CAN High Speed Bus Power Requirements

The High-Speed physical layer on PXI, PCI, USB, and Transceiver Cable NI-XNET interfaces is internally powered. As such, there is no need to supply bus power. The COM pin serves as the reference ground for the bus signals.

The High-Speed physical layer on C Series NI 9862 requires external power supply of +9 V to +30 V to operate. Connect the external power supply to the Vsup pin on the module. The COM pins are for reference ground.