
GRN
RED
WHT
BLK
GRN 1
RED 3
WHT 4
BLK 2
GRN 1
RED 3
WHT 4
BLK 2
AUDIO
+ DC POWER
COMMON
CONTROL
290A3744
MASTER "A" MASTER "B" SLAVE
1
3
4
5
2
1
1
3
2
2
POWER
(+)
(
-
)
1K
1WATT
Operating Principle:
1. Masters normally listen to
slave.
2. Slave talks to masters
“hands-free”, without having to
press a talk switch.
3. When any master talks, slave
hears. Other master will hear.
4. To talk into master, press talk
switch and speak into speaker/
microphone. Release talk
switch to listen.
5. To talk into hand-held
microphone, press talk switch
on microphone and speak into
microphone element.
NOTES:
1. Speaker/Microphone
2. Off/On/Speaker Volume
Control
3. Press-to-Talk Switch
4. #137144 Hand-held, noise-
cancelling microphone with
push-to-talk switch
POWER
MASTER A
MASTER B
SLA
VE
12-18VDC AD-26C-1-7 AD-26C-1 AD-26D-1
22-32VDC AD-56C-1-7 AD-56C-1 AD56D-1
8
-14-
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