Kvaser USBcan Pro 2xHS v2 User’s Guide
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4.4
CAN connectors
Kvaser USBcan Pro 2xHS v2 devices that use the 9-pin D-SUB connector (see
Figure 5 on Page 15) have the pinning described in Table 7 on Page 15.
Figure 5: The D-SUB 9 connector pin numbers
D-SUB pin number
Function
1
Not connected
2
CAN_L
3
GND
4
Not connected
5
Shield
6
Not connected
7
CAN_H
8
Not connected
9
Not connected
Table 7: Configuration of the 9-pin D-SUB
4.5
CAN bus termination
Every CAN bus must be terminated with a 120 Ohm resistor at each end of the
bus. The Kvaser USBcan Pro 2xHS v2 does not contain any CAN bus termination,
because their inclusion could cause severe disturbance in a system which is
already correctly terminated.
For laboratory or testing use, the exact value of the termination resistors is not
always critical. Sometimes a single terminator is sufficient. For production, proper
termination is essential. If you see error frames on the bus, you should check the
termination.
To save yourself a lot of trouble, always terminate the CAN
bus properly.
Kvaser AB, Mölndal, Sweden — www.kvaser.com
