Programmable interruption free power supply has battery back up with automatic switching

摘要

The supply has a microprocessor [202] that controls a charger circuit [208] coupled to a battery [207] coupled to a DC to AC converter [206] the output of which is fed to a main switch [209]. Output power switches [210] direct power to the system stages. This changes over the supply to the battery in the event of a mains failure. A communication interface [201] is linked to a computer,PDA or other process plant [11].