A buffer PSU module is intended for an uninterrupted supply to devices requiring stabilised voltage of 12VDC (+/-15%). The PSU module provides voltage of 13.8 VDC with current capacity. In case of power failure, a battery back-up is activated immediately. Power supply: 18V÷22VAC/50Hz/with transformers AWT8161820, AWT039, AWT800. Power supply output: 3Amp/13.8VDC. Battery charging current: 0.5Amp/1Amp. Efficiency: 81%. Protections: short-circuit, overload, overheat, over voltage. Technical outputs OC type: EPS – AC network failure, PSU – power supply failure, LoB – low battery voltage. Dimensions: L=88, W=93, H=55 [+/- 2mm].