Web-IO 4.0 230V relay 1xNO, 1xCO

Precise Remote Control with the Web-IO 4.0 230V Relay 1xNO, 1xCO from Wiesemann & Theis

In modern industry and building automation, precise control of switching signals is essential for optimizing processes and ensuring operational safety. The Web-IO 4.0 230V Relay 1xNO, 1xCO from Wiesemann & Theis is a compact, network-enabled device that provides two bistable relay outputs (one normally open contact and one changeover contact) for 230V mains voltage. With an intuitive web interface, comprehensive network services, and protocols such as OPC UA, MQTT, and REST, it is ideally suited for Industry 4.0 and the Internet of Things (IoT). This article highlights the technical features, possible applications, and advantages of this specialized device, developed for remote control, building automation, and smart home applications.

Powerful Control of 230V Switching Signals

The Web-IO 4.0 230V Relay 1xNO, 1xCO provides two switching outputs via bistable relays. The first output is a potential-free normally open contact (NO), the second is a potential-free changeover contact (CO), both designed for 230V mains voltage. The relays support switching currents up to 16 A, enabling control of devices such as lighting, motors, heating systems, and other 230V consumers. The bistable technology ensures that the relay retains its switching state even without continuous power, which increases energy efficiency. These properties make the device ideal for applications such as remote control, process monitoring, and machine data acquisition (MDA), where reliable and precise control of 230V signals is required.

Intuitive Operation and Network Connectivity

The Web-IO 4.0 230V Relay is very user-friendly thanks to an intuitive web interface that can be switched between German and English. Users can control the relay outputs directly via the web interface, with the bistable relays ensuring fast and reliable switching. The interface is optimized for smartphones, allowing remote operation even while on the go. Support for HTTP and HTTPS ensures secure communication. Developers can access the current state of the relays via HTTP requests, AJAX, or JavaScript to integrate the device into other web pages or applications. The box-to-box function enables 1:1 forwarding of switching signals via the network, simplifying remote control across multiple locations. These connectivity options make the device ideal for network-based control in connected environments.

Flexible Alarm and Notification Functions

The Web-IO 4.0 230V Relay offers a variety of alarm and status reporting options. Up to 30 actions can be configured to trigger automatically when changes occur on the relay outputs. These include email notifications, SNMP alarms (SNMP traps V1, V2, V3), switching its own outputs, controlling the outputs of another Web-IO, or sending HTTP requests to control third-party devices. These features are especially useful in critical applications such as remote monitoring or fault detection, where fast responses to switching events are needed. The ability to send status messages via email supports documentation and analysis of operations, which is essential for audits and quality management.

Seamless Integration into Industry 4.0 and IoT

The Web-IO 4.0 230V Relay is well equipped to meet the demands of Industry 4.0 and the Internet of Things. It supports modern protocols such as OPC UA, REST, and MQTT, enabling seamless integration into automation systems and IoT platforms. AMQP support is available on request. Additional interfaces such as SNMP V1, V2c, V3, Modbus TCP, OPC DA, Syslog, and Sensobase (ODBC database integration) allow integration into existing systems and infrastructures. Developers can access relay states directly via TCP and UDP sockets (client and server) for the development of custom solutions. FTP support enables logging of switching actions, improving process traceability. These connectivity features make the device a future-proof solution for building automation, smart homes, and industrial applications.

Data Logging and Time Management

The Web-IO 4.0 230V Relay includes an integrated data logger that records switching actions and state changes. The memory can store data from a minimum of 7 weeks up to 20 years, depending on the selected storage interval (15 seconds to 1 hour). The data can be exported in various formats such as FTP, Excel files, or email attachments, simplifying post-processing. An internal battery-buffered clock ensures precise timestamps that can be optimized using time server synchronization. These functions ensure reliable documentation and analysis, which are especially beneficial in process monitoring and machine data logging.

Versatile Applications

The Web-IO 4.0 230V Relay 1xNO, 1xCO is designed for a wide range of applications. In remote monitoring and fault detection, it controls devices such as lighting, motors, or heating systems and reports state changes. In building automation, it enables switching of devices such as lights, gates, or barriers and supports cross-location control. In smart home applications, it automates lighting or heating systems to enhance comfort and energy efficiency. In industrial environments, it is suitable for process monitoring and visualization as well as machine data acquisition (MDA) to optimize production processes. The bistable relays ensure reliable switching, even in the event of a power outage. Further application examples include access control systems and gate automation.

Flexible Power Supply and Standards Compliance

The Web-IO 4.0 230V Relay is powered via an external 230V AC, 50 Hz power supply using a screw terminal. This configuration is ideal for applications operating directly from mains voltage. The device complies with standards for office and industrial environments and offers high immunity in accordance with EN 61000-6-2, as well as low emissions complying with EN 55032:2015 + A1 Class B, EN 61000-3-2, and EN 61000-3-3. These features ensure reliable and trouble-free operation even in demanding environments.

Durability and Reliability

The Web-IO 4.0 230V Relay is designed for continuous operation and comes with a five-year warranty. Its robust construction and support for DIN rail mounting make it ideal for use in industrial settings. The internal clock, buffered by a battery, ensures precise timekeeping and can be synchronized with a time server. The bistable relays enhance reliability as they retain their switching state even in the event of a power failure. These features underscore the device's durability and reliability, even under demanding conditions.

An Indispensable Tool for Remote 230V Control

The Web-IO 4.0 230V Relay 1xNO, 1xCO from Wiesemann & Theis is a compact and powerful solution for network-based control and remote switching of 230V signals. With its two bistable relay outputs (normally open and changeover contacts) and full networking capabilities, it offers a flexible solution for building automation, smart home technology, process control, and machine data acquisition. Support for modern protocols such as OPC UA, MQTT, and REST, together with an intuitive web interface, make it ideal for Industry 4.0 applications. Whether controlling lights, motors, or barriers, or logging switching events, this device is an essential tool for professional users.