National Control Devices, LLC

World's Largest Manufacturer of Computer Controlled Switching Devices Since 1995.
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24 Channel SPDT Relay

24 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 Twenty Four 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.

24-Channel SPDT Relay Boards

R245PROXR
24-Channel 5A SPDT RS-232 Latching Relay Board with XR Expansion Port
$354.00
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R2410PROXR
24-Channel 10A SPDT RS-232 Latching Relay Board with XR Expansion Port
$414.00
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R121DPDTR125PROXR
12-Channel 1A DPDT Relay + 12-Channel 5A SPDT RS-232 Relay Board
$386.00
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R121DPDTR1210PROXR
12-Channel 1A DPDT Relay + 12-Channel 10A SPDT RS-232 Relay Board
$416.00
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R123DPDTR125PROXR
12-Channel 3A DPDT Relay + 12-Channel 5A SPDT RS-232 Relay Board
$416.00
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R123DPDTR1210PROXR
12-Channel 3A DPDT Relay + 12-Channel 10A SPDT RS-232 Relay Board
$446.00
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R125DPDTR125PROXR
12-Channel 5A DPDT Relay + 12-Channel 5A SPDT RS-232 Relay Board
$446.00
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R125DPDTR1210PROXR
12-Channel 5A DPDT Relay + 12-Channel 10A SPDT RS-232 Relay Board
$476.00
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ZUXPSR245PROXR
802.15.4 Wireless Relay Controller Board 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
$419.00
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ZUXPSR2410PROXR
802.15.4 Wireless Relay Controller Board 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
$479.00
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UXPSR245PROXR
USB Relay Controller 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
$411.00
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UXPSR2410PROXR
USB Relay Controller 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
$471.00
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BTADSR245PROXR
Bluetooth Relay Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
$449.00
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BTADSR2410PROXR
Bluetooth Relay Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
$514.00
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BTUXPSR245PROXR
Bluetooth Relay Controller Board 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
$454.00
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BTUXPSR2410PROXR
Bluetooth Relay Controller Board 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
$514.00
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FOADSR245PROXR
Fiber Optic Relay Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
$444.00
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FOADSR2410PROXR
Fiber Optic Relay Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
$504.00
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FOUXPSR2410PROXR
Fiber Optic Relay Board 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
$504.00
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FOUXPSR245PROXR
Fiber Optic Relay Board 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
$444.00
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ZADSR2410PROXR
802.15.4 Wireless Relay Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
$479.00
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ZADSR2410PROXR_XSC
XSC Long Range Wireless Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
$559.00
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ZADSR2410PROXR_ZBMESH
ZB ZigBee Mesh Networking Relay Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
$479.00
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ZADSR245PROXR
802.15.4 Wireless Relay Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
$419.00
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ZADSR245PROXR_XSC
XSC Long Range Wireless Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
$499.00
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ZADSR245PROXR_ZBMESH
ZB ZigBee Mesh Networking Relay Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
$419.00
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ZUXPSR2410PROXR_XSC
XSC Long Range Wireless Controller 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
$559.00
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ZUXPSR2410PROXR_ZBMESH
ZB ZigBee Mesh Networking Relay Controller Board 24-Channel 10 Amp SPDT + UXP Universal Expansion
$479.00
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ZUXPSR245PROXR_XSC
XSC Long Range Wireless Controller 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
$499.00
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ZUXPSR245PROXR_ZBMESH
ZB ZigBee Mesh Networking Relay Controller Board 24-Channel 5 Amp SPDT + UXP Universal Expansion P
$419.00
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About National Control Devices
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National Control Devices, LLC

PO Box 455 - Osceola - MO - 64776
Phone: 417.646.5644 - Fax: 866.562.0406
Open 9AM-4PM Central Standard Time
http://www.relaycontrollers.com/