Installation & Configuration Manual
Wiring of a branch expander
Expander connected to branch
10.3 Wiring the system ground
0V of Smart PSU's, Keypads and Expanders must be connected to the SPC
controller 0V (System GND).
10.4 Wiring the relay output
The SPC controller has one on-board 1 A single pole changeover relay that can be
assigned to any of the SPC system outputs. This relay output can switch a rated
voltage of 30 V DC (non-inductive load).
When the relay is activated the common terminal connection (COM) is switched
from the Normally Closed terminal (NC) to the Normally Open terminal (NO).
2A
2B
1A
1B
2A
2B
SHLD
4A
4B
3A
3B
1A 1B
1A 1B 2A 2B
1A
1B
4
1
2
3
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