National Control Devices

National Control Devices, LLC

World's Largest Manufacturer of Computer Controlled Switching Devices Since 1995.
Have Questions?Access our online support, FAQs, application videos and more via AccessNCD
Search:

Items in Cart

Basket Empty
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.
SECURE SERVER
Visit one of our other
great web sites:
www.SignalSwitch.com
www.RelayControllers.com

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 Controller Boards

R245PROXR
24-Channel 5A SPDT RS-232 Relay Controller with XR Expansion Port
More >>
$354.00
Order this Device
R2410PROXR
24-Channel 10A SPDT RS-232 Relay Controller with XR Expansion Port
More >>
$414.00
Order this Device
R121DPDTR125PROXR
12-Channel 1A DPDT Relay + 12-Channel 5A SPDT RS-232 Relay Controller
More >>
$386.00
Order this Device
R121DPDTR1210PROXR
12-Channel 1A DPDT Relay + 12-Channel 10A SPDT RS-232 Relay Controller
More >>
$416.00
Order this Device
R123DPDTR125PROXR
12-Channel 3A DPDT Relay + 12-Channel 5A SPDT RS-232 Relay Controller
More >>
$416.00
Order this Device
R123DPDTR1210PROXR
12-Channel 3A DPDT Relay + 12-Channel 10A SPDT RS-232 Relay Controller
More >>
$446.00
Order this Device
R125DPDTR125PROXR
12-Channel 5A DPDT Relay + 12-Channel 5A SPDT RS-232 Relay Controller
More >>
$446.00
Order this Device
R125DPDTR1210PROXR
12-Channel 5A DPDT Relay + 12-Channel 10A SPDT RS-232 Relay Controller
More >>
$476.00
Order this Device
XR245
24-Channel 5A SPDT Expansion Relay Controller
More >>
$304.00
Order this Device
XR2410
24-Channel 10A SPDT Expansion Relay Controller
More >>
$364.00
Order this Device
ZADSR245PROXR
802.15.4 Wireless Relay Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$419.00
Order this Device
ZADSR2410PROXR
802.15.4 Wireless Relay Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$479.00
Order this Device
ZUXPSR245PROXR
802.15.4 Wireless Relay Controller Board 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
More >>
$419.00
Order this Device
ZUXPSR2410PROXR
802.15.4 Wireless Relay Controller Board 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
More >>
$479.00
Order this Device
UADSR245PROXR
USB Relay Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$411.00
Order this Device
UADSR2410PROXR
USB Relay Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$471.00
Order this Device
UXPSR245PROXR
USB Relay Controller 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
More >>
$411.00
Order this Device
UXPSR2410PROXR
USB Relay Controller 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
More >>
$471.00
Order this Device
BTADSR245PROXR
Bluetooth Wireless Relay Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$449.00
Order this Device
BTADSR2410PROXR
Bluetooth Wireless Relay Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$514.00
Order this Device
BTUXPSR245PROXR
Bluetooth Wireless Relay Controller Board 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
More >>
$454.00
Order this Device
BTUXPSR2410PROXR
Bluetooth Wireless Relay Controller Board 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
More >>
$514.00
Order this Device
FOADSR245PROXR
Fiber Optic Relay Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$444.00
Order this Device
FOADSR2410PROXR
Fiber Optic Relay Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$504.00
Order this Device
FOUXPSR245PROXR
Fiber Optic Relay Board 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
More >>
$444.00
Order this Device
FOUXPSR2410PROXR
Fiber Optic Relay Board 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
More >>
$504.00
Order this Device
ZADSR245PROXR_XSC
XSC Long Range Wireless Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$464.00
Order this Device
ZADSR2410PROXR_XSC
XSC Long Range Wireless Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$524.00
Order this Device
ZUXPSR245PROXR_XSC
XSC Long Range Wireless Controller 24-Channel 5 Amp SPDT + UXP Universal Expansion Port
More >>
$464.00
Order this Device
ZUXPSR2410PROXR_XSC
XSC Long Range Wireless Controller 24-Channel 10 Amp SPDT + UXP Universal Expansion Port
More >>
$524.00
Order this Device
ZADSR2410PROXR_ZBMESH
ZB ZigBee Relay Controller 24-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$479.00
Order this Device
ZADSR245PROXR_ZBMESH
ZB ZigBee Relay Controller 24-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
More >>
$419.00
Order this Device
ZUXPSR2410PROXR_ZBMESH
ZB ZigBee Relay Controller Board 24-Channel 10 Amp SPDT + UXP Universal Expansion
More >>
$479.00
Order this Device
ZUXPSR245PROXR_ZBMESH
ZB ZigBee Relay Controller Board 24-Channel 5 Amp SPDT + UXP Universal Expansion
More >>
$419.00
Order this Device

Customer Support
About National Control Devices
Tools and Resources
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.controlanything.com/