distance analog output 4-20mA

@pikolo23-XyyP17 • Oct 26, 2024

Oct 26, 2024

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I want connect analog 4-20mA output of analyzer to arduino, please suggest me the cabling standard to be used?

How much distance analog output 4-20mA output can cover?

In my case it is around 700m what is the max distance covered by 4-20mA output

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Ramani Aswath

@ramani-VR4O43 • Apr 9, 2018

700 m is a long distance. The 4-20 ma loop is not too dependent on length. However, at the maximum signal level of 20 ma there can be a voltage drop of something like 3 v in the 700 m long loop. The power supply has to accommodate this extra voltage over all other voltage drops in the other loads. A 24 v supply usually suffices.
This article from National Instruments gives some basic info.:
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pikolo23

@pikolo23-XyyP17 • Apr 11, 2018

yes I am using 24VDC as external supply but I need to know whether I should use same external voltage with output (connected with arduino) of 5V DC motors of 500 rpm or not?? I am using 6 Motors to run as per signal readings.
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Ramani Aswath

@ramani-VR4O43 • Apr 11, 2018

Is this the only signal? Are there other variables also being monitored? It is better to use independent supplies for the motors.
So long as there is a common ground, there should be no issues.
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