EL3058 by Beckhoff

The EL3058 is an analog input EtherCAT terminal produced by Beckhoff for the EL EtherCAT Terminals series. The unit converts field-level current signals into digital process data that a PLC can read over the EtherCAT network, allowing precise monitoring of machine variables such as pressure, position, and temperature. It snaps onto a standard DIN rail beside other terminals and receives power and communication through the internal E-bus contacts. This modular connection method allows the terminal to be added to an EtherCAT station without separate network wiring between adjacent modules.

The terminal has 8 single-ended inputs that share a multiplexed sampling path. Each channel is conditioned by a low-pass input filter with a cutoff frequency of 1 kHz and then digitized at a resolution of 12 bits. The converter processes all channels within 1.25 ms, making the terminal suitable for fast EtherCAT cycles. Acquired data occupy 2 bytes of status information and 2 bytes of measured value per channel in the process image, allowing diagnostic flags to accompany every sample. Distributed clocks are not supported, so the EtherCAT master must manage any required time alignment. The housing has an IP20 protection rating and is intended for installation inside a protected control cabinet.

The module draws 130 mA from the E-bus, while its input contacts require 40 mA from the field supply. The maximum permissible input voltage is 30 V, helping protect the channels when adjacent signal sources have small potential differences. The input path has a typical resistance of 85 ?, providing a consistent load for connected transducers and helping damp transient currents. Its compact dimensions of 15 × 100 × 70 mm match the standard Beckhoff terminal housing width. This narrow enclosure supports a high channel density while limiting the amount of DIN-rail space required inside the cabinet. Proper spacing and cabinet protection help maintain dependable operation within the permitted ambient conditions.