USB, Ethernet, WiFi (802.11b), 802.15.4 Wireless, and RS-232 Serial Relay Controller Boards

USB, Ethernet, WiFi (802.11b), 802.15.4 Wireless, and RS-232 Serial Relay Controller Boards Allow Computer Controlled Switching using many connectivity options. We have a large number of relay controllers for high-current computer controlled switching as well as low-current signal switching. Relays typically have three connections: Normally Open, Common, and Normally Closed. In most applications, you will connect external devices, such as lights and motors, between the Common and Normally Open lines. When the relay is activated via software, your device is powered. Relay controllers are ideal for activating motors, lights, solenoids, and much more...all under computer control. Click on product photos below for additional information.

Relay Controllers

Displaying 1 - 50 of 438 Products in this Category.
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ADR220PROXR
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$154.00/ea
ADR230PROXR
  • 2 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$164.00/ea
ADR410PROXR
  • 4 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$184.00/ea
ADR45PROXR
  • 4 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$174.00/ea
ADR810PROXR
  • 8 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$184.00/ea
ADR85PROXR
  • 8 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$164.00/ea
ADSSR4xPROXR
  • 4 Relays
  • Optional Amp Solid-State
  • Serial Communication
  • Ideal Use: SS Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$124.00/ea
ADSSR4xPROXR_MIX
  • 4 Relays
  • Optional Amp Solid-State
  • Serial Communication
  • Ideal Use: SS Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$124.00/ea
ADSSR8xPROXR
  • 8 Relays
  • Optional Amp Solid-State
  • Serial Communication
  • Ideal Use: SS Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$214.00/ea
ADSSR8xPROXR_MIX
  • 8 Relays
  • Optional Amp Solid-State
  • Serial Communication
  • Ideal Use: SS Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$164.00/ea
BTADR1620PROXR
  • 16 Relays
  • 20 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$521.00/ea
BTADR1630PROXR
  • 16 Relays
  • 30 Amp SPST
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$585.00/ea
BTADR220PROXR
  • 2 Relays
  • 20 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$234.00/ea
BTADR230PROXR
  • 2 Relays
  • 30 Amp SPST
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$234.00/ea
BTADR3220PROXR
  • 32 Relays
  • 20 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$816.00/ea
BTADR3230PROXR
  • 32 Relays
  • 30 Amp SPST
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$939.00/ea
BTADR410PROXR
  • 4 Relays
  • 10 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$254.00/ea
BTADR45PROXR
  • 4 Relays
  • 5 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$244.00/ea
BTADR810PROXR
  • 8 Relays
  • 10 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$304.00/ea
BTADR85PROXR
  • 8 Relays
  • 5 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$284.00/ea
BTADSR1610PROXR
  • 16 Relays
  • 10 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$450.00/ea
BTADSR161DPDTPROXR
  • 16 Relays
  • 1 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$412.00/ea
BTADSR163DPDTPROXR
  • 16 Relays
  • 3 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$452.00/ea
BTADSR165DPDTPROXR
  • 16 Relays
  • 5 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$492.00/ea
BTADSR165PROXR
  • 16 Relays
  • 5 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$409.00/ea
BTADSR2410PROXR
  • 24 Relays
  • 10 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$564.00/ea
BTADSR241DPDTPROXR
  • 24 Relays
  • 1 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$543.00/ea
BTADSR243DPDTPROXR
  • 24 Relays
  • 3 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$603.00/ea
BTADSR245DPDTPROXR
  • 24 Relays
  • 5 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$663.00/ea
BTADSR245PROXR
  • 24 Relays
  • 5 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$499.00/ea
BTADSR3210PROXR
  • 32 Relays
  • 10 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$679.00/ea
BTADSR321DPDTPROXR
  • 32 Relays
  • 1 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$674.00/ea
BTADSR323DPDTPROXR
  • 32 Relays
  • 3 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$754.00/ea
BTADSR325DPDTPROXR
  • 32 Relays
  • 5 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$834.00/ea
BTADSR325PROXR
  • 32 Relays
  • 5 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$599.00/ea
BTADSRR32-5SPDTPROXR
  • 32 Relays
  • 0.5 Amp Reed
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$784.00/ea
BTADSRR32-5SPSTPROXR
  • 32 Relays
  • 0.5 Amp Reed
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$624.00/ea
BTADSSR4xPROXR
  • 4 Relays
  • Optional Amp Solid-State
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: SS Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$244.00/ea
BTADSSR4xPROXR_MIX
  • 4 Relays
  • Optional Amp Solid-State
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: SS Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$244.00/ea
BTADSSR8xPROXR
  • 8 Relays
  • Optional Amp Solid-State
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: SS Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$284.00/ea
BTADSSR8xPROXR_MIX
  • 8 Relays
  • Optional Amp Solid-State
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: SS Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$284.00/ea
BTUXPR1620PROXR
  • 16 Relays
  • 20 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • XR and UXP Expansion Ports
  • Learn More
$521.00/ea
BTUXPR1630PROXR
  • 16 Relays
  • 30 Amp SPST
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • XR and UXP Expansion Ports
  • Learn More
$585.00/ea
BTUXPR3220PROXR
  • 32 Relays
  • 20 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • XR and UXP Expansion Ports
  • Learn More
$816.00/ea
BTUXPR3230PROXR
  • 32 Relays
  • 30 Amp SPST
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • XR and UXP Expansion Ports
  • Learn More
$930.00/ea
BTUXPSR1610PROXR
  • 16 Relays
  • 10 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • XR and UXP Expansion Ports
  • Learn More
$449.00/ea
BTUXPSR161DPDTPROXR
  • 16 Relays
  • 1 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • XR and UXP Expansion Ports
  • Learn More
$412.00/ea
BTUXPSR163DPDTPROXR
  • 16 Relays
  • 3 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • XR and UXP Expansion Ports
  • Learn More
$452.00/ea
BTUXPSR165DPDTPROXR
  • 16 Relays
  • 5 Amp DPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Signal Switching
  • ProXR Series
  • XR and UXP Expansion Ports
  • Learn More
$492.00/ea
BTUXPSR165PROXR
  • 16 Relays
  • 5 Amp SPDT
  • Bluetooth Communication
  • Range: 328 ft.
  • Ideal Use: Power Switching
  • ProXR Series
  • XR and UXP Expansion Ports
  • Learn More
$409.00/ea
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