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Radio Design Labs ST-ACR1



Audio Controlled Relay - Line Level Input

$141.93 $189.25
You save $47.32

The ST-ACR1 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-ACR1 is designed to switch on line 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 -30 dBu and 0 dBu. The DELAY control sets the time required for the relay to release when the audio drops below the threshold. The delay adjustment range for the ST-ACR1 is from 0.5 seconds to 5 seconds.

Requires 24-volt power supply (PS24A sold separately).

$141.93 $189.25
You save $47.32

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  • Main Features:
  • Switching Controlled by Audio Signal
  • Sensing of Line-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, 2A)
  • Activation Response Time:25 ms
  • Input Sensitivity:-30 dBu to 0 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