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- What are the distinguishing features of a "true" Fieldbus,
delivering the original promise?
The
main characteristics of Fieldbus are:
- Completely digital replacement of 4-20 mA;
- Control, alarm, computation and other functions
distributed to devices in the field;
- Multi-vendor interoperable through open specification;
- Specifically designed for process control;
- DCS/smart-transmitter and other protocols calling
themselves Fieldbus do not show these characteristics;
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