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[FAQ] What is a 3-wire 4-20mA current transmitter?
A 3-wire transmitter can be used with a local supply to transmit control data to remote devices. One wire is connected to the local supply of the transmitter. A second wire connects the shared ground of the transmitter and receiver. The third wire carries the analog output signal. The attached blog series will provide an overview and explain the design considerations of 3-wire systems.
