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TECHNOLOGIES LTD
20J CAN Combi Relay Module
Unit Switch Selection
Set up procedure:
235 W2C
D
a
t
a
S
heet
ref C1179 Issue B
To allow the CAN relay to communicate with the Combi unit it must have a unique address
between 240 and 255. This can be selected using the SW1 address switches. The selected
address will be recognised by the Combi system automatically on power up. This can be checked
in engineers menu 27 ‘Setup Network’.
The CAN relay must also be set up to copy a group of 4 relays on one of two 32 way external
relay boards. If a 32 way external relay unit is not being used the Combi system sees the 4
relays in the CAN relay as part of a virtual 32 way external board. SW2 is used to select which
group of relays the CAN relay will copy.
CAN Address on SW1
4 relays copy external 32+32 relay
PCB in groups of 4 using SW2