PROGRAMMABLE LOGIC CONTROLLERS (LL)
5th Edition
ISBN: 9781260844146
Author: Petruzella
Publisher: MCG
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Question
Chapter 6, Problem 2P
Program Plan Intro
Break-make pushbutton switch:
- Break-before-make pushbutton is a switch whose top level section contacts are Normally Closed (NC) and bottom level section contacts are Normally Open (NO).
- The top level contacts will be opened before the bottom level contacts get closed when the pushbutton is pressed.
- An electrical symbol used to represent break-make pushbutton switch is given below.
Given:
The conventional hardwired relay circuit should perform the following circuit functions when two break-make pushbuttons are used.
- The light L1 must turn ON when pushbutton PB1 is pressed.
- The light L2 must turn ON when pushbutton PB2 is pressed.
- The pushbuttons must be interlocked electrically, such that L1 and L2 cannot be turned ON simultaneously.
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Chapter 6 Solutions
PROGRAMMABLE LOGIC CONTROLLERS (LL)
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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