PROGRAMMABLE LOGIC CONTROLLERS (LOOSE PA
PROGRAMMABLE LOGIC CONTROLLERS (LOOSE PA
5th Edition
ISBN: 9781264206216
Author: Petruzella
Publisher: MCG
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Chapter 6, Problem 8RQ

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Comparison on the method of operation of different switches:

Based on the operational point of view, switches are divided into three types as follows:

  • Manually operated switch
  • Mechanically operated switch
  • Proximity switch
Manually operated switchMechanically operated switchProximity switch
Manually operated switches are controlled by hand.Mechanically operated switches are automatically controlled by parameters such as pressure, position, or temperature.Proximity switches does not need any physical contact to sense the presence or absence of a target.
These include toggle switches, pushbuttons switches, selector switches, Push button switches are most commonly used as manually operated switches...

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