The power flow is taken to be from the left hand vertical across a rung. A ladder or line diagram is a diagram that shows the function of an electrical circuit using electrical symbols.
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Ladder wiring diagram. In drawing a ladder diagram certain seven conventions are adopted. Read the ladder diagram from left to right then up to down in order. The two vertical lines are called rails and attach to opposite poles of a power supply usually 120 volts ac. The loads in a ladder diagram are always and shall be connected in parallel on the rungs. Ladder diagrams sometimes called ladder logic are a type of electrical notation and symbology frequently used to illustrate how electromechanical switches and relays are interconnected. Convention 2 each rung on the ladder defines one operation in the control process.
Usually drawn like a ladder hence the name ladder diagram. The ladder diagram shown in figure 4 is easy to read since there are only two basic parts the rails and the rungs. The control circuit voltage is usually rated at 12v 120v depending on the rated values of the loads connected in the circuit. It does not show the actual locations of the components. 1a ladder diagram translates similarly to a book. Ladder diagrams allow a person to understand and troubleshoot a circuit quickly.
Therailsare the two dark vertical lines that represent the power source to the control circuit. Convention 1 the vertical lines of the diagram represent the power rails between which circuits are connected. The load is the last component connected to the right side of the rail unless.
Gallery of Ladder Wiring Diagram
