Recommended for use with the most voltage sensitive electronic safety and security components including card readers, electric strikes, motion sensors and DC voltage cameras. Also recommended where an interface with a fire alarm system or battery backup is needed. The BPS-12/24-1 is UL Class 2 listed, allowing for wire runs without the use of conduit from power supply to door. Dual output, field selectable 12/24 VDC via clearly marked toggle switch. Supplies 1 full AMP continuous current output, even while charging back-up batteries. SPDT AC monitoring output allows for remote monitoring of the power supply's 110 VAC input. Separate voltage inputs for load and battery allow the batteries to charge at a higher output while the load remains at exactly 12/24 VDC. LED indication (AC and DC) showing power supply status. UL Listed low current fire alarm disconnect requires only a minimum size fire alarm relay and wire gauge. Polyswitch 2 A breaker allows for large short duration inrush current if batteries are installed (approximately 20 A for 1 second). Line voltage and DC fuses. Sealed lead acid-gel battery charging capability (battery not included).