This modular 19” rack mount AC/DC power supply can provide up-to 40 Amps continuous power. The output DC voltage is highly regulated at 13.8 Volts (105-125 Volts, 50 Hz AC input). Output power can be expanded in steps of 20 amps (up-to 100 Amps max.). An external battery can be connected for back-up and a section of the output current (up-to 8 amps) is diverted to charge the batteries when in state of discharge using the in-built battery back-up module. The battery supplies the DC load on loss of utility power. Features include N+1 redundancy, front panel analog Volt/Ampere Meter display, remote monitoring and indication by 25-pin D-sub connector, fan failure warning and alarm indication. Ideal for critical power supply applications, telecommunication systems, mobile sound/audio displays, GPS receivers, security systems, CCTV systems.