CyberCertPrepOT Security FundamentalsOT Fundamentals: ICS/SCADA BasicsEASYFree question

A protective relay in a substation independently senses fault current, executes its own trip logic, and reports status over a digital protocol without needing a central controller. This self-contained, microprocessor-based device is best categorized as which of the following?

A.Dumb sensor
B.Human-machine interface
C.Intelligent electronic device
D.Master terminal unit

Why C is correct

An Intelligent Electronic Device (IED) embeds processing, protection logic, and communications in a single unit, common in electrical substations such as protective relays and meters. Its onboard intelligence sets it apart from passive sensors.

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A protective relay in a substation independently senses fault current, executes its own trip logic, and reports status over a digital protocol without needing a central controller. This self-contained, microprocessor-based device is best categorized as which of the following?

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A protective relay in a substation independently senses fault current, executes its own trip logic, and reports status over a digital protocol without needing a central controller. This self-contained, microprocessor-based device is best categorized as which of the following?

Where this fits in the OT Security Fundamentals exam

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One question down. Thousands to go.