Kvaser Leaf Light v2 - CAN Bus Termination Requirements

Kvaser Leaf Light v2 User’s Guide 14 (25)
Figure 12: J1939-13 Type II Connector
J1939-13 Pin Function
A GND
B Not connected
C CAN_HI
D CAN_LOW
E SHIELD
F-J Not connected
Table 7: J1939-13 pin configuration
4.3 CAN bus termination
Every CAN bus must be terminated with a 120 Ohm resistor at each end of the
bus. The Kvaser Leaf Light 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