Product DescriptionThe Altronix AL400ULXB2 power supply and charger board converts a standard 115 VAC 60 Hz input into a selectable 12 VDC or 24 VDC Class 2 rated regulated output, delivering up to 4 A at 12 V or 3 A at 24 V. It features built in battery charging for sealed lead acid or gel cells, automatic standby battery switch over with zero voltage drop, and supervised form “C” contacts for AC failure, low battery and battery presence. The unit includes LED indicators for AC input, DC output and battery status, and offers filtered and regulated output with short circuit and thermal overload protection. The compact board measures approximately 7.1″ × 4.5″ × 1.44″ and weighs about 0.65 lb, making it suitable for integration in security, access control or fire alarm systems. It is UL listed for multiple signaling standards and designed for reliable professional use in demanding installations.