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Appendix B Cabling Requirements for PXI-8460 Low-Speed CAN
PXI-846x and NI-CAN for Windows NT B-2 ni.com
CAN_H and CAN_L are signal lines that carry the data on the CAN
network. These signals should be connected using twisted-pair cable.
The V+ and V– pins are used to supply bus power to the CAN physical
layer if external power is required for the CAN physical layer. If internal
powerfor the CAN physical layer is used,the V– pinservesasthereference
ground for CAN_H and CAN_L. See the next section, Power Supply
Information for the Low-Speed CAN Ports, for more information.
Power Supply Information for the Low-Speed CAN Ports
For port one of the PXI-8460, power is configured with jumper J5. For port
two of the PXI-8460, power is configured with jumper J6. These jumpers
are shown in Figure B-2.
Figure B-2. PXI-8460 Parts Locator Diagram
Connecting pins 1 and 2 of a jumper configures the CAN physical layer to
be powered externally (from the bus cablepower). In this configuration, the
power must be supplied on the V+ and V– pins on the port connector.
1 Power Supply Jumper J6
2 Power Supply Jumper J5
3 Assembly Number
4 Product Name
5 Serial Number
6 Termination Resistor Sockets
2
1
3 4
5
6