Web-IO 4.0 Analogue 0-20mA

Precise Measurement and Control with the Web-IO 4.0 Analog 0-20mA from Wiesemann & Theis

In modern industry and automation technology, the precise acquisition, transmission, and control of analog signals are crucial for optimizing processes and ensuring operational safety. The Web-IO 4.0 Analog 0-20mA from Wiesemann & Theis is a versatile, network-capable device offering two channels for analog 0/4-20mA signals, which can be configured either as inputs or outputs. With an intuitive web interface, comprehensive network services, and protocols such as OPC UA, MQTT, and REST, it is perfectly suited for Industry 4.0 and the Internet of Things (IoT). This article highlights the technical features, application areas, and advantages of this specialized device designed for remote monitoring, data logging, and network control.

Flexible Acquisition and Control of Analog Signals

The Web-IO 4.0 Analog 0-20mA features two channels that can be configured either as current inputs or outputs for 0/4-20mA signals. As inputs, the channels support both active and passive 0/4-20mA signals, enabling the connection of sensors such as temperature, pressure, or flow sensors. As outputs, they provide precise 0/4-20mA signals for controlling actuators like valves or controllers. This flexibility makes the device ideal for applications such as process monitoring, machine data acquisition (MDA), and remote control where analog signals need to be measured, transmitted, or output. The active current input and user-specific scalable display enable precise and customizable data acquisition.

Intuitive Operation and Network Integration

Operation of the Web-IO 4.0 Analog is extremely user-friendly thanks to an intuitive web interface, available in both German and English. Users can monitor analog values and trends directly in the browser and control outputs via direct input or socket commands. The interface is optimized for smartphones, allowing monitoring and control on the go. Support for HTTP and HTTPS ensures secure communication. Developers can access current values directly via HTTP requests, AJAX, or JavaScript to integrate the device into websites or applications. The Box2Box function enables tunneling of analog signals over the network between two Web-IO devices, allowing the network to serve as an extension for analog signals. These connectivity options make the device ideal for network control in connected environments.

Flexible Alarm and Reporting Functions

The Web-IO 4.0 Analog offers extensive options for alarms and reporting. Up to 12 alarms can be configured, triggered automatically when defined thresholds are exceeded or input states change. These include email notifications for alerting or reporting purposes, SNMP alarms (SNMP traps V1, V2, V3), and switching the outputs of another Web-IO. These functions are especially useful in critical applications such as remote monitoring or fault detection, where rapid response to value changes is essential. The ability to send reports via email supports documentation and analysis of measurement data, which is vital for audits and quality management.

Seamless Integration into Industry 4.0 and IoT

The Web-IO 4.0 Analog is fully equipped for the requirements of Industry 4.0 and the Internet of Things. It supports modern protocols such as OPC UA, REST, and MQTT, enabling easy integration into automation systems and IoT platforms. Additional interfaces such as SNMP V1, V2c, V3, Modbus TCP, OPC DA, Syslog, and Sensobase (database integration via ODBC) allow connection to existing systems and databases. Developers can access data directly via TCP and UDP sockets (client and server) to create custom solutions. FTP support enables logging of measurement data, and integration into the W&T Cloud allows global documentation and access to data. These connectivity features make the device a future-proof solution for industrial and automated applications.

Powerful Data Logger for Measurement Data

The Web-IO 4.0 Analog includes a built-in data logger that records measurement values for a period ranging from at least 150 days up to a maximum of 99 years, depending on the selected storage interval (15 seconds to 60 minutes). Data can be exported in various formats such as FTP, Excel files, or email attachments, facilitating further processing. Additionally, measurement data can be documented online in the W&T Cloud and accessed worldwide. An internal battery-buffered clock provides precise timestamps, which can be optimized through synchronization with a time server. These functions ensure reliable documentation and analysis of measurement data, which is particularly beneficial for process monitoring and machine data acquisition.

Versatile Application Possibilities

The Web-IO 4.0 Analog 0-20mA is designed for a wide range of applications. It allows the connection and monitoring of sensors with 0/4-20mA output, such as temperature, pressure, or flow sensors, and the control of analog actuators such as valves or controllers via the network. In Box2Box mode, analog signals can be tunneled over long distances, using the network as an extension for measurement and control signals. In remote monitoring and fault detection, it monitors values and reports deviations. In building and home automation, it controls analog systems like heating or air conditioning. In industrial environments, the device is suitable for process monitoring and visualization, as well as for machine data acquisition (MDA) to optimize production processes. Other possible uses include environmental data logging or plant control.

Flexible Power Supply and Standards Compliance

The Web-IO 4.0 Analog is primarily powered via Power-over-Ethernet (PoE), either through phantom power over data pairs or through unused wire pairs. Alternatively, an external power supply can be used. This flexibility facilitates installation in various environments. The device complies with standards for office and industrial environments and offers high immunity to interference in accordance with EN 61000-6-2 and low emissions according to EN 55032:2015 + A1 Class B, EN 61000-3-2, and EN 61000-3-3. These properties ensure reliable and interference-free operation, even in demanding environments.

Please note: A power supply unit is NOT included in the delivery.

Durability and Reliability

The Web-IO 4.0 Analog is designed for continuous operation and comes with a five-year warranty. Its robust construction and DIN rail mounting make it ideal for use in industrial environments. The internal clock, buffered by a battery, ensures precise timekeeping, optimized by synchronization with a time server. These features emphasize the durability and reliability of the device, even under challenging conditions.

An Essential Tool for Analog Signal Processing

The Web-IO 4.0 Analog 0-20mA from Wiesemann & Theis is a powerful and versatile solution for network-based control, measurement, and logging of analog 0/4-20mA signals. With its two flexibly configurable channels, Box2Box mode, and comprehensive network capabilities, it offers a flexible solution for building automation, home automation, process monitoring, and machine data acquisition. Support for modern protocols such as OPC UA, MQTT, and REST, along with integration into the W&T Cloud, makes it ideal for the requirements of Industry 4.0. Whether for monitoring sensors, controlling actuators, or logging measurement data – this device is an indispensable tool for professional users.