Bus Termination - AUDAC APM Bedienungsanleitung

1) Only one APM on one databus
When only one APM is used on the databus, the databus needs to be terminated by the ter-
mination jumper J5 which is placed inside the APM. This jumper is placed in it's standard
configuration, so no changes need to be made when using only one APM on a databus.
2) Multiple APM's on one databus
When multiple APM's are used on one databus, the termination jumpers J5 inside the APM's
should be removed. The bus should be terminated by means of the termination jumpers on the
last ARJ03P junction box in the bus structure. Both the audio and communication lines need to be
terminated by means of the jumpers.
Analogue / Digital Paging Selection
Digital Paging
(Matrix System)
J1
Placed
J2 Placed
J3 Open
J4 Open
Analogue Paging
(ARU Relay Unit)
Open
Open
Placed
(Standard)
Placed
(Standard)

Bus Termination

One APM
J5
Placed
(Standard)
(APM)
Audio
n/a
(ARJ03P)
Com
n/a
(ARJ03P)
Multiple APM's
Open
Position 1
(Only last one in Chain)
Position 1
(Only last one in Chain)
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