In today’s connected world, precise control and monitoring systems are an essential part of efficient processes in industry, building technology, and home automation. The Wiesemann & Theis Web‑IO 4.0 Digital with its 4x In/Out channels sets new standards in this field. This device offers four freely configurable digital inputs and outputs in 24 V technology and combines cutting‑edge protocol support such as OPC UA, MQTT, and REST with an exceptionally user‑friendly interface. Its flexibility makes it an ideal tool for applications ranging from simple signal acquisition to complex Industry 4.0 control systems within the IoT environment.

One of the greatest strengths of the Web‑IO 4.0 Digital is its ability to adapt to a wide range of scenarios. Whether it’s used in building automation for lighting and access control, in process monitoring for capturing and analyzing machine states, or in home automation to improve comfort and optimize energy consumption – this system stands out for its versatility. It can be seamlessly integrated into existing control and monitoring infrastructures via the network.

The possibilities that arise from these network‑enabled switching modules are extensive. Every application benefits from the direct web interface, which allows real‑time control and status display – even on mobile devices via smartphones. Integration into higher‑level systems via HTTP, HTTPS, AJAX, or JavaScript gives developers and system integrators maximum freedom when creating customized solutions.

In addition to control functions, the Web‑IO 4.0 Digital excels through extensive alarm and notification capabilities. Up to 30 actions can be defined to trigger automatically when a state change occurs – for instance, sending an SNMP message, dispatching an email, or activating other Web‑IO devices. This rapid responsiveness is particularly valuable in safety‑critical systems such as fault monitoring or the remote supervision of sensitive installations.

Technical Performance in Detail

The Web‑IO 4.0 Digital 4x In/Out provides four switching channels that can each be configured as either digital inputs or outputs. When used as an output, each channel delivers up to 500 mA, is short‑circuit proof, and operates on 24 V technology. Through external coupling relays, the device can also switch higher voltages such as 110 V or 230 V. In input mode, a 32‑bit pulse counter is integrated for precise signal sequence detection – ideal for capturing production cycles, counter readings, or flow rates.

Setup is simple through the user‑friendly web interface available in German and English. The interface is mobile‑optimized, allowing operation via smartphone as well. Additionally, the Web‑IO can be accessed directly via HTTP requests or TCP/UDP sockets and integrated into external applications, visualizations, or cloud services.

Protocol Variety and Industry 4.0 Integration

The software architecture of the Web‑IO 4.0 Digital is based on a comprehensive range of modern interfaces. In addition to OPC UA and MQTT, which are widely used in IoT and Industry 4.0 environments, it supports SNMP (V1, V2c, V3) and Modbus TCP. REST and HTTP interfaces allow communication with web services, while Syslog and Sensobase connections enable logging and database integration. Switching logs can also be stored long‑term via FTP.

Data Storage and Long‑Term Archiving

The integrated data logger can store state changes and switching operations over extended periods – configurable from 7 weeks up to 20 years. Data can be exported as Excel files, sent as email attachments, or uploaded via FTP. An internal, battery‑buffered clock guarantees precise timestamps, which can be synchronized with an NTP time server if required. This makes the device suitable for applications requiring audit‑proof documentation.

Versatile Application Areas at a Glance

Typical areas of use include:

• Automation in production systems
• Monitoring and control in building automation
• Control of barriers, gates, and access systems
• Home automation for lighting or heating
• Real‑time machine data acquisition
• Use in energy management
• Integration with IoT services and cloud platforms

Reliability & Standards

The Web‑IO 4.0 Digital is designed for continuous operation, meets key EMC and safety standards, and is highly resistant to interference according to EN 61000‑6‑2. Its 12–24 V DC power supply ensures flexible implementation in a variety of environments. The robust construction and DIN‑rail mounting capability make it a durable component in any control solution.

With a five‑year warranty, Wiesemann & Theis underscores its commitment to quality and reliability. The device is designed for long‑term availability, supports firmware updates, and is fully prepared for future industrial and IoT requirements.