The EL3702 analog input terminal handles signals in the range between -10 and +10 V. The voltage is digitized to a resolution of 16 bits, and is transmitted, electrically isolated, to the controller. The signals are over-sampled with an adjustable, integer multiple (oversampling factor: n) of the bus cycle time (n micro cycles per bus cycle). For each micro cycle, the EtherCAT
The distributed clocks function enables several EL3702 devices to be synchronized in almost any configuration. The maximum sampling rate per channel is 100 ksamples/s (100,000 samples/s).
| Technical data | EL3702 | ES3702 |
| Number of inputs | 2 (differential) |
| Power supply | via the E-bus |
| Technology | differential input, oversampling |
| Signal voltage | -10…+10 V |
| Max. sampling rate | max. 10 µs/100 ksps (per channel, simultaneously) |
| Oversampling factor | n = 1…100 selectable (max. 100 ksamples/s) |
| Input signal bandwidth | 0…30 kHz recommended |
| Distributed clocks | yes |
| Distributed clock precision | << 1 µs |
| Internal resistance | > 200 kΩ |
| Input filter limit frequency | 80 kHz |
| Common-mode voltage UCM | max. 35 V |
| Conversion time | ~ 10 µs per sample |
| Resolution | 16 bit (incl. sign) |
| Measuring error | < ±0.3 % up to 10 Hz (relative to full scale value) |
| Electrical isolation | 500 V (E-bus/signal voltage) |
| Current consumption power contacts | – |
| Current consumption E-bus | typ. 200 mA |
| Bit width in the process image | input: n x 2 x 16 bit data; optionally 2 x 16 bit cycle counter, 4 byte StartNextLatch time |
| Special features | oversampling |
| Weight | approx. 60 g |
| Operating/storage temperature | -25…+60 °C/-40…+85 °C |
| 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/variable |
| Pluggable wiring | for all ESxxxx terminals |
| Approvals/markings | CE, UL, ATEX, IECEx |
| Ex-Marking | II 3 G Ex nA IIC T4 Gc Ex nA IIC T4 Gc Ex tc IIIC T135 °C Dc |
| Further information | |
| XFC | eXtreme Fast Control Technology |
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EL3702 Beckhoff 2-channel analog input terminal