Power monitoring oversampling terminal for alternating voltages up to 690 V AC EL3783
L3 OK, L3 Error
L2 OK, L2 Error
L1 OK, L1 Error
Error LED
IL3 OK, IL3 Error 
IL2 OK, IL2 Error 
IL1 OK, IL1 Error 
Run LED 
measurement IL1
measurement IL2
measurement IL3
Top view 
Contact assembly 
XFC – eXtreme Fast Control

EL3783 | Power monitoring oversampling terminal for alternating voltages up to 690 V AC

eXtreme Fast ControlThe EL3783 EtherCAT Terminal is a power monitoring I/O terminal used for state monitoring of a 3-phase AC voltage system. For each phase, voltage up to 400/690 Veff and current up to 1 Aeff/5 Aeff are sampled as instantaneous values with a resolution of 16 bits. The six channels are measured simultaneously based on the EtherCAT oversampling principle with a temporal resolution of up to 50 µs and then passed on to the control system. The control system has sufficient computing power for true RMS or performance calculations 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 control system. AC and DC parameters must be connected and measured with a common reference potential.

Through the feature “ExtendedRange”, the user has the full technical measuring range available at up to 130 % of the specified nominal measuring range. The EL3783 supports distributed clocks and can therefore measure synchronously with other EtherCAT devices. In combination with EL6688 it can be synchronised via IEEE 1588 to external clocks. The terminal can also be operated without distributed clocks.

Technical data EL3783
Number of inputs 3 x current, 3 x voltage
Technology 3-phase power monitoring for alternating voltages
Oversampling factor n = 1…100 selectable
Distributed clocks yes
Conversion time 50 µs, all channels simultaneously
Measured values current (I1, I2, I3), voltage as instantaneous values (oversampling)
Measuring voltage max. 690 V AC 3~ (ULX-N: max. 400 V AC)
Measuring current max. 1 A (AC)/5 A (AC), via measuring transformers x A AC/1 A AC or 5 A AC
Measuring range, technical generally 130 % of the nominal measuring range, see documentation
Resolution 16 bit (incl. sign)
Measuring error 0.2 % relative to full scale value
Electrical isolation 4500 V
Current consumption power contacts
Current consumption E-bus typ. 260 mA
Special features oversampling, AC measurement, single-phase operation also possible, adjustable automatic switch of current measuring range, electrically isolated current inputs
Weight approx. 100 g
Operating/storage temperature 0…+55 °C/-25…+85 °C (-25…+60 °C/-40…+85 °C in preparation)
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/see documentation
Approvals CE
EL6688 IEEE 1588 external synchronisation interface