ST-ACR1M Microphone Level Audio Controlled Relay – 0.5 to 5 s

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SKU: RDL-STACR1M Categories: ,


  • Switching Controlled by Audio Signal
  • Sensing of Microphone‑Level Signal
  • Silence Sensing
  • DPDT Switching Contacts
  • Open‑Collector SLAVE Output
  • 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.