A buffer PSU is designed for uninterrupted supply of devices requiring stabilized voltage of 12V DC (+/-15%). The PSU supplies voltage of U=13,8V DC. In case of mains power loss, the unit will instantly switch to battery operation. The PSU is enclosed in a metal casing (color RAL9003) with battery housing for 40Ah/12V batteries. The enclosure is fitted with a micro switch indicating door opening (front cover) and the detachment from the wall. Power supply: 230VAC/50Hz. Power supply output: 5A/13,8VDC. Battery charging current: 0,5A/1A/2A/3A. Fitting battery: 40Ah/12V. Efficiency: 76%. Protections: SCP, OLP, OVP, UVP, tamper (opening of the enclosure, detachment from the wall). Technical outputs OC type: EPS - 230V power failure AC, PSU - power supply failure, LoB – low battery voltage. Dimensions: W=330 H=350 D+D1=172+8 mm [+/- 2 mm]. Surface mounted enclosure, locking – bolted.