VAR8 and Variants - Product Description
Issue: 02 complete, approved
Page 42 of 54
Inputs 7 to 8
• 7 way terminal block (5 mm).
• Can be used for Paging Microphone, Single Button Microphone, or
Miscellaneous Input.
DXP
DXN
V+NB
V+
0V
IN-
IN+
VAR8
Signal Description
DXP
Microphone Data+ (EIA RS485 19200 baud)
DXN
Microphone Data− (EIA RS485 19200 baud)
0V
0 V supply
IN+
Balanced audio input +VE
Level: 0 dBu Max. Sensitivity: −20 dBu Input Impedance: 10 kΩ
IN−
As above but −VE connection
V+
+V supply (18-36 V)
V+NB
Unused
Music Input
• 2 way terminal block (5 mm).
• Mono audio input, typically for background music routing. Can also
be used for a Miscellaneous Input.
IN+
GND
VAR8
Signal Description
GND Ground
IN+ Unbalanced audio input. Suitable for 1 V to 2 V RMS sources.
Input impedance: 5 kΩ
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