EL3202 Beckhoff
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MPN: EL3202-0000
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The Beckhoff EL3202 is part of the EL EtherCAT Terminals series and features two RTD inputs with Delta-Sigma ADC method and supports Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, and Ni1000 sensors. It has a resolution of 0.1 degrees Celsius per digit, uses single-ended ground reference, and is designed for mounting on a 35 mm DIN rail with an IP20 protection rating.
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Product Description:
The EL3202 is an analog input terminal from Beckhoff’s EL EtherCAT Terminals series. Designed for resistance temperature detectors, it converts sensor resistance into normalized digital temperature values and passes them to an EtherCAT controller. The module allows distributed temperature acquisition close to the process, reducing wiring and simplifying diagnostics in industrial automation systems. Because it shares the same mechanical format as other EL family slices, multiple I/O functions can be combined in one compact rack.
Each of the two input channels is digitized by a Delta-Sigma converter, and the module cycles between them through Multiplex sampling. The Delta-Sigma topology oversamples the sensor signal and applies digital filtering, raising noise immunity at low signal levels. This architecture yields a resolution of 0.1 °C per digit, which is reported to the controller as a 2 × 32-bit RTD input value in the process image. Supported curves include Pt100/Pt200/Pt500/Pt1000/Ni100/Ni120/Ni1000, and wiring can be executed in 2-wire or 3-wire configurations so lead-resistance compensation can be selected to suit the installation.
For installation, the terminal clips onto a 35 mm DIN rail and occupies only 12 × 100 × 68 mm. Logic power and bus communication are fed through the E-bus, while the independent power contacts can carry up to 10 A for neighboring terminals on the same rail. The measurement circuit is single-ended with respect to ground, and the RTDs receive a continuous-current excitation so low resistance changes remain linear. Continuous-current excitation keeps the sensor element at a predictable dissipation level, avoiding self-heating errors that would exceed the module’s measurement step size. An IP20 housing guards the electronics from accidental finger contact and dust within enclosed control cabinets.
Frequently Asked Questions about EL3202:
Q: How many input channels are available on the EL3202 EtherCAT Terminal?
A: The EL3202 terminal supports two input channels for RTD sensors.
Q: Which RTD sensor types does the EL3202 terminal support?
A: Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, and Ni1000 RTD sensor types are compatible with the EL3202 terminal.
Q: What is the temperature measurement resolution of the EL3202 terminal?
A: This terminal achieves a measurement resolution of 0.1°C per digit for RTD inputs.
Q: What ADC method is used by the EL3202 terminal for RTD signal conversion?
A: The EL3202 uses the Delta-Sigma ADC method for converting analog RTD signals.
Q: How is the EL3202 EtherCAT Terminal mounted in an enclosure?
A: The EL3202 is designed to mount on a 35 mm DIN rail for easy installation in control cabinets.
