why does mA signal preferred for signal transmission?
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Answer Posted / vipul joshi mfl
The voltage will drop at the length of the cable but in the
case of mA the current will not drop at the receiver end so
we preferred the current as a signal transmission and for
4-20 mA it is preferred cause the 4 mA is a signal we use as
a zero value if we use 0-12 or 0-20 mA then if any break in
cable was there, we cannot judge.
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