Bogen VAR1 Voice Activated Relay for 70V Paging System 2 Sets of C Form

Bogen VAR1 Voice Activated Relay for 70V Paging System 2 Sets of C Form

The VAR1 is a relay device that monitors audio activity over a wide range of input voltages and operates two sets of C-Form relay contacts in response to detected activity. The VAR1 can be used to detect voltages as low as signals directly from a microphone or as high as signals from 70V speaker systems. A low-level output of the detected audio, transformer-isolated from the input, is also made available for use with other equipment. The VAR1 can also be used as a balanced, low-impedance microphone pre-amp. The VAR1 is ideally suited to provide a set of contact closures for paging ports of lower cost telephone systems that do not have a set of AUX contacts to trigger paging equipment. An adjustable release delay (up to 25 seconds) keeps the paging system from dropping out in the middle of a page.

Features:
Monitors audio activity over a wide range of input voltages
Two sets of C-Form (both N.O. and N. C.) relay contacts respond to audio activity
Four levels of signals: microphone, 600-ohm line, 25V, and 70V speaker systems
Built-in balanced, low noise, high gain microphone pre-amp
Transformer-isolated, 600-ohm small signal level output of detected audio available
Works with self-amplified or central-amplified paging systems
Separate microphone pre-amp gain control
Adjustable release delay: 0.25s to 25s
Trigger threshold adjustment
Relay active indicator light
Accessories: PRS40C 12V DC Power Supply (sold separately)

Specifications:
LINE INPUT
Impedance: 600 ohms
Frequency Response: 100 Hz to 10 kHz
70V Input Impedance: 200k ohms
Output Level: 400 mVrms
25V Input Impedance: 75k ohms
Output Level: 420 mVrms
MIC PRE-AMP
Gain: 62 dB
Sensitivity: 750 microvolts, rms for 1Vrms out
Distortion: < 2%
Frequency Response: 200 Hz to 10 kHz
Output Signal-to-Noise Ratio: 55 dB
GENERAL
VOX Sensitivity: 20 mV to 150 mVrms @ 600 ohms Line input
Time Delay Range (approx.): 0.25 to 25 sec.
Relay Contact Rating: 2A/30V DC, 0.5A/120V AC
Power Requirements: External 12V to 24V DC @ 100mA (sold separately)
Dimensions: 5-3/8" W × 3-7/8" H × 1-3/8" D
Product Weight: 1 lb.