The Beckhoff EL3112 EtherCAT Terminal is a high-precision analogue input module designed for the acquisition of 0…20 mA current signals, the widely adopted standard in industrial measurement and control systems. With two differential input channels, the EL3112 enables accurate, noise-resistant data capture, making it ideal for process automation, machine monitoring, and advanced test environments.

By employing differential measurement technology, the EL3112 minimises the effects of electrical interference and ensures superior signal integrity. This is particularly important in industrial environments where noise from motors, drives, or switching equipment can distort analogue signals. The differential design allows the module to deliver reliable and consistent performance, even in challenging conditions.

The terminal offers 16-bit resolution, providing highly detailed digitisation of current signals. This high resolution ensures that even the smallest changes in process variables—such as temperature, pressure, or flow—can be accurately recorded and analysed. With its precision, the EL3112 is well suited for applications requiring fine control or monitoring of sensitive processes.

Supporting EtherCAT distributed clock technology, the EL3112 ensures precise time synchronisation across multiple I/O modules in a system. With synchronisation accuracy of << 1 µs, it guarantees that data from different channels and devices can be correlated with exact timing, an essential feature for motion control, coordinated process regulation, or multi-channel measurement setups.

The terminal’s internal resistance of approximately 85 Ω plus diode voltage ensures compatibility with standard current transmitters, providing stable operation while minimising loading effects. The input bandwidth depends on the filter configuration, enabling engineers to tailor the module’s response to the needs of their specific application—whether prioritising noise suppression or rapid updates.

Powered via the E-bus, the EL3112 integrates seamlessly into Beckhoff’s modular EtherCAT I/O system. This allows easy combination with other analogue, digital, and speciality terminals to create tailored automation solutions. Its compact design makes it suitable for space-conscious control cabinets, offering high functionality within a small footprint.

Typical applications include process automation, where the EL3112 records signals from industrial transmitters; machine automation, where it captures feedback from actuators and sensors; and test and measurement systems, where precision and synchronisation are essential. Its ability to deliver high-resolution, time-synchronised data ensures that it meets the requirements of both general-purpose and advanced applications.

In summary, the Beckhoff EL3112 EtherCAT Terminal provides an accurate, robust, and versatile solution for analogue current measurement. With two differential channels, 16-bit resolution, distributed clock support, and reliable input design, it delivers dependable performance for a wide range of automation and measurement tasks. Its integration into EtherCAT systems ensures flexibility, scalability, and precise synchronisation, making it a key component in modern automation environments.