Precision Audio and AV Interface Products

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ST-ACR2 Line-Level Audio Controlled Relay - 5 to 50 s delay

  • Switching Controlled by Audio Signal
  • Sensing of Line-Level Signal
  • Silence Sensing
  • DPDT Switching Contacts
  • Open-Collector SLAVE Output
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The ST-ACR2 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-ACR2 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-ACR2 is from 5 seconds to 50 seconds.

Videos

Applications

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:
5 sec. to 50 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
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.2 lbs.
WEEE weight:
0.15 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
Format
High Res Images:
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Declaration of Conformity:
Format
PDF
A&E Specifications:
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STICK-ON SERIES

STICK-ONs are the original application-specific modules for the A/V, recording and broadcast industries. Module functions include signal detection, switching, pre-amplification, format conversion, line driving, power amplification, mixing, distribution, gain control, equalization, routing and more. Each STICK-ON is an ultra-compact module engineered to provide higher performance and longer life than other industry products. STICK-ON modules are solid encapsulated hybrid circuits in durable industrial black plastic enclosures (1.55", 3.94 cm x 3", 7.62 cm x 0.65", 1.65 cm) with clear bold white lettering for the terminal block connections, recessed trimming controls and switches.

Since RDL first originated application-specific modules, STICK-ONs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple STICK-ON modules can be interconnected to form all or part of an A/V system. A single STICK-ON module may be mounted right where its function is needed, often to add an input, output, or gain adjustment to existing equipment. STICK-ON modules allow customizing an A/V system to precisely match users’ needs. Adding STICK-ONs to an existing system can extend system life by adding updated features, resulting in considerable cost savings. A complete range of backboard and rack mounting options is available for systems comprised of multiple STICK-ON modules.

The technology used in STICK-ON modules has been regularly updated over the years to insure industry-leading performance. Functions and features provided by STICK-ONs, since their introduction, are still available today. This continuity in product offering and support makes STICK-ON modules the preferred long-term resource for system design solutions. STICK-ON SERIES modules are designed and manufactured in the U.S.A.

ST-ACR2 ST-ACR2