What does Net A and Net B on the Smartpack Wallmount I/O card reference

Explanation

Net A and Net B reference the + and - landings for Smartlink runs. You get two pairs of Net A and Net B on a header in the I/O card, A being + and B being -, each pair being used for a run from the rack to either Smartlink stations or another Smartpack that you want to be on the same Smartlink bus.