Cable lengths, stub and drop lines
|baud rate||max. trunk line length||max. drop line lenght||max. lenght of all drop lines||max. drop line lenght at multiport tap||max. lenght of trunklines with multiport tap (without droplines)|
|50 kbit/s||1000 m||50 m||250 m||-||-|
|125 kbit/s||500 m||20 m||100 m||4,8 m||310 m|
|250 kbit/s||250 m||10 m||50 m||2,4 m||120 m|
|500 kbit/s||100 m||5 m||25 m||1,2 m||66 m|
|1 Mbit/s||20 m||1 m||5 m||0,3 m||13 m|
The same length restrictions apply in the CAN FD network. The information in the table here refers to the arbitration baud rate.
More content on that topic
It is important for the smooth interaction of the components – especially when the maximum bus lengths are reached – to use exactly the same bit timing in all nodes.
GEMAC offers training courses on CAN basics in one-day seminars. These take place at intervals at our premises, or at your premises on request.
At the moment they are held in German only.
By observing the most important basics, you can get even complex bus setups into safe operation with sufficient fault reserve.
What gain in knowledge can you expect when you measure your CAN bus on the physical level?