RDL ST-VOX1 Voice Operated Relay

Voice Operated Relay

The ST-VOX1 is an Audio Controlled Relay in the STICK-ON series. When used in intercom or talkback applications, the ST-VOX1 may be triggered directly from an unbalanced microphone. In many such installations the microphone or other audio source must be preamplified, making the ST-VOX1 an ideal mate to work with the STM-1 preamp. The unbalanced output from the STM-1 can be used to trigger the ST-VOX1, while the STM-1 balanced output is used for the audio feed.

Features:

• Switching Controlled by Voice Signal
• Switching from Mic or Line Level Signals
• Precise Threshold Adjustment
• DPDT Switching Contacts
• Open-Collector SLAVE Output

Specifications:

• Mic Input:5 kΩ unbalanced line
• Line Input:200 kΩ unbalanced
• Control Outputs:Open-Collector @ 25 mA, suitable to drive indicators or Slave LCR
• Relay Contacts:Double-pole-double-throw
• Max. Switching Power:60 W, (220 Vdc, 125 Vac, 2A)
• Mic Input Sensitivity:Adjustable -75 dBu to -25 dBu
• Line Input Sensitivity:Adjustable -45 dBu to -15 dBu
• Indicators:Audio threshold LED (for setting sensitivity)
• Retrigger Delay:50 ms
• Release Delay Time Adjustment Range:Relay Contacts: 70 to 260 ms
• Slave open-collector output: 15 to 260 ms
• Activation Response TimeRelay Contacts: 5 ms
• Slave open-collector output: 3 ms
• Power Requirement:GROUND-REFERENCED 24 Vdc @ 50 mA *
• * Assumes 20 mA max load at SLAVE
• output
• Ambient Operating Environment:0 C to 55 C