National Instruments 321372C-01 用户手册
Appendix B
Cabling Requirements
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National Instruments Corporation
B-3
Getting Started with CAN for Windows NT
Power Supply Information for the CAN Ports
For the PCI-CAN and PCI-CAN/2, the power source for the CAN physical
layer is configured with a jumper. For the PCI-CAN and port one of the
PCI-CAN/2, power is configured with jumper J6. For port two of the
PCI-CAN/2, power is configured with jumper J5. The location of these
jumpers is shown in Figure B-4.
layer is configured with a jumper. For the PCI-CAN and port one of the
PCI-CAN/2, power is configured with jumper J6. For port two of the
PCI-CAN/2, power is configured with jumper J5. The location of these
jumpers is shown in Figure B-4.
Figure B-4. PCI-CAN/2 Power Source Jumpers
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.
Connecting pins 2 and 3 of a jumper configures the CAN physical layer to
be powered internally (from the card). In this configuration, the V– signal
serves as the reference ground for the isolated signals.
be powered internally (from the card). In this configuration, the V– signal
serves as the reference ground for the isolated signals.
1
Power Supply Jumper J6
2
Product Name
3
Serial Number
4
Assembly Number
5
Power Supply Jumper J5
3
5
4
1
2