Which of the following statements is not true of a ladder diagram?

A ladder diagram, commonly used in electrical and control engineering, visually represents a control circuit. The structure of a ladder diagram consists of two vertical "rails" and horizontal "rungs" which depict the control logic.

The assertion that a ladder diagram can have more than one output device on each rung is not typically accurate in the conventional interpretation of ladder logic. Each rung is designed to control a specific operation, typically culminating in a single output, representing a specific action or control function based on the logic of input devices. While it may be possible in some contexts to have multiple outputs represented, this is not standard practice and could complicate the logic unnecessarily.

The other aspects of ladder diagrams are accurately represented in the other statements. They indeed arrange wires in orderly rows to provide clarity, can incorporate multiple input devices per rung to enhance control logic complexity, and generally display input devices on the left side of the diagram for logical flow representation from power to output. This structure allows for a clear, easy understanding of the control process, enabling efficient troubleshooting and design practices in maintenance and engineering contexts.