MX9V is a really incredible product to manage the track layout.
Moreover there is a misiing function in order to manage multi aspect light signal.
Also the connection of specific decoder (e.g. viessmann 4413 + 5223) seems does not operate fully.
Someone has implement MX9V + MX9ALA using light and occupancies connectors to automatic manage multi aspect signal?
I think could also achieved without computer control.
MX9 operate giving red signal in case the section MAIN+1 is occupied.
If the train pass over MAIN+1 (so occupancy for MAIN+2) The signal in MAI will be green and the signal in MAIN+1 red.
If the red connector for signal in MAIN+1 will be bridged to the yellow led of signal in MAIN section you will obtain:
MAIN signal green+yellow
It seems correct.