Absopulse Electronics' BCH 100 is a compact DC-output UPS system that has a built-in battery-charger section to provide 100W power for the output and for float-charging the external battery. It is designed for industrial and other rugged environments. Standard single-output float-voltage options include 13.8, 27.6 and 55.2V DC. The unit operates from a 95 to 264V AC universal input. Custom input and output options are available on request. The UPS has a low-battery disconnect circuit to prevent damage to the external battery by low discharge during prolonged AC failure. The battery input is also protected against accidental reverse-battery connection by a crossbar diode and an internal safety fuse. A built-in redundancy diode prevents battery discharge back into the charger if the AC is disconnected or collapses. This unit also features a charger-fail alarm (Form A) to indicate either failure of the charger circuit or loss of AC input power. A charger LED indicator is located beside the terminal block. The system is conduction- and convection-cooled and therefore requires no fan; is rated for operation over a 0 to +50°C range without derating. An extended temperature range is available on request.