In a connected world where Industry 4.0 and the Internet of Things (IoT) define the operations of various industries, powerful interfaces between hardware and network are essential. The Web-IO 4.0 Digital 12xIn, 8xRelay Out from Wiesemann & Theis fulfills exactly this role. With 12 digital switch inputs and 8 relay outputs, it combines precise signal processing with flexible control – fully network-capable via TCP/IP Ethernet.

This solution is specifically designed for scenarios where reliability, fast response times, and flexible integration are crucial. In addition to an intuitive web interface, modern protocols such as MQTT, OPC UA, and REST-API are available to seamlessly integrate the device into automation systems and cloud platforms. The combination of digital inputs with pulse counters and relay outputs offers engineers, IT administrators, and facility managers a wide range of applications.

The device is ideal for remote monitoring, building automation, and even home automation. Whether for controlling lighting, barriers, doors, or complex systems – through the combination of relay technology and modern network functions, it sets new benchmarks for flexibility and safety.

The following sections cover the technical specifications, practical benefits, and application possibilities of the Web-IO 4.0 Digital 12xIn, 8xRelay Out, as well as the advantages it offers in the context of industrial digitization.

Technical features: precise inputs and robust relay outputs

The twelve digital switch inputs operate on 24V technology and feature integrated 32-bit pulse counters that register signals such as switching operations or pulses with high precision. The eight relay outputs consist of seven potential-free changeover contacts (CO) and one potential-free normally open contact (NO), with a maximum switching voltage of 24V and a switching current of up to 2A. With coupling relays, voltages such as 110V or 230V can also be connected, allowing powerful loads such as motors or heating systems to be controlled.

The separation of signal paths protects connected systems from electrical interference. This ensures long-term and trouble-free operation in industrial environments as well as in sensitive building applications.

Operation via intuitive web interface

A key strength of the device is its user-friendly web interface, which clearly displays all switch inputs and outputs. This interface is available in both German and English and can be operated from desktop or mobile devices. It is optimized for smartphones, providing a significant advantage for mobile remote monitoring.

Through the web interface, relays can be switched directly, and inputs can be monitored in real time. For developers, the system offers access via HTTP requests, AJAX, or JavaScript, enabling integration of I/O data into custom applications. The so-called box-to-box function also allows 1:1 forwarding of switching signals between two devices – a particularly useful feature for cross-location control tasks.

Connectivity and protocol diversity

As a future-proof control module, the Web-IO 4.0 Digital supports a wide range of communication protocols. In addition to MQTT, OPC UA, and REST-API, it also supports SNMP V1/V2/V3, Modbus TCP, Syslog, and Sensobase. This variety makes it an ideal interface between classical building technology, industrial process control, and modern IoT architectures.

Direct interaction with I/O states is possible via TCP and UDP sockets, allowing for custom control and automation solutions. Logging of switching actions via FTP contributes to complete documentation – an advantage for quality management and compliance purposes.

Flexible alarm and notification functions

The device provides up to 30 freely configurable actions that can be automatically triggered by changes in inputs or outputs. These include email notifications, SNMP alarms, and the direct switching of internal or external outputs. Such features are indispensable in critical scenarios, as they enable immediate actions in the event of malfunctions or security incidents.

Data storage and accurate timestamps

An integrated data logger records all switching operations and status changes over extended periods – from seven weeks to twenty years, depending on the logging frequency. Exports can be generated as Excel files, via FTP, or as email attachments. The internal clock is battery-backed and can be synchronized via a time server to ensure accurate timestamps for every record.

Application areas from industry to smart home

• Industrial automation: control of machines, fault reporting, and operational data collection.
• Building automation: control of lighting systems, doors, and barriers.
• Home automation: comfort enhancement through automatic lighting, heating, and shutter control.
• Remote monitoring: keeping sites under online surveillance at all times.
• Machine data acquisition: recording production processes for evaluation and optimization.

Power supply and compliance

The power supply is provided either via Power-over-Ethernet (PoE) or conventionally through 12–24V DC screw terminal connections. PoE enables operation without a separate power line, making it ideal for network environments with the necessary infrastructure. The device complies with relevant EMC and safety standards, including EN 61000-6-2 and EN 55032, and is designed for reliable operation in both industrial and office environments.

Robustness and long-term operation

Designed for continuous operation and backed by a five-year warranty, the Web-IO 4.0 Digital 12xIn, 8xRelay Out represents a long-term investment. DIN rail mounting allows easy integration into existing control cabinets, while its construction withstands demanding environmental conditions.

A versatile all-rounder for professional control

With its combination of 12 digital inputs, 8 relay outputs, and comprehensive network connectivity, the Web-IO 4.0 Digital from Wiesemann & Theis is a powerful tool for users requiring reliable remote control and monitoring. Support for Industry 4.0 standards, ease of operation, and robust hardware make it an ideal solution for businesses, public institutions, and private users with demanding automation and security requirements.