In a ladder diagram, where are the input devices typically located?

In ladder diagrams, input devices are typically located on the left side. This convention aligns with the flow of electrical control systems, where power flow is represented from left to right. The left side of the diagram symbolizes the starting point of the control circuit, where input devices such as sensors, switches, and other triggering elements are positioned to detect conditions or user inputs. This arrangement allows for a clear understanding of how inputs initiate the sequence of operations or responses in the overall control system, setting the stage for the corresponding outputs that are typically represented on the right side of the diagram. Following this structure helps anyone reading the diagram to quickly identify where inputs are coming from and how they interact with the operational processes laid out in the diagram.