In the advanced world of automation and industrial digitization, the precise acquisition, control, and monitoring of switching signals have become a central element of modern operations management. The Web-IO 4.0 Digital 16xIn/Out from Wiesemann & Theis exemplifies this development. It combines the reliability of traditional control technology with the modern requirements of Industry 4.0 and the Internet of Things (IoT). With 16 freely configurable channels that can be used either as digital inputs or outputs, this network device offers exceptional flexibility for virtually any application scenario.

Where once individual control lines were required, Ethernet-based communication now takes over this role. By supporting protocols such as MQTT, OPC UA, and REST-API, the device can be integrated into a wide variety of system environments. The combination of hardware robustness and software intelligence makes the Web-IO 4.0 Digital an important control module for buildings, industrial plants, and IT infrastructures. It offers both simple manual control options via an intuitive web interface and comprehensive automation through network commands and scripting.

With its high signal quality and clearly structured user interface, the device enables precise real-time condition monitoring. Whether in building automation, machine monitoring, or industrial surveillance systems – wherever digital signals need to be processed reliably, the Wiesemann & Theis solution stands out for its stability, security, and scalability.

This article highlights the detailed technical features, application-oriented use cases, and the reliability and longevity of the Web-IO 4.0 Digital 16xIn/Out. Especially in combination with IoT platforms, industrial data acquisition, and automated control tasks, it becomes clear why this device has established itself as a standard component in numerous system architectures.

Technical foundation: 16 flexible channels for maximum adaptability

The core of the Web-IO 4.0 Digital 16xIn/Out consists of 16 universal channels that can be individually configured as inputs or outputs. Each channel operates at 24V and is short-circuit protected. As outputs, the channels can drive currents up to 250 mA, while as inputs, precise signal detection is ensured by integrated 32-bit pulse counters. These counters are capable of detecting high-frequency pulses, which is particularly beneficial for machine monitoring, production counting, or flow measurement.

The ability to switch external voltages up to 230V via relays greatly expands the range of applications. Both low-voltage control systems and mains-powered installations can be managed. In addition, the device features protective mechanisms against electrical interference and galvanic isolation, maximizing reliability in industrial environments.

User-friendly operation via modern web interface

A key advantage of the device lies in its thoughtful and intuitive web interface. Operation can be switched between German and English, making control significantly easier for both technicians and developers. All channels can be individually configured, controlled, and monitored in real time. The current switching state is immediately visible, and changes can be applied without delay.

For mobile applications, the user interface has been designed responsively so that it automatically adapts to different devices. Remote control via tablets or smartphones is therefore conveniently possible. Security is a top priority: support for HTTPS ensures an encrypted connection that protects against unauthorized access. Companies subject to strict IT security standards benefit from this robust communication architecture.

Network integration and interface diversity

As a fully network-capable device, the Web-IO 4.0 Digital 16xIn/Out operates via standard Ethernet connections and supports a wide range of modern communication protocols. These include OPC UA, MQTT, REST-API, Modbus TCP, SNMP, Syslog, and Sensobase. This diversity enables integration with virtually any control software, cloud or IoT platform, or process visualization system.

Particularly noteworthy is the MQTT support, which directly integrates the device into IoT networks. With OPC UA, real-time communication within control systems is ensured, while the REST-API allows developers to flexibly implement the device in their own web solutions. In addition, the so-called box-to-box function enables 1:1 signal transmission across network boundaries – a crucial feature for interdisciplinary control tasks in large-scale facility complexes.

Real-time alarm management and fault reporting

The Web-IO 4.0 Digital provides extensive alarm functions that can respond immediately to events. When signals change, up to 30 different actions can be automatically executed. These include email notifications, SNMP traps, switching defined outputs, or executing HTTP requests. These automated reactions are particularly relevant for fault reporting and preventive system monitoring.

Since information can be transmitted via email or network protocols to external systems, the device is also suitable for condition evaluation and documentation. This reduces the need for manual inspections while ensuring continuous monitoring. In safety-critical areas, this is a significant advantage for minimizing downtime and effectively safeguarding production processes.

Data logging and time synchronization

The integrated data logger provides a reliable way to record all state changes and switching operations over long periods. Depending on the configuration, data can be stored for periods ranging from seven weeks to twenty years. Exports can be generated in formats such as Excel, CSV, or via automated FTP upload. This allows archived switching logs to be used flexibly for evaluations or audits.

The internal real-time clock is battery-backed, ensuring precise timestamps. Regular synchronization with NTP or external time servers maintains an exact time base – an essential requirement for the accurate recording of historical process data. This precision is especially important in machine data acquisition, such as calculating operating times or performing reliability analyses.

Application fields from industry to building automation

The Web-IO 4.0 Digital 16xIn/Out covers a wide range of applications. In industrial settings, it serves as a data interface between machines and control systems. In building automation, it handles control tasks for lighting, ventilation, or access systems. The device also finds use in building services engineering, for example in managing heating systems or door drives. Its flexible channel structure allows mixed control architectures to be implemented – a major advantage when different signal types need to be combined.

In remote monitoring, the device provides a secure way to report critical switching processes or malfunctions in near real time. This ensures reliable connectivity between distributed locations or external installations. Integration into existing IT systems is straightforward thanks to standard protocols, minimizing installation effort and reducing long-term maintenance costs.

Robustness, compliance, and power supply

The robust housing and DIN rail mounting design make the Web-IO 4.0 Digital 16xIn/Out a professional solution for control cabinets and technical centers. The power supply operates via 12 to 24 V DC inputs. Additionally, the device meets international standards such as EN 61000-6-2 and EN 55032:2015 + A1, as well as EMC guidelines for reliable operation even in environments with high electromagnetic exposure. This ensures interference-free performance in both industrial and office settings.

Long-term operation and reliability

Wiesemann & Theis places great emphasis on quality and longevity for all Web-IO products. The device is designed for continuous operation and comes with a five-year factory warranty. The internal hardware architecture is built to maintain performance even during long-term use. Its modular design ensures long-term spare part availability, making the investment a sustainable one.

A future-proof tool for automation and control

The Web-IO 4.0 Digital 16xIn/Out is more than just an IO gateway – it is a flexible link between digital control and connected communication. Through modern network protocols, ease of operation, and robust technical design, it bridges the gap between sensor technology, actuation, and process management. Companies focused on sustainable automation benefit from a solution that is both technically sophisticated and economically efficient.

Whether for process monitoring, machine data acquisition, fault reporting, or building automation – this device impresses with versatility and durability. It combines classic switching logic with internet-based communication, paving the way for the era of intelligently networked control systems.