How to read control panel wiring?

An electrical wiring diagram could be a single page schematic of how a ceiling fan should be connected to the power source and its remote switches.

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A wiring diagram may include the wirings of a vehicle. For example, how the horns are powered and connected to the controller on your steering wheel.

Or an electrical wiring diagram can be a 200-page document including all the electrical wirings of an electrical control panel in a huge factory or plant.

As some rules of thumb will be applied to most of the wiring diagrams, in Part 1 of this multi-part article you&#;ll learn how to read a wiring diagram by means of an actual industrial control panel&#;s wiring diagram.

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And in Part 2, you&#;ll learn how to read a PLC wiring diagram and its modules. 

Reading a PLC Wiring Diagram is one of the must-to-learn skills for every automation and electrical engineer. Despite different standards of these types of drawings, you&#;ll learn using actual industrial drawings and some PLC wiring best practices.

In Part 1 of this series, you&#;ve learned how to read and understand a wiring diagram of an industrial control panel and in this Part, we&#;re going to continue with the PLC part of that same control panel. In this article, you&#;ll learn about the PLC and its modules&#; wiring diagram. You&#;ll also see how a VFD is related to a PLC in a wiring diagram.

So, if you&#;ve missed Part 1, you may want to read that article first and come back and continue with this part.

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