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BECKHOFF端子模塊EL3112是2通道模擬量模塊，
EL3112 | 2-channel analog input terminals 0…20 mA, differential input, 16 bit
The EL3112 analog input terminal processes signals in the range between 0 and 20 mA. The current is digitised to a resolution of 16 bits and is transmitted, electrically isolated, to the higher-level automation device. The input channels of the EtherCAT Terminal have differential inputs and possess a common, internal ground potential. The EL3112 combines two channels in one housing. Overload condition is detected, and the terminal status is relayed to the controller via the E-bus. The EtherCAT Terminal indicates its signal state by means of light emitting diodes. The error LEDs indicate an overload condition.
| Technical data | EL3112 | ES3112 |
|---|---|
| Number of inputs | 2 (differential) |
| Power supply | via the E-bus |
| Technology | differential input |
| Signal current | 0…20 mA |
| Oversampling factor | – |
| Distributed clocks | yes |
| Distributed clock precision | << 1 µs |
| Internal resistance | 85 Ω typ. + diode voltage |
| Input filter limit frequency | 5 kHz |
| Common-mode voltage UCM | 10 V max. |
| Conversion time | ~ 50 µs (fast mode ~ 35 µs) |
| Input signal bandwidth | see input filter |
| Resolution | 16 bit (incl. sign) |
| Measuring error | < ±0.3 % (relative to full scale value) |
| Surge voltage resistance | 35 V DC |
| Electrical isolation | 500 V (E-bus/signal voltage) |
| Current consumption power contacts | – |
| Current consumption E-bus | typ. 170 mA |
| Bit width in the process image | inputs: 8 byte |
| Special features | standard and compact process image, activatable FIR/IIR filters, limit value monitoring |
| Weight | approx. 55 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 |
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