The ST-ACR2 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-ACR2 is designed to switch on line level sources.
Two multiturn trimmers are provided. The SENS potentiometer adjusts the audio input sensitivity. A thresholdLED 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-ACR2 is from 5 seconds to 50 seconds.
Switching Controlled by Audio Signal
Sensing of Line-Level Signal
DPDT Switching Contacts
Open-Collector SLAVE Output
Audio Input: 10 kΩ balancedbridging
Input Connections: May be connected balanced or unbalanced
Control OutputOpen-collector @ 25 mA suitable to drive indicators or slave LCR relay
Radio Design Labs - RDL ST-ACR2 Line-Level Audio Controlled Relay - 5 to 50 s Delay
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