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

Question 1 / 2066636eee28f7522a1c51f30a

Question 1 of 2066636eee28f7522a1c51f30a

As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output system block "DIGITAL CONTACT" represent? Illustration EL-0095

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Question 1 of 20

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🔍 Key Concepts

• Digital contact vs. analog A/D blocks in the INPUT system of the diagram • What a binary device sensor (on/off switch, limit switch, pressure switch) sends to the control system • Difference between converting a signal (A/D or D/A) and conditioning a signal that is already digital

💭 Think About

• Look at where the DIGITAL CONTACT block is located: is it in the analog path or the binary/on‑off path? What does that tell you about the type of signal it handles? • If a sensor is already sending a digital (on/off) signal, do you need to convert it to analog, or just interface/shape it so the CPU can read it cleanly? • Which answers talk about analog anywhere near the DIGITAL CONTACT block? Should DIGITAL CONTACT have anything to do with analog signals at all?

✅ Before You Answer

• Verify that the DIGITAL CONTACT block is in the input system and is separate from the Analog A/D block. • Eliminate any option that involves analog signals for the DIGITAL CONTACT path, since binary contacts are inherently digital. • Focus on the option that describes taking digital outputs from binary device sensors and preparing/conditioning them so they can be read directly as digital data by the CPU.

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Question 1 of 20

It receives digital outputs from the binary device sensors and converts these to analog signals for CPU processing.

It receives analog outputs from the analog device sensors and converts these to digital signals for CPU processing.

It receives analog outputs from the analog device sensors and conditions these as analog signals for CPU processing.

It receives digital outputs from the binary device sensors and conditions these as digital signals for CPU processing.

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Question 1 / 2066636eee28f7522a1c51f30a

Question 1 of 2066636eee28f7522a1c51f30a

Back

Question 1 of 20

66636eee28f7522a1c51f30a

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

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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