High-Speed-CAN hardware have a 9-pin male D-SUB (DB9) connector for each port. The 9-pin D-SUB connector follows the pinout recommended by CiA DS 102.
CAN_H and CAN_L are signals lines that carry the data on the CAN network. These signals should be connected using twisted-pair cable. V– serves as the reference ground for CAN_H and CAN_L. V+ supplies bus power to the CAN physical layer if external power is required. All High-Speed Series 2 PCI, PXI, and USB hardware is powered internally, so it is not necessary to supply V+, unless you have configured the VBAT jumper for EXT. Shield is an optional connection when using a shielded CAN cable. Connecting the optional CAN shield may improve signal integrity in a noisy environment.