DCC points & sections   programming track
  multi D pin key   viaduct DCC panel
  key to DIN plugs    viaduct DCC panel reverse
  viaduct drop down board    viaduct panel wiring table

  viaduct board wiring    

       The Harbour branch on the viaduct section is also the programming track. There are no other connections to electronics on this section. The toggle switch is fitted close to the Zephyr module.