Altronix AL400ULB Power Supply Board, 12VDC @ 4A or 24VDC @ 3A

The Altronix AL400ULB is a UL Recognized power supply and charger board designed for access control, burglar alarm, and fire protective signaling applications. It converts a 28VAC input into a selectable 12VDC or 24VDC Class 2, power-limited output, providing up to 4A at 12VDC or 3A at 24VDC. The board features filtered and electronically regulated output, short circuit and thermal overload protection, and a built-in charger for sealed lead acid or gel batteries. It also provides automatic standby battery switchover during AC failure, AC fail and low battery supervision, plus LED indicators for input and DC output status.