W&T connects
Interfaces for TCP/IP, Ethernet, RS-232, RS-485, USB, 20mA, glass and plastic fiber optic cable, http, SNMP, OPC, Modbus TCP, I/O digital, I/O analog, ISA, PCI

Web-IO 4.0 for mains power:

Switch 230V/16A over Ethernet


    • Web-IO 4.0 Digital 230V below
    • Web-IO 4.0 Digital 230V
    • Web-IO 4.0 Digital 230V wide
    • Web-IO 4.0 Digital 230V below
    • Web-IO 4.0 Digital 230V
    • Web-IO 4.0 Digital 230V wide

The new Web-IO 4.0 Digital, 1x230V In, 1xRelay Out monitors and switches mains voltages up to 230V over TCP/IP Ethernet. In the simplest case the Web-IO can be operated directly from the browser or conveniently using an app.

Thanks to MQTT and REST support IoT and Industry 4.0 applications become child’s play. Like all Web-IOs, the new model 57732 also supports proven industry protocols such as OPC and Modbus/TCP. Sending of e-mail messages, e.g. when there is a power failure, is just one of many possible applications.

If you would like to find out what else the Web-IO 4.0 can do, simply order a sample for testing with no obligation.


Become active!

  • Don’t guess!
    Now test at no charge:

    We will be happy to provide you with a Web-IO 4.0 Digital 230V for testing for 30 days at no charge.

  • Detailed information

    Find all the other information you need in the technical datasheet.
  • Ask for help

    If you can’t seem to find the solution to your problem, try calling:

    Frank Thiel
    Phone: +49 202/2680-110


Web-IO 4.0 in the control cabinet



Other products from the Web-IO product family solve a variety of problems from the realms of monitoring and control: in addition to network-based monitoring of digital switching states, analog signals and room climate values, they enable active access using various standard protocols.


Web-IO 4.0: I/O versatility in the network