With our New Reactor Series Relay Controllers your application no longer has to be Computer Controlled.
No programming is required to configure the device using our free Configuration Utility. Simply set it up, install it, and leave it.
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Dual SPDT Relay

2 Channel SPDT Controller Board

SPDT Single Pole Double Throw Relay

SPDT Single Pole Double Throw Relays have three connections.  Common, Normally Open, and Normally Closed.  When the relay is off, the common is connected to the normally closed connection of the relay.  When the relay coil is energized, the Common swings over to the Normally Open Connection of the Relay.

Large Selection

We offer a large selection of Two Channel SPDT Relay Boards for applications ranging from small signal switching to high voltage, high current applications.  If your looking for a 802.15.4 Wireless SPDT Relay, USB SPDT Relay or Bluetooth SPDT Relay we have the largest connection options around.

Latest Advancements

Look for our ProXR series controllers for the latest advancements in signal switching!  The ProXR Series is capable of controlling up to 256 relays.  Control one relay at a time or all 256 relays at once with manual and automatic refreshing command set!  With our SPDT signal switching, the ProXR Series are built from the ground up with Expansion in mind.  Simply Chain the XR Expansion Modules, one after another, to meet your computer controlled switching requirements.  Your system will grow as your needs grow by simply plugging in modules as needed.  All boards in the ProXR Series will have the ProXR suffix in the part number.    For more detailed information and to order, please click on the links below.

2-Channel SPDT Relay Controller Boards

R25
RS-232 2-Channel 5-Amp SPDT Relay Controller Board
$59.00
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R210
RS-232 2-Channel 10-Amp SPDT Relay Controller Board
$69.00
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R220
2-Channel RS-232 20-Amp SPDT High-Power Relay Controller Board
$79.00
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UADR220PROXR
USB Relay Controller 2-Channel 20 Amp SPDT + 8-Channel 8/10-Bit A/D
$126.00
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ZADR220PROXR
802.15.4 Wireless Relay Controller 2-Channel 20 Amp SPDT + 8-Channel 8/10-Bit A/D
$139.00
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ADR220PROXR
RS-232 Relay Controller 2-Channel 20 Amp SPDT + 8-Channel 8/10-Bit A/D
$104.00
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BTADR220PROXR
Bluetooth Wireless Relay Controller 2-Channel 20 Amp SPDT + 8-Channel 8/10-Bit A/D
$174.00
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FOADR220PROXR
Fiber Optic Relay Controller 2-Channel 20 Amp SPDT + 8-Channel 8/10-Bit A/D
$164.00
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R25RS
RS-232 2-Channel 5-Amp SPDT Relay Controller with RS-232 Interface
$69.00
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R210RS
2-Channel RS-232 10-Amp SPDT Relay Controller with RS-232 Interface
$79.00
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R220HP
LOW COST 2-Channel 20A SPDT RS-232 Relay Controller
$24.00
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R220HPRS
LOW COST 2-Channel 20A SPDT Relay Controller with RS-232 Interface
$34.00
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R220RS
2-Channel 20A SPDT Relay Controller with RS-232 Interface
$89.00
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R230RS
2-Channel 30A SPST Relay Controller with RS-232 Interface
$99.00
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ZR25
2-Channel 5-Amp SPDT 802.15.4 Wireless Relay Controller
$93.00
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ZR210
2-Channel 10-Amp SPDT 802.15.4 Wireless Relay Controller
$103.00
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ZR220
2-Channel 20-Amp SPDT 802.15.4 Wireless Relay Controller
$113.00
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ZR220HP
LOW COST 2-Channel 20A SPDT 802.15.4 Wireless Relay Controller
$58.00
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ZR25_XSC
XSC Long Range Wireless Controller 2-Channel 5-Amp SPDT
$138.00
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ZR210_XSC
XSC Long Range Wireless Controller 2-Channel 10-Amp SPDT
$148.00
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ZR220_XSC
XSC Long Range Wireless Controller 2-Channel 20-Amp SPDT
$158.00
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ZADR220PROXR_ZBMESH
ZB ZigBee Relay Controller 2-Channel 20 Amp SPDT + 8-Channel 8/10-Bit A/D
$139.00
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ZR25_ZBMESH
2-Channel 5-Amp SPDT ZB ZigBee Relay Controller
$93.00
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ZR210_ZBMESH
2-Channel 10-Amp SPDT ZB ZigBee Relay Controller
$103.00
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ZR220_ZBMESH
2-Channel 20-Amp SPDT ZB ZigBee Relay Controller
$113.00
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ZR220HP_ZBMESH
LOW COST 2-Channel 20A SPDT ZB ZigBee Relay Controller
$58.00
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