hope it's not too late for a reply: Actually I have over 50 pecos insulfrogs installed in my layout and all them needed no additional wiring! Work very well with DCC locos, diesel, steam and electrics, without fail. A superb turnout.
good luck!
I see that non one answered this. I'm not a pro, but there is a diagram on this page that explains it:
https://sites.google.com/site/sjsmrclub/home/module-specifications
Simon
Bought one of each above. They connect to each other going from one district to another. Maybe reading to much but confusing as to needing additional wiring, etc or not? Insulated joiners where? Read somewhere that no special wiring? And somewhere else about adding power feeders?
Thanks.