BECKHOFF EL3021 EtherCAT Terminal

Description

The BECKHOFF EL3021 is a 1-channel analog input terminal designed for processing current signals ranging from 4 to 20 mA. As part of the EtherCAT Terminal system, this device handles differential signal acquisition with a 12-bit resolution, presenting data within a 16-bit format including sign. It integrates directly into modular industrial automation networks via the EtherCAT protocol, providing precise measurement data transfer to the controller.

This compact terminal features internal signal conditioning with an input filter limit frequency of 1 kHz and a default conversion time of 0.625 ms, which is configurable to suit application requirements. System communication and internal logic are powered via the E-bus, while electrical isolation protects the control system from field-side disturbances. The hardware supports standard and compact process image configurations, activatable FIR and IIR filters, and built-in limit value monitoring.

Features

• 1-channel analog input terminal for 4 to 20 mA current signals
• Differential input technology with 12-bit resolution (16-bit presentation including sign)
• Configurable conversion time with a 0.625 ms default setting
• Selectable FIR and IIR filters for signal conditioning
• Integrated limit value monitoring capabilities
• Standard and compact process image modes
• E-bus powered system interface with 500 V electrical isolation

Applications

• Industrial process control and automation systems
• Analog sensor signal acquisition (transmitters, flow meters, pressure sensors)
• Machine building and factory automation monitoring networks
• Data logging and real-time process telemetry

Technical Specifications

General

Signal and I/O

Electrical

Performance and Processing

Connection Technology

Mechanical and Environmental

Installation Guidelines

1. Ensure all power supplies and field voltage sources are switched off and locked out before performing any mechanical or electrical work.
2. Verify the exact model number (EL3021) to ensure compatibility with your existing terminal assembly and E-bus current budget.
3. Mount the terminal onto a standard 35 mm DIN rail (EN 60715) by snapping it securely into place using the integrated locking mechanism.
4. Connect signal wires using approved solid or stranded conductors with appropriate wire preparation and stripping lengths (8 to 9 mm). Actuate the spring terminals using a suitable screwdriver.
5. Check all potential distributions, power contact jumpers, and shield connections before energizing the system.
6. Power up the controller and verify proper module recognition and LED diagnostic status within the TwinCAT engineering environment.