Installation guide

VAR4 / VAR12 / VAR20 - Product Description
2 System Overview
The VAR4, VAR12 and VAR20 are advanced DSP-based Audio Router and Voice Alarm System
Controllers. They allow connection of 4, 12 or 20 audio inputs, which can be routed to 4, 12 or 20 outputs.
Additionally they can monitor and control up to 63 Amplifier Mainframes (V400) and associated amplifier
interface card/surveillance units. Each mainframe connects to the VAR Router via an Audio-CAN
TM
serial
data network and audio monitor bus.
The digital messages may be routed flexibly under the control of the built-in Fire Panel Interface.
The VAR Router comprises a base unit and a number of expand units depending on its capacity as shown in
Figure 1:
• VAR4: VAR4 Base Unit
• VAR12: VAR4 Base Unit + Expand Unit
• VAR20: VAR4 Base Unit + 2 Expand Units
Figure 1 VAR Router Units – Rear View
VAR4
VAR12
VAR20
EXPAND UNIT-2
(INPUTS/OUTPUTS 13-20)
EXPAND UNIT-1
(INPUTS/OUTPUTS 5-12)
VAR4 BASE UNIT
(INPUTS/OUTPUTS 1-4)
The VAR4 Router includes:
• Digital storage for 2 x 32-second messages and 2 x 16-second messages.
• Four universal Mic/Line inputs, each of which supports a serial interface to enable an ASL multi-zone
Paging Microphone to be connected.
All-Call or Zoneable Fire Microphones may be connected to Inputs 1 and 2. These act as All-Call failsafe
override microphones in the event of processor failure as required by BS5839 Part 8.
• Four A&B audio outputs.
• Two connections for background music sources, either of which can be selected for routing.
• Built-in fire alarm interface:
− 10 non-isolated analogue interfaces.
− 12 opto-isolated interfaces.
Issue: 03 complete, approved
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