Tocsin 920 Addressable Relay Card
Highways Connection
Pin 1 0V DC
Pin 2 Comm A
Pin 3 Comm B
Pin 4 24 V DC
Pin 1 0V DC
Pin 2 Comm A
Pin 3 Comm B
Pin 4 24 V DC
Highways Connection
Normally Closed
Common
Normally Open
Relay Terminals
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).
From the controller software, the first relay on a card
can be designated as a 'Fault' indication relay. If this
is the case this LED will be lit and the relay action is
reversed, that is it is normally energised and will de-
energise on power failure or any system fault that is
detected. Note also that the relay state LED is RED
if it is NOT designated as a FAULT relay and
YELLOW if it is designated as a FAULT relay
Note relay status LED's colour for
first relay are different if it is
designated as a fault relay in Tocsin
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
OLIVER
IGD
9
