As shown in the illustrated block diagram...

As shown in the illustrated block diagram...

Question 1 of 270705eccefa5bacbc34ba4d48852

As shown in the illustrated block diagram for a programmable logic controller system, what functional component is used to convert the mains AC supply voltage to a low voltage DC? See illustration EL-0225.

Question 1 of 27070

Q

As shown in the illustrated block diagram for a programmable logic controller system, what functional component is used to convert the mains AC supply voltage to a low voltage DC? See illustration EL-0225.

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🔍 Key Concepts

• Typical roles of power supply modules in a PLC rack • Difference between I/O modules (inputs/outputs) and conditioning/conversion of supply power • How the mains AC supply is brought into a PLC system and then distributed as low-voltage DC

💭 Think About

• In the illustration, which labeled section is closest to where ship’s mains power would logically enter the PLC rack? • Do input and output modules normally power the whole PLC, or do they just interface field signals to the CPU? • Which of the listed components is specifically designed to change voltage and type of current (AC to DC), rather than to process logic or field signals?

✅ Before You Answer

• Identify which block in the diagram is explicitly labeled for power rather than for inputs/outputs or processing • Confirm that the chosen component’s main function is converting and conditioning incoming AC to a stable low-voltage DC bus for the rack • Make sure you are not confusing signal I/O modules (which handle field devices) with the module that feeds power to the entire PLC chassis