Title: Lab 3-8: Two Start/Stop Stations and Two Motors With a Shared E-Stop
Course: Electrical Motor Controls (Sandbox) > Section: Module 3: Common Control Circuits, 20 hr

Introduction

Now that you know how to build a circuit that causes a motor coil to become energized and then de-energized via "Start" and "Stop" buttons, you will build a circuit that causes two motor coils to become energized and de-energized. You will include an emergency stop button in this circuit.

Note: Your trainer only has two NC buttons that we use for our "Stop" buttons. For the emergency stop button, use the "E-Stop" button on the box that has the maintained push buttons and buzzer, as is shown in the picture below. If your trainer is not equipped with an "E-Stop" button, then you may use the NC side of one of the limit switches.

The following video will walk you through the steps of building the circuit according to the schematic shown below.

Lab Instructions

1. Watch the video introduction to this lab.
2. Draw a schematic diagram, in Automation Studio or by hand, that represents a circuit that will operate as described above. Make sure your circuit works in simulation before moving on to the next step.
3. Unplug the Motor Controls trainer.
4. Build the circuit on the Motor Controls trainer.
5. Plug in and turn on the Motor Controls trainer.
6. Test the circuit.
7. The motor coil M1 is energized when a user presses and then releases the "Start 1" button. It remains energized until the "Stop 1" button is pressed or the overloads are tripped. The motor coil M2 is energized when a user presses and then releases the "Start 2" button. It remains energized until the "Stop 2" button is pressed or the M1 overloads are tripped. When the emergency stop button is pressed, both coils de-energize.

Submission

To complete this lab, submit a 30-second video following the criteria found in the rubric. If you are working with another student, each of you must record and submit your own video.

Unless specified otherwise, any and all work on this lab page is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.