The Beckhoff EL3114 EtherCAT Terminal is a versatile and high-precision analogue input module designed for acquiring current signals from industrial transmitters and sensors. With four differential input channels, the terminal supports the industry-standard 0…20 mA current range, making it suitable for a broad variety of applications in process automation, machine control, and data acquisition.

Equipped with 16-bit resolution, the EL3114 ensures highly accurate digitisation of analogue signals. This fine resolution allows engineers to capture even small variations in process values, which is crucial in industries where precision directly affects product quality, efficiency, or safety. Applications such as monitoring pressure, flow, level, or temperature via current loop transmitters benefit from the terminal’s precise and stable measurements.

The use of differential input technology enhances noise immunity by rejecting common-mode signals, ensuring reliable data capture even in environments with high electrical interference. This design makes the EL3114 particularly well suited for industrial plants where long sensor cables, motors, or switching devices can otherwise compromise signal integrity.

A key feature of the terminal is its support for EtherCAT distributed clock functionality, which enables synchronisation of input data across multiple devices in a network with sub-microsecond precision (<< 1 µs). This allows time-stamped and perfectly aligned measurements, a critical advantage in applications such as synchronised motion control, process coordination, or advanced monitoring systems.

The module’s internal resistance of approximately 85 Ω plus diode voltage ensures compatibility with a wide range of current loop transmitters, providing predictable loading characteristics without distorting the measured signal. Its signal bandwidth is determined by the integrated input filter, balancing fast response times with noise suppression to deliver clean and accurate readings.

Powered directly via the E-bus, the EL3114 integrates seamlessly into Beckhoff’s modular EtherCAT I/O system. This plug-and-play architecture enables easy combination with digital, analogue, and special-purpose terminals to create tailored automation solutions. Its compact form factor conserves cabinet space while maintaining high functionality, making it an efficient choice for scalable systems.

Typical applications include process automation, where the EL3114 captures analogue signals from transmitters monitoring key process variables; machine automation, where it provides accurate feedback from current-based sensors; and test and measurement systems, where synchronised, high-resolution data acquisition is essential. The combination of precision, robustness, and EtherCAT integration makes the EL3114 an excellent choice for both centralised and decentralised control architectures.

In summary, the Beckhoff EL3114 EtherCAT Terminal is a reliable and precise solution for differential current measurement. With four channels, 16-bit resolution, distributed clock support, and robust noise-resistant design, it provides engineers with the accuracy and performance required for modern automation and monitoring systems.