What is two wire system and how it work

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What is two wire system and how it work ..

Answer / amit

two wire system means power supply of instrument and signal
output both communication coming through 2 wire only.

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What is two wire system and how it work ..

Answer / asim

By 2-wire it means the transmitter is powered form the
system to which it is connected... normally 24VDC and 4-
20mA signal is connected to the control system using only
one single pair of wires.

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