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The document discusses the differences between various industrial control systems including SCADA, HMI, RTU, DCS, and PLC. SCADA systems control PLCs from a supervisory level and collect live data for display and storage. HMIs allow operators to interact with control systems through graphical interfaces. RTUs process input/output from field devices and connect to SCADA or DCS systems. DCS systems use multiple strategically placed controllers with redundant networks for maximum uptime in critical processes.

Author

geraldo

Language

EN