Network Interface - ASL INTERCOM VAR8-ACU Product Description

8.1

Network Interface

Upstream and Downstream
•
9 way terminal block (3.8 mm).
•
Upstream and Downstream network interface
connections, comprising a RS485 control bus
and a 3-channel audio bus.
The Audio Bus connections are outputs at the
ACU Audio Control Unit and inputs at the
Slave Units.
Signal
SCRN
DXP
DXN
BUS1+
BUS1−
BUS2+
BUS2−
BUS3+
BUS3−
Signal
GND
DXP
DXN
BUS1+
BUS1−
BUS2+
BUS2−
BUS3+
BUS3−
VAR8-ACU and Variants - Product Description
Downstream
For cable screen connection
Data Bus+ (EIA RS485 38400 baud)
Data Bus− (EIA RS485 38400 baud)
Audio bus Loop 1 (+20 dBu Analogue audio)
Audio bus Loop 1
Audio bus Loop 2 (+20 dBu Analogue audio)
Audio bus Loop 2
Audio bus Loop 3 (+20 dBu Analogue audio)
Audio bus Loop 3
Upstream
For cable screen connection
Data Bus+ (EIA RS485 38400 baud)
Data Bus− (EIA RS485 38400 baud)
Audio bus Loop 1 (+20 dBu Analogue audio)
Audio bus Loop 1
Audio bus Loop 2 (+20 dBu Analogue audio)
Audio bus Loop 2
Audio bus Loop 3 (+20 dBu Analogue audio)
Audio bus Loop 3
Issue: 02 complete, approved
UPSTREAM
Description
Description
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Network Interface
DOWNSTREAM