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Activities Manual for Programmable Logic Controllers
5th Edition
ISBN: 9781259679568
Author: Petruzella, Frank
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Question
Chapter 6, Problem 10RQ
Program Plan Intro
Switch:
- A switch refers to an electrical device which can make or break an electrical circuit.
- Switches can be operated manually or by some sensing element such as pressure, temperature, or flow.
- A switch consists of one or more sets of contacts that can be operated simultaneously, sequentially, or alternately.
Explanation of Solution
b.
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...
Explanation of Solution
c.
Break-make pushbutton switch:
- Break-before-make pushbutton is a switch whose top level section contacts are Normally Closed and bottom level section contacts are Normally Open.
- The top level contacts will open before the botto...
Explanation of Solution
d.
Three-position selector switch:
- In order to open and close the contacts of an attached contact block, a selector switch operator is rotated.
- The operator knob is turned to right or left to establish a switch position.
- Selector switch consists of two or more selector positions...
Explanation of Solution
e.
NO limit switch:
- Normally Open limit switch refers to a commonly used industrial control device.
- It is used to operate when a predetermined limit is reached.
- It is started by the contact with an object such as a cam...
Explanation of Solution
f.
NC temperature switch:
- NC temperature switch refers to a switch which is activated at specific temperature.
- Applications of temperature switches include maintaining the desired temperature range of solids, liquids, gases, or air...
Explanation of Solution
g.
NO pressure switch:
- NO pressure switch refers to a switch which is activated at specific pressure.
- It is used to control the pressure of gases and liquids...
Explanation of Solution
h.
NC level switch:
- NC level switch is designed to sense liquid level in vessel.
- It provides automatic control for motors which transfers liquids from sumps into tanks...
Explanation of Solution
i:
NO proximity switch:
- NC proximity switch does not need any physical contact to sense the presence or absence of a target.
- Here, any object such as vibrations, liquids, or chemicals near to the proximity switch range will respond and act as ON-OFF switch...
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The lights in a classroom are controlled by two switches: one at the back and one at the front of the room. Moving either switch to the opposite position turns the lights off if they are on and on if they are off. Assume the lights have been installed so that when both switches are in the down position, the lights are off. Design a circuit to control the switches
Simple Water Level Indicator with Alarm.
The circuit is designed to indicate three levels of water stored in the tank: low but not empty( Green(LED1)), half ( Yellow(LED2))and full but not overflowing(buzerr).
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Chapter 6 Solutions
Activities Manual for 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
Ch. 6 - Prob. 11RQCh. 6 - Prob. 12RQCh. 6 - Compare the operation of a photovoltaic solar cell...Ch. 6 - What are the two basic components of a...Ch. 6 - Prob. 15RQCh. 6 - Give an explanation of how a scanner and a decoder...Ch. 6 - Prob. 17RQCh. 6 - Prob. 18RQCh. 6 - Prob. 19RQCh. 6 - Prob. 20RQCh. 6 - Prob. 21RQCh. 6 - Prob. 22RQCh. 6 - Prob. 23RQCh. 6 - Prob. 24RQCh. 6 - Prob. 25RQCh. 6 - Prob. 26RQCh. 6 - Prob. 27RQCh. 6 - Prob. 28RQCh. 6 - Prob. 29RQCh. 6 - Prob. 30RQCh. 6 - Prob. 31RQCh. 6 - Prob. 32RQCh. 6 - Prob. 33RQCh. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Design a PLC program and prepare a typical I/O...Ch. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8P
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