EL3403-0010 Beckhoff
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The Beckhoff EL3403-0010 is part of the EL EtherCAT Terminals series and supports three current and three voltage inputs. It measures up to 500 V AC and 5 A AC using a true RMS procedure with a simultaneous sampling rate of 78,000 samples per second. This terminal features an IP20 protection rating, has a dielectric strength of 1,500 V, and a current resolution of 5 microamps.
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Product Description:
The EL3403-0010 is a power-measurement EtherCAT terminal produced by Beckhoff in the EL EtherCAT Terminals series. Installed beside standard I/O cards, it captures electrical parameters of three-phase supplies so that PLC programs can supervise energy use and detect abnormal loads. The module provides 3 current channels and 3 voltage channels, allowing simultaneous acquisition of each phase on a motor feeder or plant bus. By transferring computed values over EtherCAT, the terminal supplies deterministic, cycle-synchronous feedback that can be logged, displayed, or used for real-time control decisions. This arrangement is useful where controllers must track changing loads across all three phases without relying on a separate external analyzer.
In operation, the terminal accepts phase voltages up to 500 V AC 3~ and phase currents up to 5 A (AC). The low 7 mΩ current-path resistance minimizes power loss and allows installation behind standard current transformers. The voltage inputs have a 500 kΩ input impedance that avoids loading the circuit. Raw signals are digitized with a resolution of 0.1 mV on the voltage side and 5 µA on the current side, giving the controller fine-grained trend data. All six channels are sampled at 78,000 samples/s with a mains-synchronous conversion cycle, and the processed data are released on a net-synchronous update that aligns precisely with the fieldbus cycle.
Electrical isolation of 1,500 V between the measurement circuitry and the EtherCAT backplane safeguards adjacent modules. The housing carries an IP20 rating suited for mounting inside control cabinets. All channels share a single-ended ground reference, simplifying wiring in compact panels. Power quantities are calculated with the True RMS algorithm, producing accurate results even when voltage or current waveforms are distorted. Because each phase is acquired through simultaneous sampling, the phase relationships required for real-time active, reactive, and apparent power calculation are maintained without interpolation.
Frequently Asked Questions about EL3403-0010:
Q: What is the maximum current measurement supported by the EL3403-0010?
A: The EL3403-0010 terminal supports measuring 5 A AC current on each input.
Q: What is the voltage input resistance per channel for the EL3403-0010?
A: The EL3403-0010 has a voltage input resistance of 500 kΩ on each channel.
Q: What is the sampling rate of the EL3403-0010 EtherCAT terminal?
A: Its sampling rate is 78,000 samples per second, allowing for high-resolution measurements.
Q: What voltage resolution does the EL3403-0010 offer?
A: This terminal provides a voltage resolution of 0.1 mV, enabling precise voltage detection.
Q: What type of measuring procedure is implemented in the EL3403-0010?
A: The EL3403-0010 EtherCAT terminal uses a true RMS measuring procedure.
