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.
Switching Controlled by Audio Signal
Sensing of Line-Level Signal
DPDT Switching Contacts
Open-Collector SLAVE Output
10 Kohm balanced bridging
May be connected balanced or unbalanced
Open-collector @ 25 mA suitable to drive indicators or slave LCR relay
Audio threshold LED (for setting sensitivity)
Max. Switching Power:
60 W, (220 VDC,125 VAC, 2A)
Activation Response Time:
-30 dBu to 0 dBu (adjustable)
Relay Release Delay:
0.5 sec. to 5.0 sec. nominal (adjustable)
(Assumes 20 mA max load at SLAVE output): GROUND-REFERENCED, 24 VDC @ 50 mA
Ambient Operating Environment:
0° C to 55° C
MCM Part #: 555-18872
Radio Design Labs Part #: ST-ACR1
Package Specifications & Dimensions
Weight: 0.1 lbs.
RoHS Comp: Yes
Warranty: 1095 days Need to Return?
Length: 4 in.
Width: 2 in.
Height: 2 in.
Extra Shipping Charge: No
Drop Ship: No