Hi John /Nigel
i can now confirm following your advice and guidance i have successfully set up signal operation via the cobalt with the aid of your last diagram
Unfortunately im not having much success with the abc braking, having competed the wiring as in above diagram soldering the feds 1 and 2 to the track via the bm1 module and connecting back to the cobalt via terminals 5 and 6 have also cut the track for the isolation sections.
Selected a Bachmann class 20 loco with a ESU v4 chip for the test and turned on cv 27 = 1 slow approach cv 123 = 100 (default) abc sensitivity cv 134 = 12 (default)
Started test, set signal for spad protection and to my dismay the loco did not respond, back to the program track to check cv changed bm1 module changed loco no luck.
Have only connected the approach for one side of the point for testing.
The only difference i can find is in your diagram you show the feds to the track bus as red in the direction of travel where as mine are black in the direction of travel and it states in the lenz instructions always connect to the right hand track in the direction of travel, there is no mention of polarity.
Would be good if you could help kick me over the line with this issue.
Regards Richie