes upto 50.



• For Green field Projects:

• New line, doubling, gauge conversion.

• Centralized EI with OCs at way side stations may be used which shall have provision of local as well as centralized operation.



• For up gradation of interlocking on branch lines with Object controllers at way side stations and signal controlling VDU from signal control centre for operation.



• The architecture and distribution of object controllers may be made Line/Zone wise so as to result in minimum repercussion to traffic in case of failure of any Object Control Module or the power supply or its connectivity to Electronic Interlocking.



• All level crossing gates in the block-section, IBSs, Automatic Block Signals and BPAC may be interlocked using Distributed architecture with Object controllers.


• Data Communication equipment shall be provided in redundant mode with fault tolerant working.

• Such works should be taken up on complete section as a whole.



• Configuration of Distributed EI.

• Will present Parbhani to mudhked doubling CTC type architecture in next presentation.

• Tentative model of Centralized and Distributed Architecture of EIs submitted by medha to RDSO.



OFC BASED AUTO SIGNALLING


OFC Based Auto Signalling


EC

MultiplexerMultiplexerMultiplexerMultiplexer

Up Entry 3 Up Entry 5Up Exit 1 Up Exit 3

Up Entry 6Up Exit 2 Up Exit 4Up Entry 4

RTU RTUEC

EC


EC

MultiplexerMultiplexerMultiplexerMultiplexer

Up Entry 3 Up Entry 5Up Exit 1 Up Exit 3

Up Entry 6Up Exit 2 Up Exit 4Up Entry 4

RTU RTUEC EC

EC

Multiplexer Multiplexer Multiplexer Multiplexer

Dn Entry7Dn Entry 9 Dn Exit 5Dn Exit 7

Dn Entry 10 Dn Exit 6Dn Exit 8 Dn Entry 8

RTURTU ECEC

OFC Based Auto Signalling

Cost Analysis


• Existing system

S.No. Description of the item

Cost in ‘000 of Rs.

1 6 quad cable 550

2 30 core cable 750

3 Power cable 300


625

Total 2225

• Proposed SystemS.No Description of


1 OFC cable 156

2 HDPE duct 135


1600

4 UFSBI 1600

Total 3491

OFC BASED ASM-LC GATE VOICE LOGGING SYSTEM.


Centralized Voice Logging System

• Problems in existing system: Several unusuals were noticed in the recent past where gateman and ASMs were not following proper procedure in train operations and the level crossing gates were kept open to road traffic.

• A Centralized voice logging model for monitoring ASM/Gate Man Communication is developed by this unit.


Centralized Voice Logging System


SDH

Way Side Station

E1

Master Phone : Station Master

LC Gate Phones

Port 2

Individual stations groomed into E1

Voice logger with individual Ports

E1

FxS

FxO

FxO FxO

E1 - 1E1 - 2E1 - 1 E1 - 3 E1 - 4

Central Site

Tapped at cable hut

MAPLE 4 – at the OFC hut - front panel

1. The STM E1 is terminated in the krone available at the cable hut from where it will connected to the MAPLE 4 – a 10 Way Krone is already provided at the cable.

2. The ASM – LC gate phone copper wire also goes through the cable hut – which is tapped and kroned.

3. Power Supply for MAPLE 4 is -48VDC or 230VAC – at cable hut -48VDC is available.


MAPLE 4

MAPLE 4 – at the OFC hut - Back panel


E1 Port of MAPLE 4 is kroned where we have kroned the STM E1. The FxO port is kroned where we have already tapped and kroned of the ASM LC gate phone At each cable hut we will have two E1’s – terminated on the krone

FxO Port

FxO Module

Central Voice logger


Front Plane16 x 4 or 8 x 8 portsStorage: 500 GB x 2Compression ratio: 0.7

Screen providing the details of recordingOff hook : starts recording, On hook: records for 7 seconds and disconnects.

MAPLE 4C

Recorded Audio

Extension of SSP/SP/TSS Communication Data on Fiber


Station: Cable Hut

RTU

MAPLE 4C

ECAT 01

ECAT 01

PDMUX

MAPLE 4C

FIBER

RCControl phone: 4W

EC

Auto Phone

SSP/SP

ETH

4W & Phone Input

EC : Emergency Socket

http://2.imimg.com/data2/CK/JK/IMFCP-554678/tele_control_phone_4wire-250x250.png

Centralized IIPS with remote diagnostics and advertising


PC-2PC-1

16 PORT SWITCH

MediaConverter

MediaConverter

24 PORT MG SWITCH

PC-2PC-1DX509 MG

SWITCHASMI_52

ASMI_52 STMCTOSTM

GTLOptical FiberC

AT-

5

PORT-1

CA

T-5C

AT-

5C

AT-

5C

AT-

5

P O R T - 9

14/26/1

C A T - 5

CA

T-5C

AT-

5

C A T - 5

PC-2PC-1DX509 MG

SWITCH

STMKHT

STM GTL

CA

T-5CA

T-5

CA

T-5

PORT-2

7/2

4/3

CT

O1K

HT2

PC-2PC-1DX509 MG

SWITCH

STMHX

STM GTL

CA

T-5C

AT-

5

CA

T-5

14/3

4/2

HX3

PORT-3

CA

T-5

PC-2PC-1DX509 MG

SWITCH CA

T-5 G

Y4

MediaCon(CCU)

STM GY

STM GTLP O R T - 4

CA

T-5

27/129/2

PC-2PC-1DX509 MG

SWITCH CA

T-5C

AT-

5

AT

P5

STMATP

14/1

STM GTL

14/8

PC-2PC-1DX509 MG

SWITCH CA

T-5C

AT-

5

MediaConverter

Me

dia

Co

nve

rte

r

MediaConverter

P O R T - 6

C A T - 5

GT

L6

PO

RT-

5

Optical Fiber

Optical Fiber

Optical Fiber

Optical FiberOptical FiberO p ti c a lF i b e r

Optical Fiber

Op

tic

al

F

ib

er

C e n t r a l c o n t r o l

4/2 Copper

FiberBox

Media(OFC)

CA

T-5

Optical Fiber

Conclusion

• An additional OFC shall be laid all along the section on alternate path priority wise to improve signal reliability with 2.3 lakhs per Km in all IB sections.


Cost Break up/KmS.No Description of


1 OFC cable 78

2 HDPE duct 67

3 Trenching, Laying and Blowing

60

4 Fixed costs/Km 25

Total 230

THANK YOU

69

OFC Based Signaling systems

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Transcript of OFC Based Signaling systems