VAR4 – Installation Guide
Issue: 02 complete, approved
Page 12 of 20
AUDIO-CAN: Audio CAN Port
1
2
3
4
5
6
7
8
9
CAN_L
GND
AUDIO
MON-
AUDIO
MON+
CAN_H
Standard 9-way D connector (male)
Pin No
Signal
Description
1, 6, 8, 9
-
Not connected
2
CAN_L
Controller Area Network (Low)
3
GND
0 V Reference
4 AUDIO
MON-
5 AUDIO
MON+
Audio Monitor Bus
–10 dBu nominal
7
CAN_H
Controller Area Network (High)
INPUT 1 to INPUT 4: Balanced Audio Inputs 1 to 4
5
4
3
2
1
9
8
7
6
DATA
DXN
0V-SUPPLY
AUDIO-
AUDIO+
DATA
DXP
+SUPPLY
GND
Standard 9-way D connector (female)
Pin No
Signal
Description
1
AUDIO+
Balanced audio +
2
AUDIO-
Balanced audio -
3
0V-SUPPLY
0 V Supply
4, 8
-
Not connected
5
DATA DXN
Data- (EIA RS485 19200 baud)
6
GND
Common ground (for cable screen)
7 +SUPPLY
+V Supply
12 V DC fused at 500 mA
ASL microphones require
18-40 V DC supply and should not
be powered from this output.
9
DATA DXP
Data+ (EIA RS485 19200 baud)
MUSIC A and MUSIC B: Unbalanced Stereo Audio Inputs
SIGNAL (+)
GROUND (-)
SIGNAL (+)
GROUND (-)
L
R
Phono Plug
Pin No
Signal
Description
L
Left
Unbalanced stereo audio input
R Right
As
above
The stereo signals are mixed to mono internally.
