RDL STACR1 Line-Level Audio Controlled Relay

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.

Features

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

Specifications

• Audio Input: 10 kΩ balanced bridging
• Input Connections: May be connected balanced or unbalanced
• Control Output: Open-collector @ 100 mA Suitable to drive indicators or Secondary 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

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.