Beckhoff EL3122 EtherCAT Terminal 2-Channel Analog Input, 4–20 mA Differential, 16-bit, 12×100×68 mm

Overview

The Beckhoff EL3122 is a two-channel differential analog input EtherCAT Terminal for 4–20 mA signals. Each channel is digitized with 16‑bit resolution and transferred galvanically isolated to the controller. Open lead and overload conditions are detected and reported; LEDs indicate run/error states. FIR/IIR filters and limit monitoring can be enabled.

Key Features

• 2 differential current inputs, 4–20 mA
• High resolution: 16‑bit; fast conversion ~50 μs (fast mode ~35 μs)
• Input filter limit frequency 5 kHz; common‑mode voltage up to 10 V
• Open‑wire and overload detection; LEDs for diagnostics
• 500 V isolation between E‑bus and signal voltage
• Compact 12 mm IP20 terminal; Distributed Clocks supported

Applications

• Precise acquisition of 4–20 mA process signals from differential transmitters
• High‑speed current measurement with integrated diagnostics

Specifications