Analog input 0/4 to 20 mA

The isolating power supplies are used for the intrinsically safe operation of 2-and 3-wire transmitters and for connecting to intrinsically safe mA sources.

The 2- and 3-wire transmitters are supplied with auxiliary power from the transmitter supply unit.

For 2-wire transmitters the isolators transfer the HART communi-cation signal bidirectionally.