ST-ACR1 Line-Level Audio Controlled Relay – 0.5 to 5 s

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SKU: RDL-STACR1 Categories: ,


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