RDL ST-VOX1 Installation Voice Operated Relay

 

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Dale #:RDL-STVOX1

Please Note: requires PS-24AS Power Supply (sold separately)

Availability: Usually ships in 5 - 10 Days

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  • 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

    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.

    APPLICATION:

    The ST-VOX1 is an audio controlled relay in the group of STICK-ON series products by Radio Design Labs. These products are designed for quick, convenient installation and reliable operation in a variety of control applications. The ST-VOX1 is specifically designed to switch reliably on voice signals.

    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. The ST-VOX1 releases very quickly, but holds on through very short pauses in syllables common to speech. These time constants allow the design of a communications system yielding comfortable two-way conversation.

    High-impedance inputs connect across any unbalanced audio line; Multi-turn sensitivity adjustment permits precise threshold setting; Multi-turn DELAY control adjusts relay release delay; Tight bandpass filtering yields triggering on voice frequencies; Slave open-collector terminal allows additional relays to be added for more contacts (RDL's ST-LCR1); Slave terminal may be used with remote switch to manually override the control circuit and turn on the relay

  • Mic Input:5 k unbalanced line
    Line Input:200 k 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 to 33 Vdc @ 50 mA *
    * Assumes 20 mA max load at SLAVE
    output
    Ambient Operating Environment:0 degrees C to 55 degrees C
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