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Topic: analog input with Pseudo Ground (Read 666 times) previous topic - next topic

anilkunchalaece

Hi,

I am trying to get a reading from ultrasonic level sensor which is having a 4-20 ma Hart Output.
while i digging the net to know how to do it.
i came across the IC RCV420.
when i gone through this single supply version
i get struck in this Pseudo Ground.. I have no idea what it is.

is it ok to connect the analog input to the 0 to 5 volts meter output? and connect the pseudo ground to the reference ground?

figure1 in the datasheet is attached.
-- Kunchala Anil

Peter_n

#1
Feb 26, 2015, 02:15 pm Last Edit: Feb 26, 2015, 02:16 pm by Peter_n
If it is okay to connect the sensor ground to the Arduino GND, then you only need a resistor for the 4...20mA and a protection resistor to an analog input.
Something like this : http://forum.arduino.cc/index.php?topic=188067.msg1391860#msg1391860

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