CAN Bus 120 Ohm Termination Resistor
Comes with flying leads 22 AWG 100mm long.
Your CAN Bus should be wired much like a single length of train track with "stations" or CAN devices along the track in a daisy chained fashion. At each end of the track there needs to be a 120 Ohm "terminating" resistor. This terminating resistor stops signals being reflected back down the CAN Bus at the end of the line. The reflected signals interfere with and degrade the real signal.
Whilst your CAN Bus system might still seemingly work ok without the resistors, there could be lots of corrupted and repeated messages that you don't even know about. Not having the proper CAN Bus layout with correct value termination resistors definitely becomes an issue with higher bus speeds, long lengths, a high number of devices and an electrically noisy environment.
Many CAN devices have a 120 Ohm termination resistor built in. Sometime these can be be switched in either with a physical switch (or jumper), or software selectable.
