Bing ads convertion tracker RDL ST-VOX1
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Audio Control, Vox 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.

PS24AS power supply sold separately.

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


• 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

RDL ST-VOX1 Figure 1

RDL ST-VOX1 Figure 2

List Price: $169.09
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