Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 6, Problem 1P
Program Plan Intro
NC pushbutton switch:
- The abbreviation NC stands for a Normally Closed pushbutton switch.
- It will be initially at closed contact and will be opened when the switch or coil is energized.
- It opens a circuit when it is pressed and return back to its closed condition when it is released.
- An electrical symbol used to represent NC pushbutton switch is given below
Given:
The conventional hardwired relay circuit should perform the following circuit functions when a NC pushbutton is pressed.
- The pilot light must be switched ON.
- The solenoid must be de-energized.
- Motor running should be started.
- Sound a horn.
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Chapter 6 Solutions
Programmable Logic Controllers
Ch. 6 - Prob. 1RQCh. 6 - Prob. 2RQCh. 6 - Prob. 3RQCh. 6 - Prob. 4RQCh. 6 - Prob. 5RQCh. 6 - Prob. 6RQCh. 6 - Prob. 7RQCh. 6 - Prob. 8RQCh. 6 - What do the abbreviations NO and NC represent when...Ch. 6 - Prob. 10RQ
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