The Beckhoff EL3201 EtherCAT Terminal is a high-precision analog input module designed for direct connection of RTD (resistance temperature detector) sensors. With one input channel and 16-bit resolution, it is engineered to deliver reliable, detailed, and accurate temperature measurement for demanding industrial applications.

The terminal supports widely used sensor types, including Pt100 and Ni100, as well as other platinum and nickel RTDs such as Pt200, Pt500, Pt1000, Ni120, and Ni1000. With measurement ranges spanning -200…+850°C for Pt sensors and -60…+250°C for Ni sensors, the EL3201 is suitable for diverse monitoring and control applications across process, machine, and building automation.

One of the key strengths of the EL3201 is its flexible wiring options. It accommodates 2-, 3-, and 4-wire connections, with 2-wire being the default. This versatility ensures compatibility with different installation requirements, allowing users to balance accuracy and wiring complexity. For long cable runs or applications demanding maximum precision, the 3- and 4-wire methods minimise the effects of lead resistance, ensuring highly accurate temperature readings.

Performance is enhanced by a configurable conversion time, with a default setting of 24 ms. Depending on the application, users can adjust the conversion time within a range of 4…500 ms, optimising either response speed or stability. In addition, the terminal features an input filter limit frequency of 1 kHz, which reduces interference and helps deliver stable, noise-free measurements.

The EL3201 operates with a measuring current of less than 0.5 mA, depending on load, ensuring minimal self-heating of the connected RTD sensor and preserving the integrity of the measurement. The module draws its power supply directly via the E-bus, eliminating the need for additional wiring and enabling seamless integration into Beckhoff’s modular EtherCAT I/O system.

Thanks to its compact design, the EL3201 saves valuable space in control cabinets while offering powerful functionality. Diagnostic LEDs provide quick feedback on operational status, simplifying commissioning and troubleshooting. As part of the EtherCAT ecosystem, the terminal benefits from high-speed, deterministic communication, ensuring precise synchronisation with other automation processes.

Practical applications for the EL3201 include process monitoring, machine temperature control, HVAC regulation, and laboratory measurement tasks. Whether ensuring consistent product quality in manufacturing, monitoring environmental conditions in buildings, or supporting precision experiments, the EL3201 offers reliable performance and flexibility.

In summary, the Beckhoff EL3201 EtherCAT Terminal is a robust, high-resolution solution for accurate RTD temperature measurement. With support for multiple wiring configurations, 16-bit resolution, configurable conversion times, and wide temperature ranges, it provides engineers with a versatile and dependable tool for integrating precise temperature data into modern automation systems.