Radio Design Labs ST-ACR1
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Line-Level Controlled Relay - 0.5 to 5 s Delay
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.
Features:
• High-impedance bridging input connects across any audio line
• Input may be connected to either balanced or unbalanced sources
• Multi-turn sensitivity adjustment permits precise threshold setting
• Multi-turn DELAY control adjusts relay release delay
• Band-pass filtering yields triggering on characteristic audio spectrum
• SLAVE terminal may also be used to trigger the control inputs on various other RDL Modules
• SLAVE terminal may be used with remote switch to manually override the control circuit and turn on the relay
• SLAVE open-collector terminal allows additional relays to be added for more contacts (RDL’s ST-LCR1 or ST-LCR2)
