But intercoms have like everything else joined the digital age, so those two wires now carry ... Power for the system is present as a constant 24V DC, and the audio is still an old-fashioned ...

The flowmeter operated on a single, 4 - 20 mA HART two-wire loop, was remotely powered by a DC supply, was certified for use in Class I, Division 1 areas, and could be deployed in an intrinsically ...