SFA2
Description
Magnetically retained doors are maintained in position by 24V d.c. supply until public electricity fails or an over – temperature is detected. Immediately an emergency prevails, the output hooter relay supplies 12 and 42V d.c. to output terminals for connection to an appropriate hooter. Hooter remains operating until a.c. supply returns or internal battery discharges. The 24V internal battery is maintained in a readiness state by a trickle charger. A test button is provided for weekly testing of the alarm system.
