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 507 Products in this Category.
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R25
  • 2 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$59.00/ea
R210
  • 2 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$69.00/ea
R85PRO
  • 8 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$139.00/ea
R810PRO
  • 8 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$159.00/ea
R45PRO
  • 4 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$99.00/ea
R410PRO
  • 4 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$109.00/ea
R120
  • 1 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$59.00/ea
R130
  • 1 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$69.00/ea
R21DPDT
  • 2 Relays
  • 1 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$59.00/ea
R23DPDT
  • 2 Relays
  • 3 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$64.00/ea
R25DPDT
  • 2 Relays
  • 5 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$69.00/ea
R220
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$79.00/ea
R230
  • 2 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$89.00/ea
R41DPDT
  • 4 Relays
  • 1 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$89.00/ea
R43DPDT
  • 4 Relays
  • 3 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$99.00/ea
R45DPDT
  • 4 Relays
  • 5 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$109.00/ea
R420
  • 4 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$149.00/ea
R430
  • 4 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$169.00/ea
R81DPDT
  • 8 Relays
  • 1 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$119.00/ea
R83DPDT
  • 8 Relays
  • 3 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$139.00/ea
R85DPDT
  • 8 Relays
  • 5 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$159.00/ea
R820
  • 8 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$209.00/ea
R830
  • 8 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$249.00/ea
IOADR85
  • 8 Relays
  • Amp SPDT
  • Serial Communication
  • Ideal Use: Switching
  • Series
  • Learn More
$209.00/ea
IOADR810
  • 8 Relays
  • Amp SPDT
  • Serial Communication
  • Ideal Use: Switching
  • Series
  • Learn More
$229.00/ea
IOADR820
  • 8 Relays
  • Amp SPDT
  • Serial Communication
  • Ideal Use: Switching
  • Series
  • Learn More
$279.00/ea
IOADR830
  • 8 Relays
  • Amp SPST
  • Serial Communication
  • Ideal Use: Switching
  • Series
  • Learn More
$319.00/ea
IOADR165
  • 16 Relays
  • Amp SPDT
  • Serial Communication
  • Ideal Use: Switching
  • Series
  • Learn More
$329.00/ea
IOADR1610
  • 16 Relays
  • Amp SPDT
  • Serial Communication
  • Ideal Use: Switching
  • Series
  • Learn More
$369.00/ea
IOADR1620
  • 16 Relays
  • Amp SPDT
  • Serial Communication
  • Ideal Use: Switching
  • Series
  • Learn More
$489.00/ea
IOADR1630
  • 16 Relays
  • Amp SPST
  • Serial Communication
  • Ideal Use: Switching
  • Series
  • Learn More
$569.00/ea
SSR82AC
  • 8 Channels
  • Serial Communication
  • Series
  • Learn More
$129.00/ea
PWM81
RS-232 8-Channel 1-Amp Speed Controller/Light Dimmer Board

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$99.00/ea
PWM83
RS-232 8-Channel 3-Amp Speed Controller/Light Dimmer Board

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$119.00/ea
PWM85
RS-232 8-Channel 5-Amp Speed Controller/Light Dimmer Board

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$134.00/ea
F81
RS-232 8-Channel 1-Amp N-Channel FET Controller Board

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$99.00/ea
F83
RS-232 8-Channel 3-Amp N-Channel FET Controller Board

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$119.00/ea
F85
RS-232 8-Channel 5-Amp N-Channel FET Controller Board

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$134.00/ea
R85OC8LP
  • 8 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$168.00/ea
R810OC8LP
  • 8 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$188.00/ea
R165PROXR
  • 16 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • Learn More
$259.00/ea
R1610PROXR
  • 16 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • Learn More
$299.00/ea
R81DPDTOC8LP
  • 8 Relays
  • 1 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$160.00/ea
R83DPDTOC8LP
  • 8 Relays
  • 3 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$180.00/ea
R85DPDTOC8LP
  • 8 Relays
  • 5 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$200.00/ea
R81DPDTR85PROXR
  • 16 Relays
  • Amp Hybrid
  • Serial Communication
  • Ideal Use: Switching
  • ProXR Series
  • Learn More
$260.00/ea
R81DPDTR810PROXR
  • 16 Relays
  • Amp Hybrid
  • Serial Communication
  • Ideal Use: Switching
  • ProXR Series
  • Learn More
$280.00/ea
R83DPDTR85PROXR
  • 16 Relays
  • Amp Hybrid
  • Serial Communication
  • Ideal Use: Switching
  • ProXR Series
  • Learn More
$280.00/ea
R83DPDTR810PROXR
  • 16 Relays
  • Amp Hybrid
  • Serial Communication
  • Ideal Use: Switching
  • ProXR Series
  • Learn More
$300.00/ea
R85DPDTR85PROXR
  • 16 Relays
  • Amp Hybrid
  • Serial Communication
  • Ideal Use: Switching
  • ProXR Series
  • Learn More
$300.00/ea
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