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

OUR PART #  STACR1

Our Price: $100.21
List Price: $134.04
You save 25%! (Low Price Guarantee)
In Stock

Recommended Accessories

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
Stick-On Mounting Rack for 10 UnitsRadio Design Labs SR-10 Stick-On Mounting Rack for 10 Units

Radio Design Labs' STR-10 Racking System holds up to 10 STICK-ON units.  It holds STICK-ONs at an angle allowing for control adjustment from either the edge of a STICK-ON, or the top (depending on where the adjustment is located on ...

In Stock

Free Shipping Available

Our Price:$64.12List Price: $85.76You save 25%!

Dual Unbalanced RCA Jack BoxRadio Design Labs ACB2 Dual Unbalanced RCA Jack Box

Features all metal construction with two unbalanced RCA jacks pre mounted and ready for wiring through the nylon bushing opening. ACB Size: 7/8" x 1 1/8" x 2 1/4" (22mm x 29mm x 57mm)

In Stock

Our Price:$29.39List Price: $39.31You save 25%!

24 VDC 500mA Switching Power SupplyRadio Design Labs PS-24AS 24 VDC 500mA Switching Power Supply

Radio Design Labs' PS-24AS is a 24 Vdc switching power supply with a North American AC plug.  500 mA, dc plug.Specifications: Input: 100 to 240 VACOutput: 24 Vdc, 500 mA (UL, CSA)Dimensions: 1.65" x 2.75" x 1.45" (4.2 x 7 x 3.7 ...

In Stock

Our Price:$22.93List Price: $30.67You save 25%!

Din Rail Adaptor for STICK-ON Radio Design Labs DRA-35S Din Rail Adaptor for STICK-ON

The DRA-35S is a 35 mm DIN rail mounting bracket that provides positive mounting for any RDL STICK-ON® module. The oblique mounting angle of the DRA-35S allows an installer to mount several STICK-ON modules to a single DIN rail. Access to ...

In Stock

Our Price:$19.02List Price: $22.44You save 15%!

Kit to Mount ST, TX Series Modules on FP PanelRadio Design Labs MB3-RDL Kit to Mount ST, TX Series Modules on FP Panel

TX or STICK-ON Module fastens to MB-3 which slides into FP-RRA/H track.

In Stock

Our Price:$5.01List Price: $6.70You save 25%!

Mounting Kit for STICK-ON, TX, or Rack-Up moduleRadio Design Labs MB1-RDL Mounting Kit for STICK-ON, TX, or Rack-Up module

Two mounting brackets mounts a STICK-ON, TX, or Rack-Up module to a flat surface.

In Stock

Our Price:$3.40List Price: $4.00You save 15%!

Rackmount Kit for 10 Stick-On UnitsRadio Design Labs STR-19B Rackmount Kit for 10 Stick-On Units

Radio Design Labs' STR-19B Racking System holds up to 10 STICK-ON unitss in a 19 inch rack and only occupies two rack spaces. The STR-19B holds STICK-ONs at an angle allowing for control adjustment from either the edge of a STICK-ON, or ...

Usually ships in 7-14 business days.
Need it sooner? Call us!

Free Shipping Available

Our Price:$159.34List Price: $213.14You save 25%!

Rackmount System for 12 Stick-On UnitsRadio Design Labs STR-19A Rackmount System for 12 Stick-On Units

Radio Design Labs' STR-19A Racking System holds up to 12 STICK-ONs in a 19" rack and only occupies two rack spaces.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Free Shipping Available

Our Price:$134.02List Price: $179.28You save 25%!

Single RACK-UP Mounting Bay Utility ChassisRadio Design Labs UC-1 Single RACK-UP Mounting Bay Utility Chassis

Radio Design Labs' UC-1 is an ULTRASTYLE design tabletop chassis for mounting RDL modules and accessories. The front panel features a single RACK-UP mounting bay. The rear panel has an identical mounting bay and is supplied with matching ...

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$84.01List Price: $112.37You save 25%!

Mounting Frame for Stick/TXRadio Design Labs SR-4 Mounting Frame for Stick/TX

Radio Design Labs' SR-4 is a universal module chassis that can mount to a backboard, wall or nearly any other support. It provides mounting for 4 STICK-ON power amplifiers or 7 standard STICK-ON modules. TX ™ modules may also be mounted. ...

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$83.21List Price: $111.30You save 25%!

STICK-ON Series 19"W Mounting Rack for up to12 ModulesRadio Design Labs SR-12A STICK-ON Series 19"W Mounting Rack for up to12 Modules

Radio Design Labs' SR-12A chassis can be mounted in a rack or on a backboard to provide mounting of 12 STICK-ONs.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$64.12List Price: $85.76You save 25%!

Mounting Strip for STICK-ON UnitsRadio Design Labs Smk 12 Mounting Strip for STICK-ON Units

The SMK-12 allows removable surface (up to 6 units) or edge (typically 12, max. 16) mounting of STICK-ON units. They can be fastened to its surface using screws or adhesive foam pads.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$27.45List Price: $36.72You save 25%!

Detachable Terminal BlockRadio Design Labs Dtb Rdl Detachable Terminal Block

Use DTB's to quickly detach and reattach wiring harness to STICK-ON units.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$6.78List Price: $8.00You save 15%!

Click to download

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

OUR PART #  STACR1

Product Information:

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
Stick-On Mounting Rack for 10 UnitsRadio Design Labs SR-10 Stick-On Mounting Rack for 10 Units

Radio Design Labs' STR-10 Racking System holds up to 10 STICK-ON units.  It holds STICK-ONs at an angle allowing for control adjustment from either the edge of a STICK-ON, or the top (depending on where the adjustment is located on ...

In Stock

Free Shipping Available

Our Price:$64.12List Price: $85.76You save 25%!

Dual Unbalanced RCA Jack BoxRadio Design Labs ACB2 Dual Unbalanced RCA Jack Box

Features all metal construction with two unbalanced RCA jacks pre mounted and ready for wiring through the nylon bushing opening. ACB Size: 7/8" x 1 1/8" x 2 1/4" (22mm x 29mm x 57mm)

In Stock

Our Price:$29.39List Price: $39.31You save 25%!

24 VDC 500mA Switching Power SupplyRadio Design Labs PS-24AS 24 VDC 500mA Switching Power Supply

Radio Design Labs' PS-24AS is a 24 Vdc switching power supply with a North American AC plug.  500 mA, dc plug.Specifications: Input: 100 to 240 VACOutput: 24 Vdc, 500 mA (UL, CSA)Dimensions: 1.65" x 2.75" x 1.45" (4.2 x 7 x 3.7 ...

In Stock

Our Price:$22.93List Price: $30.67You save 25%!

Din Rail Adaptor for STICK-ON Radio Design Labs DRA-35S Din Rail Adaptor for STICK-ON

The DRA-35S is a 35 mm DIN rail mounting bracket that provides positive mounting for any RDL STICK-ON® module. The oblique mounting angle of the DRA-35S allows an installer to mount several STICK-ON modules to a single DIN rail. Access to ...

In Stock

Our Price:$19.02List Price: $22.44You save 15%!

Kit to Mount ST, TX Series Modules on FP PanelRadio Design Labs MB3-RDL Kit to Mount ST, TX Series Modules on FP Panel

TX or STICK-ON Module fastens to MB-3 which slides into FP-RRA/H track.

In Stock

Our Price:$5.01List Price: $6.70You save 25%!

Mounting Kit for STICK-ON, TX, or Rack-Up moduleRadio Design Labs MB1-RDL Mounting Kit for STICK-ON, TX, or Rack-Up module

Two mounting brackets mounts a STICK-ON, TX, or Rack-Up module to a flat surface.

In Stock

Our Price:$3.40List Price: $4.00You save 15%!

Rackmount Kit for 10 Stick-On UnitsRadio Design Labs STR-19B Rackmount Kit for 10 Stick-On Units

Radio Design Labs' STR-19B Racking System holds up to 10 STICK-ON unitss in a 19 inch rack and only occupies two rack spaces. The STR-19B holds STICK-ONs at an angle allowing for control adjustment from either the edge of a STICK-ON, or ...

Usually ships in 7-14 business days.
Need it sooner? Call us!

Free Shipping Available

Our Price:$159.34List Price: $213.14You save 25%!

Rackmount System for 12 Stick-On UnitsRadio Design Labs STR-19A Rackmount System for 12 Stick-On Units

Radio Design Labs' STR-19A Racking System holds up to 12 STICK-ONs in a 19" rack and only occupies two rack spaces.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Free Shipping Available

Our Price:$134.02List Price: $179.28You save 25%!

Single RACK-UP Mounting Bay Utility ChassisRadio Design Labs UC-1 Single RACK-UP Mounting Bay Utility Chassis

Radio Design Labs' UC-1 is an ULTRASTYLE design tabletop chassis for mounting RDL modules and accessories. The front panel features a single RACK-UP mounting bay. The rear panel has an identical mounting bay and is supplied with matching ...

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$84.01List Price: $112.37You save 25%!

Mounting Frame for Stick/TXRadio Design Labs SR-4 Mounting Frame for Stick/TX

Radio Design Labs' SR-4 is a universal module chassis that can mount to a backboard, wall or nearly any other support. It provides mounting for 4 STICK-ON power amplifiers or 7 standard STICK-ON modules. TX ™ modules may also be mounted. ...

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$83.21List Price: $111.30You save 25%!

STICK-ON Series 19"W Mounting Rack for up to12 ModulesRadio Design Labs SR-12A STICK-ON Series 19"W Mounting Rack for up to12 Modules

Radio Design Labs' SR-12A chassis can be mounted in a rack or on a backboard to provide mounting of 12 STICK-ONs.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$64.12List Price: $85.76You save 25%!

Mounting Strip for STICK-ON UnitsRadio Design Labs Smk 12 Mounting Strip for STICK-ON Units

The SMK-12 allows removable surface (up to 6 units) or edge (typically 12, max. 16) mounting of STICK-ON units. They can be fastened to its surface using screws or adhesive foam pads.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$27.45List Price: $36.72You save 25%!

Detachable Terminal BlockRadio Design Labs Dtb Rdl Detachable Terminal Block

Use DTB's to quickly detach and reattach wiring harness to STICK-ON units.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Our Price:$6.78List Price: $8.00You save 15%!

Click to download

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