Sorry it's taken longer to get a doc sorted then i wanted.
On the cost bases it's the old numbers game, small batches cost sadly, but working on getting the price down, at the moment
the bigger one, 6x ir,4x 232,1x485,4x relay,4 x io is in the $500 ( i know!)
What would be a great help is if you guys could tell me what type of interface and numbers of them on a box and maybe we can
come up with something, it maybe I'm sticking on loads you don't want/need and not adding things your dreaming of!.
I have a light interface document for people to have a look at, it's very simple, can i post it here or should i just put a link to it?