Kvaser U100P User’s Guide
10 (22)
Figure 6: The 9-pin D-SUB connector pinout.
D-SUB pin
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 2: Configuration of the 9-pin D-SUB connector.
3.5
CAN bus termination
Every CAN bus must be terminated with a 120 Ohm resistor at each end of the
bus. The Kvaser U100P 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.
3.6
Power supply
The Kvaser U100P is powered through the USB connector.
Kvaser AB, Mölndal, Sweden — www.kvaser.com
