Key Features
- Switching Controlled by Audio Signal
- Sensing of Microphone-Level Signal
- Silence Sensing
- DPDT Switching Contacts
- Open-Collector Slave Output
Description
Microphone Level Audio Controlled Relay - 0.5 to 5 s Delay
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.
Features:
- Switching Controlled by Audio Signal
- Sensing of Microphone-Level Signal
- Silence Sensing
- DPDT Switching Contacts
- Open-Collector SLAVE Output
Specifications:
- Audio Input:10 kΩ balanced bridging
- Input Connections:May be connected balanced or unbalanced
- Control Output:Open-collector @ 25 mA suitable to drive indicators or slave LCR relay
- Indicators:Audio threshold LED (for setting sensitivity)
- Retrigger delay:250 ms
- Contacts:Double-pole-double-throw
- Max. Switching Power:60 W, (220 Vdc, 125 Vac, 2A0
- Activation response time:25 ms
- Input Sensitivity:-60 dBu to -20 dBu (adjustable)
- Relay Release Delay:0.5 sec. to 5.0 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