2-channel inductive sensor interface (LVDT, half bridge, RVDT) EL5072
Run LED
UP LED
Excitation Error Ch1 LED
Amplitude Error Ch1 LED
Excitation Error Ch2 LED
Amplitude Error Ch2 LED
Power contact
+24 V
Power contact 0 V
Usens+ Ch1 
Usig+ Ch1 
Uexc+ Ch1 
Uexc+ Ch2 
Usig+ Ch2 
Usens+ Ch2 
Usens– Ch1
Usig– Ch1
Uexc– Ch1
Uexc– Ch2
Usig– Ch2
Usens– Ch2
Top view 
Contact assembly 

EL5072 | 2-channel inductive sensor interface (LVDT, half bridge, RVDT)

The EL5072 EtherCAT Terminal is used for the direct connection of up to two inductive displacement sensors, which include measuring probes in LVDT and half bridge versions or inductive angle position sensors in RVDT version. The integrated excitation source provides a further area with various excitation frequencies and voltages. Due to the switchable input impedances and different conductor connection options of LVDT in 4-, 5- and 6-wire technology up to half bridge in 3- and 5-wire technology, all commercially available sensors can be connected and evaluated.

All sensor parameters such as excitation frequency, excitation voltage, measuring range and sensitivity are adjusted directly in the terminal. The measuring signal range is automatically adjusted; therefore, the measured value is directly output as a position value with a resolution of 24 bits. The exceeding and falling short of the measuring range, an inversion of the measuring signal and a reference position can be parameterized via the process data. Furthermore, wire breakage and short circuit can be diagnosed per channel and displayed via signal LEDs.

Precision measuring tasks in the area of position and distance measurement with inductive measuring probes can be successfully solved in this way with the EL5072.

Technical data EL5072
Technology inductive sensor interface
Input connections LVDT (ratiometric & differential), inductive half bridge, RVDT
Number of channels 2
Distributed clocks yes
Excitation voltage Uexc 0.5 Vrms to 7 Vrms (1.5 VPP to 20 VPP), joint source for both channels
Total excitation current max. 80 mArms (225 mAPP)
Excitation frequency (sinus) 1 kHz up to 20 kHz, adjustable
Current consumption power contacts typ. 40 mA + load
Resolution 24 bit, 32 bit presentation
Measuring signal range USIG max. 7 Vrms (automatic adjustment)
Conversion time 100 µs/10 ksps
Electrical isolation 500 V (E-bus/field potential)
Current consumption E-bus 150 mA
Special features short circuit and open circuit fault detection per channel
Weight approx. 60 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
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
Approvals/markings CE
Product announcement
estimated market release 2nd quarter 2020