Which coil operation energizes once the signal reaches the coil and remains de-energized until Set & Hold coil is activated (Memorized OFF)?

Which coil operation energizes once the signal reaches the coil and remains de-energized until Set & Hold coil is activated (Memorized OFF)?

• A. Reset Coil
• B. Set & Hold
• C. Non-Latching Coil
• D. Inverse Non-Latching Coil

Answer: (A)

When a relay uses memory behavior, you’ll often separate the actions of setting and resetting the stored state. The description here points to a reset function that drives the stored state to OFF when input arrives, and then stays inactive until the set path (Set & Hold) redefines the state. The reset coil is energized by the incoming signal to force the memory to OFF. Once that reset action has done its job, the coil remains de-energized until the Set & Hold path is activated, which then allows the latch to be set again. In a memorized OFF arrangement, this clear separation—activate reset to turn the memory OFF, then rely on Set & Hold to re-establish ON—matches the described behavior. A non-latching coil would only be energized while the input is present and wouldn’t provide stored OFF behavior. An inverse non-latching coil would energize under opposite input conditions, not align with the described memorized OFF state. A Set & Hold coil by itself is meant to maintain a ON state after being set, not to drive OFF in response to an input. So the reset coil best fits the scenario.

When a relay uses memory behavior, you’ll often separate the actions of setting and resetting the stored state. The description here points to a reset function that drives the stored state to OFF when input arrives, and then stays inactive until the set path (Set & Hold) redefines the state.

The reset coil is energized by the incoming signal to force the memory to OFF. Once that reset action has done its job, the coil remains de-energized until the Set & Hold path is activated, which then allows the latch to be set again. In a memorized OFF arrangement, this clear separation—activate reset to turn the memory OFF, then rely on Set & Hold to re-establish ON—matches the described behavior.

A non-latching coil would only be energized while the input is present and wouldn’t provide stored OFF behavior. An inverse non-latching coil would energize under opposite input conditions, not align with the described memorized OFF state. A Set & Hold coil by itself is meant to maintain a ON state after being set, not to drive OFF in response to an input. So the reset coil best fits the scenario.