I'm trying to find out if one Proto2 upgrade Master Board in a powered A unit can power two Proto2 upgrade slave boards in two powered B units ... might as well throw that into this confusion
Kerrigan;
I just received my slave kit today. I have skimmed through the manual and I can't see where there is any provision to drive two slave kits from one main PS-2 kit.
I suggest however that you contact MTH tech help and ask them the question to get a for-sure answer.
The kit does include a pass-through 10 pin harness for use with an unpowered B unit (or unpowered A unit) in between the two powered A units. You could also order an additional one if you wanted to run two unpowered B units I would think.
Just for info.
Rod