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Radio Design Labs ST-ACR1M



Control Relay - Mic Level Input

$142.27 $189.70
You save $47.43

Each of the ST-ACR products is an Audio Controlled Relay in the STICK-ON® series. These products are designed for quick, convenient installation, and reliable operation in a variety of control applications. The ST-ACR-1M is designed to switch on low-level sources, such as microphones or mic-level sources.

Two multiturn trimmers are provided. The SENS potentiometer adjusts the audio input sensitivity. A threshold LED facilitates accurate adjustment. The module can be set to trigger on signals between -65 dBu and -20 dBu. The DELAY control sets the time required for the relay to release when the audio drops below the threshold. The adjustment range is from 0.5 seconds to 5 seconds.

PS24AS power supply sold separately.

$142.27 $189.70
You save $47.43

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  • Main Features:
  • Switching Controlled by Audio Signal
  • Sensing of Microphone-Level Signal
  • Silence Sensing
  • DPDT Switching Contacts
  • Open-Collector SLAVE Output
  • Specifications:
  • Audio Input:10 kΩ balanced bridging
  • Input Connections:May be connected balanced or unbalanced
  • Control Output:Open-collector @ 25 mA suitable to drive indicators or slave LCR relay
  • Indicators:Audio threshold LED (for setting sensitivity)
  • Retrigger delay:250 ms
  • Contacts:Double-pole-double-throw
  • Max. Switching Power:60 W, (220 Vdc, 125 Vac, 2A0
  • Activation response time:25 ms
  • Input Sensitivity:-60 dBu to -20 dBu (adjustable)
  • Relay Release Delay:0.5 sec. to 5.0 sec. nominal (adjustable)
  • Power Requirement:GROUND-REFERENCED, 24 Vdc @ 50 mA* * Assumes 20 mA max load at SLAVE output
  • Ambient Operating Environment:0° C to 55° C