i'm trying to communicate the stoeber posisyn sds 4021 servo inverter and the pci ni-can card via serial cable. the problem is that 1 RxD and 2 TxD pins dont have any connection available on the can card.
it is important to connect these pins somewhere or can_l and can_h do all the job?
what about the v- terminal, it is possible to connect it in grnd and leave v+ with 8v?