How many minutes are required for DP trains to reset PCS on DP remote units?

The correct answer, indicating that 2 minutes are required for Distributed Power (DP) trains to reset the Power Control System (PCS) on DP remote units, aligns with standard operating procedures in freight train operation. In the context of DP trains, the reset process for the PCS is essential for ensuring that the remote units communicate effectively with the lead unit and maintain appropriate brake functionalities.

This reset time is vital, as it allows the systems to fully reinitialize and establish safe and effective communication before the train can proceed. Adequately timing this reset is crucial for maintaining train safety and operational efficiency, especially considering the complexities introduced by remote control of additional units.

The other options do not align with established protocols regarding the time necessary for a proper and thorough reset, which is why they are not the correct choice. The 2-minute timeframe is established to ensure both safety and operational reliability in train handling procedures.