Faller car system

Welcome to this site Rudy. Sadly I have not a clue about this Faller system, and a quick search suggests that the last active interest was in 2017 from someone we haven't heard from lately.

I think you might do best if you post this question in the HO forum, where there is most likely to be some know-how. HTH

The analogue cars just have a reed switch, so not sure how this interface could communicate!

I had a quick look at Faller's web page for this product - PC-standard module and had a quick read of the manual from here:
https://medien.faller.de/xs_db/DOKUMENT_DB/www/anleitungen/161351_anl_01.pdf

It looks to me like the 12 outputs are for switching things like the Branch-off junction and equivalent stop and bus stop solenoids. You could probably control the traffic lights as well.

The 11 inputs would read these sensors - 3 Sensors.

The PC would run software to check the inputs to detect a magnet equipped car and the program the stop functions or whatever to suit.

There is no direct connection to the cars so far as I can tell.

David