National Instruments PXI-8462 用户手册
Appendix B
Cabling Requirements for PXI-8460 Low-Speed CAN
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.
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
power for the CAN physical layer is used, the V– pin serves as the reference
ground for CAN_H and CAN_L. See the next section, Power Supply
Information for the Low-Speed CAN Ports, for more information.
layer if external power is required for the CAN physical layer. If internal
power for the CAN physical layer is used, the V– pin serves as the reference
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.
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 cable power). In this configuration, the
power must be supplied on the V+ and V– pins on the port connector.
be powered externally (from the bus cable power). 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