The BR 03.10 shows the conversion of an analog Märklin locomotive using our own adapter for PluX22 and the CTC-Loco-Module-M3.

Note: There is also a YouTube video for this conversion.

The locomotive body is opened by removing the screw on top at the center of the boiler. The tender is non-functional, meaning there is no rear light either.

For this conversion, the "Adapter board PluX22" and the "Conversion kit Analog" are used. The CTC-Loco-Module-M3 with PluX22 plug is used as the locomotive module.

The wiring diagram then looks like this:

From the locomotive conversion kit analog, the two black diodes for the field coil and one of the two blue diodes for the headlight are required. They are plugged into the adapter board and then soldered. It is essential to pay attention to the position of the marking ring (see image).

A choke is attached to the side of the motor that is not connected to the field coil.

Next, we solder the cable from the headlight to the adapter board.

Finally, the buffer capacitor is soldered (plus orange, minus black).

The cables are:

• Center conductor red
• Field coil left/right grey
• Choke on the motor green
• Capacitor orange (plus pole) and black (minus pole)

The IR receiver is placed at the very front of the locomotive body. The hole in the body is large enough, meaning we can solder the IR receiver to the cable before threading it through.

Now the CTC-Loco-Module-PluX22 can be plugged onto the adapter and then the IR receiver onto the locomotive module:

Before reassembling the locomotive, we place it on a roller test stand. There we configure the locomotive module and test whether everything works.

Light configuration

In contrast to the normal PluX22, the plus pole is switched for the light. Therefore, we now need to remove the light (Light-conn) in the locomotive's config and instead insert "Driving light on 2x HalfBridge high (each 1 lamp)" from universell-loks.xml and connect it.

See also the section "Light configuration" from the conversion of the BR53 .