USB Relay Controller with High Power Relays

  • Industrial Quality USB Relay Controllers
  • Available with 1, 2, 4, or 8 On-Board Relays
  • Available with 20 or 30-Amp Relays
  • UpTo 8 Analog Inputs or Digital IO
  • ProXR Command Set Used by Industry for Many Years
  • Supports Windows, Mac, Linux, and Android
  • Supports LabVIEW and Visual Studio
  • Virtual COM Port Communications
  • Use Qatalytic Base Station Software to Learn Commands
  • Analog Digital Inputs Ideal For Data Acquisition applications
$ 131.00
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USB Relay Devices from Qatalytic

Our USB Relay products make it easy for computers of all types to control relays and monitor analog inputs.  USB Relay boards allow you turn relays on or off, flash relays continuously, control relays for a duration of time, and control relays in groups using a cross-platform compatible USB interface.  Qatalytic ProXR Lite series controllers are a widely adopted standard used by industry for many years.  Equipped with your choice of 1, 2, 4, or 8 on-board relays, the ProXR Lite series USB Relays suit the needs of most of our customers.  Integrated Analog to Digital Converters may be used to manually control the relays, or they may be used to read external sensors.  Equipped with 8 or 10-Bit resolution, the ADC built into Qatalytic USB Relays add tremendous flexibility for various application requirements.

This device includes a Qatalytic USB Interface module which will mount as a Virtual COM port on your computer.  Simply Open the COM port at 115.2K Baud and start communicating.  The USB interface is compatible with all Windows, Linux, Mac, and Android operating systems.  Most systems do not require a driver; however, we use FTDI interface chips in our products and drivers are available from their website if required for your system (

Getting Started with a Qatalytic USB Relay Module

Start by downloading Base Station at  Plugin one of our USB relay boards and run Base Station.  This software tool is designed to teach you all the features built into your controller and provide you with example commands.  Qatalytic USB Relays mount as a virtual COM port on your PC.  Simply choose the new COM port and click OK to begin communicating with the USB Relay board.  Base Station was written for Windows using Visual Studio (source code available).  Base Station shows you all the commands you need for controlling relays and monitoring external sensors.

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