Tender invited for Development of Train Collision Avoidance System

ISO 9001: 2008 Effective from 18.06.2012 RDSO/SPN/196/2012 Version 3.1.1
Document Title : Specification of Train Collision Avoidance System
6.44. When Loco unit does not have the signal ID of the signal being approached
due to either re-start of Loco unit or after passing RFID tag (which is 2000m
from FSS) at the start of TCAS territory or passing Signal at Danger after
following the prescribed operating rules or due to any other reason, Loco TCAS
shall request for the same from Stationary unitin the form of packet as
described in Annexure-II with bit details as in Annexure-VII.
6.45. When Loco passes over the RFID tag provided at the Block Entry, it shall
transmit the packet as described in Annexure-II with bit details as in Annexure-
VII.
6.46. When Loco passes over the RFID tag provided at the Station Entry &then
travels equal to its train length, it shall transmit the packet as described in
Annexure-II with bit details as in Annexure-VII.
Connectivity of Station/ IBS/ Gate unit with interlocking
6.47. Station/ IBS/ Gate unit shall be capable of taking potential free inputs. It shall
be capable of taking minimum 64inputs (expandable upto 256inputseither by
providing additional I/O cards or by cascading multiple Station/ IBS/ Gate unit).
6.48. The break status of potential free contact shall indicate absence input.
6.49. Signal aspect, point position of points taking off from main line, berthing track
circuit status, status of block instrument Line Closed condition etc. shall be
interfaced to Station/ IBS/ Gate unit input through potential free contacts,
depending upon requirement. The point position of points shall be interfaced to
station unit in the form of only two inputs for each main line of the station as
shown in the diagram below and depending upon the status of these two
inputs, station unit shall decide whether the line is set for main line or not.
A
B
Station TCAS
NWKR of all points taking off from
main line
RWKR of all
points taking
off from the
same main
line
Status of Decision of Station unit
A B
1 0 Main line set
0 1 Main line not set
0 0 No status available
1 1 Conflicting Status
Similar to as shown above, there shall be inputs like A & B for each main line of
the station
6.50. IBS & Gate unit shall not require inputs for point position & berthing track circuit
status. Gate unit shall not require input for status of block instrument Line
Closed condition.
Signal Directorate RDSO/Lucknow Page 29 of 56