BECKHOFF EL4122 EtherCAT Terminal

Description

Designed for high-precision industrial control processes, the BECKHOFF EL4122 is a 2-channel analog output EtherCAT Terminal operating within the 4 to 20 mA range. This module converts digital control values from the automation system into analog current signals with a high-resolution output of 16 bits. Electrically isolated from the E-bus, the terminal ensures reliable operation in noise-prone automation environments. Integrated distributed clock functionality provides highly accurate synchronization, supporting synchronization precision to less than 1 us, making it suitable for applications requiring strict timing alignments.

Features

• Two channels of analog current outputs supporting a 4 to 20 mA signal range.
• High-resolution 16-bit digital-to-analog conversion for accurate control.
• Supports Distributed Clocks (DC) for precise synchronization down to less than 1 us.
• Short-circuit proof design with load limits under 500 Ohm.
• Configurable watchdog parameters and customizable user synchronization.
• Compact 12 mm housing width maximizing DIN rail space.
• Galvanic isolation of 500 V between the E-bus and the process signal levels.

Applications

• Proportional valve control and positioning systems.
• Variable speed drive speed referencing and modulation.
• Process automation loop controllers in oil, gas, and water utilities.
• Actuator and physical positioning control loops.
• General manufacturing automation requiring precise analog setpoints.

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mounting: Mount horizontally on a standard 35 mm DIN rail (conforming to EN 60715). Ensure the locking mechanism is securely locked in place.
• Interconnection: Connect adjacent modules using the double slot and key connection system to ensure continuous E-bus performance.
• Grounding: Ensure the DIN rail is connected to a clean, noise-free functional earth terminal to preserve the signal integrity of the analog channels.
• Shielding: Use shielded analog cabling and ground the shields near the terminal entry point to minimize electromagnetically induced noise.

Compliance and Certifications

• Certifications: CE, UL, ATEX
• Ex Marking: II 3 G Ex nA IIC T4 Gc
• EMC Standards: Conforms to EN 61000-6-2 (Immunity) and EN 61000-6-4 (Emission)
• Vibration / Shock Resistance: Conforms to EN 60068-2-6 and EN 60068-2-27