GOVERNMENT OF INDIA, MINISTRY OF RAILWAYS RESEARCH … · single private number (PN) to all the...

of 47 Effective from RDSO/SPN/TC/49/2020 Version. 1.0 D2

GOVERNMENT OF INDIA, MINISTRY OF RAILWAYS

RESEARCH DESIGNS & STANDARDS ORGANISATION MANAK NAGAR, LUCKNOW-226011

SPECIFICATION FOR

LEVEL CROSSING GATE CONTROL AND MONITORING

EQUIPMENT BASED ON WIRED & WIRELESS (VHF )

COMMUNICATION.

Specification No. RDSO/SPN/ TC-49/2020 Ver. 1.0

Issued by

TELECOM DIRECTORATE


Document Data Sheet

Title of Document

: LEVEL CROSSING GATE CONTROL AND MONITORING

EQUIPMENT BASED ON WIRED & WIRELESS (VHF )

COMMUNICATION.

Prepared By

: Shri N.K. Varma

Director / Tele -1

Approved By

: Shri D.K. Singh

Executive Director / Telecom

Abstract

This document specifies technical specifications for LEVEL CROSSING GATE CONTROL AND MONITORING EQUIPMENT BASED ON WIRED & WIRELESS (VHF )

COMMUNICATION.

Document Control Sheet Serial

No.

Date of

Amendment

Amendment /

Revision

Reasons for Amendment

1. 10 -10 -2003

49/2003

Ver. 1.0

Mission No 13: Improving safety at Level Crossings

2. 12-05- 2005

49/2003

Ver. 2.0

For implementation of suggestion given by Traffic &

Track Directorate as well as feedback from field trial.

3. 12-3- 2007

49/2003

Ver. 3.0

i To incorporate Voice Logging feature in the ASM Unit

ii. Standardization of Connectors and Terminals

iii. Power Supply input range

4. 25-03-2013 49/2012

Ver 0.0

To incorporate recommendation of committee formed for

revision of specification and recommendation of TCSC.

5. 22-01-2015 49/2003

Ver. 3.0

Rev-1

To incorporate Mike in the ASM Unit for Voice messaging &

provision of Gateman Specific Request Panel (GSRP) to

display PN of each closing gate on the basis of

recommendation from ECoR,SCR,SER& SECR.

6. --- 49/2020

Ver 1.0

To club 4 and 5 above. Part A and Part B has been introduced.


INDEX

SECTION REQUIREMENTS PAGE No

1 INTRODUCTION 5

Part A 5-16

2 SYSTEM OVERVIEW 5

3 SYSTEM DIAGRAM 9

4 SYSTEM FEATURES 11

5 SYSTEM OPERATION 13

Part B 17-33

6 SYSTEM OVERVIEW 17

7 SYSTEM DIAGRAM 19

8 SYSTEM FEATURES 22

9 SYSTEM OPERATION 29

Common for Both A and B

10 GENERAL REQUIREMENT 33

11 TESTING AND INSPECTION 43

12 DESCRIPTION OF TESTS 45

13 TYPE APPROVAL 47

14 WARRANTY 47

15 MARKING AND PACKING 47

16 TECHNICAL LITERATURE 47

17 INFORMATION TO BE FURNISHED BY

PURCHASER

47

18 ISO CLAUSE 47


ABBREVIATIONS

1 dB Decibel

2 DC Direct Current

3 AC Alternating Current

4 DTMF Dual Tone Multi Frequency

5 Hz Hertz

6 kHz Kilo Hertz

7 MHz Mega Hertz

8 LED Light Emitting Diode

9 MOV Metal Oxide Varistor

10 PCB Printed Circuit Board

11 Rx Receive

12 Tx Transmit

13 S/N Ratio Signal to Noise Ratio

14 AF Audio Frequency

15 SWR Standing Wave Ratio

16 mW milli Watt

17 uW micro Watt

18 STN Station

19 SM Station Master

20 ASM Assistant Station Master

21 LC Level Crossing

22 VHF Very High Frequency

23 UHF Ultra High Frequency

24 EMI Electro-magnetic Interference

25 TEC Telecommunication Engineering Center

26 EUT Equipment under Test

27 SMF Sealed Maintenance Free

28 UL Underwriters Laboratories

29 CSA Canadian Standards Association

30 GSRP Gateman Specific Request Panel


1.0 INTRODUCTION: This specification covers the General Requirements, Functional Requirements, System

Requirements, Technical Requirements for “LEVEL CROSSING GATE CONTROL

AND MONITORING EQUIPMENT BASED ON WIRED & WIRELESS (VHF )

COMMUNICATION” for use over Indian Railway and is issued under specification No.

RDSO/SPN/TC/49/2020. Further requirements of Test & Inspection are also covered in

this specification.

1.1 This specification covers the technical provision only and does not include the provision

of a contract. In the absence of IRS specification, the procurement may be made as per

draft specification.

1.2 This specification requires references to the following standards specifications:

SN Specification No. Description

1. QM- 333 Specification for Environmental testing of Electronic

Equipments for Transmission and switching use

Wherever reference to any of the above specification appears in this document, it shall be

taken as a reference to the latest version of the specification unless the year of issue of the

specification is specifically stated.

1.3 The objective of this System is to provide reliable recorded Data & Voice

Communication between Station and Level Crossing Gates for exchange of Private

Number amongst Station Master and Gatemen for Closing/Opening of Gates.

1.4 This specification covers two types of equipments, having same objective but different

operation. One is covered as „Part – A‟ and other is covered as „Part – B‟. Purchaser can

procure any one type of them.

Part-A

2.0 SYSTEM OVERVIEW : The objective of the equipment is to establish reliable

Communication between ASM and LC gates, which will control closing / opening of the

gates before and after passing of the train with recording of data, voice logging, voice

messaging & exchange private number.

2.1 ASM & LC Gate equipment should perform as follows:-

2.1.1 The system shall be designed in such a way that ASM shall be able to control at least 8

gates each on either side of the Station / Cabin from his ASM equipment (in total 16

gates). However this can be increased or decreased depending upon the user‟s

requirement.

2.1.2 The message sent by ASM meant for a particular LC gate shall go to that gate only.


2.1.3 The message shall be initiated by pressing certain keys (push buttons) provided on the

equipment. On operation of keys by ASM from his equipment, electronically recorded

messages shall play in voice form in LC Gate Equipment and ASM should get its

acknowledgment automatically and vice-versa. It should be possible to send actual voice

message of ASM to LC gates .

2.1.4 The message shall be in Hindi, English or any regional language. Any two languages

depending upon the requirement of the Railway can be selected while placing order to the

RDSO approved manufacturer.

2.1.5 The System shall be compatible to work with all types of manned level crossing gates as

defined in para 4.20.

2.1.6 The System shall follow the method of exchanging private number between ASM and LC

gate man as per Railway board Safety circular No. 2000/Safety(A&R)/19/39 dated

08.05.2002 or latest.

2.1.7 ASM equipment shall have keys like CALL, CLOSE, OPEN etc., so that ASM shall be

able to give information to the Gate man by pressing appropriate keys. The keys should

be symbolized and made colorful to make equipment more user friendly. LCD panel

provided on the equipment shall indicate the keys, pressed by ASM, private number

inserted by ASM etc. SEND key must be there to send the information to the respective

gates. The ASM equipment will have LCD Panel and Gate Status Response Panel. The

LCD panel shall be of 16 Characters x 2 Lines and Gate Status Response Panel for the

information of configured gates and private no. sent by gates. Typical Gateman Specific

Request Panel (GSRP) Layout is mentioned in Figure 3.3.

2.1.8 LC gate equipment shall have similar types of keys like CLOSE, PROBLEM, OPEN etc.,

so that LC gate man shall be able to send his request or information to the ASM. LCD

panel provided on the equipment shall indicate the key pressed, private number inserted

by LC gate man etc. LCD panel shall be of 16 Characters x 2 Lines.

2.1.9 In case LC gate man is unable to execute the order of ASM for closing the gate, he will

immediately press the PROBLEM key with private number, which will intimate ASM

about his inability. In Addition to that gateman should be able to promptly communicate

with ASM with the help of Telephone provided with the equipment.

2.1.10 All the events like gate CLOSING, OPENING, PROBLEM, MESSAGES, VOICE

MESSAGE etc must be stored in the data-logger of ASM and LC gate Equipment with

Date, Time, Train Number, Gate Number and Exchanged Private Number of ASM and

gateman, which can be retrieved from both - ASM Equipment and LC Gate Equipment -

either on laptop or on a DOT matrix printer.

2.1.11 ASM Equipment and LC gate equipment should be protected suitably by assigning

password. Without correct password it shall not be possible to change the settings of

parameters of the equipment. Settings of parameters mean programming of Gate ID,

Controller (ASM) ID, Date, Time etc. Provision shall be made on the equipment itself for

setting the parameters with the help of assigned keys by authorized Railway person.

2.1.12 When station master/ASM or LC gate man wishes to have voice communication, the

same shall be possible by using Microphone or Telephone instrument provided on the

equipment.

2.1.13 Voice Communication should be recorded with Date & Time stamping on it. Voice

Storage Device shall be part of ASM Equipment as described in para 10.21.


2.1.14 The ASM equipment and LC Gate equipment shall be provided with mechanical

Locking arrangement to prevent unauthorized operation of the System. However System

Power shall remain in „ON‟ condition to receive incoming messages and information.

2.1.15 The system should have group messaging facility so that ASM on duty can send a

single private number (PN) to all the gates under his control. Individual gates however

will transmit individual private numbers.

2.1.16 The ASM equipment shall be provided with a microphone so that ASM on duty can

verbally advise to gatemen about the train information. The microphone shall Switch-on

for voice messaging with RED LED Indication only after entering its two digit private

number by ASM.

2.1.17 The ASM equipment should have provision to display PN of each closing gate on

Gateman Specific Request Panel (GSRP) of ASM Equipment, which will have seven

segments display.

2.1.18 It should also have a yellow LED to indicate pending Gateman requests of each

concerned gate, it should be possible to display the status of pending requests of gatemen

on GSRP (Gateman Specific Request Panel) for each gate separetely below seven

segment display till such time it is acknowledged by ASM.

2.1.19 A Reset button shall be provided on GSRP of ASM equipment to reset received PN.

2.1.20 Two separate software versions should be used to meet requirement of non-interlocked

and interlocked LC gates.

2.1.21 The Gate equipment keys should be symbolized & made colourful, to make equipment

more user friendly for less educated gatemen.

2.1.22 An External arrangement will have to be made for light so that the keyboard and LCD

Panel can be seen during night, where there is no provision of electricity at the GATE

LODGE / GOOMTI. The LED / Bulb of 12V DC/15- 35 mA current consumption along

with ON/OFF switch shall be provided for illumination and the same shall be connected

with the battery and shall be used only in the night at the time of use of LC Gate

equipment.

2.1.23 The cabinet of the equipment shall be powder coated with light colour like off-white,

Grey etc.

2.2 System should consist of following:

2.2.1 Communication Link between ASM and LC Gate equipment: The system

shall be capable of working both on wired (2-wire) and wireless (25 watts VHF

radio set). When system is working on a physical line, the Radio set shall be in

hot standby mode so that in case of any failure of Physical Line, the system

should automatically switch over to wireless communication with an indication on

LCD panel as well as glow of RED LED provided on the equipment. It should

automatically switch back to the physical line when it is restored.

2.2.2 ASM Equipment: The system must be designed using 16-bit or higher data bus

micro-controller of reputed make like Hitachi, Philips, Motorola etc and shall

consist of following items .

i. MIL Grade 810 F/G complaint, 25 W VHF radio set.

ii. Omni Directional Stacked Dipole antenna having SWR less than 1.5.

iii. RG 217 coaxial cable.

iv. Power Supply (12 V/ 15 amps) of reputed make like AXIOM etc.


v. Battery (12V, 130 AH) of reputed make like EXIDE, S/F, Hitachi, Amar

Raja etc

vi. Telephone Instrument

vii. Microphone of reputed make like Ahuja etc.

viii. 80 column DOT matrix/ Inkjet printer of reputed make like EPSON.

WIPRO, TVS, HP, Cannon etc. with suitable connector.

ix. Gateman Specific Request Panel shall display the pending request and

private no. sent by each gateman for all configured gates.

x. ASM Equipment should have locking facility of ASM Keypad when all

configured gates have sent their private nos.

2.2.3 LC Gate Equipment: The system shall be designed using 16-bit micro-controller

of Reputed make like Hitachi, Philips, Motorola etc and shall consists of following

items:

i. MIL Grade 810 F/G complaint, 25 W VHF radio.

ii. Omni Directional Stacked Dipole antenna SWR less than 1.5.

iii. RG 217 coaxial cable.

iv. Power Supply (12 V/ 15 amps) of reputed make like AXIOM etc

v. Battery (12V, 130 AH) of reputed make like EXIDE, S/F, Hitachi, Amara

Raja etc.

vi. Telephone Instrument.


3.0 SYSTEM DIAGRAM

Figure 3.1


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

Figure 3.2 Network of LC GATE Control And Monitoring Equipment

Figure 3.3 Layout for Gateman Specific Request Panel (GSRP)

4.0 SYSTEM FEATURES

2 – Wire Physical Line

UP

Gate

No 1

UP

Gate

No 8

ASM

Equipment DN

Gate

No 1

DN

Gate

No 8


4.1 The system shall be designed using micro-controller with a data and voice storage

and retrieval facilities.

4.2 ASM equipment shall have facility to instruct the gateman for Opening or closing

of the gate with scheme of exchanging private number as per Railway board

directives for different types of manned level crossing gates. Selected train

number, gate number, private number shall be visible on LCD panel of ASM unit

before SEND button is pressed by ASM. Gate Status Response Panel shall display

the status of configured gates and private no. sent by gatemen.

4.3 ASM equipment shall have locking facility of Keypad when all configured gates

has sent their private nos.

4.4 The system should have group messaging facility so that SM on duty can send a

single private number (PN) to all the gates under his control. Individual gates

however will transmit individual private numbers

4.5 At the selected LC gate the message in the local language for expected arrival

time of train, its number and direction with private number shall be communicated

and remain in repeat mode. Acknowledgment of commencement of playing of

message on LC gate equipment should be provided on ASM unit by automatic

glow of ACK LED.

4.6 Gate man shall inform the Opening of LC Gate to the ASM by pressing OPEN

Switch. Local voice message for requesting to open gate shall be repeated at ASM

unit.

4.7 ASM unit shall have capability to instruct the gate man to OPEN the gate. Voice

message of opening the gate should be played through speaker in the LC gate unit.

4.8 Similarly ASM unit shall have capability to instruct the gate man not to open the

gate. Voice message shall be played through speaker in the LC gate unit advising

not to open the gate.

4.9 Inability for closing the gate for any unforeseen reason can also be informed by

the gate man to the ASM by pressing PROBLEM button with private number.

Local voice message of LC gate problem with private number shall be played

through speaker in the ASM unit. In addition to that, Gateman shall immediately

talk to ASM / SM on duty by using Telephone provided on the equipment.

Whenever voice communication takes place, it will be recorded in Voice Storage

Device of ASM Equipment with Date and Time stamping on it.

4.10 Priority of Emergency Call over On-going Call:Whenever ASM is having

communication with any of the Gatemen, then another Gateman shall not be able

to listen the ongoing conversation. However if any other gate man shall have an

urgent message to be conveyed to the ASM, then he shall be able to send the

message to the ASM by pressing PROBLEM Button with private No. The same

shall be displayed on the LCD of ASM Unit with RED LED indication. The

emergency message also be played / reproduced on the ASM unit. In that case

ASM shall promptly attend the emergency call by terminating the On-Going

Voice Communication

4.11 Announcement of voice message shall continue in the ASM unit, unless and until

„ACK‟ button of ASM unit is pressed by ASM/SM on duty.

4.12 Announcement of voice message shall continue in the LC gate unit, unless and

until „ACK‟ button of LC gate unit is pressed by Gateman on duty.


4.13 Voice communication shall be possible through telephone between ASM and

gateman. Voice communication shall be duplex when system is working on 2-

wire Physical Line. Similarly voice communication shall be semi duplex/ simplex

when system is working through wireless on VHF radio set. All Voice

Communication shall be recorded in Voice Storage Device of ASM Equipment.

(Optional): The system software can be modified to have communication

between one gateman to another gateman depending upon the requirement with

the intervention of ASM/SM on duty. However ASM / SM on duty will have

overriding facility to send messages to the gates even if he is engaged with

Telephone communication.

4.14 The ASM Equipment and LC Gate equipment shall be provided with mechanical

locking arrangement to prevent unauthorized operation of the System. However

System Power will remain in „ON‟ condition to receive incoming messages and

information. In that case it is not possible to operate the equipment, even receipt

of on-going voice messages cannot be stopped.

4.15 On either side, there may be a number of level crossing gates which are required

to be CLOSED / OPENED, there shall be a facility of “Group Messaging” to all

the gates to facilitate quick transfer of same information to all the gates on either

side depending on the requirement (Upside or Downside). However information

received from the LC Gate shall be in serial mode and same shall be recorded

with time and date.

4.16 some limited solution shall be made for train details where train number is of

alpha-numeric like goods train, Saloon, Railway engine, Trolley etc. The same

shall be informed by the manufacturer to the Railway user.

4.17 Normally voice as well as data communication between ASM unit and LC gate

unit will be through 2-wire physical media. In case of LINE failure, alternate

wireless medium shall work. There shall be dynamic switching to select first

available working medium.

4.18 „LINE‟ or „RADIO‟ indications shall appear on ASM unit as well as LC gate

unit. So that maintenance staff is made available without delay in case of LINE

failure.

4.19 System must have a provision to operate from any of the two available sources of

power supply i.e. Electricity and battery. However Solar Panel must be another

source to charge the battery and this shall not be part of the equipment.

4.20 System shall have facility to exchange Private Number for different type of gates

as described in Railway board safety circular no 2000/safety(A&R)/19/39 whose

description is as given below.

4.20.1 Traffic level crossing gate, interlocked with stop signals of station, provided

with telephone, with normal position ‘ Open to road traffic’

Gate closing instruction with/without (to be configured while setting of the

equipment) private number, from ASM to Gateman.

Gateman gives private number to ASM as acknowledgement (if configured

normal, not configured for interlocked ).

4.20.2 Traffic level crossing gate, Non - interlocked with stop signals, provided with

telephone, with normal position ‘Closed to road traffic’.

Gate open request, from gateman to ASM.


Gate open instruction with private number, from ASM to gateman.

Gate close information with private number, from gate-man to ASM.

Confirmation of Gate closure from ASM as acknowledgement to gate man

with private number.

4.20.3 Engineering Level crossing gate, Non-interlocked, provided with telephone,

with normal position ‘Open to road Traffic’

Train arrival information from ASM to gateman with Private number.

Gateman acknowledges ASM with private number.

Gate closing instruction from ASM to gateman with private number.

Gateman acknowledges ASM with private number.

Gate open instruction from ASM to gateman with private number.

4.20.4 Engineering level crossing gate, Non interlocked, provided with telephone,

with normal position ‘Closed to road Traffic’

Gate open permission from gateman to ASM.

Gate open instruction from ASM to gateman with private number.

Gate close information with private number, from gateman to ASM.

Confirmation of gate closure from ASM as acknowledgement to gateman

with private number.

4.20.5 Engineering level crossing gate, interlocked with gate signals, provided with

telephone, with normal position ‘Open to road traffic’

Gate closing instruction with/without (to be configured while setting of the

equipment) private number, from ASM to Gateman.

Gateman gives private number to ASM as acknowledgement (if

configured normal, not configured for interlocked gates).

5.0 SYSTEM OPERATION: The system shall have capability to search automatically the

available medium of communication that is 2 - wire and wireless. Preference of

working shall be given to 2-wire. Incase 2 - wire is defective or not available, system

will automatically select wireless as medium of communication. The system shall be

capable to work either on 2-wire physical line or Wireless or on both mediums.

5.1 ASM Equipment [Through Keyboard]

5.1.1 On Pressing "CLOSE" button, the word "CLOSE” will be displayed on the LCD

panel. Thereafter the Gate Number (GATE :--), Private number (PVTN:--), Direction of

arrival train(UPDN:--) and Train number (TRN:---) can be inserted by keyboard and

sent the information to the respective gate by pressing SEND button.

5.1.2 On Pressing "OPEN" button, the word “OPEN” will be displayed on the LCD panel.

Thereafter the Gate number (GATE:--), Private number(PVTN:--) can be inserted by

keyboard and sent the information to the respective gate by pressing SEND button.

5.1.3 Whenever ASM equipment sends the information by pressing SEND button, ‘ACK’

LED will glow. After confirm reception of the message at appropriate gate, ‘ACK’

LED will go-off.

5.1.4 After closing the gate, gate man shall press CLOSE button and enter the private No and

press the SEND Button to transfer the information from LC Gate Equipment to ASM

Equipment The received message will be displayed on LCD panel and once the ASM

unit receives Gate CLOSE confirmations of all gates, the seven segment displays and

LEDs on the GSRP must start flashing and the ASM units keypad must get locked so


that ASM unit must not send any command, as well as playing of Voice message on

speaker. In addition to that „CLOSE‟ LED will glow on ASM Equipment.

5.1.5 In case of any problem with the LC Gate or any untoward incident, the Gateman shall

send the information to the ASM by pressing PROBLEM button from his equipment

with Private Number. ASM equipment will get visual indication on LCD Panel, Voice

message on speaker with a Glow of „PROBLEM‟ Red LED.

5.1.6 On receipt of „Gate Opening‟ request from Gateman, on ASM equipment there will be

Voice message as well as Glow of „OPEN‟ LED.

5.1.7 Incase of 2-w physical line fault, the message will automatically transmitted through

Wireless with an indication ‘RADIO MODE’ glow of LED as well as Display on LCD

Panel.

5.1.8 ‘PTT’ LED shall glow incase of Voice Communication through Telephone on Wireless

between ASM and LC Gate man. The PTT( Press to Talk ) switch and LED shall be

energized with VOX ( Voice Operated Switch )

5.1.9 This equipment shall have built-in Voice Logging facility as described in para 10.21.

5.2 ASM Equipment [Through Microphone] 5.2.1 Press CALL Key. The cursor will point at GATE entry on LCD screen

5.2.2 Equipment is ready to send voice message to all UP Gates or all DOWN

gates Press Left Arrow Key for sending voice message to all UP gates

Press Right Arrow Key for sending voice message to all DOWN gates.

5.2.3 Now cursor moves to PVTN entry on LCD screen.

5.2.4 Here enter two digit numeric private number of this Voice Message and

press SEND Key

5.2.5 Once acknowledgement is received from any of the gates, Red LED of

MICROPHONE will turn on and Microphone is open to record your

message for a maximum of 30 seconds duration.

5.2.6 Start speaking required message, till 30 seconds. If message is finished

before 30 seconds, then press CALL Key again to disconnect. The

MICROPHONE LED will turn off and LCD screen will show as follows:

5.2.7 Now Private Numbers will be received for close confirmation from LC

Gate Equipments to whom Voice Message was sent. The Private Numbers

from LC Gate Equipments will be visible on GSRP, attached to ASM

Equipment.

Caution:Voice Instructions to Gatemen by ASM will be effective only if Red

LED provided with Microphone is ON.

GATE CALL

PVTN:

Disconnecting in progress…..

Note: Press CALL Key again and repeat Step 1 to Step 5 to send another voice

message to all UP Gates or all DOWN gates.

Equipment LCD screen will show as follows:


5.3 LC Gate Equipment [Through Keyboard]

5.3.1 On pressing ‘CLOSE’ button the word „GATE CLOSE‟ will appear in the

LCD panel Thereafter by inserting Private No, the message can be sent to

ASM Equipment by pressing ‘SEND’ button.

5.3.2 On Pressing ‘PROB’ button the word „GATE PROBLEM‟ will appear in the

LCD panel Thereafter by inserting Private No, the message can be sent to

ASM Equipment by pressing ‘SEND’ button.

5.3.3 On pressing ‘OPEN’ button the word „GATE OPEN‟ shall appear in the LCD

panel and message can be sent to the ASM equipment by pressing ‘SEND’

button.

5.3.4 When the LC Gate equipment receives any message from ASM equipment,

voice message will play in the LC gate equipment. On pressing ‘ACK’ button

the voice message can be muted.

5.3.5 Whenever LC gate equipment sends the information by pressing SEND

button, ‘ACK’ LED will glow. After confirm reception of the message at

ASM Equipment, ‘ACK’ LED will glow OFF.

5.3.6 On receipt of „Gate Open Message‟ from ASM equipment, there will be voice

message on the speaker with an indication of ‘OPEN’ LED.

5.3.7 On receipt of „Gate Close Message‟ from ASM equipment, there will be

playing of voice message on a speaker with a glow off „CLOSE‟ LED.

5.3.8 Incase 2-wire physical line fault, the message will be automatically

transmitted through wireless with an indication of „RADIO MODE’ LED

glow as well as display on LCD panel.

5.3.9 ‘PTT’ LED shall glow in case of voice communication through telephone on

wireless between LC gate man and ASM. The PTT ( Press to Talk) LED and

switch shall be energized with VOX (Voice Operated Switch).

5.4 LC Gate Equipment [Through Microphone] 5.4.1 On receiving, Voice Message from Station, following Menu appears on your equipment

LCD screen

Voice Message from Station will be heard live on LC Gate Equipment Speaker

Caution: Equipment Keypad is locked at this time

GATE CALL

PVTN:

PVTN -11

LIVE RECORDING PVTN – 11 is Station Master’s Private Number


5.4.2 After receipt of disconnect signal from ASM equipment or a timeout of 30 seconds the

recorded announcement starts repeating, following Menu appears on LC Gate

Equipment LCD screen

Now same message from station will keep playing on LC Gate Equipment

Speaker.

Caution: Equipment Keypad is now unlocked to enable to press Ack

Key

5.4.3 Press Ack Key to mute Voice Message from Station

On Pressing Ack Key, Voice Message from Station stops playing and Pvt. No.

announcement starts and following Menu appears on LC Gate Equipment LCD

screen

On pressing ACK key again, Home screen will appear and Playing of Station

Master Private Number is stopped.

PVTN -11

PLAYING RECORD PVTN – 11 is Station Master’s Private Number

PVTN – 11 is Station Master’s Private Number

PVTN -11

PLAYING PVTN


Part-B 6 SYSTEM OVERVIEW

6.1 The objective of this System is to provide reliable recorded Data & Voice Communication

between Station and Level Crossing Gates for exchange of Private Number amongst Station

Master and Gatemen for Closing/Opening of Gates.

6.2 This specification covers following two configuration of Station Equipment depending

upon purchasers requirement :

(i) Standard configuration of Station Equipment shall be able to control 4 (four) Gates

on either side of the Station from his Station Equipment.

(ii) Optional configuration of Station Equipment shall be able to control 6 (six) Gates

on either side of the Station from his Station Equipment.

6.3 A General Schematic for system in which station master is able to control 4 (four) Gates on

either side of the Station from his Station Equipment is given in Figure-7.1 and this type of

equipment is henceforth known as “Standard Configuration” i.e “Level Crossing Gate

Control & Monitoring System for 4 (four) Gates on either side of the Station”. In this

specification schematic diagram and other requirement of specification of “Standard

System” has been elaborated. An overall Network Diagram of the Standard System is given

in Figure-7.2.

6.4 The “Level Crossing Gate Control & Monitoring System for 6 (six) Gates on either side

of the Station equipment” should have all the relevant requirements mentioned in this

specification.

6.5 The system should be designed in such a way that it should be able to control & monitor

gate operation messages for different type of Manned Level crossing gates. The Manned

Level Crossing Gates (LC Gates) over Indian Railways are classified in following broad

categories.

A) Non-Interlocked

I. Engineering LC Gate, Non-Interlocked, Normally Open to Road Traffic

II. Engineering LC Gate, Non-Interlocked, Normally Closed to Road Traffic

III. Traffic LC Gate, Non-Interlocked, Normally Close to Road Traffic

B) Interlocked

I. Engineering LC Gate, Interlocked, Normally Open to Road Traffic

II. Traffic LC Gate, Interlocked, Normally Open to Road Traffic

6.6 The Station Equipment of the system shall be configurable to accommodate any combination

of Category of LC Gates on either side of Station as defined in Clause 6.5.

6.7 It shall be possible to configure LC Gate Equipment to meet various requirements for

working interlocked & non-interlocked LC Gates based on site requirement. For interlocked

gates the open, close buttons and seven segments display may be made disabled at the time


installation, as there is no requirements of private number exchange between Station Master

& Gate as per Station/ Gate Working Rule of station/Gate.

6.8 Station Equipment and LC Gate Equipment shall be suitable for working in Single Line,

Double Line and Multiple Lines.

6.9 The System shall follow the method of exchanging Private Number between Station Master and

Gateman as stipulated in para 9.

6.10 All the messages like Gate Closing, Gate Opening and intimation etc. must be stored in

the Data Logger of Station Equipment and LC Gate Equipment with Date, Time, Train

No. Gate Number, Exchanged Private Number of Station Master and Gateman. It should

be possible to retrieve this Data by connecting Laptop to a Port provided on the

equipment. Further it should be possible to check previously stored data on „Display‟ of

the equipments using SCROLL UP & SCROLL DOWN Keys.

6.10.1 The Solid-state Disk Drive (SDD) storage device should be provided for logging data/

voice. In addition to SDD, data/ voice logging should be recorded simultaneously in

FLASH memory, which should be removable for taking to control office for any post

incident investigation.

6.10.2 There shall be provision of Ethernet port based on TCP/IP protocol for connection of

Station Equipment/Gate Equipment to an intranet.

6.11 When Station Master or Gateman wishes to have voice communication, the same shall be

possible by using Telephone Instrument provided with the equipments.

6.12 System display shall indicate „G‟ followed by numeric number of Goods / Service trains,

which should be fed by Station Master by pressing „G‟ button followed by numeric

number with the help of Key board of SM Equipment.


7 SYSTEM DIAGRAM

Figure-7.1 : System Schematic Diagram


Figure-7.2 : System Network Diagram


7.1 Panel Layout of of „LC Gate Equipment‟ is attached as Figure 7.3. Panel Layout of

„Station Equipment‟ suitable for Four /Six level crossing gates on either side of the

station is attached as Figure 7.4 & 7.5.

Figure7.3 :Panel Diagram for LC Gate Equipment

Figure 7.4:Panel Diagram for Station Equipment controlling 4 Gates


Figure 7.5: Panel Diagram for Station Equipment controlling 6 Gates

8 SYSTEM FEATURE

8.1 „Station Equipment‟ and „LC Gate Equipment‟ shall be provided with mechanical Key-

Locking arrangement to prevent unauthorized operation of the system. „Station

Equipment‟ and „L.C Gate Equipment‟ shall operate only when Keyed in. When Key is

taken out, these equipments shall hold in their last operated position. However during

Key-Out position, System Power shall remain in ON condition and these equipments shall

continue to receive messages and also continue to play Audio Messages. In „Telephone

Mode‟ even if Key is taken out, Telephone will continue to work.

8.2 The private number shall required to be fed by Station Master and Gateman using „Station

Equipment‟ and „LC Gate Equipment‟. Working of different category of LC Gate using

this System is explained below. Bold sentences indicate action to be taken by „Station

Master or Gateman‟.

8.3 The Message sent by Station Master from Station Equipment for a particular LC Gate

shall go to that LC Gate Equipment only. Similarly the Message from LC Gate

Equipment shall go to concerned Station Equipment only. As such Station Equipment are

provided with „Station Id‟ and LC Gate Equipments are provided with „Gate Id‟. These

„Station Id‟ and „Gate Id‟ are only for internal working of equipments and Station Master

& Gateman are not required to be concerned for these Ids.


8.4 The Audio Message shall be in Hindi, English or any Regional Language. Selection of

any two languages depending upon the requirement of the Zonal Railway shall be

possible and it should be configured during installation of the equipment.

8.5 As the display at LC Gate Equipment & Station Equipment will show only numbers and

symbols, the display will be in English Only.

8.6 Configuration of „Station Equipment‟ and „LC Gate Equipment‟ shall be carried

preferably using Dip Switches/Jumper Setting. Configurable features include „Station Id‟.

„Gate Id‟, „Gate Category‟, „Language‟ etc.

8.7 Programming of „Station Equipment‟ and „LC Gate Equipment‟ should be protected

suitably using User Id and Password. Without correct User Id and Password it shall not

be possible to change the setting of parameters of the equipment like „Gate Number‟,

„Station Name‟, Date, Time etc.

8.8 Data Logging in „Station Equipment‟ and „LC Gate Equipment‟ will record all the

messages related to operation automatically duly Date & Time Stamped. These recorded

events shall also be retrieved using Laptop.

8.9 During Failure of „Station Equipment‟ and/or „LC Gate Equipment‟ it shall be possible

for Station Master and Gateman to Switch-Over to „Telephone Mode‟ by manually

operating „Standby/Main Switch‟. In this mode Electronic Circuitry of equipments will

be completely bypassed and Telephone Instruments will be directly connected to 2-Wire

Omnibus Line. During this „Telephone Mode‟, following facilities using Inbuilt

Electronic Circuitry of Telephone Instruments shall be available:

8.9.1 In Telephone Mode, Telephones shall work in Master-Slave configuration. Station

Telephone will work as „Master‟ and LC Gate Telephones will work as „Slave‟.

8.9.2 Station Telephone will have the facility to call any of the LC Gate individually by

pressing corresponding „Gate Switch‟ designated for a particular gate or to call all LC

Gates collectively by „ALL Call Switch Button‟. When Master presses “ALL CALL

Switch/Button, all the Gate Telephones are activated and can converse to the Master

as well as among themselves.

8.9.3 In addition to these switches, Station Telephone shall have another „Disconnect

Switch/Button‟ for disconnecting All Gate Telephones. All the Gate Telephones will

be disconnected and Indicating LED on Station Telephone meant for all the Gate

Telephones will go OFF, when Disconnect switch of Master Telephone is pressed.

8.9.4 Gate Telephone will have the facility to send an indication to Station Telephone that

it wants to talk to the Station Master. The Gate Telephone will have only one

switch/button by pressing which it will draw the attention of the Station Master.

8.9.5 Unless permitted and activated by the Station Master, “Gate to Station” or “Gate to

Gate” or “Station to Gate” conversation shall not be possible. Only when Station

Master presses „Gate Switch‟ designated for a particular gate, that Gate Telephone

will be activated for conversation.

8.9.6 When SM is having communication with any Gateman, then another Gateman shall

not be able to listen the ongoing conversation.


8.9.7 Only when Station Master presses two or more Gate Switches/Button, those Gates are

activated and will be able to converse to the Master as well as between them. The

activated Gate Telephone will remain activated for conversation even if the handset

of the master telephone is placed on the hook so that conversation between the Gate

Telephones can continue.

8.9.8 Voice recording at „Station Equipment‟ shall be provided, which will record all the

Voice Communication taking place between Station Master and Gateman in both

modes (Main/standby). These Voice Recordings can be retrieved by transferring it to

a Laptop. If Voice Recording is not taking place, it should be reported by „Alarm‟.

8.9.9 In case Gateman is unable to execute the order of Station Master for closing the gate,

he will immediately talk to Station Master over Telephone. As such Gate man should

be able to promptly communicate with Station Master with the help of Telephone

Instrument provided with the equipment. As such even without switching over to

Telephone Mode, Telephonic Feature as given in para 8.9 shall be available using

Electronic Circuitry of Station Equipment and/or LC Gate Equipment. During this

Voice Conversation details like call direction, called/calling gate will be recorded.

8.9.10 Voice Communication shall be Duplex when system is working on Physical Line.

Similarly Voice Communication shall be Semi-Duplex/Simplex when system is

working through Wireless on VHF Radio Sets.

8.9.11 GENERAL REQUIREMENTS OF TELEPHONE INSTRUMENTS:

1. The Telephone Instrument provided with Station Equipment will be called Station

Telephone and Telephone Instrument provided with Gate Equipment will be called Gate

Telephone.

2. Station Telephone and Gate Telephone shall work in Master-Slave Mode, with Station

Telephone as Master and Gate Telephone as Slave.

3. Station Telephone shall have the facility to call individually any of the LC Gates by

pressing the corresponding Push Button switch designated for a particular LC Gate

Telephone. LC Gates which are not called by Station Master should neither be able to

listen nor talk.

Station Telephone shall also have the facility to call collectively all the gates by „ALL

CALL‟ Push Button. On pressing this button, a general ring will go to all the Gate

Telephones simultaneously. For imparting certain common instruction simultaneously or

for conference purposes this ALL CALL general ring will be used.

In addition to these Push Buttons, Station Telephone shall have another Push Button

„DISCONNECT‟ for disconnecting the Gate Telephone(s). When this switch is pressed,

all the Gate Telephone(s) connected in the circuit will be deactivated and speech will not

be through to and from those Gate Telephone(s).

4. Gate Telephone will have the facility to send an indication to the Station Telephone that

it wants to talk to the Station Master. The Gate Telephone will have only one Push

Button by pressing which it will draw the attention of the Station Master.

5. DTMF Codes for above activities are given below. These Two-Digit DTMF Codes shall

be generated by pressing Single Push Button or by an action of Handset. Duration of

Code will be as per 200+50 ms(Presence Time), 100+50 ms(Absence Time). (a) DTMF Codes generated by Master Telephone when it presses Gate Telephone Buttons.


Master presses Gate Telephone Up 1 11

12

Master presses Gate Telephone Dn 1 12











(b) DTMF Codes generated by Gate Telephones when they call Master Telephone.

Gate Telephone Up 1 Calls Master Tel 31

Gate Telephone Dn 1 Calls Master Tel 32











(c) DTMF Codes generated by Gate Telephones when Gate Telephone Handset is put down

Gate Telephone Up 1 puts down its Handset 51

Gate Telephone Dn 1 puts down its Handset 52











(d) When Master Telephone Press ALL CALL Switch, DTMF Code Generated is 88.

(e) When Master Telephone Press DISCONNECT Switch, DTMF Code Generated is 99.


6. The Station Telephone and Gate Telephone shall permit working of Voice

Communication and Signaling on 2-Wire Omnibus Circuit.

7. It shall be possible to send the signaling code even when two or more parties are in

conversation.

8. AUDIO-VISUAL INDICATIONS:

i) Master Telephone : Power ON LED Power ON LED is of Green colour and will glow when handset of the telephone

is lifted. This LED is to be fixed on the right hand side of the telephone.

Calling Indications: Eight/Twelve Red colored LEDs will be provided near the Eight/Twelve Calling

push switches. Gate telephone numbers shall be suitably printed to designate the

push switch and the LED. When a Gateman calls Station Master by pressing the

CALL ASM switch, the corresponding LED in Master Telephone will blink, as

well as a piezo buzzer will sound. This blinking LED will glow steadily when

master presses the corresponding push switch.

This LED will also glow steadily when Master calls some gate by pressing the

corresponding switch.

These LEDs will go OFF when “Disconnect” switch is pressed.

A piezo buzzer will also sound when it is being called by the gate telephone and

it should generate an interrupted / musical sound.

ii) Gate Telephone : Power ON LED This is of Green color and will glow when handset of the telephone is lifted. This

is to be fixed on the right hand side of the telephone.

Calling Indications: A Red colour LED will be in the left side of the telephone. This LED will glow

when Master calls the Gate. This LED will go OFF when the handset of the

telephone is lifted. The LED will glow and Piezo Buzzer will also sound both in

ON hook and OFF hook condition.

Ring back Tone : Ring Back Tone (RBT) will be sent back to the Master Telephone when a Gate

Telephone Rings. The level of RBT at the Gate Telephone output point will be

more than –12 dBm.

8.9.12 TECHNICAL REQUIREMENTS OF TELEPHONE INSTRUMENTS:

1. The telephone shall be protected from Surge and Transients by using “GDT”, “PTC”

“MOVR” and Inductor based surge protection system.

2. The receiver of the telephone instrument shall be protected from acoustic shocks by

providing two rectifiers in parallel and with opposite polarity across the receiver.

3. Workmanship should conform to good engineering practice so as to ensure that the

instrument is free form defects, rust, cracks and other defects that could impair the

operation or serviceability while in use or under storage. The treatment and finishes shall

be such that under operating conditions, no deterioration occurs to any of the parts.

4. All the components, switches, connectors etc., shall be of High Quality/Industrial Grade

and should be procured from renowned manufacturer. The components should be freely

available in the market. All the numbers of components should be clearly indicated. The

LED indicators wherever used shall be of superior quality wide angle with metallic

holders. The component type numbers shall not be defaced.

5. The layout of components and wiring shall be such that all parts are easily accessible for

inspection, repair and replacement.


6. The Master and Gate Telephones should work properly from individual DC Power source

of 12 V DC + 20%.

7. Unless permitted and activated by the Master, “Gate to Master” or “Gate to Gate” or

“Master to Gate” conversation is not possible. Only when Master presses a particular key

designated for a particular Gate, that Gate Telephone will be activated for conversation.

8. Only when Master presses two or more Gate switches, those Gates are activated and will

be able to converse to the Master as well as between them. The activated Gate Telephone

will remain activated for conversation even if the handset of the master telephone is

placed on the hook so that conversation between the Gate Telephones can continue. The

Gate Telephone will be disconnected and Indicating LED on Master telephone meant for

that particular Gate Telephone will go OFF, when the handset of that particular Gate

Telephone is placed on the hook.

9. In Telephone Mode, all the 9/13 Telephones connected as per Figure-1 should work from

this Single Power Source and no separate Power supply will be provided at the Gates.

10. When in Telephone Mode, and available voltage at a Gate Telephone is less than 9.6 Volt

at the time of All Call Ringing(due to Longer Distance or due to High Conductor Loop

Resistance or due to Location of other Telephones), this Gate Telephones should work

satisfactorily with individual Power Supply arrangement of 12 V DC+20%.

11. Current consumption by the telephones at 12 V DC shall not be more than the limits

mentioned below:

For Master Telephone :

15 mA in idle condition.

200 mA during ring with all 12 LEDs glowing.

40 mA during speech condition

For Slave Telephone:

15 mA in idle condition.

35 mA during ring

25 mA during speech condition.

8.9.13 CONSTRUCTION AND MATERIALS

1. The body of the telephone instrument shall be made of ABS (Acrylonitrile Butadiene

Styrene) Plastic material.

2. The Handset when resting on the cradle of completely assembled telephone shall push the

plunger(s) down to the limits of travel. The plunger(s) shall be free and shall not stick.

The plunger(s) lifting spring shall be tensioned to give a positive action. Handset of the

Telephone when ON Hook or OFF Hook shall operate the Cradle Switch Mechanism,

which shall be checked electrically.

3. Piezo Electric Buzzer operating at suitable voltage generated internally by the circuitry

shall be provided. Buzzer of proper size shall be fixed inside the telephone body firmly.

Suitable holes or grills should be available in the body of the telephone instrument for

audibility of sound from piezo electric buzzer.

4. Standard DTMF Tone Generator shall be provided to produce DTMF tones. It shall be

possible to assign any code to a Gate telephone (Slave telephones) using „DIP‟ switches.


5. Standard DTMF decoder shall be provided. On receipt of the valid code/tone, it shall be

decoded and Piezo electric buzzer & LED shall be activated when the handset of the

telephone is ON or OFF the cradle.

6. The wiring shall normally be by means of coloured PVC insulated multi strand flexible

wire of good quality and of suitable size.

7. Glass Epoxy PCB of minimum 1.6mm thickness shall only be used. The PCB shall be

coated with epoxy based anti fungal varnish to provide protection against dust, humidity,

fungal infection and mechanical abuses.

8. The wiring to the components shall be provided with sufficient slack to permit the

components to be swung clear of the assembly without any disconnection.

9. Transformer: Ferrite Material shall be used for core so as to obtain required Electrical

Properties. Manufacturer shall provide documentary evidence for use of Ferrite Material.

The complete winding shall be protected by proper insulation to avoid ingress of

moisture.

8.9.14 ELECTRICAL CHARACTERISTICS:

1. Electrical Circuit of the Telephone Instrument shall provide good matching between Line

and the Instrument with minimum Sidetone.

2. The output of the Code Generator shall be adjustable from 0 dBm to –7dBm when

measured across 600 Ohm resistance connected across Line Terminals L1 and L2.

3. It shall be possible to work the Signaling System with a minimum input level of -25

dBm at the Line Terminals with the Line S/N ratio of 15. The Telephone shall work

satisfactorily for input level of -25dBm to –2dBm.

4. One Station Telephone and Eight Gate Telephones are connected together through an

artificial line with distributed loop resistance as shown in Figure below and it should be

possible to call and get ring on all the Gate Telephones. Speech quality should be good.


9 SYSTEM OPERATION:

The working of different categories of LC gate is as follows:

(A) Engineering LC Gate, Non-Interlocked, Normally Open to Road Traffic Closing the Gate for Road Traffic (1) To advise Gateman about approaching Train, Station Master shall feed Train Information [ ‘Train No.’,

‘Expected Time of Passage’ & ‘Outgoing Private Number’]. Subsequently SM shall press ‘Advise

Button’ of concerned LC Gate. This will transmit „Direction of Train‟, „Train No.‟, „Expected Time of

Passage‟ and „Private Number‟ to LC Gate. „Advise Display‟ for concerned LC Gate on SM Equipment

will also start flashing „- -‟. This will also clear the „Outgoing Private Number Display‟ of Station

Equipment.


For a Group Message to more than one, Engineering, Non-Interlocked, Normally Open to Road Traffic LC

Gate, Station Master shall press ‘Advise Buttons’ of all the concerned LC Gate simultaneously after

feeding the train information .

For a Group Message to all the gates simultaneously, Station Master shall press ‘All Gates’ after feeding

the train information.

(2) On receipt of above messages at LC Gate, „Train No.‟ & „Expected Time of Passage‟ will be shown in

Main Display and „Incoming Private Number‟ will be shown flashing on „ACK Display‟. Audio Message

will also start playing at LC Gate Equipment. On Pressing ‘MUTE Button’ by Gateman for 1 Seconds,

audio will stop playing. The Gateman shall feed ‘Outgoing Private Number’. Subsequently Gateman

shall press ‘ACK Button’. This will transmit the Private Number to Station and „Advise Display‟ will

also become steady. This will also clear the „Outgoing Private Number Display‟ of LC Gate Equipment.

(3) On receipt of this Private Number from LC Gate, it will be shown on „Advise Display‟ of concerned LC

Gate on Station Equipment.

(4) After Closing the Gate, Gateman shall feed ‘Outgoing Private Number’. Subsequently Gateman shall

press ‘ ‘Close Button’. This will transmit „Private Number‟ to Station Master and „Close Display‟ on LC

Gate Equipment will also start flashing „- -‟. This will also clear the „Outgoing Private Number Display‟ of

LC Gate Equipment.

(5) On receipt of this message at Station Equipment, „Incoming Private Number‟ will be shown flashing on

„Close Display‟ of concerned LC Gate and Audio Message will also start playing. On pressing MUTE

Button by Station Master for 1 Seconds, audio will stop playing. Station Master shall feed Private

Number. Subsequently Station Master shall press ‘Close Button’ of concerned LC Gate. This will

transmit „Private Number‟ to concerned LC Gate and „Close Display‟ for concerned LC Gate will become

steady. This will also clear the „Outgoing Private Number Display‟ of Station Equipment.

(6) On receipt of this Private Number from Station, it will be shown on „Close Display‟ of LC Gate

Equipment.

Opening the Gate for Road Traffic

On some railways, if for opening of LC Gate if permission of Station Master under

exchange of Private Number is required, then following procedure(Steps 7, 8 & 9) will be

followed.

(7) For opening the LC Gate, Gateman shall feed ‘Private Number’. Subsequently, Gateman shall press

‘Open Button’. This will transmit „Private Number‟ to Station and „Open Display‟ will start flashing „- -‟

at LC Gate Equipment. This will also clear „Outgoing Private Number Display‟ from LC Gate Equipment.

(8) On receipt of this „Private Number‟ it will be shown flashing on „Open Display‟ of concerned LC Gate on

Station Equipment, and Audio Message will also start playing at Station Equipment. On pressing MUTE

Button for 1 Seconds, audio will stop playing. If SM wish to permit Gateman to Open LC Gate to Road

Traffic, he shall feed Private Number. Subsequently Station Master shall press ‘Open Button’ of

concerned LC Gate. This will transmit „Private Number‟ to LC Gate. „Open Display‟ for concerned LC

Gate will also become Steady. This will also clear the „Outgoing Private Number Display‟ of LC Gate

Equipment.


(9) On receipt of above message from Station, Private Number will be shown in „Open Display‟. This will

authorize the Gateman to open the LC Gate for Road Traffic.

(10) On Pressing ‘Clear Button’ by Station Master for 1 Seconds, Main Display, „Advise Display‟, „Close

Display‟ & „Open Display‟ will be cleared.

(11) On Pressing ‘Clear Button’ by Gateman for 1 Seconds, Main Display „Advise Display‟, „Close

Display‟ & „Open Display‟ will be cleared.

(B) Engineering LC Gate, Non-Interlocked, Normally Closed to Road

Traffic

Opening the Gate for Road Traffic

(1) For opening the LC Gate, Gateman shall feed ‘Private Number’. Subsequently, Gateman shall press

‘Open Button’. This will transmit Private Number to Station and „Open Display‟ will start flashing „- -‟ at

LC Gate Equipment. This will also clear Outgoing Private Number from „LC Gate Equipment‟.


Station Equipment and Audio Message will also start playing at Station Equipment. On pressing MUTE



concerned LC Gate. This will transmit Private Number to LC Gate. „Open Display‟ for concerned LC

Gate will also become Steady. This will also clear the „Outgoing Private Number Display‟ of Station

Equipment.

(3) On receipt of above message from Station, „Private Number‟ will be shown in „Open Display‟. This will


Closing the Gate for Road Traffic (4) After Closing the Gate, Gateman shall feed ‘Outgoing Private Number’. Subsequently Gateman shall

press ‘ ‘Close Button’. This will transmit „Private Number‟ to Station Master and „Close Display‟ on LC

Gate Equipment will also start flashing „- -‟. This will also clear the „Outgoing Private Number Display‟ of

Station Equipment.

(5) On receipt of this message at Station, Incoming Private Number will be shown flashing on „Close Display

of concerned LC Gate and Audio Message will also start playing. On pressing MUTE Button by Station

Master for 1 Seconds, audio will stop playing. Station Master shall feed Private Number.

Subsequently Station Master shall press ‘Close Button’ of concerned LC Gate. This will transmit

Private Number to concerned LC Gate and „Close Display‟ for concerned LC Gate will become steady.

This will also clear the „Outgoing Private Number Display‟ of Station Equipment.

(6) On receipt of this „Private Number‟ will be shown on „Close Display‟ of LC Gate Equipment.

(7) On Pressing ‘Clear Button’ by Station Master for 1 Seconds, „Close Display‟ & „Open Display‟ will be

cleared.


(8) On Pressing ‘Clear Button’ by Gateman for 1 Seconds, „Close Display‟ & „Open Display‟ will be

cleared.

(C) Traffic LC Gate, Non-Interlocked, Normally Closed to Road Traffic Opening the Gate for Road Traffic

(1) For opening the LC Gate, Gateman shall feed „Private Number‟. Subsequently, Gateman shall press ‘Open

Button’. This will transmit Private Number to Station and „Open Display ‟ will start flashing „- -‟ at LC

Gate Equipment. This will also clear Outgoing Private Number from „LC Gate Equipment‟.


Station Equipment and Audio Message will also start playing at Station Equipment. On pressing MUTE



concerned LC Gate. This will transmit Private Number to LC Gate. „Open Display‟ for concerned LC

Gate will also become Steady. This will also clear Outgoing Private Number from „Station Equipment‟.

(3) On receipt of above message from Station, Private Number will be shown in „Open Display‟. This will


Closing the Gate for Road Traffic (4) After Closing the Gate, Gateman shall feed ‘Outgoing Private Number’. Subsequently Gateman shall

press ‘Close Button’. This will transmit Private Number to Station Master and clear „Outgoing Private

Number Display‟ from „LC Gate Equipment‟. „Close Display‟ on LC Gate Equipment will also start

flashing „- -‟. This will also clear Outgoing Private Number from „LC Gate Equipment‟.

(5) On receipt of this message at Station, Incoming Private Number will be shown flashing on „Close Display

of concerned LC Gate and Audio Message will also start playing. On pressing MUTE Button by Station

Master for 1 Seconds, audio will stop playing. Station Master shall feed Private Number.

Subsequently Station Master shall press ‘Close Button’ of concerned LC Gate. This will transmit

„Private Number‟ to concerned LC Gate and „Close Display‟ for concerned LC Gate will become steady.

This will also clear Outgoing Private Number from „Station Equipment‟.

(6) On receipt of this Private Number from Station it will be shown in „Close Display‟ of LC Gate Equipment.

(7) On Pressing ‘Clear Button’ by Station Master for 1 Seconds, „Close Display‟ & „Open Display‟ will be

cleared.

(8) On Pressing ‘Clear Button’ by Gateman for 1 Seconds, „Close Display‟ & „Open Display‟ will be

cleared.

(D) Engineering/ Traffic LC Gate, Interlocked, Normally Open to Road

Traffic Intimation to Gateman for Approaching Train (1) To advise Gateman about approaching Train, Station Master shall feed Train Information [ ‘Train No.’,

‘Expected Time of Passage’ & ‘Outgoing Private Number’]. Subsequently SM shall press ‘Advise

Button’ of concerned LC Gate. This will transmit „Direction of Train‟, „Train No.‟, „Expected Time of


Passage‟ to LC Gate. „Advise Display‟ for concerned LC Gate on Station Equipment will also start flashing

„- -‟.

For a Group Message to more than one, Traffic, Interlocked, Normally Open to Road Traffic LC Gate,

Station Master shall press ‘Advise Buttons’ of all the concerned LC Gate simultaneously after feeding

the train information .

(2) On receipt of above messages at LC Gate, „Train No.‟ & „Expected Time of Passage‟ will be shown in

Main Display and Ad will flash in „Advise display‟. Audio Message will also start playing at LC Gate

Equipment. On Pressing ‘MUTE Button’ by Gateman for 1 Second, audio will stop playing. The

Gateman shall press ‘ACK Button’. This will make „Advise Display‟ steady.

(3) On receipt of this message „Ac‟ will be shown on „Advise Display‟ of concerned LC Gate on Station

Equipment.

(4) On Pressing ‘Clear Button’ by Station Master for 1 Seconds, Main Display and „Advise Display‟ will

be cleared.

(5) On Pressing ‘Clear Button’ by Gateman for 1 Seconds, Main Display and „Advise Display‟ will be

cleared.

10 GENERAL REQUIREMENT (Applicable for both Part-A & Part B

Equipments) 10.1 TECHNICAL REQUIREMENT:

10.1.1 Electrical Parameters for ASM Equipment and LC Gate Equipment

Sl. No Parameters Characteristics

A1

Power Supply

SMPS based battery charger

Input: 165 V to 260 V AC, 50Hz

Output: 12 V DC +/- 10 %, 15A

A2 Current Consumption

6 Amp max on wireless

800 mA max on 2–wire physical line

A3 Event Logging

i Number of Data events

ii Real Time Clock

iii Print-out

iv Voice Data Storage Capacity

Min 1 lac

Year, Month, Date, Hour and Minute

By connecting an DOT Matrix / inkjet printer.

Min 70 Hours

A4 Speaker Output Level 3 Watts

A5 Microphone Impedance 1 K

A6 Gate Identification number Two digits

A7 LCD display 16 x 2 alphanumeric, with back-lit LED

A8 RTC Battery backup Min one year

B1 GSRP( For Part A ASM

Equipment Only)

The seven segment LED display must be used

for Pvt No display. It must be of Green Color

and minimum 12 mm height. The Gateman

Specific Request Panel must operate on 12V DC

(+/- 20%) supply


10.1.2 25 Watt Radio: VHF radio set of 25 watt for wireless communication shall be shall be

MIL Grade, F/G compliant.

Spec of the Radio:

Sl No Parameters Characteristics

A. GENERAL A1. Frequency Range 146 to 174 MHz A2. Channel Spacing 12.5 kHz or 25 kHz A3. Emission 8K50F3E or 16KOF3E A4. Frequency Spread 28 MHz A5. Frequency Stability 5 PPM A6. Type of Operation Simplex / Semi - duplex, Press to talk A7. Operating Temperature Range -30

0 C to 55

0 C

A8. Speaker Impedance 4/8/16 Ω

B. TRANSMITTER B1. RF Power Output 10 to 25 Watt B2. Frequency Deviation +/- 5 kHz (W type), +/- 2.5 kHz (N type)

B3. Modulation Sensitivity 1 to 10 mV at 1 KHz at Mic. Input for (+/-) 1.5 KHz (for 12.5

KHz channel spacing) standard deviation.

B4. Modulation distortion Better than 5% B5. Modulation fidelity Within +1, -3 dB of 6 dB / Octave B6. Spurious and Harmonics -36 dBm (.25uW) B7. Output Impedance 50 Ω

C. RECEIVER C1. Sensitivity 0.3μv / -118 dbm at 12 dB SINAD C2. Selectivity Better than 60 dB C3. Image and Spurious rejection Better than 65 dB C4. AF distortion Better than 5% C5. Audio output Better than 250 mw with less than 5% distortion

at 1 kHz ref. measured at specified AF output. C6. Squelch Sensitivity Better than –119 dbm C7. AF Response Within +1 , -3 dB of 6 dB / Octave D Specs of Telephone Instrument Standard Telephone Instrument of reputed make such as Beetel,

Panasonic, Binatone, Uniden, Orpat or equivalent.

10.1.3 Specs of Microphone (Part - A ASM Equipment Only)

Sl

No

Parameters Characteristics

A1 Type Unidirectional Electric Condenser Microphone

A2 Frequency Response 50Hz-15 KHz

A3 Impedance 1 K

A4 Power Source 3V-9V DC

10.1.4 Specs of Stacked Dipole Omni Directional Antenna



A ELECTRICAL SPECIFICATIONS

A1 Frequency Range – MHz 146 - 174

A2 Bandwidth – MHz 10

A3 Impedance – Ohms 50 unbalanced

A4 VSWR – less than 1.5

A5 RF Power handling capacity – Watt 100

A6 Termination UHF – female

A7 Lightening Protection Direct Ground

B MECHANICAL SPECIFICATIONS

B1 Support Pipe Material Aluminum

B2 Support Pipe Length – feet 12

B3 Support Pipe O D – mm 50

B4 Support Pipe Wall Thickness – mm 2.5

B5 Radiating Elements Material Aluminum

B6 Radiating Elements Material O D – mm 12

B7 Radiating Elements Mounting Clamp Cast Iron / Aluminum

B8 Mounting Clamp for Antenna Cast Iron / Aluminum

B9 Shipping Length - Feet 6.5

10.1.5 Specs of Antenna Cable


A1 Length As per site requirement

A2 Size RG 217 Low Loss Cable

A3 Jacket Polyethylene Black

A4 Outer Diameter 14 mm

A5 Characteristic Impedance 50 + / - 1 ohm

A6 Average Power Rating 1.00 kW at 100 MHz

A7 Attenuation 0.05 B / Mt at 100 MHz

10.1.6 Specs of 12 Volts Battery (SMF battery)


A1 Voltage 12 V

A2 Backup Capacity Min 65 AH

A3 Can work with Radio 25 W

A4 Maintenance Maintenance Free

10.1.7 Terminals / Connectors:

10.1.7.1 It is necessary to terminate the 2Wire input lines through push-in Terminals /

Connectors to achieve lowest contact resistance & to avoid possibility of

corrosion due to different climatic conditions, all metallic parts of the connectors /

terminals should be non ferrous. The terminals & connectors should have locking

arrangement so that input lines to the equipment should not get disconnected

inadvertently.


10.1.7.2 D Link or similar make RJ11 & RJ45 connectors shall be used to connect the 2W

telephone sets / lines / PC to eliminate any inadvertent disconnection of the input /

output lines.

10.1.7.3 All other connectors like antenna, power and solar panel shall be lockable so that

it can not get disconnected inadvertently.

10.1.8 Provision of Earth Terminal shall be made in the Station Equipment and LC Gate

Equipment to extend Earthing. However the earthing arrangement shall be provided by

the Railways & is not the part of this specification.

10.2 Station Equipment should be designed such that it does not use any Operating System

Software for the operation. Also the Station Equipment design shall ensure faster speed of

operation between it and LC Gate Equipment.Station Equipment shall preferably use 16-bit

or higher data-bus microcontroller and shall consist of

MIL 810 F/G Compliant 25 Watt VHF Radio Set.

Omni Directional Stacked Dipole Antenna having SWR less than 1.5.

RG 217 Coaxial Cable.

GPS Receiver along with Antenna.

Power Supply.

Battery.

Solar Panel (optional).

Telephone Instrument (As per Appendix-1 ).

Electronic Circuit including, Data Logger, Voice Logger, Storage Etc.

10.3 ( For Part B Only) LC Gate Equipment should be designed such that it does not use any

Operating System Software for the operation.. Also the LC Gate Equipment design shall

ensure faster speed of operation between it and Station Equipment. LC Gate Equipment

shall preferably use 16-bit or higher databus microcontroller and shall consist of

MIL 810 F/G Compliant 25 Watt VHF Radio Set.

Omni Directional Stacked Dipole Antenna having SWR less than 1.5.

RG 217 Coaxial Cable.

Power Supply.

Battery.

Solar Panel (optional).

Telephone Instrument. (As per Appendix-1 ).

Electronic Circuit including, Data Logger, Storage etc.

10.4 (For Part B only) Station Equipment and LC Gate Equipment shall work with 12 V +/-

10% DC Power Supply, Current Consumption of Station Equipment/LC Gate Equipment

shall be 10 Amp Maximum while working on Wireless Mode and shall be 1 Amp

Maximum while working on Wired Model for Station equipment with standard

configuration and 1.5 Amp Maximum while working on Wired Model for Station

equipment with optional configuration.


10.5 (For Part B only) SMPS Power Supply shall be supplied along-with Station Equipment,

Power Supply shall consist of Battery Charger having 165-260 V, 50Hz AC Input Power

Supply and having following outputs:

27.2V+/- 0.5V DC, Output with current capacity of Minimum 15 Amp.( For

feeding power to telephone instrument at LC Gates from centralized place in

„Standby Mode‟)

11.4V –13.2 V DC Output with current capacity of Minimum 10 Amp (For Local

Use)

Power Supply in addition to supplying the load shall also Charge 24Volt(12V+12V)

Sealed Maintenance Free Battery, provided for backup of at least 24 hours. The capacity

of battery shall not be less than 120 AH. However, Railway may plan for a higher

capacity of the battery to commensurate with the Load and Backup Period requirements.

10.6 (For Part B only) SMPS Power Supply shall be supplied along with each LC Gate

Equipment. This SMPS Power Supply shall work with 165-260 V, 50Hz AC Input Power

Supply and produce 11.4V –13.2 V DC Output Power supply with current capacity of

Minimum 10 Amp. Power Supply in addition to supplying the load shall also Charge 12

Volt Sealed Maintenance Free Battery. The capacity of 12 Volts sealed Maintenance Free

Battery shall be 120 AH. The Sealed Maintenance Free Battery is provided for backup of

at least 96 Hours (for wired operation).

10.7 In case purchaser decides to provide solar power as additional source of power supply as

indicated in Para 10.4 of this specification, Solar Panel Modules with Nominal Voltage of

12 Volt and Nominal Output Power of 80 Watt as per IRS:S 84/92 with Latest

Amendments shall be provided at Level Crossing Gate. Mounting Bracket & Bracing

Plate for Solar Panel Modules, shall be as per requirement of site and as selected by the

Purchaser amongst the options given in IRS:S 84/92 with Latest Amendments. However

actual requirement of number of Solar Panels & its capacity may be specified by the

Purchaser based upon the actual site requirement for 96 Hrs backup. Purchaser may also

decide to adopt any other RDSO specification for the provision of Solar Power Supply.

10.8 Speaker Output Level shall be 3 Watt Maximum. Knob to adjust Speaker Output Level

shall be provided at Station Equipment.

10.9 The LCDs used for System Information with Station Equipment as well as LC Gate

Equipment must meet the following minimum specifications.

Display Content 16 Char x 2 Row

Character Dots 5x8 or 5x7

Character size 9-10 mm x 4-5 mm

LCD Display Type STN or FSTN

LCD Category Transmissive or Transflective

Minimum Viewing Angle Horizontal -60º, Vertical - 90º


10.10 The LCD used for Train Information with Station Equipment as well as LC Gate

Equipment must meet the following minimum specifications ( For PART B Only):

Display Content 20 Char x 4 Row

Character Dots 5x8 or 5x7

Character size 9-10 mm x 4-5 mm

LCD Display Type STN or FSTN

LCD Category Transmissive or Transflective

Minimum Viewing Angle Horizontal -60º, Vertical - 90º

10.11 (For Part B only) Seven-Segment Displays used for Private Number display with Station

Equipment as well as LC Gate Equipment shall be of Industry Standard and Height of 9-

10 mm .

10.12 LEDs used for Station Equipment and LC Gate Equipment shall be SMD type with

minimum viewing area of 3.6 mm x 3.2 mm

10.13 The system shall comply para 2.2.1.

10.14 Normally voice as well as data communication between Station Equipment and LC Gate

Equipment will be through 2-Wire Physical Media. In case of Physical Line failure,

alternate Wireless Medium shall work. There shall be dynamic switching to select first

(i.e. Wired medium ) available working medium.

10.15 Physical Line or Radio indication shall appear on Station Equipment as well as LC Gate

Equipment so the advise to the maintenance staff shall be made without delay in case of

Physical Line failure.

10.16 Physical Communication Line Protection: Surge/Transient Protection shall be

supplied and provided between Station/LC Gate Equipment and 2-Wire Physical

Communication Line in Series. The Surge Protective Device (SPD) should be as per the

IEC 61643-21 or in compliance with UL Specification. Surge Protective Device shall

be supplied along-with Mounting, Termination & Housing Arrangement. Surge

Protective Device shall meet following requirements:

Pluggable Device along with Base

Maximum Continuous DC voltage: 170 V

Total Nominal Discharge Current (8/20 µs pulse): 10KA

Impulse Limiting Voltage/Let Through Voltage: Line – Ground for 1 KV/ µs

pulse: 1000KA

DC Spark Over Voltage of voltage limiting component: 230 V (-20% to +30%)

Operating Temperature range: - 10º C to +60ºC

Relative Humidity: 5% to 95%

Degree of Ingress Protection: IP 20.


Bandwidth: 2.3 MHz minimum

No. of wires : 2 Wire/4 Wire

The Voltage Limiting Device shall fail in Short Circuit Mode.

Nominal Load Current: Not less than 120 mA.

Figure 10.1: Connection arrangement for Control Line

10.17 Power Line Protection (at the 230V AC Input of SMPS Power Supply of Station /LC Gate

Equipment): (a) The Stage 1 protection shall consist of coordinated Class I/ B & II/ C type SPDs

at the entry point of Input 230V AC supply in TT configuration in a separate wall

mountable box. The Class I/B SPD shall be provided between Line to Neutral &

Neutral to Earth. They shall be a voltage switching device and tested as per IEC 61643

with the following characteristics and features-

SN Parameters Limits

Between Line &

Neutral

Between Neutral

& Earth

1 Nominal Voltage (U0) 230V 230V

2 Maximum continuous operating voltage (Uc) 255V 255V

3 Lightning Impulse current 10/350s (Imp) 25KA 50KA

4 Response time (Tr) 100 ñs 100 ñs

5 Voltage protection level (Up) 2.5KV 2.5KV

6 Short circuit withstand and follow up

current extinguishing capacity without back

up fuse (Isc & Ifi)

3KA 100A

7 Temporary Over Voltage (UT) 400V min. for 05

secs.

1200V min. for

200ms

8 Operating temperature / RH - 10oC to +60

oC/

95%

- 10oC to +60

oC/

95%

9 Mounted on DIN rail DIN rail

10 Indication Mandatory Optional

11 Pluggability Optional Optional

12 Potential free contact for remote monitoring Optional Optional


13 Encapsulation Encapsulated Encapsulated

14 Degree of protection IP20 IP20

15 Housing Fire retardant as

per UL 94

Fire retardant as

per UL 94

(b) The Class I/ B SPD will be followed by Class II/ C SPD adjacent to it and

connected between Line & Neutral. The device shall be a single compact varistor of

proper rating and in no case a number of varistors shall be provided in parallel. It shall be

voltage clamping device, thermal disconnecting type and shall be tested as per IEC 61643

with the following characteristics and features-

SN Parameters Limits (between Line &

neutral)

1 Nominal Voltage (U0) 230V

2 Maximum continuous operating voltage (Uc) 300V

3 Nominal discharge current 8/20s (In) 10KA

4 Maximum discharge current 8/20s (Imax) 40KA

5 Response time (Tr) 25 ñs

6 Voltage protection level (Up) 1.5 KV

7 Operating temperature / RH - 10oC to +60

oC/ 95%

8 Mounted on DIN rail

10 Indication Mandatory

11 Pluggability Mandatory

12 Potential free contact for remote monitoring Mandatory

13 Degree of protection IP20

14 Housing Fire retardant as per UL 94

(c) Class I/B and class II/C SPDs of Stage I shall be so coordinated that the voltage

protection level of the coordinated devices is 1.5 KV. As such, these devices shall be

from the same manufacturer and necessary test certificate in this regard shall be

submitted by the manufacturer/ supplier.


Figure 10.2 :Connection of SPD for Power Line

10.18 Lightening Arrestor for Antenna: The provision of Lightning Arrestor for Stacked

Dipole Omni-Directional Antenna shall be made to protect the Radio Set from lightning or

EMI. The protection system as described shall be earthed with the equipment earth.

Lightening Arrestor for protection of 25 watt VHF base station sets, to be provided on

coaxial cable.

Max. continuous DC Voltage : 180 V

Nominal load Current: 1 Amp

Nominal discharge current (8/20 µs) Core-Ground: 10kA

Impulse limiting voltage/Let through Voltage Core – Ground (1kV/ µs pulse):

1000 V

Operating temperature range: - 10ºC + 60ºC

Relative humidity: 5% to 95%

Degree of protection: IP 20 for providing near the equipment. And IP 54 for

providing near antenna.

Connector: BNC/N/UHF connector or any other connector (As specified by the

purchaser).

Bandwidth: 200 MHz Minimum

Insertion loss 0.2 dB maximum in 136-174 MHz

Power Handling: 50 Watts

Characteristic impedance: 50 ohms


10.19 Data Logging: The system shall have Data Logger to record all the events automatically

with Date, Time, Train Number, Direction, Gate Number and exchanged Private Number

between ASM and LC gateman, which can be retrieved by connecting a printer or data can

be transferred to LAPTOP. The data of events shall be simultaneously logged in both ASM

and LC Gate Equipment. The timing of all the gate telephones connected with ASM unit

shall be synchronized with ASM clock once in 24 hour.

10.19.1 ASM equipment and LC gate equipment shall have facility to record all the events

related to their operation including event of Voice communication.

10.19.2 Data Storage Capacity: ASM equipment and LC gate equipment shall have

facility to store minimum one-lakh events as explained in Clause no 10.19.

10.19.3 The data shall be stored in the FLASH EEPROM memory so that the stored

events can not be erased in case of power failure or fluctuations.

10.19.4 When the Flash EEPROM memory will be full with the logged data , then „FIRST

IN „ information will be „FIRST OUT‟ from the memory i.e. The system will

follow FIFO architecture.

10.20 Print Out: Print Out: All the events recorded by the Data-logger can be

downloaded / printed by connecting Dot Matrix /deskjet/ laserjet COTS Printer on

the assigned port of the ASM equipment and LC Gate equipment by pressing

„PRINT‟ button and entering the date. Provision shall be made to take printout

from LC gate equipment. ASM on duty can take print out on daily basis as per his

requirement or as defined by the user of the equipment. Printout format of

retrieved data shall be as follows ======================================================

Sl No DATE TIME MODE FROM GATE PVTN ACTIVITY

======================================================

000 16/08/2003 11:33 LINE GATE 23 -- GATE OPEN REQUEST

001 16/08/2003 11:34 LINE STN 23 56 CLOSE FOR 5698 UP TRAIN

002 16/08/2003 11:41 LINE GATE 23 45 EXCHANGE FOR ASM PVT NO.

003 16/08/2003 11:42 LINE GATE 23 -- VOICE CALL

004 16/08/2003 11:44 LINE STN 23 47 CLOSE FOR 5698 DN TRAIN

005 16/08/2003 12:10 LINE GATE 23 45 EXCHANGE FOR ASM PVT NO

006 17/08/2003 14:54 RADIO GATE 25 -- GATE OPEN REQUEST

007 17/08/2003 14:55 RADIO STN 25 56 OPEN GATE

008 17/08/2003 14:55 LINE STN 23 -- DON'T OPEN GATE

10.21 Voice Logging:

10.21.1 The system should be designed in such a way that it should have built-in arrangement to

process, record and store any ongoing voice communication from ASM Unit to LC Gate

Units and Vice Versa.


10.21.2 The recording and storage of voice communication should start as soon as call is

established between ASM Unit and LC Gate Units and the same should be terminated

with the replacement of handset of the telephone instrument provided with LC Gate and

ASM Units. The recorded voice data shall be stored with date and time stamping.

10.21.3 The storage of voice data should be arranged in FIFO architecture and in no way it should

get corrupted once it is stored.

10.21.4 The voice communication file storage device should have provision of its removal in case

of emergency but it has to be interfaced in such a way that removal should not be

possible by an unauthorized or unwanted person.

10.21.5 There shall not be any compression of the input voice signal to retain the originality of

the recorded voice communication. The storage device recording capacity shall be 70 Hrs

minimum.

10.22 Retrieval of Voice Communication Data: There shall be an Ethernet interface port

through which stored voice data can be transferred from ASM Unit to any PC / Laptop

for listening and taking backup on CD / DVD media. If required, voice can be retrieved,

played and listened through the speaker provided in the ASM Unit by simple operation

using keyboard of the unit. Facility shall also be available for selection of any voice/ data

for playing by entering desired date and time for specified duration.

10.22.1 In case of any problem in voice recording, there shall be visual alarm to draw the

attention of the ASM on duty, the same shall keep on glowing till such time

acknowledged by the ASM.

10.22.2 The distortion of the recorded voice input signal when reproduced through speaker shall

not be more than 5% w. r. t. original input signal.

10.23 Station Equipment shall be equipped with GPS Clock. LC Gate Equipment shall have

inbuilt RTC Clock, which shall synchronize itself with Station Equipment GPS Clock

once every 24 Hour.

10.24 Keys used for Station Equipment and LC Gate Equipment shall be preferably of

embossed Membrance Type of minimum 1cm x 1cm size or Momentary Pushbutton

Type with protection from dust ingress.

11 TESTING & INSPECTION( Applicable for both Part A and Part B):

11.1 Type Test : Type Test shall comprise of the following Inspection/Test/Trial.

11.1.1 Visual Inspection

11.1.2 Applied High Voltage Test

11.1.3 Endurance Test

11.1.4 Performance Test

11.1.5 Climatic Test

11.1.6 Vibration Test

11.1.7 Surge & Transient Test

11.1.8 Final Performance Test

One „Station Equipment‟ and „LC Gate Equipment‟ with wireless feature with all

accessories shall be tested during Type Test. The „Station Equipment‟ and „LC Gate


Equipments‟ shall successfully pass all the Inspection/Test/Trial for proving conformity

with this specification. If any of the equipment fails in any of the Inspection/Test/Trial,

RDSO may call for further equipment(s) and subject it to all the tests or to the test(s) in

which failure occurred. No failure shall be permitted in the repeat test(s).

11.2 Acceptance Tests: Acceptance Test shall comprise of the following Inspection/Test.

11.2.1 Visual Inspection

11.2.2 Applied High Voltage Test

11.2.3 Performance Test

11.2.4 Endurance Test (8 Hours Burn-in Test)

Acceptance Test shall be carried out on all Station Equipment. For LC Gate Equipment,

the Double Sample Plan given as below shall be adopted during Acceptance Test: Lot consisting LC Gate

Equipment

1st Sample

size (N1)

2nd

Sample

size (N2)

Combined

Sample size

(N1 + N2)

Acceptance

Number (C1)

Rejection

Number

(C2)

1 2 3 4 5 6

Under 25 3 6 9 0 2

25 to 50 7 14 21 0 3

51 to 100 10 20 30 0 3

101 to 200 13 26 39 0 5

201 to 300 20 40 60 1 5

301 to 500 25 50 75 1 6

The number of LC Gate Equipment (N1) as given in Column „2‟ shall first be selected

and subjected to the Acceptance Test. If in the first sample, the number of defective LC

Gate Equipment, that is those failing in one or more acceptance test is less than or equal

to the corresponding number (C1) given in Column „5‟, that lot shall be considered as

conforming to the requirement of the acceptance test. If the number of defective level

crossing gate equipment in the first sample is greater than or equal to the rejection

number in Column „6‟, the lot shall be considered as not conforming to the requirements

of the acceptance test. If number of defective level crossing gate equipment in the first

sample lies between C1 and C2 a second sample of size N2 as given in Column „3‟shall

be selected and subjected to the acceptance test. If in the combined sample, the number of

defective level crossing gate equipment is less than C2, the lot shall be considered as

conforming to the requirement of acceptance test.

Note- If Wireless is not a required option only wireless feature will not be available other features of

equipment will be available and tested during inspection. 11.3Routine Tests : Routine Test shall be conducted by manufacturer on every equipment and

test results will be submitted during the inspection. Routine Test shall comprise of the

following:

a) Visual Inspection

b) Applied High Voltage Test


c) Performance Test

d) Burn-in Test as per Cl.12.4

12 Description of test:

12.1Visual Inspection:

12.1.1 The equipment shall be visually inspected to ensure that it is free from any cracks or any

other imperfection including marking and painting etc.

12.1.2 The equipment shall be checked to satisfy general requirement of Marking & Packing.

12.1.3 The visual inspection shall be carried out to ensure that the equipment is of sound

construction and, meets its specified requirement of Specification.

12.2 Applied High Voltage Test: The equipment shall with stand without any damage a test

voltage of 1KV, applied for a period of one minute, between the body and all the current

carrying terminals looped together.

12.3 Endurance Test: The equipment shall be capable of withstanding Burn-In Test for 72

hours during Type Test (8 Hours during Acceptance Test) at an ambient temperature of

50(+ 2) ºC when the equipment is working. This test may be performed in a temperature-

controlled room with free airflow. The ambient temperature shall be measured at a distance

of 1 foot from the equipment under test. The necessary set up for the purpose shall be

provided by the manufacturer.

12.4 Burn In Test: The equipment shall be burn – in for a period of one day at 50o C prior to

the actual measurement of the parameters. During the burn-in, the equipment shall be kept

in „ON‟ condition.

12.5 Performance Test: The Performance Test shall include comprehensive series of

measurements of the characteristics of the equipment to check that its performance is in

accordance with the functional requirements of the particular equipment concerned,

including any special requirements of its individual specification. The Performance Test

shall also include Power Supply Variation Test and Power Supply Interruption Test.

12.6 Climatic Test: The ranges of ambient temperature and humidity within which the

equipment performance will be tested as per QM-333, Table 4.3, Category- B as given

below

a. Ambient temp. range over which specification

are guaranteed ( 50% RH at max. temp.)

0°C to

50° C

b. Ambient temp. range over which equipment is to

remain operational without causing irreversible

damage (50% RH at max. temp)

-5° C

to

55°C

Applicable for

thermal cycle only

c. Storage temperature (50% RH at max. temp)

without causing irreversible damage.

-5° C to

60°C

d. Max. temp. for which specification are

guaranteed at 95% humidity

35° C Applicable for

damp heat steady

state

e. Maximum temp. range at which Equipment shall

survive at 95% RH

40° C

The environmental testing shall be conducted at per specification No. QM 333 for

environmental testing of electronic equipment for transmission and switching use


issued by DOT in Sept. 1990 (with latest amendment). The testing shall be as per

category „B2‟ and following tests shall be carried out.

12.6.1 Dry Heat : 55 ±2ºC, Duration : 12 hours 12.6.2 Damp heat Cyclic, Duration 12 hours , First cycle of two cycles.

Upper temperature 40º C Variant:1

12.6.3 Rapid temp. cycling Low Temperature : -0º C ± 3º C High Temperature : 55º C ± 2º C Rate of change of temperature over a period of not more than 5 minutes shall be ±0.2º C per minute. Duration of Exposure: 3 hours

12.6.4 Damp heat steady state Duration : 4 days Temperature : 35 ±2º 0 C

Relative Humidity: 95 + 0 or 95 –2% in the temperature range

12.7 Vibration

12.7.1 Frequency: 5 to 350 Hz

12.7.2 Vibration Amplitude: +/- 6 mm constant displacement 12.7.3 Duration at Resonance: 2 hours at each axis

12.7.4 Magnitude of “g”: 1.5

12.8 Surge & Transient Test: Station Equipment, LC Gate Equipment shall undergo

Basic Immunity Requirement Tests of Surge & Transient as follows: 12.8.1 2-Wire Physical Communication Line Port of station Equipment & LC Gate

Equipment shall be tested for Basic Immunity Requirements of Surges as per Test Method IEC 61000-4-5. During this test, 5 (five) Pulses of 10/700µS with

Amplitude of 1.0 KV (CM) and 0.5KV (DM) each in Positive as well as Negative Polarity shall be applied. During and after the Test, Station Equipment & LC Gate

Equipment shall continue to operate as intended without any malfunctioning and degradation in performance.

12.8.2 2-Wire Physical Communication Line Port of Station Equipment & LC Gate Equipment shall also be tested for Basic Immunity Requirements of Fast

Transient as per Test Method IEC 61000-4-4. During this test, Pulses with

Amplitude of 0.5KV each in Positive as well as Negative Polarity shall be applied. During and after the test, Station Equipment & LC Gate Equipment shall

continue to operate as intended without any malfunctioning and degradation in performance.

12.8.3 230V AC Power Supply Port of SMPS Power Supply of Station Equipment as well as LC Gate Equipment shall be tested for Basic Immunity Requirements of

Surges as per Test Method IEC 61000-4-5. During this Test, 5(Five) Pulses of 1.2/50µS with Amplitude of 1.0 KV (CM) and 0.5 KV (DM) each in Positive as

well as Negative Polarity shall be applied. During and after the Test, Power

Supply shall continue to operate as intended without any malfunctioning and degradation in performance.


12.9 Final Performance Test : After completion of all above said tests as explained above , Final

Performance Test shall be conducted.

13 TYPE APPROVAL : 13.1 The „Level Crossing Gate Control & Monitoring System‟ should have Type Approval

from RDSO. The type approval process shall include complete Type Test to check the

compliance of the specified parameters.

13.2 The Type Test shall be conducted at RDSO/Lucknow.

13.3 Performance Tests will not be carried out on 25 Watt Radio. Firm will have to submit

documents related to compliance of MIL grade 810 F/G for the Radio equipment used.

13.4 After successful completion of Type Test, Type Approval may be processed.

14 Warranty:The equipment shall have a minimum warranty of 1 year with a liability of

technical support like stores, AMC and technical guidance for another 5 years or as per the

tender requirements of the Railway

15 MARKING & PACKING: Equipment shall be suitably packed so as to avoid any damage

or loss during storage and transit. The following information shall be clearly

Embossed/Engraved/Screen Printed at a conspicuous places.

a) Item Name

b) RDSO Specification No.

c) Name or Monogram of the Manufacturer

d) Year of Manufacture

e) Serial Number

16 TECHNICAL LITERATURE: Technical literature consisting of Principles of Working,

Circuit / Block Diagram Maintenance and Trouble Shooting Procedures, Assembly

Drawing, Spares Parts Catalogue, Printed Card Layout Diagram, shall be supplied along

with equipment unless otherwise not desired by the user Railway.

17 INFORMATION TO BE FURNISHED BY PURCHASER

a) System required as per Part-A/ Part-B

b) Capacity of Battery as defined in Clause 2.2.2, 2.2.3 for Part-A and Clause 10.5,

10.6 for Part-B.

c) Length of Antenna Cable as per Clause 10.1.5 (A1).

d) Antenna Specification: If purchaser wishes to procure any other type of

antenna depending upon the site requirement instead of Omni Directional Antenna

as defined in Clause 10.1.4.

e) No. of LC Gates to be controlled on either side of Station in the Station Equipment

f) Language option for messaging. (Clause 2.1.4 for Part-A and Clause 8.4 for Part-B)

g) Wireless feature required/Not required. As a default wireless feature will be

available.

18 All the provisions contained in RDSO‟s ISO procedures laid down in Document No. QO-D-

8.1-11 Ver 1.1 dated 08-05-2019. (titled “Vendor-Changes in approved status”) and

subsequent versions/amendments thereof, shall be binding and applicable on the successful

vendor/vendors in the contracts floated by Railways to maintain quality of products supplied

to Railways.

*****END*****

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