-17-
13
POWER
REMOTE
A
REMOTES B & C
REMOTE D
12VDC
AD
‑26T
AD
‑26
120V
50/60Hz
AD
‑27T
AD
‑27
AD
‑28X
‑MV
240V
50/60Hz
AD
‑57T
AD
‑57
AD
‑28X
‑MV
22
‑30VDC
AD
‑56T
AD
‑56
AD
‑28X
‑MV
POWER CONNECTIONS (Remote
A, B, & C):
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
NOTES: 1.
Desk Set speaker (microphone is mounted on handset)
2.
Desk Set speaker volume control
3.
Handset earpiece volume control (mounted on back of case)
4.
Speaker/Microphone
5.
Of
f/On/Speaker volume control
6.
Talk/Listen switch
7.
“Call” T
one
Switch
8.
3‑
conductor/16
‑22gauge cable. Use shielded cable in electrically noisy
areas. Ground one end of the shield to “earth” ground. Ground chassis of
DC unit to ground.
Operating Principle: 1.
When one intercom talks, all of the intercoms will hear
.
2.
For Remotes B, C, or D to talk
to other stations, press the talk/listen
switch and
speak into the speaker/mic
rophone. Release
talk
switch to listen.
3.
For Remote
A to talk
to other stations, press PTT
‑button on handset and talk into
handset micro
phone.
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
.
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 D
4
6
5
7
BLK
WHT
AUDIO
COMMON
BLK
WHT
REMOTE C
4
6
5
8
BLK WHT GRN
BLK
WHT
REMOTE B
4
6
5
BLK WHT GRN
290A4725-13
REMOTE A
BLK WHT GRN
*
*
*
SEE POWER CONNECTIONS
*
2
3
1
ATKINSON DYNAMICS
UNIVERSITY
P
ARK, IL
USA
A FEDERAL
SIGNAL
COMP
ANY
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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