control anything... anywhere
National Control Devices, LLC

All Interfaces and Series

All Interfaces and Series

All Interfaces

Select a Communication Interface Below


Computer Controlled Relay

Our Computer Controlled Relays are equipped with ProXR firmware built into the board that will allow you to Control one relay at a time, a bank of relays or all relays at once with manual and automatic refreshing command set.  The Ethernet Relay board connects to the Ethernet port of your local network hub, allowing computer controlled switching from anywhere. 

Relay Board Options

The Relay Boards are available in ProXR versions meaning that they can be expanded to accommodate up to 256 relays through one port  There are nine different wired or wireless interfaces to send commands to the board.  Choose an interface that fits your application below.

Computer Controlled Relay
Choose an interface that fits your needs
Extremely Powerful, Very Reliable Relay Board!

All the Features You Need

  • Relays installed on a Circuit Board
  • Expandable to 256 Relays
  • Ten Communications Interfaces
      - Wired, Wireless & Network Options
      - Most Interfaces Mount as Virtual COM Port
  • Industry Leading Command Set
      - Send Specific Commands to Trigger Relays
      - Use a Computer, Tablet or Smart Phone
      - Trigger Any or All Relays
  • Base Station Software
     - Point & Click Interface
     - Read Sensor Levels
     - Read Status of Relays
     - Manually Trigger Relays
omputer controlled Relay

Computer Controlled Relay
Send commands to trigger a relay, a bank of relays or all relays at once, expandable to 256 relays!
Choose an Interface Below

Selecting an Interface

How would you like to send commands to the board?  Below you will find all the interfaces that are available.  Each section is broken down by the interface installed on the board.  The interface will determine how you will communicate to the board with your computer.  You will send your commands to the board using the interface you select here!  Choose the interface you require and click that link.  This will bring you to a page where you will select a board based on amperage of the relay installed.