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990-4049
Installation Guide APC Silcon 240-320kW 480V UPS 31
4.4 Relay Board
Relays
All relays are “fail safe”: In alarm modes, relay coil will be de-energized.
Relay shown in alarm position
4.4.1 Relay Board Functions
NOTICE!
If “communication to controller lost” alarm is active, ALL relays will indicate failure.
Relay Number Message Alarm Trigging Events
1 ##
(X002)
Utility Outside
Tolerance
Utility voltage RMS value outside tolerance
Utility wave form (fast detector) outside tolerance
Utility frequency outside limits
Maximum load: 8.0A – 250VAC
0.3A – 60VDC
Minimum load: 0.05A – 6VAC
0.05A – 6VDC
1
2
3