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EL3351 | 1-channel resistor bridge input terminal (strain gauge), 16 bit

The EL3351 analog input terminal permits direct connection of a resistor bridge. The bridge voltage, UD, and the supply voltage, UREF, to the bridge are digitised with a 16 bit resolution, and are transmitted along an electrically isolated channel to the supervising automation system. The input channels are available in the form of two 16 bit values for further processing. The resulting measurement can be calculated from the formula: measurement = UD/UREF. Precise acquisition of the supply voltage along with the bridge voltage compensates for long-term and temperature drift.

Technical data EL3351 | ES3351
Number of inputs 2, for 1 resistor bridge
Power supply via the E-bus
Technology resistor bridge, strain gauge
Distributed clocks
Measuring range Ud max. -20…+20 mV
Measuring range Uref max. -12…+12 V
Internal resistance > 200 kΩ (Uref), > 1 MΩ (Ud)
Input filter limit frequency 50 Hz default setting, parameterisable
Conversion time 2.5…800 ms, configurable, default 82 ms
Power supply Uv 5 V, max. 20 mA
Resolution 16 bits, 32 bits presentation
Filter 50 Hz, configurable
Measuring error ≤ ±0.1 % (relative to full scale value, 50 Hz filter)
Current consumption power contacts
Current consumption E-bus typ. 170 mA
Special features slow measured value determination, integrated ±5 V bridge supply
Weight approx. 70 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27/29
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 CE, UL, Ex

 

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