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National Control Devices, LLC

24-Channel 10A SPDT Expansion Relay Controller

XR2410 XR Expansion Board

24-Channel 10A SPDT Expansion Relay Controller

XR Expansion Board
XR Series Expansion Relay Boards add Relays to ANY NCD Device with an XR Expansion Port!
Compliance to ROHS Standards

Control this Device Over the Internet
Signal Switch Compatible

24-Channel 10A SPDT Expansion Relay Controller


This movie will explain the different expansion options that can be used with our controllers.


This video is a basic introduction to the world of Computer Controlled Switching and Relays in general.
Also read our "Introduction to Computer Control" Article.


This video will show you what Induction is and how to use Capacitors to Suppress it.
Also read our Article on Induction Suppression.


  • Onboard Relay Status LEDs
  • Screw Terminal Connectors
  • Available with SPST, SPDT, DPDT, High-Current and Signal Switching Relays
  • Power LEDs
  • 2.1mm Power Connector
  • Optional Power Supply
  • Includes 6" XR Expansion Cable
XR Expansion Board

This Product:

Ratings AC DC
Voltage 240 24
Amperage 10 10
24-Channel 10A SPDT Expansion Relay Controller
Stock#: XR2410  
1-9 $419.00

Related Products:

24-Channel 5A SPDT Expansion Relay Controller
Stock#: XR245 $350
National Control Devices, LLC
Since October, 1995

XR Expansion Relay Banks

XR Relay Expansion Controllers add a large variety of relay switching capabilities to an existing NCD device!

XR Expansion Ports are used to add banks of external relays to an NCD device.  As we continue to develop new devices, a modular architecture will be implemented, offering the greatest amount of user flexibility.  Separating the brawn from the brains allows us to continue to develop more intelligent controllers without making existing hardware obsolete.

Our Line of XR Expansion Relay Controllers add unlimited computer controlled switching potential, using a simple, modular upgrade path.  From low power signal switching to high current, high voltage control, we offer an XR Expansion controller that will meet your switching requirements.  Available with Single Pole Double Throw (SPDT) and Double Pole Double Throw (DPDT) relays, Open Collector Outputs (OC), and 8, 16, 24, or 32 outputs per expansion board.

Above: A 4-channel ProXR Series Controller (bottom) shown with an 8-channel expansion board attached.  Simply chain the XR Expansion Modules, one after another, to add additionl relays to any ProXR board up to 256 relays.
(click picture to enlarge)

Controlling XR Expansion Banks

XR Expansion Boards have no on-board brains.  They are entirely reliant on the brains of a "master" device.  A master device is an NCD controller with an XR expansion port and a microprocessor of some kind.  Some master devices are wireless, and some master devices have digital I/O and analog to digital conversion capabilities.  Some master devices also have on-board relays.  When you run out of relays, just plug in an XR expansion controller that is equipped with the kind of relays you need.

The product manual for various NCD master devices will refer to a group of 8 relays as a relay bank.  XR Expansion Modules count as 1, 2, 3, or 4 banks, depending on how many relays are on board (8, 16, 24, or 32).

As you continue to chain XR relay expansion controllers onto an XR expansion port, the total number of available relay banks will increase.  Each master device is only capable of controlling a fixed number of relay banks.  You should review the product manual of the master device you are using to determine the maximum number of supported relays banks.  This modular expansion approach will allow you to chain relays of all kinds to a single NCD device.

Linking XR Expansion Boards Together

XR Expansion Boards include a 6" ribbon cable with a keyed connector, used to link the expansion controller to an NCD device.  At the other end of the relay expansion board is an XR Pass-Through connector, allowing you to chain additional relay banks.

24-Channel 10A SPDT Expansion Relay Controller

Product Code: XR2410
24-Channel 10A SPDT Expansion Relay Controller

Quantity in Basket: None
Code: XR2410
Price: $419.00
Shipping Weight: 3 pounds