Atkinson Dynamics AD-28X-MV, Installation Instructions Manual

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-16-
12
Reminders: •
Before installing remote intercoms, precautions should be taken to prevent feedback between two or more remotes in close proxim
‑
ity and acoustically reflective areas.
•
Audio and power cables are not supplied with
AD
‑28X
‑MV
.
•
In this installation the Masters are constantly broadcasting audio from the Slave. Pushing the listen/talk switch on any unit forces the Slave into the listen mode and the Master into the talk mode.
The MAS/SLA
jumper J2, located on the P
.C. Board inside the
Slave, must be placed in the SLA
mode for this operation See SLA
VE MODE on page 2 and figures 2 and 6.
Operating Principle: •
Masters normally listen to slave.
•
Slave talks to master hands
‑free, without having to
press a talk switch.
•
When any master talks, slave hears. Other masters will hear
.
•
To talk into master
, press talk switch and speak into
speaker/microphone. Release talk switch to listen.
NOTES: 1.
Speaker/Microphone
2.
Of
f/On/Speaker volume control
3.
Press
‑to
‑talk Switch
4.
“Call” T
one
Switch
5.
Desk Set speaker (microphone is mounted on hand
‑
set)
6.
Desk Set speaker volume control
7.
Handset earpiece volume control (mounted on back of case)
Power
Master
A
Master
B
Slave
12–18VDC
AD
‑26CT
AD
‑26C
‑‑
120V
50/60Hz
AD
‑27CT
AD
‑27C
AD
‑28X
‑MV
22
‑30VDC
‑‑
AD
‑56C
AD
‑28X
‑MV
240V
50/60Hz
‑‑
AD
‑57C
AD
‑28X
‑MV
POWER CONNECTIONS (MASTER
A & 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
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
SLA
VE
1 3
2 4
GRN 1 WHT
2
BLK 3
AUDIO COMMON CONTROL
GRN WHT BLK
GRN 1 WHT
2
BLK 3
MASTER B
1 3
2
BLK WHT GRN
290A4725-12
1K 1 W
ATT
MASTER DESK SET
A
BLK WHT GRN
*
6
7
5
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