Audio Inputs - ASL INTERCOM VAR8 Product Description

8.2

Audio Inputs

Inputs 1 and 2
•
2x10 way double stack terminal block (5 mm).
•
Lower terminal block: Input 1.
•
Upper terminal block: Input 2.
•
Software configurable inputs with a hardware failsafe mode
for emergency operation in the event of processor failure
(BS5839 requirement).
•
Can be used for Fire Microphone, Zoned Fire Microphone,
Paging Microphone,
Miscellaneous Input.
Input 1 is not available when the VAR8 is networked.
Network Channel 1 – Input 1
Signal
DXP
DXN
0V
IN+
IN−
V+
PTT−
PTT+
ACO
SN
Inputs 3 to 6
•
2x7 way double stack terminal block (5 mm).
•
Lower terminal block: Inputs 3 and 5.
•
Upper terminal block: Inputs 4 and 6.
•
Can be used for Paging Microphone, Single Button Microphone,
or Miscellaneous Input.
When the Network Interface Card is fitted and the VAR is
networked, inputs 3 and 4 are used for network operation:
Network Channel 2 – Input 3
Network Channel 3 – Input 4
Signal
DXP
DXN
0V
IN+
IN−
V+
V+NB
VAR8 and Variants - Product Description
Single Button Microphone,
Microphone Data+ (EIA RS485 19200 baud)
Microphone Data− (EIA RS485 19200 baud)
0 V supply
Balanced audio input +VE
Max. Sensitivity: −20 dBu
Level: 0 dBu
As above but −VE connection
+V supply (18-36 V)
Press To Talk switch input (internally pulled up to +5 V by 4k7 Ω)
Press To Talk switch input (internally pulled up to +5 V by 4k7 Ω)
All Call Only LED. Open collector drive, 100 mA max
Speak Now LED. Open collector drive, 100 mA max
Microphone Data+ (EIA RS485 19200 baud)
Microphone Data− (EIA RS485 19200 baud)
0 V supply
Balanced audio input +VE
Max. Sensitivity: −20 dBu
Level: 0 dBu
As above but −VE connection
+V supply (18-36 V)
Unused
Issue: 02 complete, approved
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Description
Input Impedance: 10 kΩ
Description
Input Impedance: 10 kΩ
VAR8
VAR8