The Beckhoff EL3102 EtherCAT Terminal is a high-precision analogue input module designed for capturing voltage signals in demanding automation and measurement applications. With two differential input channels, each capable of handling signals in the -10 V to +10 V range, the EL3102 provides accurate and reliable voltage measurement in a compact EtherCAT I/O format.

Differential measurement technology ensures superior signal integrity by rejecting common-mode noise and minimising interference, a key requirement in industrial environments where electrical noise can degrade measurement quality. This makes the EL3102 especially well suited for applications involving sensitive analogue signals, such as sensor monitoring, quality inspection, and test and measurement systems.

The terminal offers 16-bit resolution, providing precise digitisation of analogue voltages and enabling fine-grained measurement of even the smallest variations in signal levels. Combined with a 5 kHz input filter, the EL3102 achieves an excellent balance between fast response times and effective noise suppression, ensuring accurate measurements even in electrically noisy conditions.

For time-critical applications, the EL3102 supports EtherCAT distributed clock technology with a synchronisation precision of << 1 µs. This ensures that signals captured by the terminal are synchronised with other devices and processes in the EtherCAT system. Such precise timing is vital for applications such as motion control, process synchronisation, or multi-channel data acquisition where accurate correlation of input signals is required.

The terminal features an internal resistance of more than 200 kΩ, which minimises the load on connected signal sources and helps maintain measurement accuracy. Power is supplied via the E-bus, eliminating the need for external wiring and allowing seamless integration into EtherCAT I/O architectures. Its compact size and modular design make it easy to combine with other terminals, creating flexible and scalable I/O configurations.

Typical applications of the EL3102 include industrial process monitoring, where it measures analogue feedback from transducers and sensors; laboratory and test bench systems, where precise voltage acquisition is required; and machine automation, where synchronised analogue input supports closed-loop control strategies. Its combination of high resolution, fast response, and robust design ensures dependable performance across a wide range of industries.

In summary, the Beckhoff EL3102 EtherCAT Terminal delivers accurate, fast, and noise-resistant analogue voltage acquisition. With two differential inputs, ±10 V range, 16-bit resolution, distributed clock synchronisation, and strong noise rejection, it provides a versatile and reliable solution for precision measurement in modern automation and test environments.