A refinery uses an integrated system with redundant controllers, a unified engineering database, and tightly coupled regulatory control loops all confined within one plant footprint. This architecture is most accurately described as which of the following?
- A.RTU network
- B.Distributed Control System
- C.Telemetry SCADA
- D.Building management system
Why B is correct
A Distributed Control System (DCS) centers on process control inside a single facility, emphasizing closed-loop regulatory control across many process areas. Its tight integration and local communications distinguish it from the wide-area focus of SCADA.
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