SFA1
Description
This simple emergency detector operates an output relay that supplies a 12V d.c. Output supply to drive a hooter when either an over-temperature or public electricity supply fails the 12 d.c. supply is provided by an internal battery that is maintained in a readiness state by the incorporated trickle charger circuit. Hooter will remain operating until mains a.c. supply returns or internal battery dischargers. A test button is provided for weekly testing the alarm system.
