Following the Emerald Night, the new 88002 Power Functions-compatible train motor and controller were introduced in two 2010 sets, the 7938 Passenger Train and 7939 Cargo Train. This new motor utilized the universal Power Functions connections, used by all components. The standardization of the Power Functions system meant that any of the motors in the Power Functions line could be used and builders were not limited to using a single type of motor as they had been with previous Lego train systems.