IRDASC Terminals

IRDASC-1

+To Power supply (AC or positive DC).
A To signal (green LED anode).
B To signal (red LED anode).
C Not used.
D Not used.
V0 To other terminal of Power Supply also connection to signal common and common for detection and train in section LEDs.
g REVERSE RUNNING connecting to V0 sets signal to danger and clears train in section.
h TRAIN ENTERING SECTION When this terminal is connected to V0 (via push button switch) or TRAIN DETECTED (j) of previous IRDASC or terminal 2 of an IRDOT-1 the signal will change to clear provided neither the OVERRIDE/INTERLOCK or REVERSE RUNNING terminal is activated.
i OVERRIDE/INTERLOCK whilst connected to V0 signal sets to danger. This does not clear Train in Section.
j TRAIN DETECTED this connects to TRAIN ENTERING SECTION of next IRDASC up the line to tell it a train is approaching.
k TRAIN IN SECTION this can be wired to OVERRIDE/INTERLOCK of previous IRDASC so that it keeps its signal at danger whilst the next section is occupied.
l TRAIN IN SECTION LED connects to LED (long leg / anode).
m TRAIN DETECTED LED connects to LED (long leg / anode).

IRDASC-2

+To Power supply (AC or positive DC).
A Contact for green signal lamp.
B Contact for red signal lamp.
C Not used.
D Contact: for power to signals.
V0 To other terminal of Power Supply also connection to signal common and common for detection and train in section LEDs.
g REVERSE RUNNING connecting to V0 sets signal to danger and clears train in section
h TRAIN ENTERING SECTION When this terminal is connected to V0 (via push button switch) or TRAIN DETECTED (j) of previous IRDASC or terminal 2 of an IRDOT-1 the signal will change to clear provided neither the OVERRIDE/INTERLOCK or REVERSE RUNNING terminal is activated.
i OVERRIDE/INTERLOCK whilst connected to V0 signal sets to danger. This does not clear Train in Section
j TRAIN DETECTED this connects to TRAIN ENTERING SECTION of next IRDASC up the line to tell it a train is approaching.
k TRAIN IN SECTION this can be wired to OVERRIDE/INTERLOCK of previous IRDASC so that it keeps its signal at danger whilst the next section is occupied.
l TRAIN IN SECTION LED connects to LED (long leg / anode).
m TRAIN DETECTED LED connects to LED (long leg / anode)

IRDASC-DSS

+To Power supply (AC or positive DC)
A Yellow signal wire
B Not used
C Not used
D Yellow signal wire
V0 To other terminal of Power Supply also connection to
signal common and common for detection and train in section LEDs
g REVERSE RUNNING connecting to V0 sets signal to danger and clears train in section
h TRAIN ENTERING SECTION When this terminal is connected to V0 (via push button switch) or TRAIN DETECTED (j) of previous IRDASC or terminal 2 of an IRDOT-1 the signal will change to clear provided neither the OVERRIDE/INTERLOCK or REVERSE RUNNING terminal is activated
i OVERRIDE/INTERLOCK whilst connected to V0 signal sets to danger.This does not clear Train in Section
j TRAIN DETECTED this connects to TRAIN ENTERING SECTION of next IRDASC up the line to tell it a train is approaching.
k TRAIN IN SECTION this can be wired to OVERRIDE/INTERLOCK of previous IRDASC so that it keeps its signal at danger whilst the next section is occupied.

l  TRAIN IN SECTION LED connects to LED (long leg / anode)
m TRAIN DETECTED LED connects to LED (long leg / anode).

IRDASC-3

+To Power supply (AC or positive DC).
A Relay contact: track isolation common.
B Relay contact: signal power.
C Not used
D Relay contact: to signal green.
V0 To other terminal of Power Supply also connection to signal common and common for detection and train in section LEDs.
g REVERSE RUNNING connecting to V0 sets signal to danger and clears train in section
h TRAIN ENTERING SECTION When this terminal is connected to V0 (via push button switch) or TRAIN DETECTED (j) of previous IRDASC or terminal 2 of an IRDOT-1 the signal will change to clear provided neither the OVERRIDE/INTERLOCK or REVERSE RUNNING terminal is activated
i OVERRIDE/INTERLOCK whilst connected to V0 signal sets to danger. This does not clear Train in Section.
j TRAIN DETECTED this connects to TRAIN ENTERING SECTION of next IRDASC up the line to tell it a train is approaching.
k TRAIN IN SECTION this can be wired to OVERRIDE/INTERLOCK of previous IRDASCso that it keeps its signal at danger whilst the next section is occupied.
l TRAIN IN SECTION LED connects to LED (long leg / anode).
m TRAIN DETECTED LED connects to LED (long leg / anode).