In the modern world of automation technology, precise control and monitoring devices play a decisive role. Companies across a wide range of industries increasingly rely on digital solutions to efficiently control complex processes, enhance operational safety, and optimize productivity. The Web-IO 4.0 Digital 12xIn, 12xOut from renowned manufacturer Wiesemann & Theis is among the most versatile network-enabled devices in this field. It is specifically designed for applications where reliability, flexibility, and easy integration into modern networks are of great importance.

With 12 digital switch inputs and an equal number of digital switch outputs, addressable via TCP/IP Ethernet, the device offers numerous application possibilities in building automation, industrial process control, and remote monitoring. Thanks to modern interfaces and communication protocols such as OPC UA, MQTT, and REST-API, it is ideally suited to the requirements of Industry 4.0 and the Internet of Things (IoT). An intuitive web interface enables direct control and status monitoring, whether from a PC, tablet, or smartphone – locally as well as over long distances.

The use of such digital I/O devices is a game-changer for many companies. With flexible configuration and the ability to transmit signals over the network, new avenues for process optimization open up. Its range of applications includes machine data collection, fault signal detection, and intelligent building automation. The Web-IO 4.0 Digital combines modern communication technology with robust hardware to operate reliably even in demanding environments.

In this article, we take a detailed look at the technical properties, functional advantages, and the wide variety of application possibilities offered by the Web-IO 4.0 Digital 12xIn, 12xOut from Wiesemann & Theis. We also examine practical scenarios, integration options, and long-term benefits to clarify the role of this device in the era of connected automation.

Technical features for maximum versatility

The 12 switch inputs of the Web-IO 4.0 Digital operate in 24V technology and feature integrated 32-bit pulse counters. This enables precise detection of events such as button presses, signal changes, or pulses. The 12 switch outputs are also designed for 24V technology and can drive currents up to 500 mA. Thanks to short-circuit resistance and the option of switching higher voltages – such as 48V, 110V, or 230V – via relays, the device is suitable for both low-voltage and mains applications.

These technical properties are particularly valuable in industrial applications because they allow direct control of devices such as pumps, motors, barriers, or lighting systems. In private or commercial buildings, systems such as heating, ventilation, or roller doors can be controlled. The high number of available inputs and outputs makes the device ideal for scenarios with complex switching and control requirements such as process monitoring or use as an alert system for faults and critical conditions.

User-friendly operation and network capability

The web interface of the device is clearly structured and easy to use. It can be switched between German and English and is optimized for use on mobile devices. Users can control switch outputs directly via the browser while viewing real-time status information of the inputs. This makes the Web-IO 4.0 Digital perfectly suited for IT administrators, technicians, and building managers who wish to monitor operations remotely.

Secure communication between device and user is ensured through support for HTTP and HTTPS. Developers can also programmatically access I/O states via HTTP requests, AJAX, or JavaScript. The so-called box-to-box function allows direct transmission of switching signals between two devices over a network. This is particularly useful when input and output components are located at different sites.

Powerful alarm and notification systems

The Web-IO 4.0 Digital offers a variety of alarm and notification options that can be individually configured. Up to 30 actions can be defined to respond to status changes at inputs or outputs. These include sending email notifications, SNMP traps (version 1, 2, 3), direct switching of local or remote outputs, as well as HTTP requests to control third-party devices. Such options are important not only for security but also for documentation of operations.

Integration into Industry 4.0 and IoT systems

With interfaces such as OPC UA, MQTT, and REST-API, the device meets all requirements of modern automation and IoT platforms. It also supports protocols such as SNMP, Modbus TCP, Syslog, and Sensobase, ensuring seamless integration into existing IT infrastructures. Developers can implement their own applications via TCP and UDP sockets, while FTP support allows switching signal data to be logged and stored externally.

Durability, power supply, and standards compliance

The housing of the Web-IO 4.0 Digital is optimized for DIN rail mounting and is therefore ideal for control cabinets in industrial environments. The power supply is via an external 12–24 V DC source. Compliance with EN standards guarantees stable operation even in interference-prone environments. With a five-year warranty, Wiesemann & Theis underscores its commitment to quality and durability.

Practical application scenarios

• Building automation: control of lighting systems, blinds, ventilation, and heating systems.
• Remote monitoring: status control of machines at branch offices or remote locations.
• Industry 4.0: connecting production systems to central control systems.
• Fault reporting: communication of critical states to centralized maintenance teams.
• Machine data collection: recording of production cycles or operating times.

Data logging and time management

The device’s integrated data logger can record switching operations for periods ranging from 7 weeks to 20 years, depending on the logging frequency. This data can be provided in formats such as Excel, FTP export, or email attachments. A battery-backed real-time clock ensures precise time stamps, while synchronization with external time servers optimizes accuracy.

Whether as a component of complex process monitoring, for machine data collection, or in building automation – the Web-IO 4.0 Digital 12xIn, 12xOut is a universal tool for modern control and monitoring technology.