A petrochemical site needs tightly coupled continuous control with redundant controllers on one campus. A pipeline firm supervises 300 remote stations over a WAN. Which architecture fits each?
- A.DCS for the campus site with SCADA for the pipeline
- B.Standalone PLCs for both sites with no supervisory layer
- C.Historians for the campus site with PLCs for the pipeline
- D.Engineering workstations running both sites directly
Why A is correct
A DCS integrates controllers and operator stations for a single process facility while SCADA is designed for geographically dispersed assets reached over telemetry links. Historians and workstations do not perform control and standalone PLCs lack supervision.
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