-12-
8
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.
•
Audio and power cables are not supplied with
AD
‑28X
‑MV
.
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.
Of
f/On/Speaker V
olume
Control
3.
Talk/Listen Switch
4.
“Call” T
one
Switch
Power
Remote A
Remote B
12
‑18VDC
‑‑
AD
‑26A
120V
50/60Hz
AD
‑28X
‑MV
AD
‑27A
22
‑30VDC
AD
‑28X
‑MV
AD
‑56A
240V
50/60Hz
AD
‑28X
‑MV
AD
‑57A
POWER CONNECTIONS (Remote B):
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
290A4725-08
10
9
8
7
6
5
4
3
2
1
DR
Y CONT
ACT
FOR CALL
AUDIO (-)
AUDIO (+)
REMOTE
GROUND (-)
24VDC (+)
NEUTRAL
HOT
EAR
TH GROUND
AC
REMOTE A
1
3
2
4
BLK
WHT
BLK
WHT
AUDIO LINE
TO OTHER INTERCOMS
1K
1W
ATT
REMOTE B
1
3
2
4
BLK WHT GRN
*
SEE POWER CONNECTIONS
*
ATKINSON DYNAMICS
UNIVERSITY
P
ARK, IL
USA
A FEDERAL
SIGNAL
COMP
ANY
ATKINSON DYNAMICS
UNIVERSITY
P
ARK, IL
USA
A FEDERAL
SIGNAL
COMP
ANY
Summary of Contents for AD-28X-MV
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