A CAN Bus network must have a terminating resistor between CAN High and CAN Low for it to work correctly. … The resistance should ideally be less than 120 Ohms and closer to 60 Ohms if a resistor is fitted at each end of the bus.

Why termination resistor is used in CAN?

Terminal resistors are needed in CAN bus systems because CAN communication flows are two-way. The termination at each end absorbs the CAN signal energy, ensuring that this is not reflected from the cable ends. Such reflections would cause interference and potentially damaged signals.

CAN bus termination 120 ohm?

It is well known, in the CAN community at least, that every CAN and CAN FD network should be terminated with a 120 Ohm resistor at each end of the bus. … If your termination is correct, you should read approximately 60 Ohms (two 120 Ohm resistors in parallel produce a resistance of 60 Ohms).