Precision Audio and AV Interface Products

Radio Design Labs

ST-VOX1 Voice Operated Relay

  • Switching Controlled by Voice Signal
  • Switching from Mic or Line Level Signals
  • Precise Threshold Adjustment
  • DPDT Switching Contacts
  • Open-Collector SLAVE Output
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

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.

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 -80 dBu to -50 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
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED 24 Vdc @ 50 mA *
* Assumes 20 mA max load at SLAVE
output
Dimensions:
Height: 0.7 in. (1.7 cm), Width: 3 in. (7.6cm), Depth 1.6 in. (3.9 cm)
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.2 lbs.
WEEE weight:
0.15 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
Format
High Res Images:
Format
Declaration of Conformity:
Format
PDF
A&E Specifications:
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STICK-ON SERIES

STICK-ONs are the original application-specific modules for the A/V, recording and broadcast industries. Module functions include signal detection, switching, pre-amplification, format conversion, line driving, power amplification, mixing, distribution, gain control, equalization, routing and more. Each STICK-ON is an ultra-compact module engineered to provide higher performance and longer life than other industry products. STICK-ON modules are solid encapsulated hybrid circuits in durable industrial black plastic enclosures (1.55", 3.94 cm x 3", 7.62 cm x 0.65", 1.65 cm) with clear bold white lettering for the terminal block connections, recessed trimming controls and switches.

Since RDL first originated application-specific modules, STICK-ONs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple STICK-ON modules can be interconnected to form all or part of an A/V system. A single STICK-ON module may be mounted right where its function is needed, often to add an input, output, or gain adjustment to existing equipment. STICK-ON modules allow customizing an A/V system to precisely match users’ needs. Adding STICK-ONs to an existing system can extend system life by adding updated features, resulting in considerable cost savings. A complete range of backboard and rack mounting options is available for systems comprised of multiple STICK-ON modules.

The technology used in STICK-ON modules has been regularly updated over the years to insure industry-leading performance. Functions and features provided by STICK-ONs, since their introduction, are still available today. This continuity in product offering and support makes STICK-ON modules the preferred long-term resource for system design solutions. STICK-ON SERIES modules are designed and manufactured in the U.S.A.

ST-VOX1 ST-VOX1