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
Annexure-X (Page 2 of 3)
Indian Railways Driver Machine Interface (IRDMI) GUIDELINES
1. The IRDMI shall have LCD for display & soft-keys for operation. There shall be
minimum 22 soft keys (20 in use & 2 as spare for future requirements).
2. The software of IRDMI shall be verified & validated to Safety Integrity Level (SIL) -2
of CENELEC or equivalent international standards.
3. The display area shall be LCD Module having minimum 256 colours, display size of
10.4" (diagonal) and minimum 640x480 pixels. This shall be of industrial grade & as
per Clause 13.0 of RDSO specification no. RDSO/SPN/196/2012 ver – 3.1.
4. Overlay background will be black.
5. Locations for displaying various information on LCD screen have been marked on the
layout. The details are as under:
i. Location ‘A’ – Location for displaying current mode of the system.
ii. Location ‘B’ – ‘System Fail’ in red colour text shall be displayed when system is
faulty & ‘System Healthy’ in green colour text when system is healthy.
iii. Location ‘C’ – ‘RFID tag missing – One/ both’ text in flashing red for 10 seconds
shall be displayed in case of one/ both RFID tag missing/ damaged which will
become steady & will remain till it finds next RFID tag. Normally, there shall be
no display at this location.
Below this Location, the Loco TCAS unit shall also display the Success Rate of
communication packets received from Stationary TCAS unit in Numeral and
Graphical Bar form.
iv. Location ‘D’ to Location ‘L’ – The purpose of pressing the corresponding button
(above the location) shall be displayed in text in yellow colour. The purpose of
pressing of some of the buttons may change as per the context of the situation
as described below:
a. Location ‘D’ – After switching on the system, ‘Start’ shall be displayed which
will become flashing once the ‘Start’ button is pressed. Normally, there shall
be no display at this location.
b. Location ‘E’, ‘F’ & ‘G’ – For selection or toggling of various modes of Loco unit
which are authorized to be selected manually. For example, one button could
be used for ‘Reverse Mode’. The text below this button shall normally indicate
‘Select’. On pressing this button, the Loco unit mode shall change to ‘Reverse
Mode’ as per the specification, the display at Location ‘A’ shall display
‘Reverse Mode’ & the text below this button shall now change to ‘Exit’ so that
another pressing of this button shall cause exit from ‘Reverse Mode’.
c. Location ‘H’ – The ‘Brightness’ button shall be used to activate/ deactivate
brightness control of the screen. This button shall act as a toggle switch.
Depending upon the function of this button, the text ‘Brightness Mode’ or
‘Brightness exit’ in white colour shall be displayed at this location. When
brightness control is activated, ↑& ↓ buttons shall be used to control the
brightness.
d. Location ‘J’ – The ‘Restricted’ button shall act as a toggle switch to perform
shunt request/ exit functions. Depending upon the function of this button, the
text ‘Restricted Mode Request’ or ‘Restricted Mode Exit’ in yellow colour shall
be displayed at this location.
Signal Directorate RDSO/Lucknow Page 55 of 56