Product was successfully added to your shopping cart.

Go to cart page

You have successfully subscribed to this product. You will receive an email when the product is in stock.

Ethernet relay card

Velleman VM204: Ethernet Relay Card

Velleman VM204

In stock

+ -

Free ground shipping on orders over $75.
More info...

Velleman VM204 Ethernet Relay Card

The Velleman VM204 is an Ethernet controlled board that allows you to connect to different devices and control them from anywhere you like. It features 4 relay outputs, 4 digital inputs, 1 analog input and an embedded webserver. You can control it with the Velleman PC software or use the free apps. Apps are available for Android® and iOS®. The VM204 can send you e-mails to let you know when the status of an input changes.


  • Power supply: 5 Vdc power supply needed (min. 500 mA) via USB B connector
  • Ethernet: 100 Mbit
  • Outputs: 4 relay outputs (30 V / 2 A rated)
  • Inputs:
    • 4 digital inputs (open collector compatible)
    • 1 analog input (6 V max.)
  • Ports:
    • UART port avaiable
    • SPI port available
  1. Be the first to review this product

Write Your Own Review

How do you rate this product? *





VM204 PC software
Includes the discovery software and the firmware upgrade tool.

Info Sheets

Overview of Velleman modules that are equal to D.I.Y Kits
This sheet is useful when you want to know which modules you could find in the do-it-yourself range of Velleman Kits and minikits.

Frequently Asked Questions

Q. What are the dimensions of this board?


The board is approximately 5.25 in.x 4 in. x 0.75 in.

Have a question?

* required fields

 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product