A buffer PSU intended for uninterrupted supply to devices that require stabilised voltage of 12V DC (+/-15%). The PSU provides voltage of U=13,8V DC with output current of I=9A + 1/4A for battery charging. In case of power decay, a battery back-up is activated immediately. The PSU is constructed based on the switch mode PSU, with high energy efficiency. The PSU is housed in a metal enclosure (colour RAL 9003) which can accommodate a 40Ah/12V battery. A micro switch indicates door opening (front cover). Power supply: ~200 – 240 V. Power supply output: 9A/13,8VDC. Battery charging current: 1/4Amp. Fitting battery:40Ah/12V. Efficiency: 87%. Protections: SCP, OVP, OLP, UVP, tamper (opening of the enclosure). Dimensions: 330 x 380 x 173 [+/- 2mm] distance from floor 14 mm. Notes: surface mounted enclosure, locking – bolted (lock assembly possible).