As shown in figure "A" of the illustrated...

Question 1 / 270705eccefa5bacbc34ba4d48858

Question 1 of 270705eccefa5bacbc34ba4d48858

As shown in figure "A" of the illustrated PLC sub-circuit, what type of circuit is depicted? Illustration EL-0230

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Question 1 of 27070

As shown in figure "A" of the illustrated PLC sub-circuit, what type of circuit is depicted? Illustration EL-0230

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Note the title of the diagram: Discrete PLC Input Modules and how that narrows which choices are possible. • Look closely at the components in figure A, especially the rectifier bridge and optoisolator, and think about what kind of signal needs rectification. • Compare figure A to figure B and notice which one has extra components to handle a changing (alternating) polarity.

💭 Think About

• Which two answer choices can you eliminate immediately based on the word Input printed on the diagram? • Why would a PLC module include a rectifier bridge ahead of the optoisolator—what kind of external signal would require conversion before it can drive 5 V logic? • Between AC and DC, which one changes polarity so that you’d want the input to work regardless of which way the external voltage is swinging?

✅ Before You Answer

• Confirm whether the module is clearly labeled as an input or output in the dashed box around the circuit. • Verify that a rectifier bridge is normally used to convert AC to DC so internal electronics see only one polarity. • Double‑check that the optoisolator is feeding a 5 V logic to PLC CPU line, reinforcing that this is an interface from field signal to the CPU, not from CPU to a load.

Question 1 of 27070

As shown in figure "A" of the illustrated PLC sub-circuit, what type of circuit is depicted? Illustration EL-0230

AC input unit

AC output unit

DC input unit

DC output unit

Question 1 / 270705eccefa5bacbc34ba4d48858

Question 1 of 270705eccefa5bacbc34ba4d48858

As shown in figure "A" of the illustrated PLC sub-circuit, what type of circuit is depicted? Illustration EL-0230

Back

Question 1 of 27070

As shown in figure "A" of the illustrated PLC sub-circuit, what type of circuit is depicted? Illustration EL-0230

If the question has a related picture, it will appear here.