The VAR1 Voice-Activated Relay is a DPDT relay device that is activated when an audio signal is detected at the microphone pre-amp or at 70V 25V or 600-ohm line level inputs. It has a number of useful applications such as muting a sound system in response to a microphone or telephone page activation of accessory (security) equipment or activation of a zone paging module. A slide switch is included to select the pre-amp or the line inputs. The VOX detect circuit also includes volume sensitivity and delay controls.The audio output is an isolated 600-ohm transformer.The unit operates from a DC power source (not included). Features: 2 sets of C-Form (N.O. & N.C.) relay contacts respond to audio activity. 4 levels of input signals: microphone 600-ohm line 25V & 70V speaker systems. Built-in balanced low noise high gain microphone pre-amp. A transformer-isolated 600-ohm small signal level output of detected audio available. Trigger threshold adjustment.

• 2 sets of C-Form (N.O. & N.C.) relay contacts respond to audio activity
• Compatible with 4 input signal levels: microphone, 600-ohm line, 25V & 70V speaker systems
• Integrated balanced low noise high gain microphone pre-amp
• Transformer-isolated 600-ohm output for detected audio signals
• Adjustable trigger threshold for customized sensitivity

Product Tags

Voice-Activated Relay with Dual Input Options