ST-ACR1M

Microphone Level Audio Controlled Relay - 0.5 to 5 s delay

SKU: ST-ACR1M

Switching Controlled by Audio Signal
Sensing of Microphone-Level Signal
Silence Sensing
DPDT Switching Contacts
Open-Collector SLAVE Output

Recommended Power Supply ( Not Included )
PS-24AS (USA)	PS-24AX (International)

Category: Switching & Control

Description

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.

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, 2A)
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)
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)
Package Type:	Cardboard Box
WEEE weight:	0.145 lbs.
Shipping Weight:	0.2 lbs.
Tariff code:	8543.70.9860
Package Dimensions:	2 x 2 x 4 in.