Installation Guide

- 6 - Maximal Expandable Power Systems
+ DC ---
SW1
OFF - 24V
ON - 12V
ON
Fig. 1a
AL400ULXB2 / AL600ULXB Power Supply Board
Fig. 1b
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.
Red (Bat) Battery Status
ON Normal operating condition.
OFF Battery fail/low battery.
Power Supply Board Output Voltage Settings:
Fig. 1Fig. 1
ON
OFF - 24V
ON - 12V