Which collection includes Non-Latching Coil, Inverse Non-Latching Coil, Set & Hold coil, and Reset coil?

• A. Power Supply Types
• B. Coil operations of a ladder diagram
• C. Input Devices
• D. Output Devices

Answer: (B)

This question tests your understanding of coil operations within ladder logic. In ladder diagrams, a coil represents the action that occurs when a rung is satisfied: it controls an output or a memory bit. The non-latching coil is the standard energize-on-condition type. The inverse non-latching coil energizes when the rung condition is not met (the inverted behavior). The Set & Hold coil is used to latch a state—once set, it remains on even if the rung goes false—until a Reset coil clears it. The Reset coil explicitly clears that latched state. Together, these terms describe how coils behave and are manipulated inside ladder diagrams, which is why they belong to the category of coil operations of a ladder diagram. They aren’t about power supplies or generic input/output devices, but about how coils operate within the ladder logic framework.