Installation Instructions User guide

- 6 - Maximal Expandable Power Systems
NO NC C NO
+ BAT ---
24V - OPEN
12V - CLOSED
AC FAIL
RL3
SW1
AC Delay
BAT FAIL
NC C NO NC C NO
+ BAT ---
DC
AC FAIL
AC
24V - OPEN
12V - CLOSED
SW1
Fig. 1a
AL400ULXB Power Supply Board
Fig. 1c
AL600ULXB Power Supply Board
Fig. 1b
OPEN SWITCH
CLOSED SWITCH
Switch Detail
Power Supply Board LED Diagnostics:
LED
Power Supply Status
Red (DC) Green (AC)
ON ON
Normal operating condition.
ON OFF
Loss of AC, Stand-by battery supplying power
OFF ON
No DC output. Short circuit or thermal overload condition.
OFF OFF
No DC output. Loss of AC. Discharged battery
Power Supply Board Output Voltage Settings:
Fig. 1Fig. 1