You can find soldered printed circuit board of DCC/MM2 shield as followings. Please refer to solder.
|Parts No.||Parts name||Specification|
|R1||Resistor||1k Ohm, 3mA(typ)|
|R2||Resistor||1k Ohm, 3mA(typ)|
|R3||Resistor||1k Ohm, 3mA(typ)|
|CN1||Connector||6pin Long header|
|CN2||Connector||8pin long header|
|CN3||Connector||8pin long header|
|CN4||Connector||8pin long header|
|CN5||Connector||2x3pin Long socket header|
|CN7||DC Jack||DC jack|
|IC1||IC Socket||28pin IC socket|
*1 LED polarity shows as the above image.
Please note the followings.
Insert DCC/MM2 shield to Arduino UNO or galileo gen2. Power on the Arduino. Connection of power supply uses Arduino UNO's DC input.
DCC/MM2 shield R5 has DC jack. As you know, Arduino board has also DC jack. You can use one of the both DC jack freely. These DC jacks are connected internal pattern. If you want to output higher current, you need to connect DC power supply to DC jack port of DCC/MM2 Shield. Do not use the DC jack of Arduino board then. Because DC power pattern of Arduino board is thin, Arduino board can't support high current. High current means 1.0 Amp or more.
In this case, we introduce connection of marklin's CTrack. If you use DC rail, the porality is free.
CTrack has the porarity. The porarity is written about the output connector. B means red wire and connects to center rail. O means brown wire and connects to both side rails.