From the course: Electrical Systems: Reading Drawings and Schematics
Join today to access over 22,600 courses taught by industry experts or purchase this course individually.
How ladder logic works
From the course: Electrical Systems: Reading Drawings and Schematics
How ladder logic works
- [Instructor] Now that we've talked about the components of a ladder diagram, let's see one in action. Here's our basic ladder diagram. 120 volts is applied between the two rails. When this push button is applied, it closes this circuit or rung and it'll activate this control relay. Whatever's attached to that control relay will be working. Here's another ladder diagram. This one will apply 120 volts to the rails. Now, we'll press the start A button. That will close the circuit or rung across the top and start the control relay. If the stop button is depressed, it'll effectively open this circuit. Electricity will not be able to go across at all and control relay one will not be active. If the stop is reset and start B is depressed control relay one will start up once again. If the stop is pressed again, control relay one will go off because again the electricity has been broken through the circuit.
Download courses and learn on the go
Watch courses on your mobile device without an internet connection. Download courses using your iOS or Android LinkedIn Learning app.