80 Questions
What is the primary purpose of the Coach Guidance System?
To enable passengers to locate their coach
How should the wiring of the data cable and power cable be done?
Through separate PVC/HDPE or DWC pipes
What is the recommended method for terminating the data cable?
Using proper terminal strips or connectors
Why should the display boards be installed with care?
To prevent obstruction of signal visibility
What material should be used to fix the GI angles to the inner side walls of the display boards?
Metallic clamps
What is the purpose of using flexible corrugated pipes?
To improve the aesthetics of the display unit
Who should be involved in checking the installation of display boards?
The Signal supervisor and the installation team
What is the recommended type of connector to be used for terminating the data cable?
A connector of standard size from a branded/reputed make
What is the primary consideration in designing the Train Indication System?
Immunity to failures and ease of maintenance
What should be provided at the 230V AC mains end and output of power supply to protect electronic modules from damage?
GD tubes, MOVs, and fuses
Where should the electrical power supply for all Train Indication Boards be provided from?
A centralized place in the station
What should be installed in a secure manner to prevent unauthorized access?
The Operating Console and associated equipment
What arrangement should be provided for housing the wires in the 19” housing cabinet?
Cable ducts and cable management systems
What should be the primary consideration for designing the system for 25 KV AC traction areas?
Proper earthing arrangement to prevent EMI and RFI interference
What is the recommended arrangement for laying data and power cables over metallic structures under platform sheds?
Using a common cable tray inside platform sheds for all types of cabling
What should be provided for the data cable to prevent EMI and RFI interference in 25 KV AC traction areas?
Earthing arrangement for grounding the shield of the data cable
What is the maximum interval at which metallic clamps should be fixed to hold pipes carrying cables?
5 mtrs
What should be installed in the announcer's cabin or at remote locations at the station?
Operating Console (Central Data Controller)
What is the recommended size of the cabinet for housing standard computer accessories?
19” cabinet
What is the primary concern while designing the metallic hanging arrangement for display boards?
Preventing accidental dislocation
What is the recommended material for the angles used to hang display boards from the platform roof?
G.I. angles
What is the primary purpose of using metallic clamps to hold pipes carrying cables?
To prevent sagging of cables
What is the recommended location for hanging display boards in FOBs?
From the FOBs roof
What is the primary concern while installing display boards in FOBs?
Preventing swinging due to wind or movement
What is a crucial feature of the display board at the entry or lobby of a train station?
Displaying the platform number and train number
Why is it necessary to blank the complete display board when there is no data signal from the operating console?
To prevent stray dots from lighting up
What is essential for achieving optimum visibility of the display boards?
Providing proper weather protection and glare protection
What is the purpose of providing input power_ON indication outside the display board?
To indicate when the power is on and the board is operational
What is the primary consideration for mounting the equipment of the Coach Guidance System?
Protection from dust and temperature rise
What is essential for the Coach Guidance Display Board to ensure optimal performance?
Conformance to typical layout and approval from Railways
What is the primary benefit of providing coach guidance boards at the station and platform?
Improving the overall passenger experience
What is the purpose of providing EMI & RFI protection for the Coach Guidance System equipment?
To reduce the electromagnetic interference and radio-frequency interference
What is the primary source of data for the software to acquire updated information of running trains?
NTES/COIS or any central server
What is the primary function of the local operator in the system?
To cross-examine the auto-derived information and correct it before announcement/display
What type of message can be announced/displayed by the system?
Various messages including late arrival, platform number changes, and cancellations
What is the requirement for voice files used in announcements?
They should be recorded by the same announcer
What is the provision for adding new coach types to the system?
There is a provision for adding a new coach type in the coach master database
What is the requirement for announcing/displaying newly added trains?
It should be automatic without any recording to be modified
What is the primary function of the display boards in the system?
To display announcements related to train arrival and departure
What is the primary function of the PA system in the system?
To make announcements related to train arrival and departure
What should be done to protect electronic modules from damage in the Train Indication System?
Providing surge and lightning protection arrangement at 230V AC mains end and output of power supply
Where should the electrical power supply for all Train Indication Boards be provided from?
A centralized place
What should be the primary consideration in designing the Train Indication System?
Ease of maintenance and immunity to failures
What should be provided to prevent EMI and RFI interference in 25 KV AC traction areas?
Proper earthing arrangement for grounding the shield of the data cable
What should be installed in a secure manner to prevent unauthorized access?
The workstation and associated equipment
What should be provided for housing the wires in the 19” housing cabinet?
All of the above
What should be the primary consideration for designing the Train Indication System for 25 KV AC traction areas?
Proper earthing arrangement for grounding the shield of the data cable
What should be provided in the operating console?
Required software and provision of data entry for train no, time table of Trains, PF.No. & Expected Arrival / Departure time etc.
What is the format of the fixed audio messages recorded in the AUTO Announcement System?
Digital
What is the primary consideration for designing the AUTO Announcement System's software?
Ease of use for the Railway Engineer
What is the purpose of the provision to select messages and language for announcement?
To allow for customization of announcements
Where should the voice recording for the AUTO Announcement System be done?
In a soundproof professional studio
What is the primary consideration for the installation of the AUTO Announcement System at stations?
To cover the Concourse and Platform area
What is the requirement for the announcement of newly added trains?
They should be announced automatically
What is the primary benefit of the AUTO Announcement System's user-friendly interface?
It allows for easy addition and alteration of announcements
What is the requirement for the speakers, microphones, and acoustical environment in the AUTO Announcement System?
They should be of standard make and as per RDSO specification
What is the recommended way to lay data and power cables over metallic structures under platform sheds?
In separate DWC/HDPE/PVC pipes
What is the primary consideration for designing the metallic hanging arrangement for display boards?
Mechanical load and safety
What is the recommended size of the cabinet for housing standard computer accessories?
19 inches
At what interval should metallic clamps be fixed to hold pipes carrying cables?
Every 5 meters
What material should be used to hang display boards from the platform roof?
G.I. angles
What is the primary concern while designing the display board installation?
Safety and security
Why should the display boards be hung from the platform roof?
To prevent accidental dislocation
What is the primary benefit of using separate pipes for data and power cables?
Enhanced safety
What should be provided at the entry or at lobby of a train station?
A suitable Display board indicating the Train No., Platform No., arrival / departure time
Why is it necessary to blank the complete display board when there is no data signal from the operating console?
To prevent stray dots from lighting up
What should be provided to achieve the optimum visibility of the display boards?
Proper weather protection and glare protection
What is the primary consideration for mounting the Coach Guidance System equipment?
Industrial grade metallic housing with earthing for EMI & RFI protection
What should be provided on the platform at various locations?
Indicator with respective coach location board
What is the purpose of providing input power_ON indication outside the display board?
To help maintenance personnel
What is essential for the Coach Guidance Display Board to ensure optimal performance?
Conformity to typical layout and approval by Railways
Why should the display boards be installed with care?
To avoid damage to the display board
What is the primary function of a Master Clock in a railway premises?
To drive other Slave Clocks to keep uniform timing
What is the benefit of using GPS clocks in a railway premises?
They can be used as Master Clocks or Slave Clocks
How do Slave Clocks operate in a railway premises?
They are driven by the Master Clock to keep uniform timing
What is a potential issue that can affect the reliability of GPS signals in a railway premises?
EMI noise and power transients
What is an essential component of a reliable power supply system in a railway premises?
Backup power source
Why is it important to provide EMI noise and power transient protection for the Coach Guidance System equipment?
To prevent damage to the equipment
What is the primary consideration for designing a power supply system for a railway premises?
Reliability and backup power source
What is a benefit of using a GPS clock as a Master Clock in a railway premises?
It improves the accuracy of the Slave Clocks
Study Notes
Indicator System Design
- The indicator system should be designed to minimize operator operations for initiating and completing the data entry process.
- The system should have surge and lightning protection arrangements at the 230V AC mains end and power supply output to protect electronic modules from damage.
- The system should be designed to suit 25 kV AC traction areas, with proper earthing arrangements to prevent EMI and RFI interference.
Operating Console (Central Data Controller)
- The operating console should be installed in the announcer's cabin or remote locations at the station.
- The console should have required software and provision for data entry for train numbers, timetables, platform numbers, and expected arrival/departure times.
- The workstation and associated equipment should be installed in a secure manner, with adequate arrangements for housing wires and cables.
Coach Guidance System
- The Coach Guidance System enables passengers to locate their coach for the train they wish to travel on.
- The system consists of at-a-glance display boards at station lobbies and coach guidance boards at platforms.
- The coach guidance boards should conform to typical layouts approved by Railways, depending on location and need.
Installation and Wiring
- Data and power cables should be laid in separate PVC/HDPE/DWC pipes, suitably fixed along the route or in a common cable tray.
- Suitable metallic clamps should be fixed at regular intervals to hold the pipes carrying the cables.
- Display boards should be hung from the metallic structure of the platform roof or FOBs, with a secure hanging arrangement to prevent accidental dislocation.
- The display boards should have input power-on indication outside the board and be clearly visible under normal ambient conditions.
Protection Arrangement
- The equipment should be mounted in metallic housing to avoid dust entry and temperature rise.
- The arrangement should provide complete EMI and RFI protection, with necessary earthing and protection devices.
Software and Data Management
- The software should be able to acquire updated data of running trains from NTES/COIS or any central server.
- The software should process updated data of running trains to display on various types of display boards, coach guidance systems, and announcement on PA systems.
- The auto-derived information should be cross-examined by the local operator and corrected before announcement/display.
- Provision should be made for adding new coach types in the coach master database.
Passenger Information System
- The Telecom department of Indian Railways provides various types of Passenger Information Systems, including:
- Interactive Voice Response System (IVRS)
- Prerecorded Announcement and Auto Announcement System
- Train Indicator
- Coach Guidance System
- GPS Clock/Master Slave Clock
Interactive Voice Response System (IVRS)
- Provides information on Train Running, Passenger PNR, etc. through a centralized database
- Can be accessed through PSTN / Mobile Network
Prerecorded Announcement and Auto Announcement System
- Provides information to the public on PSTN Telephone regarding Train Running Information
- Can also work as an Announcement System on Platforms with suitable interface to PA system
Train Indicator
- A display device that provides information on Train Arrival/Departure timing and Platform No.
- Can be operated locally at a particular station or fed from a Central location
- Typically provided at Platforms and Public utility locations
Coach Guidance System
- A display device that indicates the position of each coach from the engine with description of train number and Coach Position
- Consists of coach guidance boards at Station and platform operated through PC workstation at remote location/control offices or at Stations
GPS Clock/Master Slave Clock
- Master Clock is a controlling clock in Railway premises that drives other Slave Clocks to keep uniform timing
- Slave Clocks are clocks in the Railway premises driven by the Master Clock
- GPS clocks may be provided independently or used to work as Master Clock/Slave clock
Design and Installation Requirements
- The system should be designed to minimize the number of operations for initiating and completing the entire process of data entry
- Surge and lightning protection arrangement should be provided to protect electronic modules from damage
- The system should be designed to suit 25 KV AC traction areas and have proper earthing arrangement to prevent EMI & RFI interference
- Electrical power supply for all Train indication Boards should be provided from a centralized place
- Ease of maintenance and immunity to failures should be the primary consideration in the design of the system
- The operating console should be installed in a secure manner with required software and provision of data entry for train no, time table of Trains, PF.No., and Expected Arrival/Departure time
- The workstation and associated equipment should be installed in a secure manner with adequate arrangement for housing wires and cables
Operating Console (Central Data Controller)
- Should have required software and provision of data entry for train no, time table of Trains, PF.No., and Expected Arrival/Departure time
- Should be installed in a secure manner with adequate arrangement for housing wires and cables
Auto Announcement System
- Should be PC/Server based with user-friendly GUI for the announcement of various messages related to train operations/safety
- Fixed audio messages should be recorded in digital format and added to audio files list in the PC/Server
- Should be possible to make repeated announcements without affecting other operations
- Should be possible for the operator to stop the announcements being played
- Software should be user-friendly to allow for addition and alterations by Railway Engineers without the help of suppliers and programmers
- Should have provision to select messages and language for announcement
- The entire voice recording for this system should be done in a sound proof professional studio
Laying of Data and Power Cable
- Should be carried out in separate DWC/HDPE/PVC pipes suitably fixed along the route or preferably a common arrangement of cable tray inside platform sheds for all such type of cabling
- Suitable metallic clamps should be fixed at regular intervals (not more than 5 mtrs) to hold the pipes carrying the cable along with the metallic structures/girders to avoid any sagging of the Data & power cable
Design principles for an indicator system in 25 kV AC traction areas, including surge and lightning protection, earthing arrangements, and operating console considerations.
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