Explain Electrical Ladder Diagrams | Sciencing Ladder diagrams are used to depict electronic control circuits in a simple form. These schematic diagrams resemble a ladder with rails and rungs. Special symbols are used to show the different components depicted on the diagram. Ladder Diagram Basics #1 - YouTube Click to view on Bing15:02How to draw Ladder Diagrams Did this video help you? Care to say thanks: paypal/PeteVreeAuthor: Pete VreeViews: 360K “Ladder” Diagrams | Ladder Logic | Electronics Textbook NomenclatureOperationExampleEffectsSafetyThe L1 and L2 designations refer to the two poles of a 120 VAC supply unless otherwise noted. L1 is the hot conductor, and L2 is the grounded (neutral) conductor. These designations have nothing to do with inductors, just to make things confusing. The actual transformer or generator supplying power to this circuit is omitted for simplicity. In reality, the circuit looks something like this:See more on allaboutcircuits Ladder Logic Tutorial for Beginners - PLC Academy The smart thing about ladder logic is that it looks very similar to electrical relay circuits. So if you already know a little bit about relay control and electrical circuits, you can learn ladder logic even faster. In this ladder logic tutorial you will learn everything you need to know about the ladder diagram PLC programming language. What is Ladder Diagram Programming ? | Basics of PLC | PLC Ladder Diagram (LD) Programming. The most common language used to program PLCs is Ladder Diagram (LD), also known as Relay Ladder Logic (RLL). This is a graphical language showing the logical relationships between inputs and outputs as though they were contacts and coils in a hard-wired electromechanical relay circuit.