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A question - can I connect a loop powered analogue OUTPUT (2 wire system) to a passive instrument (positioner) that has a seperate 24vDC supply? I have tried this and it works on the test bench. The main question - will the instrument last in the field? What will the effect be of this "additional" 24vDC that is supplied with the setpoint signal? Or is this 24vDC at 4mA so little that the passive instrument will just ignore it?
Hope you can give me some peace of mind here...
[email protected]
Hope you can give me some peace of mind here...
[email protected]