CyberCertPrepOT Security FundamentalsOT Fundamentals: ICS/SCADA BasicsEASYFree question
Field technicians replace an aging remote site device that aggregates sensor inputs at an unmanned valve station and transmits them to the master station, yet performs little local regulatory control on its own. Which device did they replace?
- A.HMI
- B.Remote terminal unit
- C.Programmable logic controller
- D.Engineering workstation
Why B is correct
A Remote Terminal Unit (RTU) collects field data and relays it back to a master station, historically with limited local control logic. PLCs offer more robust on-site programmable control, while RTUs are favored at distant, low-power telemetry sites.
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