
14
-20-
Operating Principle:
• Master presses talk switch to talk to remote.
• Master can turn monitor switch on and hear
everything going on at remote.
• When master monitor switch is off, remote must
press talk switch to talk to master.
• When master monitor switch is on, remote can talk
to master hands-free without pressing the talk
switch.
• Master supplies power to remote unit.
NOTES:
1. Speaker/Microphone
2. Off/On/Speaker Volume Control
3. Press-To-Talk Switch
4. Master Monitor Switch
Power
Master
Remote
Not applicable AD-26-1-2
120V 50/60Hz AD-27C-1-M22
POWER CONNECTIONS:
BLK HOT 120/240V Models
WHT Neutral 120/240V Models
GRN Earth Ground 120/240V Models
GRN
BLK
WHT
GRN
BLK
WHT
AUDIO
COMMON
CONTROL
RED RED
(+) POWER
290A4070
MASTER REMOTE
1
3
2
4
1
3
2
1K
1
WATT
SEE POWER
CONNECTIONS
BLK
WHT
GRN
*
*
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