A100K10876
Installation and Service Manual
Page 9
VPA Amplifiers
3.3.6 Optional connections
Monitor loudspeaker
Mount an 8 ohm loudspeaker rated at minimum 1.5 W close to the
amplifier to monitor entertainment and call channels.
Connect the loudspeaker wires to the MONITOR terminals marked
COM and 8
Ω
.
Adjust the volume to a desired value with the pot. next to the terminal.
Fault relay
Connect one wire from an external warning device to the FAULT RELAY
terminal marked COM.
Insert a suitable power supply between the other device wire and the
NO terminal.
The power on the DC OUT terminals may be used if the warning device
works on 24 VDC and consumes less than 800 mA.
The relay contacts can switch up to 7 A at 230 VAC or 30 VDC.
DC out
Optional equipment related to the PA amplifier may be powered from
the DC OUT terminals if the device works on 24 VDC and consumes
less than 800 mA. This output is protected by a 1 A thermistor.
Note the polarity if the device is polarity dependant.
Remote volume control
Mount an optional 22 kOhm log potentiometer in a convenient place in
order to adjust the master PA volume.
Use a shielded cable to connect the volume control to the REMOTE
terminals. The center tap on the pot is connected to the rightmost
terminal and the shield connects the cold pot tap to the left terminal.
Priority
A push-button, normally on the announcement microphone, is
connected to the PRIORITY terminals to establish a chime signal in
front of a call. The CHIME switch must be ON.
MONITOR
FAULT RELAY DC OUT REMOTE PRIORITY
CO
M
800 mA
8
Ω
8 Ohm
1 W
NC
NO
-
CO
M
24V
+
MONITOR
MONITOR
DC OUT REMOTE PRIORITY
FAULT RELAY
C
OM
800 mA
8
Ω
NC
NO
-
C
OM
24
V
+
Ext.
Power
MONITOR
REMOTE PRIORITY
FAULT RELAY
DC OUT
C
O
M
800 mA
8
Ω
NC
NO
-
C
O
M
2
4V
+
Ext. Device
+
_
MONITOR
DC OUT
PRIORITY
FAULT RELAY
REMOTE
CO
M
800 mA
8
Ω
NC
NO
-
CO
M
24V
+
22 kOhm
MONITOR
DC OUT REMOTE
FAULT RELAY
PRIORITY
CO
M
800 mA
8
Ω
NC
NO
-
CO
M
24V
+
Mic