
9
290A4065
BLK
WHT
BLK
GRN
RED
WHT
1K
1WATT
AUDIO
COMMON
REMOTE A REMOTE B
1
3
2
BLK
WHT
GRN
*
SEE POWER
CONNECTIONS
TO OTHER
INTERCOMS
*
1
3
4
2
BLK
WHT
GRN
*
Operating Principle:
• When one talks, all intercoms will hear.
• To talk to other stations, press the talk/listen switch and speak
into the speaker/microphone. Release talk switch to listen.
• To use external talk switch, close switch and speak into the
speaker/microphone.
NOTES:
1. Speaker/Microphone
2. Off/On/Speaker Volume Control
3. Talk/Listen Switch
4. Customer-Supplied External Normally-Open Talk/Listen
Switch, Momentary (e.g., foot switch)
Power
Remote A
Remote B
12-18VDC AD-26 AD-26-2
120V 50/60Hz AD-27 AD-27-2
22-30VDC AD-56 AD-56-2
240V 50/60Hz AD-57 AD-57-2
POWER CONNECTIONS:
BLK +DC Power 12/24V Models
HOT 120/240V Models
WHT Common 12/24V Models
Neutral 120/240V Models
GRN Earth Ground 120/240V Models only
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