The adapter board for decoders with 21MTC/21PIN interface is suitable for anyone who wants to quickly digitize their locomotives and equip them with many functions quickly. All outputs according to VHDM or NEM standard are available as solder connections.

Also if you want a smaller size you can break off the extra board with screw hole.

21-Pin MTC to 8-Pin DCC Plug Adaptor Pin-out & Wiring Diagram

Pin7=Yellow=Rear Lights

Pin8=White=Head lights

Pin9=White=Speaker

Pin10=White=Speaker

Pin13=Voilet=Aux2

Pin14=Green=Aux1

Pin15=Blue=DC+

Pin17=Grey=Motor Left

Pin18=Orange=Motor Right

Pin20=Black=Left Rail

Pin21=Red=Right Rail

21MTC Interface do not have PIN11