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why 4-20 mA signal is preferred over a 0-10V signal
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Answer Posted / ibrahim s
0-10V :-
1. Voltage droup occurs.
2. Not able to find open circuit(Normally the circuit in
open condition o/p is "0", In 0-10V signal level starts
from 0V itself, so that can not able to find open circuit
easily)
3. Noise interference is high.
4-20mA :-
1. Easy to find the open circuit(because this signal level
starts from 4mA, if the circuit in open the output shows
0mA, so we can find easily the open circuit) .
2. Less noise interference.
3. Current measures remain same in any point of the signal
line.
So that 4-20mA is preferred over 0-10v
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