Which coil operation energizes once the signal reaches the coil and remains energized until the Reset Coil is activated (Memorized ON)?

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

Answer: (A)

Memorized ON is a latch behavior. When the signal reaches the coil, a Set action energizes the coil and a holding path keeps that current flowing even after the input drops. This Set & Hold arrangement creates a latched state: the output stays energized until the Reset Coil is energized to break the hold and reset the coil. The hallmark is the coil remaining on after the input is gone, until a reset occurs.

Other options don’t produce this memory behavior: a non-latching coil only stays energized while the input is present, and an inverse non-latching coil responds to the absence of input. The Reset Coil by itself doesn’t create memorized ON; it serves to clear the latch.