A power station has a safety system controlled by a logic circuit. Three inputs to the logic circuit determine whether the output, S, is 1. When S= 1, the power station shuts down. The following table describes the conditions being monitored. Parameter Description Gas Temperature Water Temperature Reactor Pressure . . Parameter Binary Value OR • OR G Output S will generate a value of 1 if: EITHER R W 0 1 0 1 0 gas temperature > 160°C AND water temperature ≤ 120°C gas temperature ≤ 160°C AND reactor pressure > 10 bar water temperature > 120°C AND reactor pressure > 10 bar. (a) Produce a logic circuit and complete a truth table to represent the scenario. 1 Description of Condition gas temperature ≤ 160°C gas temperature > 160°C reactor pressure ≤ 10 bar reactor pressure > 10 bar water temperature ≤ 120°C water temperature > 120°C (b) Write down the Boolean expression to represent the logic circuit you drew up. (c) Simplify the Boolean expression using the Boolean algebra rules. NOTE: You may use the Karnaugh Map to check your answer.

A power station has a safety system controlled by a logic circuit. Three inputs to the logic circuit determine whether the output, S, is 1. When S= 1, the power station shuts down. The following table describes the conditions being monitored. Parameter Description Gas Temperature Water Temperature Reactor Pressure . . Parameter Binary Value OR • OR G Output S will generate a value of 1 if: EITHER R W 0 1 0 1 0 gas temperature > 160°C AND water temperature ≤ 120°C gas temperature ≤ 160°C AND reactor pressure > 10 bar water temperature > 120°C AND reactor pressure > 10 bar. (a) Produce a logic circuit and complete a truth table to represent the scenario. 1 Description of Condition gas temperature ≤ 160°C gas temperature > 160°C reactor pressure ≤ 10 bar reactor pressure > 10 bar water temperature ≤ 120°C water temperature > 120°C (b) Write down the Boolean expression to represent the logic circuit you drew up. (c) Simplify the Boolean expression using the Boolean algebra rules. NOTE: You may use the Karnaugh Map to check your answer.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter4: Symbols

Section: Chapter Questions

Problem 3SQ: What do the following abbreviations stand for? a. SPST b. SPDT c. DPST d. DPDT e. NO f. NC

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