What is the protocol regarding the Door Enabler before a train stops?

The protocol regarding the Door Enabler is that it can only be activated when the train has come to a complete stop. This is crucial for ensuring the safety of passengers as it prevents doors from opening while the train is still in motion, which could lead to accidents or injuries. By requiring the train to be fully stopped before activating the Door Enabler, the system helps maintain a controlled environment when passengers are boarding or alighting. This practice aligns with safety regulations that prioritize passenger well-being and secure operations on the rail system.

Options that suggest activating the Door Enabler while the train is still moving, whether as an approach to a station or at any time, do not comply with safety protocols and could endanger passengers. Similarly, limiting its use strictly to emergency situations misunderstands the regular operational procedures designed to maintain safety during routine stop scenarios.