Description

The BECKHOFF EL3403-0333 is a 3-channel analog input terminal designed specifically for extensive power measurement within an EtherCAT industrial automation network. This high-precision terminal directly acquires three current channels and three voltage channels to perform comprehensive 3-phase power measurements for alternating voltages. It is engineered to monitor electrical networks continuously, providing critical operational data such as active power, reactive power, apparent power, energy consumption, power factor (cos φ), frequency, and true RMS values for voltage and current.

Integrated within the modular EtherCAT I/O system, the EL3403-0333 communicates process data directly to the controller via the E-bus, ensuring deterministic performance and synchronized data acquisition. The device processes input signals mains-synchronously with a high 16-bit resolution, making it well-suited for energy monitoring, machine diagnostics, and power quality assessment in industrial environments. Its compact housing features pluggable wiring capability and clear diagnostic LEDs for rapid status identification during installation and maintenance.

Features

• 3-channel analog input terminal for simultaneous 3-phase voltage and current acquisition
• Supports measuring voltages up to 500 V AC 3~ (ULX-N up to 288 V AC) and measuring currents up to 1 A AC via external transformers
• Calculates true RMS values, active power, reactive power, apparent power, energy, frequency, and cos φ
• Mains-synchronous conversion and update time for accurate grid monitoring
• Process image bit width of 62 bytes for PM inputs and 3 bytes for PM outputs
• Powered via the internal E-bus (typ. 120 mA) with integrated electrical isolation up to 1500 V
• Optional single-phase operation mode for versatile application setups
• Compact terminal housing with pluggable wiring design and front-facing signal LEDs

Applications

• Industrial energy data acquisition and sub-metering systems
• 3-phase power grid monitoring and power quality analysis
• Machine health monitoring and predictive electrical load tracking
• Drive system efficiency and consumption profiling

Technical Specifications

General

Signal and I/O

Performance and Communication

Electrical Supply

Connection Technology

Mechanical and Environmental

Compliance and Approvals

Installation Guidelines

1. Ensure the entire control cabinet and associated power circuits are completely de-energized and locked out before performing any mechanical or electrical work.
2. Verify that the terminal model matches system engineering documents. Inspect the housing and connection points for any transit damage.
3. Mount the terminal onto a standard 35 mm DIN rail (conforming to EN 60715) alongside existing EtherCAT terminals, utilizing the double slot and key connection for side-by-side alignment.
4. Connect the voltage inputs and external current transformers to the appropriate terminal points, ensuring conductor cross-sections and stripping lengths comply with technical requirements.
5. Connect the EtherCAT communication cables to the appropriate ports and verify secure engagement of the E-bus connectors.
6. Check all potential groups, power contact supplies, and field-side wiring thoroughly before restoring power to the system.
7. Power on the control system and verify operational status using the integrated diagnostic LEDs and the TwinCAT engineering environment.