Altronix power supply/charger converts a 115V AC 60Hz input, to a 12V DC or 24V DC at 1 amp of total supply current Class 2 Rated power limited output. Input: Input 115V AC, 50/60Hz, 0.6 amp; access control trigger input. Output: 12V DC or 24V DC selectable outputs. 1 amp supply current. Two (2) Class 2 Rated power limited outputs. Fail-Safe/Fail-Secure lock output (switched). Auxiliary power output (unswitched). PTC protected outputs, rated at 2.5 amp. Filtered and electronically regulated output. Short circuit and thermal overload protection. Built-in charger for sealed lead acid or gel type batteries. Automatic switch over to stand-by battery when AC fails. Maximum charge current 0.4 amp. AC fail supervision (form "C" contacts). Supervised fire alarm disconnect (latching with reset or non-latching). AC power and unit status indicator on the front panel. Operating temperature: 0 to 49 degree C ambient. 6.14 or 12.28 BTU/Hr. System AC input VA requirement: 55.2VA. Lifetime warranty. Wall mount enclosure for indoor use. Accommodates up to two (2) 12VDC/7AH batteries. Measures 7-1/2-inches width by 8-1/2-inches height by 3-1/2-inches depth. 1/2-inches and 3/4-inches combination knockouts. UL listed, CUL Listed - CSA Standard C22.2 No. 205-M1983, Signal Equipment, MEA - NYC Department of Buildings Approved, NFPA 101 (Life Safety).