The EL3773 and EL3783 power monitoring terminals are designed for state monitoring of 3-phase AC voltage systems. For each phase voltages and currents are sampled as instantaneous values with a resolution of 16 bits:
- for the EL3773 up to 288 Vrms/410 V DC and up to 1 Arms/1.5 A DC
- for the EL3783 up to 400/690 V AC and up to 5 A AC, each with “ExtendedRange”
The six channels are measured simultaneously based on the EtherCAT oversampling principle with a temporal resolution of up to 100 μs (EL3773) or up to 50 μs (EL3783) and passed on to the control system. With the processing power available there and in combination with the TwinCAT Function TF3650, true RMS or power calculations as well as complex user-specific algorithms can be calculated via the voltage and current characteristics. Through the oversampling, 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. Both of the terminals support distributed clocks and can therefore measure synchronously with other EtherCAT devices. However, they can also be operated without distributed clocks.
The EL3783 offers the “ExtendedRange” feature enabling the use of the full technical measuring range, which equals 130% of the specified nominal measuring range.
Product status:
regular delivery
Product information
Technical data | EL3773 |
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Number of inputs | 3 x current, 3 x voltage |
Oversampling factor | n = 1…100 selectable |
Distributed clocks | yes |
Conversion time | min. 100 µs, all channels simultaneously |
Measured values | current (I1, I2, I3), voltage as instantaneous values (oversampling) |
Measuring voltage | max. 500 V AC 3~ (ULX-N: max. 288 V AC), max. 410 V DC |
Measuring current | max. 1 A (AC)/1.5 A (DC), via measuring transformers x A AC/1 A AC |
Measuring range, technical | generally 100% of the nominal measuring range, see documentation |
Resolution | 16 bit (incl. sign) |
Measurement error/uncertainty | 0.5% relative to full scale value |
Electrical isolation | 2500 V |
Current consumption power contacts | – |
Current consumption E-bus | 200 mA |
Special features | oversampling, AC/DC measurement, optional single-phase operation, adjustable hardware filters |
Operating/storage temperature | 0…+55°C/-25…+85°C |
Weight | approx. 75 g |
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 |
Approvals/markings | CE, UL |
Protect. rating/installation pos. | IP20/variable |
Housing data | EL-12-8pin |
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Design form | compact terminal housing with signal LEDs |
Material | polycarbonate |
Dimensions (W x H x D) | 12 mm x 100 mm x 68 mm |
Installation | on 35 mm DIN rail, conforming to EN 60715 with lock |
Side by side mounting by means of | double slot and key connection |
Marking | labeling of the BZxxx series |
Wiring | solid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver |
Connection cross-section | s*: 0.08…2.5 mm², st*: 0.08…2.5 mm², f*: 0.14…1.5 mm² |
Connection cross-section AWG | s*: AWG28…14, st*: AWG28…14, f*: AWG26…16 |
Stripping length | 8…9 mm |
Current load power contacts | Imax: 10 A |
*s: solid wire; st: stranded wire; f: with ferrule
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