Cable lengths, stub and drop lines

Recommended maximum line lengths for the main line and stub 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.

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Traning CAN basics

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.

Schu­lun­gen

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By observing the most important basics, you can get even complex bus setups into safe operation with sufficient fault reserve.

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Why measure physically?

What gain in knowledge can you expect when you measure your CAN bus on the physical level?