RDL ST-ACR1 - Line-Level Audio Controlled Relay (0.5 to 5 Second Delay)

RDL ST-ACR1 - Line-Level Audio Controlled Relay (0.5 to 5 Second Delay)
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RDL ST-ACR1 Overview

The RDL ST-ACR1 is an audio controlled relay and part of RDL's "Stick-On" series of equipment. It is designed for reliable operation and quick, easy installation. The ST-ACR1 is designed to switch line-level signals. Two multi-turn trimmers are provided, one for audio input sensitivity, and one for delay control.

The unit can be triggered from signals between -30 to 0 dBu, and an indicator LED allows accurate adjustments of the input sensitivity. The delay control sets the time delay for relay release when the audio drops below the pre-set threshold. The delay can be set from 0.5 to 5 seconds.

Small, compact unit can be easily mounted almost anywhere
Switching from line signals
Accepts balanced or unbalanced signals
Silence sensing
DPDT switching contacts
Open-collector slave output
UPC: 813721011152


Audio Input10 k ohms Balanced Bridging
Input ConnectionsBalanced or Unbalanced
Control OutputOpen-Collector @ 50mA Suitable to Drive Indicators or Slave LCR Relay
IndicatorsAudio Threshold LED for Setting Sensitivity
Retrigger Delay250 ms
ContactsDouble-Pole, Double-Throw
Switching Power60W, 125 VAC (Max)
Switching Voltage220 VDC, 250 VAC (Max)
Switching Current2 A (Max)
Carrying Current3 A (Max)
Activation Response Time25 ms
Input Sensitivity-30 dBu to 0 dBu (Adjustable, Provides Switching at a -20dB Threshold for Signals of -10 dBu to +20 dBu)
Relay Release Delay0.5 to 5 seconds (Multi-Turn Adjustable)
Power Requirements24 to 33VDC @ 50mA (Ground-Referenced)
Dimensions1.6 x 3 x 0.7" (41 x 76 x 18 mm)
Packaging Info
Package Weight0.2 lb
Box Dimensions (LxWxH)4.1 x 2.05 x 2"
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