
-7-
290A3693
BLK
WHT
BLK
WHT
AUDIO LINE
TO OTHER INTERCOMS
1K
1WATT
AUDIO CABLE
REMOTE A REMOTE B
AUDIO CABLE
1
3
2
1
3
2
4
BLK
WHT
GRN
*
SEE POWER
CONNECTIONS
*
BLK
WHT
GRN
*
Reminders:
• Before installing remote intercoms, precautions should be taken to prevent feedback
between two or more remotes in close proximity and acoustically reflective areas.
• 16–20 gauge low voltage audio cable. Twisted pair not required..
• Shielded audio cable not required unless operating in high electromagnetic fields. Ground
one end of the shield to earth ground.
• Type of power cable depends on intercom model.
• 7 foot provided for audio and power.
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.
NOTES:
1. Speaker/Microphone
2. Off/On/Speaker Volume Control
3. Talk/Listen Switch
4. “Call” Tone Switch
Power
Remote A
Remote B
12–18VDC AD-26 AD-26A
120V 50/60Hz AD-27 AD-27A
22-30VDC AD-56 AD-56A
240V 50/60Hz AD-57 AD-57A
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
1
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