This modular 19-inch rack mount AC/DC power supply can provide up-to 50 Amps continuous power. The output DC voltage is highly regulated at 27.6 Volts (120 Volts AC input). 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.