Kvaser Ethercan Light User’s Guide
17 (22)
Figure 12: The D-SUB 9 connector pin numbers
D-SUB pin number
Function
1
Not connected
2
CAN_L
3
GND
4
Factory Reset
5
Shield
6
Not connected
7
CAN_H
8
Not connected
9
Power supply to the device
Table 7: Configuration of the 9-pin D-SUB
The Factory Reset input is only used to reset the device to factory settings, see
Section 4.3, Reset device to factory settings, on Page 14.
5.3
CAN bus termination
Every CAN bus must be terminated with a 120 Ohm resistor at each end of the
bus. The Kvaser Ethercan Light 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