Answer / jobby c johnson

Distance is not a limiting factor for current transmission(4-20mA) where as it is a limitation for voltage transmission. Because based on the resistance the signal seeing there will be a voltage drop. then the voltage signal available at the host end will not be same at the generating side. Based on the distance these deviation will be more.

Answer / sayuk

1000km

Answer / satya

it is depend on voltage drop between instrument and dcs,
beacuse resistance increases,minimum 80% of rated voltage is
allowed after that may be instruments showing wrong value .

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