
-11-
Figure 5.
290A3080B
24 VDC
GROUND
REMOTE
AUDIO +
AUDIO
-
DRY CONTACT
DRY CONTACT
24 VDC
GROUND
REMOTE
AUDIO +
AUDIO
-
DRY CONTACT
DRY CONTACT
NEUTRAL
HOT
EARTH GND.
NEUTRAL
HOT
EARTH GND.
INTERCOM I
AD-28LD-MV MASTER
J7
J2 J2
J7
INTERCOM II
AD-28LD-MV SLAVE
MASTER/SLAVE INSTALLATION
1K
1 WATT
7
6
5
4
3
2
1
3
2
1
3
2
1
7
6
5
4
3
2
1
AC
AC
Master Slave Installation
Inthisinstallation,theMasterisconstantlybroadcastingaudiofromthe
Slave.Pushingthelisten/talkswitchoneitherunitforcestheSlaveinto
thelistenmodeandtheMasterintothetalkmode.TheMAS/SLAjumper
mustbeplacedintheSLAmodeforthisoperationontheslaveunit.
Using Foot Switches
Usingnormallyopen,simplecontactclosurefootswitches(customer
supplied)allowsfortotalhandsfreeoperationofthelisten/talkfunctions.
Figure 6.
290A3081B
24 VDC
GROUND
REMOTE
AUDIO +
AUDIO
-
DRY CONTACT
DRY CONTACT
24 VDC
GROUND
REMOTE
AUDIO +
AUDIO
-
DRY CONTACT
DRY CONTACT
NEUTRAL
HOT
EARTH GND.
NEUTRAL
HOT
EARTH GND.
INTERCOM I
AD-28LD-MV MASTER
J7
J2 J2
J7
INTERCOM II
AD-28LD-MV SLAVE
USING FOOT SWITCHES
1K
1 WATT
7
6
5
4
3
2
1
3
2
1
3
2
1
7
6
5
4
3
2
1
AC
AC
FOOT SWITCH
N.O.
FOOT SWITCH
N.O.
G. WIRING DIAGRAMS.
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