Limit switches used to trigger a sequence of actions in order are typically part of which circuit type?

• A. event sequencing circuit
• B. interlock circuit
• C. feedback circuit
• D. safety circuit

Answer: (A)

When limit switches are used to trigger a sequence of actions in a specific order, the system needs to advance from one step to the next only after the previous step has occurred. That behavior is exactly what an event sequencing circuit is designed to do: it responds to discrete events (like a limit switch closing) and moves the process along through predefined steps in the correct order. This keeps the overall operation coordinated and prevents steps from starting too early or out of sequence.

Interlock circuits are mainly about preventing unsafe combinations or states, blocking operations until safe conditions are met, rather than arranging a series of actions in order. Feedback circuits provide information from the output back to the input to adjust the process in a loop, rather than driving a sequence of steps. Safety circuits focus on stopping or isolating machinery to prevent hazards, not on sequencing actions. So the circuit type best suited for triggering actions in a defined sequence in response to limit switches is the event sequencing circuit.