I’m not sure. In the HO signal book (03402) there is this two page mention I found. it’s in the 76xxx Series Color Light Signals chapter. Maybe it’ll give some ideas?

If you are switching block sections automatically with Marklin 8599, I used some latching relays for the block sections, and added a manual override momentary switch on the control panel.


https://www.jaycar.com.a...hing-mini-relay/p/SY4060

Just think of the catenary as one of the rails which you would otherwise have block sections. It simply needs isolated sections (you can do that a number of ways) and power to feed each section, no different to the rail (only one rail). If the section is long maybe an additional feed. I probably would do two feeds per section anyway.


If you can't get your head around it, knock up simple a test track loop and wire that as 3 sections. Then that will be easy to replicate whether it is rail or catenary.

So you want the manual momentary switch or 8599 (or both) to switch a latching relay open for the previous section and also close the latching relay for the section before that.

Then repeat that wiring for however many sections (minimum 3).

I think once you can see it with some actual wires on a test track you will be ok.