Product Description:

The EL3124-0090 analog input terminal is manufactured by Beckhoff as a member of the EL EtherCAT Terminals series. It serves as a voltage acquisition module that digitizes low-level sensor signals for real-time control networks. The unit integrates four differential channels into a compact slice that installs directly on a DIN rail, allowing collection of process variables such as pressure transducer and potentiometer outputs without separate converters. By using EtherCAT communication, the terminal fits into decentralized I/O architectures for precise and synchronized data collection.

The module offers 4 input channels, and each one is digitized at 16-bit resolution so small voltage variations are preserved in the controller’s process image. A programmable analog filter attenuates high-frequency noise, and the cutoff is 5 kHz, balancing response time and signal clarity. Data from the channels is transferred as a 4 × 16-bit plus 4 × 8-bit process image when Distributed Clocks are active. With a differential ground reference, error from ground loops is minimized, and the enclosure meets the IP20 protection class for cabinet-mounted equipment. The installation position is variable, so orientation does not affect performance.

The terminal has a 10 V common-mode voltage limit, which protects the front end against potential shifts between sensor pairs. Each channel allows a maximum input current of 40 mA, permitting direct connection of most passive transmitters without excessive terminal loading. The source device voltage must remain below 30 V to avoid overrange. The terminal snaps onto a 35 mm mounting rail, and its simultaneous sampling keeps all channel data phase-aligned for control tasks such as power quality analysis. Differential measurement and filtering help reduce interference during high-frequency events.