Vigilant BOWS Installation & Operation Manual
Document: LT0554
Page
6 September 2012
Issue 1.20
4-4
The BOWS has an Alarm input (ALM-) which is used to put the BOWS
into alarm, activating the Alert/Evacuate tones (when the Evacuation
Control switch is in the AUTO position). This signal is normally open
circuit or has a 10k EOL to 0V fitted if the Alarm input supervision is
configured (refer T-GEN 50 Configuration switch settings). Pulling the
ALM- signal to 0V (Table 10) will put the BOWS into Alarm.
Table 10. BOWS Interface J2 Pin Allocation
J2 Pin Name
Description
1
0V
Signal ground.
2
ALM-
Alarm input signal. Pulled to 0V to put the BOWS
into Alarm.
The BOWS has a common fault relay (Table 11) which is normally
energised when the BOWS is powered up and normal (not in fault). This
relay is de-energised on:
Audio Fault (e.g. 100V speaker line fault)
Power Supply Fault (e.g. battery fault)
Loss of power (mains & battery)
The Evacuation Control switch in the ISOLATE position.
Table 11. BOWS Fault Relay Connections
J2
Pin
Name Description
3
FLT-
BOWS fault output. Pulled to 0V when the BOWS fault
relay is de-energised (e.g., BOWS is in fault).
4
COM
BOWS Fault Relay Contacts (voltage free)
NO connected to COM when BOWS is not in fault
NC connected to COM when BOWS is in fault
5
NO
6
NC
Alarm
Input
BOWS
Fault
Outputs