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 21RQ

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Using tachometer to measure rotational speed:

  • Tachometer is a small AC or DC generator which converts rotational speed into voltage signal.
  • It develops an output voltage proportional to its rpm whose phase or polarity depends on the rotor’s direction of rotation.
  • The rotor of the tachometer is mechanically connected to the load...

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