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

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Question 1 of 2066636eee28f7522a1c51f2f5

As shown in figure "B" of the illustrated block diagram for a central operating system configured for supervisory control, what is becoming the industry standard for transmission of analog signals for a measured variable? Illustration EL-0094

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Question 1 of 20

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🔍 Key Concepts

• Supervisory control input subsystem signals from sensors to controllers • Difference between voltage signals and current loop signals for long cable runs • Why control systems prefer a signal that clearly indicates open circuit / failed sensor

💭 Think About

• Look at how the measured variable leaves the sensors and travels back through the system. For long runs in a noisy engine room, would a voltage signal or a current signal hold its accuracy better? • Which of the listed ranges is commonly described in electronics/controls as an industry‑standard process control signal used by transmitters and PLCs? • Think about which range allows the system to detect a broken wire because the normal operating band never includes zero.

✅ Before You Answer

• Identify which option represents a current range rather than a voltage range • Ask which range you have seen associated with industrial transmitters and PLC/automation inputs • Verify which range leaves a non‑zero minimum value so that a reading of zero can clearly mean a fault or open circuit

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