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Radio Design Labs ST-ACR1
Line-Level Audio Controlled Relay

OUR PART #:  STACR1

ST-ACR1 module is designed to switch on LINE-LEVEL sources. Its relatively short release delay time makes it the optimum choice for voice applications.
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Our Price: $102.21
List Price: $136.72
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Radio Design Labs ST-ACR1
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ST-ACR1 module is designed to switch on LINE-LEVEL sources. Its relatively short release delay time makes it the optimum choice for voice applications.

Each of the ST-ACR products is an Audio Controlled Relay in the group of STICK-ON series products by Radio Design Labs. These products are designed for quick, convenient installation, and reliable operation in a variety of control applications.

NOTE: Radio Design Labs' PS-24AS power supply is NOT included but is required in order to power this product.  Please see the "Accessories" tab or click here for more information on the PS-24AS power supply.

Features:

  • High-impedance bridging input connects across any audio line
  • Input may be connected to either balanced or unbalanced sources
  • Multiturn sensitivity adjustment permits precise threshold setting
  • Multiturn DELAY control adjusts relay release delay
  • Bandpass filtering yields triggering on characteristic audio spectrum
  • SLAVE open-collectorterminal allows additional relays to be added for more contacts (Radio DesignLabs' ST-LCR1 or ST-LCR2)
  • SLAVE terminal may beused with remote switch to manually override the control circuit and turn onthe relay

Specifications:

  • Audio Input: 10 kohm balanced bridging
  • Input Connections: May be connected balanced or unbalanced
  • Control Output: Open-collector @ 100 mA Suitable to drive indicators or Slave LCR's
  • Indicators: Audio threshold LED (for setting sensitivity level)
  • Retrigger Delay: approximately 250 ms
  • Relay Contacts: Double-Pole-Double-Throw
  • Maximum Switching Power: 60 W, 125 VA
  • Maximum Switching Voltage: 220 Vdc, 250 Vac
  • Maximum Switching Current: 2 A
  • Maximum Carrying Current: 3 A
  • Power Requirement: 24 to 33 Vdc @ 50 mA, Ground-Referenced
  • Input Sensitivity: Adjustable -30 dBu to 0 dBu This provides switching at a -20 dB threshold for signals of -10 dBu to +20 dBu
  • Relay Release Delay: Multiturn adjustable 0.5 sec. to 5.0 sec. nominal
  • Activation Response Time: 25 ms
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