MCM Electronics

0.5 ~ 5 Second Delay Mic Level Controlled Relay By Radio Design Labs (ST-ACR1M) MCM Part #555-18874

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$94.99 
MSRP: $129.61
You Save: $34.62 (27 %)
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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.

Specifications Top

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 kO 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(Assumes 20 mA max load at SLAVE): GROUND-REFERENCED, 24 Vdc @ 50 mA output
Ambient Operating Environment: 0° C to 55° C

Part Numbers
MCM Part #:555-18874
Radio Design Labs Part #:ST-ACR1M
Package Specifications & Dimensions
Weight:0.0625 lbs.
Hazardous:No
RoHS Comp:Yes
Warranty:1095 days
Need to Return?
Length:4 in.
Width:2 in.
Height:2 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No

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