Product Description:

The EL3002 is an analog input EtherCAT terminal manufactured by Beckhoff in the EL EtherCAT Terminals series. Mounted beside other remote I/O modules, it accepts low-level process voltages and converts them into digital words that the controller reads cyclically. By integrating signal conditioning, A/D conversion, and network coupling inside a 12 mm-wide housing, the device streamlines distributed measurement tasks in industrial automation systems where space, wiring density, and deterministic data transfer are critical.

It provides 2 single-ended channels that share a multiplexed front end; the sequential sampler connects each input to the converter one after the other. The nominal input range is ±10 V, so field devices operating within that range can drive the converter without external scaling. Each acquisition produces a word with 12 bits of resolution, and the remaining four bits of the 16-bit frame are padded for alignment. With 50 Hz mains rejection, the terminal delivers a new reading every 0.625 ms per channel, while an analog low-pass stage set at 1 kHz attenuates higher-frequency noise. Sampling is multiplexed, and timestamping relies on cyclic EtherCAT updates because distributed clocks are not available.

The module draws logic and sensor power from the E-bus, eliminating separate supply wiring. Its isolation withstands up to 30 V between field conductors and the backplane, protecting the controller against accidental overvoltage. In the cyclic process image, the terminal provides 2 bytes of status data and 2 bytes of value data per channel, matching Beckhoff’s 16-bit data convention for analog units. The housing carries an IP20 rating and snaps onto a 35 mm DIN rail inside a control cabinet. Its 16-bit data presentation provides a consistent format for transferring measured values through the EtherCAT network. The single-ended ground reference supports direct voltage acquisition from compatible field devices without a differential input arrangement.