KCD2-STC-EX1 safety barrier wiring method
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The wiring diagram for KCD2-STC-EX1 is as follows: For the input side, two-wire instruments (that support HART communication) are connected to terminals 1 and 2； The four-wire instrument (supporting HART communication) is connected to terminals 3 and 4. Output terminal: Supports active and passive outputs; the output type is set via a DIP switch, as shown in the figure below
Strictly speaking, it should be said that the passive input is connected to terminals 1 and 2； The active input is connected to terminals 3 and 4. Some signals do not come from four-wire instruments; for example, signals from frequency converters in electrical systems, and signals from current transmitters.
I’ll learn* it, thanks to the original poster for sharing!