Appendix B
Cabling Requirements
©
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.
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
