‘Normal’, ‘Defect’ and per circuit ‘Fire’ indication on front panel
‘Internal Bell Cut-Off’ and ‘External Bell Cut-Off’ (BCO)
Alarm reset available from a front panel key-switch
Trial Evacuation key-switch
Fire & Defect C/O relays with Fire relay Isolate switch
Automatic Alarm Verification Facility (AVF) provides substantial
protection against transient false alarm activation
Supervised bell circuit with 10 kΩ EOL resistor
Maximum of two 20 Watt 100 Vrms line amplifiers with voice
evacuation message
‘Battery Absent’ detection circuitry
Earth leakage supervision
Integrated Alarm and Defect piezo for audible warning
On-board System ‘Defect’ LED indicates source of fault
Door Interlock
Brigade ‘Isolate’ and ‘Test’ switches
Electrically isolated interface to an alarm transmitter (SGD)
DBA mode ‘Non Latching, Bell Only’ configuration available (on Circuit 4)
Automatic daily load test with automatic ‘Battery Absent’ detection circuitry