Introduction
Power monitoring oversampling terminal
The EL3773 EtherCAT Terminal is designed as a power monitoring terminal for the state monitoring of a 3-phase AC voltage system (rated mains voltage 230/400 Vrms). For each phase voltages up to 288 Vrms/410 VDC and currents up to 1 Arms/1.5 ADC are sampled as instantaneous values with a resolution of 16 bit.
The six channels are measured simultaneously based on the EtherCAT oversampling principle with a temporal resolution of up to 100 µs and passed on to the controller. The controller has sufficient computing power for true RMS or performance calculation and complex custom algorithms based on the measured voltages and currents.
Through the oversampling principle the terminal is able to measure at significantly shorter intervals than the cycle time of the controller. AC and DC parameters must be connected and measured with a common reference potential.
The EL3773 supports distributed clocks for measuring synchronously with other EtherCAT devices, but can also be operated without distributed clocks.
 | RMS value (rms) specifications All AC value specifications in this documentation such as RMS specifications (rms) refer to a 50/60 Hz 3-phase mains network with a sinusoidal waveform (crest factor 1.414). |