Product Description:

The EL3124-0018 is an analog input terminal manufactured by Beckhoff for the EL EtherCAT Terminals series in decentralized control cabinets. Designed to capture low-level sensor voltages, it interfaces field transducers with the EtherCAT backplane so that the PLC or IPC can use the resulting numeric data for motion control, energy management, or safety interlocks. By offering multiple conversions in one 12 mm slice, the part saves rack space while maintaining deterministic fieldbus timing. This layout is useful where several analog measurement points must fit into a compact terminal row without adding separate signal conditioners.

The module provides 4 analog inputs, each scanned through a multiplex front end and digitized at 16-bit resolution. A differential ground reference improves immunity to earth offsets, while an input path restricted by a 5 kHz filter helps shield the converter from excessive noise. Internal source impedance and the conducting diode drop help reduce sensor loading while still supporting rapid charge redistribution between channels. During operation, the terminal draws 130 mA typically, and its status plus measured values are mapped into a process image with channel data and status information for controller processing. The IP20 housing requires installation inside a control enclosure where dust exposure and accidental contact are controlled.

The housing locks onto a 35 mm DIN rail beside other EtherCAT slices, and power for the internal electronics is supplied exclusively through the E-bus, eliminating separate wiring. Input stages tolerate up to 10 V of common-mode deviation, so floating sensors are less likely to push the converter into saturation. Each channel sources a maximum of 40 mA to the upstream contact, allowing sensor diagnostics or related signaling functions without external relays. This arrangement supports compact cabinet layouts and keeps installation straightforward when several terminals are grouped on the same rail.