Product Description:

The EL3052-0000 is an analog EtherCAT terminal manufactured by Beckhoff as part of the EL EtherCAT Terminals series. It occupies a single slot on a Bus Coupler and converts industrial 4–20 mA loop signals into EtherCAT process data. By translating sensor currents into controller-readable words, the device forms the input stage for PLC-driven monitoring and closed-loop regulation tasks.

It offers 2 analog inputs, each handled sequentially by a multiplex sampler. Incoming loop current passes through a low-pass stage with a 1 kHz input filter cutoff, which suppresses higher-frequency noise before conversion. The successive-approximation converter provides 12-bit resolution, giving 4096 discrete steps across the 4–20 mA signal span. With a ±0.3 % full scale measuring error, the terminal maintains tight linearity for process control loops. The circuitry references all channels to a single-ended ground, and it reports an open circuit through its wire-break detection so that failed transmitters can be recognized immediately. Because the device does not include distributed clocks, time-stamping of samples must be performed by the higher-level controller rather than by the terminal itself.

For auxiliary powering of two-wire transmitters, the internal circuit delivers a 24 V sensor supply and can supply up to 40 mA of input current without external wiring. Isolation barriers provide 30 V dielectric strength, and the housing carries an IP20 protection rating, indicating suitability for mounting inside an enclosed panel. Each scan places 2 bytes of status and 2 bytes of value per channel into the process image, giving the PLC direct access to raw counts and diagnostic bits. The single-ended grounding scheme and multiplex sampling should be considered when selecting wiring distances and update intervals for distributed machine I/O nodes.