Ladder Diagrams -
Ladder diagrams are also called line diagrams or elementary diagrams.Ladder diagrams are used to represent the function of the control control circuit and associated devices but they dont show the components of the control circuit and their actual physical positions.As control circuit becomes more complex a ladder diagram can be less complicated to read than a wiring or connection diagram. Connection diagrams or wiring diagrams shows the components of the control circuit in a resemblance of their actual physical location.