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 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-ACR2 is from 5 seconds to 50 seconds.
Main Features:
• Switching Controlled by Audio Signal
• Sensing of Line-Level Signal
• Silence Sensing
• DPDT Switching Contacts
• Open-Collector SLAVE Output
Specifications:
• Input Connections:May be connected balanced or unbalanced vControl OutputOpen-collector @ 25 mA suitable to drive indicators or slave LCR relay
• Indicators:Audio threshold LED (for setting sensitivity)
• Retrigger Delay250 ms
• Contacts:Double-pole-double-throw
• Max. Switching Power:60 W, 125 VA
• Max. Switching Voltage:220 Vdc, 250 Vac
• Max. Switching Current:2 A
• Max. Carrying Current:3 A
• Activation Response Time:25 ms
• Input Sensitivity:-30 dBu to 0 dBu (adjustable)
• Relay Release Delay:5 sec. to 50 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
