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What is a passive transmitter repeater?

A passive transmitter repeater comprises an input for a 4 … 20 mA transmitter signal from a measuring transducer with a 2-conductor system. The measuring transducer obtains its entire supply via this 2-wire circuit.

The output is connected to the process control or a PLC at 4 … 20 mA. The passive transmitter repeater requires no additional voltage supply because the auxiliary energy is obtained from the feeder circuit without the results becoming falsified.

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