An automatic pendulum operation on a secondary track enlivens any model railway layout. When the train reaches its stopping area, it is sent back on its journey in the opposite direction after the set waiting time. When the train enters the separation section, it stops according to the set time and then returns to the other end of the track. The necessary polarity reversal for the change of direction occurs automatically with this module. No external contacts are required. Operating voltage is 12 - 18 V AC/DC. Adjustable time is approximately 8 seconds to 1.5 minutes. The connection is made to the train transformer. The module is pre-assembled and tested for connection.