Lesson 6

16 Homework 6

Josh Hanson

  1. Complete the table below
    Problem 1 schematic
R1 R2 R3 R4 R3//R4 Total
E 10V
I
R 200Ω 300Ω 400Ω 400Ω

 

  1. Create a truth table based upon the ladder diagram below:
    Problem 2 schematic

 

  1. Create a truth table based upon the ladder diagram below
    Problem 3 schematic

 

  1. Draw a ladder diagram of a 2-wire circuit using a temperature switch.

 

  1. Draw a ladder diagram of a 3-wire circuit using 2 E-Stops

 

  1. I thought that I wired up the circuit shown below. As soon as I plugged the circuit in, the motor starter coil immediately energized and pulled-in. When I push either STOP button, the coil will de-energize. Give at least two things that could be wrong.
    Problem 6 schematic

 

  1. I wired up another motor starter, identical to the circuit shown in problem #6. I am 100% sure that all of the wiring is correct. When I plug my circuit in, nothing happens (which is how it should be, right?), but when I press either START button, the coil will not energize. What could be causing this problem? Give at least two things that could be wrong.

 

  1. Using the same circuit that’s shown in problem #6, what voltage should I measure across the coil when it is energized? (Zero, Ghost, or Source)

 

  1. Using the same circuit that’s shown in problem #6, what voltage should I measure across any of the START pushbuttons when the coil is energized? (Zero, Ghost, or Source)

 

  1. How can using a 2-wire circuit be dangerous?

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Troubleshooting Motors and Controls by Josh Hanson is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted.

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