RDL ST-VOX1 Installation Voice Operated Relay
Availability:
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Description
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.
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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 Time | Relay 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 |
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 Time | Relay 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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