应急灯和报警电路

This cIRcuit is permanently plugged into a mains socket and NI-CD batteries are trickle-charged. When a power outage occurs, the lamp automaTIcally illuminates. Instead of illuminaTIng a lamp, an alarm sounder can be chosen. When power supply is restored, the lamp or the alarm is switched-off. A switch provides a "latch-up" funcTIon, in order to extend lamp or alarm operaTIon even when power is restored.