length recommendations in the ISO 11898, CiA DS 102, and
DeviceNet specifications.
ISO 11898 specifies 40 m total cable length with a maximum
stub length of 0.3 m for a bit rate of 1 Mb/s. The ISO 11898
specification says that significantly longer cable lengths may be
allowed at lower bit rates, but you should analyze each node for
signal integrity problems.
Number of CAN Nodes
The maximum number of nodes depends on the electrical
characteristics of the nodes on the network. If all nodes meet the
ISO 11898 requirements, you can connect at least 30 nodes to the
bus. You can connect higher numbers of nodes if the nodes’
electrical characteristics do not degrade signal quality below ISO
11898 signal level specifications.
The NI 9862 electrical characteristics allow at least 110 CAN
ports on a network.
NI 9862 Getting Started Guide
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© National Instruments
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