An intermediate power supply designed for uninterrupted supply to devices that require a stabilized voltage of 12 VDC (+/- 15%). The power supply provides a voltage of U = 27.6 VDC with an output current of I = 4.5 Amp + 0.5/2 Amp for battery charging. In the event of a power failure, a backup battery is immediately activated. The unit is built on the basis of switched power supply, with high energy efficiency. The power supply is housed in a metal housing (RAL9003 color) that can accommodate 2 x 7Ah / 2 x 17Ah / 2 x 28Ah / 2 x 40Ah batteries. A microswitch indicates the opening of the door (front cover). Power supply: 176 ÷ 264VAC / 50Hz. Power supply output: 4.5A / 27.6VDC. Battery charging current: 0.5Amp. Mounting battery: Supports 2 x 7Ah / 2 x 17Ah / 2 x 28Ah / 2 x 40Ah. Efficiency: 87%. Protections: SCP, OVP, OLP, UVP, anti-sabotage (opening of the enclosure). Dimensions: 460 x 390 x 173 [+/- 2 mm]. Notes: Surface mounted box, locked - bolted (locking assembly possible).