290A3828-06
"SPK" SPEAKER
(WHT/BRN)
"SPK" SPEAKER
(WHT/BRN)
"COM"
COMMON
(WHT)
"COM"
COMMON
(WHT)
"PWR
+
" (BLK)
*
SEE POWER
CONNECTIONS
*
"EGND" (GRN/YEL)
"PWR
-
" (WHT)
"PWR
+
" (BLK)
*
"EGND" (GRN/YEL)
"PWR
-
" (WHT)
3
3
4
4
2
1
BLK
WHT
BLK
WHT
"AUD" AUDIO
"COM" COMMON
LOCAL SPEAKER/MICROPHONE
MODEL AD-SF-25
LOCAL SPEAKER/MICROPHONE
MODEL AD-SF-25
REMOTE A
PANEL MOUNTED
INTERCOM
REMOTE B
PANEL MOUNTED
INTERCOM
1K
1WATT
5
5
NOTES:
1. Mounting Holes
2. Cover Plate
3. Off/On/Speaker Volume Control
4. Talk/Listen Switch
5. Use shielded audio cable in electrically noisy
areas. Ground one end of the shield to
"earth" ground.
POWER CONNECTIONS
:
"PWR+" (Black) +DC-Power 12/24V Models
HOT 120/240V Models
"PWR-" (White) Common 12/24V Models
Neutral 120/240V Models
"EGND" Earth Ground 120/240V Models only
(Green/yellow)
POWER
MASTER
SLAVE
12-18VDC AD-26P AD-26P
120V 50/60Hz AD-27P AD-27P
22-30VDC AD-56P AD-56P
240V 50/60Hz AD-57P AD-57P
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/listen switch to listen.
-10-
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