Audio Routing
VAR4
Universal Mic / Line audio inputs with serial control, surveillance tone, and phantom power ………… 4
Audio outputs with surveillance tone ………………………………….4 (Separate A and B outputs for each)
Built In DVA Storage ……………………………………………………………. 4 (2 x 66 second & 2 x 50 second)
VAR12
Universal Mic / Line audio inputs with serial control, surveillance tone, and phantom power ……….12
Audio outputs with surveillance tone ………………………………..12 (Separate A and B outputs for each)
Built In DVA Storage ……………………………………………………………. 8 (4 x 66 second & 4 x 50 second)
VAR20
Universal Mic / Line audio inputs with serial control, surveillance tone, and phantom power ……….20
Audio outputs with surveillance tone ………………………………..20 (Separate A and B outputs for each)
Built In DVA Storage ………………………………………………………….. 12 (6 x 66 second & 6 x 50 second)
All Variants
Hardware Bypass Fire Microphone Inputs …………………………… 2 (Universal Mic / Line Inputs 1 & 2)
Background Music Line audio inputs ……………………………………… 2 * Stereo Pairs (Internally Mixed)
Mixed Listen In monitoring audio output ………………………………………………………………………………… 1

General
VAR4
Analogue Input Interfaces …………………………………………………………………………………………………..10
Opto-Isolated Digital Control / Fault / Routing / Fire Alarm Panel Input Interfaces ………………………12
Remote I/O Expander Unit (BMB01) Interfaces ………………………………………………………………………. 3
VAR12
Analogue Input Interfaces …………………………………………………………………………………………………..10
Opto-Isolated Digital Control / Fault / Routing / Fire Alarm Panel Input Interfaces ………………………32
Remote I/O Expander Unit (BMB01) Interfaces ………………………………………………………………………. 6
VAR20
Analogue Input Interfaces …………………………………………………………………………………………………..10
Opto-Isolated Digital Control / Fault / Routing / Fire Alarm Panel Input Interfaces ………………………52
Remote I/O Expander Unit (BMB01) Interfaces ………………………………………………………………………. 9
All Variants
Control / Fault Reporting Display and Button Interface ……………………………………….. On Front Panel
Fault Log ……………………………………………………………………………………………………………. 200 Events
Real Time Clock ……………………………………………………………….. Built In (Externally Synchronisable)
Remote Diagnostics / Control / PC/DVA Interface …………………………………………………….. 1 (RS232)
Auxiliary DC supply for external equipment …………………………………………… 18 − 36V DC @ 100mA
Change Over Fault Relays ………………………………………………………………………….. 2 (One monitored)

Current Consumption
VAR4
Backlight on and sounder on …………………………………………………………….. 400mA @ 24V DC supply
Backlight off and sounder off …………………………………………………………….. 350mA @ 24V DC supply
VAR12
Backlight on and sounder on ………………………………………………………………… 1.1A @ 24V DC supply
Backlight off and sounder off …………………………………………………………………… 1A @ 24V DC supply
VAR20
Backlight on and sounder on ………………………………………………………………… 1.6A @ 24V DC supply
Backlight off and sounder off ………………………………………………………………… 1.5A @ 24V DC supply

Audio Signal Processing
Input
Graphic Equalisation …………………………………………………………………………………. 3 band plus LF Cut
Input overload margin ……………………………………………………………………………………………………. 40dB
Input attenuator range ………………………………………………………………………………………. 0dB to – 63dB
Phantom power ……………………………………………………………………………………………………….≥12V DC
Chime Generation ……………………………………………………………………………….None / 1 / 2 / 3 Chimes
Output
Graphic Equalisation ………………………………………………………………………………………………….. 8 band
Level and impedance …………………………………………………………………………………… 0dBu @ Z=660Ω
Hard limiter threshold ……………………………………………………………………………………………….. +2.5dBu
Induction loop ………………………………………………………………….. 2-6 channels compression, gain, EQ
General
Gain control ……………………………………………………………….. Input / Output / External Volume Control
Ambient Noise Sensing …………………………………………………….. Programmable Output Level Control
Night volume control ………………………………………….. 7 day scheduler function / Output Level Control
Gain control range …………………………………………………………………………………………….. 0dB to −63dB
THD input to output …………………………………………………………………………………………. <0.1% @1kHz
Crosstalk ………………………………………………………………………………………………………… >70dB @1kHz
Residual noise …………………………………………………………………………………………………….. <78dBu (A)
S/N line ………………………………………………………………………………………………………………… >70dB (A)
S/N mic ………………………………………………………………………………………………………………… >60dB (A)
Frequency response (input to output) ……………………………………………………… 100Hz to 20kHz −3dB

Dimensions and Weight
VAR4
Dimensions (H x W x D) ………………………………………… 44mm x 436mm x 222mm (excl. connectors)
Weight ………………………………………………………………………………………………………………………….2.2kg
VAR12 and VAR20
Dimensions (H x W x D) ………………………………………. 133mm x 436mm x 222mm (excl. connectors)
Weight ………………………………………………………………………………………………………………………….6.0kg
Environmental
Temperature (storage and operating) ………………………………………………………………… −5°C to +50°C
Humidity range…………………………………………………………………………….. 0% to 93% Non-condensing
PRODUCT PART NUMBERS
VAR4 (EN54) ………………………………………………………………. 4 * 4 DSP Audio Router (EN54 Version)
VAR12 (EN54) ………………………………………………………….12 * 12 DSP Audio Router (EN54 Version)
VAR20 (EN54) ………………………………………………………….20 * 20 DSP Audio Router (EN54 Version)
VAR4 ……………………………………………………………………… 4 * 4 DSP Audio Router (Original Version)
VAR12 ………………………………………………………………… 12 * 12 DSP Audio Router (Original Version)
VAR20 ………………………………………………………………… 20 * 20 DSP Audio Router (Original Version)