AppendixC CablingRequirements for PXI-8461 High-Speed CAN
PXI-846xand NI-CAN for Windows NT C-2 ni.com
The 5-pin Combicon-style pluggable screwterminal fol lowsthe pinout
required byth eDeviceNet Specification . Figure C-2 showsthe pinout for
thisconnector.
FigureC-2. Pinout for 5-Pin Combicon-Style Pluggable Screw Terminal
CAN_H and CAN_L are signallines that carry the data onthe CAN
network.These signals shou ld be connected using twisted-pair cable.
TheV+ and V–pins are used to supply bus power to the CAN physical
layeri f externalpower is required for the CAN physical layer. If internal
powerfor the CAN physical layer is used, the V–pinservesasthereference
ground forC AN_H and CAN_L. See the nexts ection, Power Supply
Information for the High-Speed CAN Ports, for more information.
Power Supply Information for the High-Speed CAN Ports
Forthe PXI-8461, a jump er controls the source of power for the CAN
physicallayer. For the one-port boards and port one of the two-port boards,
poweris configured with jumper J5. For port two of the two-port boards,
poweris configured with jumper J6. The location of these ju mpers is shown
in Figure C-3.
CAN_L
V–
CAN_H
V+
Shield
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