Beckhoff EL3773 - 3 Product Overview; Introduction

Product overview
EL377314 Version: 2.5
3 Product overview
3.1 Introduction
Fig.9: EL3773
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V
rms
). For each phase voltages up to 288 V
rms
/410
V
DC
and currents up to 1 A
rms
/1.5 A
DC
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.
Note
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).
Quick links
• EtherCAT basics [}18]
• Quick start [}42]
• Creation of the configuration [}43]
• Process data [}86]