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

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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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