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:
- Switching Controlled by Audio Signal
- Sensing of Line-Level Signal
- Silence Sensing
- DPDT Switching Contacts
- Open-Collector SLAVE Output
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, 125 VA
Max. Switching Voltage:
220 Vdc, 250 Vac
Max. Switching Current:
2 A
Activation Response Time:
25 ms
Input Sensitivity:
-30 dBu to 0 dBu (adjustable)
Relay Release Delay:
0.5 sec. to 5.0 sec. nominal (adjustable)
Ambient Operating Environment:
0° C to 55° C
Power Requirement
GROUND-REFERENCED, 24 Vdc @ 50 mA*
* Assumes 20 mA max load at SLAVE output
Dimensions:
Height: 0.7 in. (1.7 cm), Width: 3 in. (7.6 cm), Depth: 1.6 in. (3.9 cm)
