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

Press Release July 2019

W&T Web-IO 230V:

Switch up to eight 230V circuits over the network

Wiesemann & Theis GmbH is expanding the range of network-based 230V remote switches with two products having potential-free normally open and change-over contacts for load currents up to 16 A.

The "Web-IO 4.0 230V Relay 1xNO, 1xCO" switches one normally open and one change-over contact with up to 16 Ampere. Its big brother, the "Web-IO 4.0 230V Relay 4xNO, 4xCO" switches four normally open and four change-over contacts with up to 6 A per channel.

The industrial-grade network relays are installed on 35mm DIN rails. They can be queried and controlled over the network. In addition to the web interface and apps for iOS and Android, various communication protocols are available for data access: Modbus/TCP, OPC, MQTT and REST support insertion into Industry 4.0 and SCADA applications. Integration into any other network products is possible using TCP, UDP, SNMP and FTP.

The Web-IOs satisfy high security requirements. The individual network services can be activated independently of each other. You can specify for any mode which outputs are allowed to be switched. An overview page provides information about active services and assigned channels. Access to the web interface and sending of email are TLS-encrypted if desired.

The Web-IO with one normally open and one change-over contact (#57832) is available now for a net price of 198.00€. The model with four change-over and four normally open contacts (#57838) is 298.00€. Industrial users can test the products for four weeks with no obligation.

Wiesemann & Theis was founded in 1979 by Reinhard Wiesemann and Rüdiger Theis. The company produces microcomputer and network technology products from their location in Wuppertal with 50 employees. In 2001 Wiesemann & Theis introduced the Web Thermometer, the first temperature sensor to have a network interface which is compatible with Industry 4.0 and the Internet of Things, representing more than 15 years of experience at this industrial forefront.

More information:

  • Wörter: 286
  • Zeichen: 2107
  • Embargo: none


  • 57832 Thumbnail
  • 57838 Thumbnail


#57832 (W&T) Web-IO 4.0 230V Relay 1xNO, 1xCO

#57838 (W&T) Web-IO 4.0 230V Relay 4xNO, 4xCO