Lemur Posted November 6, 2015 Report Share Posted November 6, 2015 Hi, thinking about possibility of using a thermocouple input of RA22 controller to measure a voltage across a shunt resisitor - to measure the DC current. Haven't found any information if the input must be floating, or can be tied to a potential of DC source. Thanks n regards Lemur Quote Link to comment Share on other sites More sharing options...
MVP 2021 Joe Tauser Posted November 10, 2015 MVP 2021 Report Share Posted November 10, 2015 Shunt voltage is a special case because it almost never has the same common as dc ground, unless it happens to the the last thing in the circuit. Every time I've done this I use a DC/DC isolator an just output a regular 4/20 signal to an analog input. Joe T. Quote Link to comment Share on other sites More sharing options...
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