Two-Wire Technology (2-Wire Technology)

Of the two wires on a pressure gauge or temperature sensor in 2-wire technology, one is connected to the supply voltage while the other delivers the electrical output signal to the pressure transmitter. The output signal is usually positive and thus needs to be connected to the plus terminal of the pressure transmitter. The minus pole then needs to be connected to the earth terminal, or ground terminal, in order to close the circuit.

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