1-channel analog input terminal strain gauge, 16 bit, Ex i  ELX3351
Self calibration
Error LED
Run LED 
Power contact
+24 V EX
Power contact
0 V EX
Top view 

ELX3351 | 1-channel analog input terminal strain gauge, 16 bit, Ex i

ExThe analog ELX3351 input terminal enables direct connection of a resistor bridge or load cell from hazardous areas, Zone 0/20 and 1/21. The terminal can be connected in 4- or 6-wire technology. The ratio between the bridge voltage UD and the supply voltage UR is determined in 16-bit resolution, and the load value is calculated as a process value. Apart from automatic self-calibration (can be deactivated), additional functions such as Tara and Freeze as well as dynamic filters are integrated.

Technical data ELX3351 | ESX3351
Sensor types resistor bridge, strain gauge
Number of inputs 1, for 1 resistor bridge in full bridge technology
Bridge input resistance 300 Ω…1.5 kΩ
Measuring range UD max. -20…+20 mV
Measuring range UREF max. -12…+12 V
Internal resistance > 25 kΩ (UR, differential), > 1 MΩ (UD, differential)
Input filter limit frequency typ. 9.5 kHz (-3 dB, low pass)
Conversion time 1.5…800 ms, configurable
Resolution 16 bit, 32 bit presentation
Filter 50 Hz, configurable
Measuring error < ±0.5 % (relative to full scale value), self-calibration activ
Power supply UV up to 12 V DC from power contacts, dependent on sensor
Supply voltage electronics 24 V DC (via power contacts), ELX9560 power supply
Current consumption power contacts depends on sensor, min. 20 mA
Current consumption E-bus typ. 110 mA
Supported nominal sensitivity all, parameter resolution: 0.01 µV/V; recommended: 0.5…3 mV/V
Special features self-calibration, dynamic filters
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/see documentation
Pluggable wiring for all ESXxxxx terminals
Approvals CE, Ex
Product announcement
estimated market release 1st quarter 2018