16
-22-
GRN
RED
WHT
BLK
GRN
RED
WHT
BLK
GRN
RED
WHT
BLK
AUDIO
+ DC POWER
COMMON
CONTROL
290A4072
MASTER "A" SLAVE MASTER "B"
3
3
2
4
8
4
1
7
7
2
2
1
1
DC POWER
(+)
(
-
)
1K
1WATT
5
6
4
RED
BLK
GRN
WHT
SPKR HEADSET SPKR HEADSET SPKR HEADSET
Operating Principle:
• Masters normally listen (monitor) slave.
• Slave can talk to master hands-free without
having to press a talk switch.
• When one station talks, other stations will
hear.
• To talk to other stations, master must press a
talk switch on intercom or on belt switch.
• Master and slave can select to talk/listen on
either the speaker/microphone or headset via
selector switch.
NO
TES:
1. Speaker/Microphone
2. Off/On/Speaker Volume Control
3. Press-To-Talk Switch
4. Headset/Speaker Selector Switch
5. #137145 Headset w/noise-canceling
microphone
6. #137146 Belt switch w/15 ft. cord
7. Receptacle for headset
8. 12 ft. cord for remote customer-supplied
headset receptacle
P
o
wer
Master A
Master B
Sla
v
e
12-18VDC AD-26C-1-M80 AD-26C-1-M34 AD-26D-1-M34
PO
WER CONNECTIONS:
RED +DC Power 12/24V Models
WHT Common 12/24V Models
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