BECKHOFF EL3681 EtherCAT Terminal Analog Input Multimeter Module

Description

Engineered for high-precision electrical measurement, the EL3681 EtherCAT Terminal functions as an integrated digital multimeter, enabling direct AC and DC electrical measurements within a standard EtherCAT I/O station. This 1-channel analog input terminal processes signal voltages up to 300 V AC/DC and currents up to 10 A, making it highly suitable for comprehensive power and load monitoring applications.

The module supports both manual and automatic range selection across multiple voltage (300 mV to 300 V) and current (100 mA to 10 A) measurement intervals. Utilizing advanced measurement procedures, the EL3681 performs arithmetic averaging for DC signals and True RMS (root-mean-square) calculations for AC signals. Data is transmitted directly to the controller via a 32-bit process image for high-accuracy analysis.

Features

• Automatic Range Selection: Dynamically adjusts measuring ranges for optimal resolution and accuracy.
• High-Resolution Digitization: Provides 18-bit resolution plus sign across all voltage and current measurement fields.
• Dual Measurement Modes: True RMS calculation for AC signals and arithmetic averaging for DC signals.
• Integrated Protection: Equipped with an onboard, replaceable 1.25 A fuse and a designated spare fuse compartment.
• Robust Isolation: Electrical isolation of up to 1500 V between the E-bus and the field potential.

Applications

• Industrial power and load monitoring systems.
• Automated test benches and laboratory testing setups.
• Machine tool condition monitoring and diagnostics.
• Energy management systems in production facilities.

Technical Specifications

Connections and Interfaces

Installation Guidelines

The EL3681 EtherCAT Terminal is designed for direct mounting on 35 mm DIN rails conforming to EN 60715. Side-by-side mounting is achieved securely via an integrated double slot and key connection mechanism. Ensure the mounting position provides adequate heat dissipation to keep operating temperatures within the -25 to +60 degC range. For wiring, use correct stripping lengths of 8 to 9 mm to guarantee secure clamping contact within the spring terminals.

Compliance and Certifications

• CE: Conforms to relevant European directives.
• EMC Immunity: Conforms to EN 61000-6-2.
• EMC Emission: Conforms to EN 61000-6-4.
• Vibration Resistance: Conforms to EN 60068-2-6.
• Shock Resistance: Conforms to EN 60068-2-27.