What is commonly used to visualize a sequence of operations in relay logic?

Ladder diagrams are commonly used to visualize a sequence of operations in relay logic because they effectively represent the control logic in a format that mirrors the layout of electrical relay circuits. The design resembles a ladder, with vertical "rails" representing the power supply and horizontal "rungs" depicting the various control elements, such as relays, switches, and other devices.

This visual format makes it easier for electricians and engineers to understand the operation of the control system at a glance. Each rung corresponds to a specific operation or condition, allowing for straightforward interpretation of how the relays are interlinked and how they operate in sequence. This clarity is essential for troubleshooting and modifying the control logic in a system.

While flowcharts are also useful for representing processes, they do not specifically cater to the electrical and relay logic context in the way ladder diagrams do. PCB designs focus on the layout of printed circuit boards rather than relay logic, and wiring diagrams provide details about electrical connections but do not convey the functional sequence as effectively as ladder diagrams. This makes ladder diagrams the preferred tool for visualizing relay logic sequences.