APC Battery Management System manual Alarm Relay and LED Operation

Battery Management System

USER’S GUIDE

®

Alarm Relay and LED Operation

Situation/Condition	Alarm Relay	Status LEDs
NOTE: Alarm Relay	Normally Open	Management	Batteries	Charger	Environment
operates as a “Fail-	Contacts (de-	Controller
Safe” device that is	energized)
energized during
non-alarmed periods.
Normal Operations	Closed	On	On	On	On
	(energized)
Management System	Open	Flash	On	On	On
Fault	(de-energized)
High or low	Open	On	On	On	Flash
environment	(de-energized)
temperature or
auxiliary environment
sensor alarm
Charger Fault - High	Open	On	On	Flash	On
or low charging
voltage or high ripple
current
Connection fuse or	Open	Flash	On	On	On
wiring fault
Battery Fault - Low	Open	On	Flash	On	On
capacity, high ohmic
value, shorted cell or
thermal runaway
Missing or Faulty	Open	Flash	On	On	On
Sensor
System off or loss of	Open	Off	Off	Off	Off
input power

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