The MTLx544D provides a fully-floating dc supply for energising a
conventional 2- or 3-wire 4/20mA transmitter located in a hazardous
area, and repeats the current in other circuits to drive two safe-area
loads. For HART 2-wire transmitters, the unit allows bi-directional
transmission of digital communication signals superimposed on the
4/20mA loop current. Separately powered current sources, such as
4-wire transmitters, can be connected but will not support HART
communication.
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