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 jumperJ 6. For port two of the
PCI-CAN/2, power is configured with jumperJ5. 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.
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.
1 Power Supply Jumper J6
2 Product Name
3 Serial Number
4 Assembly Number
5 Power Supply Jumper J5
3
5 4
1 2