Addressable Relay Card
Pin 1 0V DC
Pin 3 Comm B
Pin 4 24 V DC
Highways Connection
Pin 2 Comm A
Pin 2 Comm A
Highways Connection
Pin 1 0V DC
Pin 3 Comm B
Pin 4 24 V DC
Common
Normally Closed
Relay Terminals
Normally Open
Relay status LED,
ON when Energised
24V DC
0V DC
Power out for
use in
conjunction
with relays
First Relay on
The Card (relays
number from
this one).
Base Address set up
LED's and interface
for the relay card
In all Cases:
Relay contact ratings.
7A @ 250V AC Non-Inductive
7A @ 30V DC Non-Inductive
Spike suppression must be fitted
Note that FAULT relays are normally
energised on power up.
0V DC
24V DC
~
~
A1
A1
A2
A2
Example fit
protection
diodes when
switching
external DC
loads.
Example fit protection
supressors when
switching external AC
loads typical device
Farnell Ref 1438460
Page 17 of 52
