Can Bus Cable Length

Can bus maximum length.

Can bus cable length.

In other words the cable length is restricted by the speed of light. Though the iso11898 standard specifies a maximum bus length of 40m and maximum stub length of 0 3m at 1mbps. 40 meters 131 feet 0 3 meters 1 foot 40 meters 131 2 feet. Solution national instruments sells can cables of 1m and 2m length.

Cable length 40000 kbit s 1 m bitrate in kbit s bitrate given in kbit s as well. One output line is optional and ordinarily not use. 2 in the customer application the iso1050 output has two branch output lines. If you need longer cables for your application confirm with the ni product documentation for your device the xnet manual and or the sae j2411 or iso 11898 cia ds 102 and devicenet specifications.

As the data rate increases the maximum bus length drops rapidly. 1 x 2 x 0 50mm can bus cable violet pur. Bus length l cable stub length l node distance d 1 mbit sec. Maximum cable length at a speed of 1 mbit s a maximum cable length of about 40 meters 130 ft can be used.

The message is transmitted serially onto the bus using a non return to zero nrz format and may be received by all nodes. Cd systems provides a nice overview. In this formula a typical transceiver propagation of 25ns and a typical cable propagation of 5 ns m is used for calculation. There is one rule of thumb.

Using this results in 40m for 1mbit s or 320m for 125kbit s. You may need to create your own cable or purchase from a third party. This is because the arbitration scheme requires that the wave front of the signal can propagate to the most remote node and back again before the bit is sampled. Does this optional line need any termination though i think it s okay to leave it open.

The devices that are connected by a can network are typically sensors actuators and other control devices. The bits per second bps signalling rate determines the maximum length of a cable run for a can bus.