The Beckhoff EL3681-0030 EtherCAT Terminal is a specialised, high-precision multimeter terminal designed for direct measurement of electrical parameters in automation systems. With its ability to monitor AC/DC voltage up to 300 V and current up to 10 A, it serves as a versatile measurement module that integrates seamlessly into EtherCAT networks, eliminating the need for external multimeters or measurement devices.

The terminal provides a single input channel capable of handling either voltage or current signals, with flexible measuring ranges tailored to different applications. For voltage, it supports ranges of 300 mV, 3 V, 30 V, and 300 V, while current measurement can be carried out in ranges of 100 mA, 1 A, or 10 A (via a high-current path). This versatility enables engineers to monitor everything from low-level sensor outputs to mains-level voltages and high currents in one compact module.

With an impressive 19-bit resolution and external calibration, the EL3681-0030 ensures high measurement accuracy and consistency across its ranges. Internal resistance values are carefully optimised at 3 mΩ, 0.2 Ω, and 12.5 MΩ, ensuring both precision and stability during operation.

The module’s conversion time is preset at 0.5 seconds (1 second when switching measuring ranges), though it can be shortened to a minimum of 65 ms for dynamic measurement requirements. This makes it flexible enough for applications requiring both stable monitoring of steady-state signals and fast sampling of fluctuating values.

Measured values include true current and voltage signals, enabling detailed monitoring of electrical parameters within machines, test systems, or power monitoring setups. By directly capturing and transmitting these values into the EtherCAT I/O system, the terminal provides real-time data that can be used for diagnostics, process monitoring, or integration into control loops.

The EL3681-0030 is particularly well-suited for energy monitoring, quality assurance, predictive maintenance, and test engineering. For example, it can be used to monitor the electrical consumption of machinery, evaluate supply quality, or verify operating conditions in automated systems without the need for standalone test equipment.

Seamless integration with Beckhoff TwinCAT software ensures straightforward configuration and diagnostic capabilities. Engineers can configure measuring ranges, view live data, and log long-term measurements directly within the control platform. This integration reduces setup effort and supports transparent system monitoring.

In summary, the Beckhoff EL3681-0030 EtherCAT Terminal is a high-performance multimeter module that combines 300 V/10 A measuring capability, 19-bit resolution, multiple ranges, and EtherCAT connectivity. Compact and precise, it provides an ideal solution for applications requiring accurate electrical measurements directly within automation systems, helping engineers simplify setups while enhancing system reliability and transparency.