Which coil type energizes when the input signal reaches the coil and de-energizes when the input does not reach the coil?

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

Answer: (D)

A non-latching coil energizes only while the control signal is present and drops out as soon as the signal is gone. It has no memory of previous signals, so it automatically returns to the de-energized state when input stops. This matches the description of energizing when the input reaches the coil and de-energizing when the input does not reach the coil.

The other options involve different behaviors: a set & hold maintains energization after the input is removed, a reset coil requires a separate action to release a latched state, and an inverse non-latching coil energizes when the input is absent (the opposite timing).