Hello,

I need the center rail power to be able to put an IR transmitter in the trailer of my 3676. The trailer is connected to the driving unit with a 5-pole band cable that contains chassis, function return and three wires for the lights. I tried to pull an extra wire, this is possible but it is difficult to attach the wire to the coupler in a reliable way. I thought of another idea: I could use the function return wire, and then create a new function return in the trailer like this: http://home.swipnet.se/perz/funcret.gif . Is this a good idea, or am I doing something stupid ?

The IR transmitter I want to mount uses track power directly. It doesn't use a function output from the decoder. The problem is that the center rail connection is not available in the trailer. There are three decoder functions used in the trailer: front light, rear light and inner light. These functions now have their return through the "orange" wire (although it is actually red in this case).

If i re-wire the "orange"(i.e. red) wire as center rail power instead, to supply the IR transmitter with power, I no longer have a function return wire for the functions. I could use chassis as function return of cause, but that gives a terrible flickering.

I think it is possible to re-create a flicker-free function return in the way that I showed in the figure in the previous post, but I'm not 100% sure that this is correct.