Cable Line Topology
What are the requirements to cable line topology with RS-485 and CAN interfaces?
In designing a cable line with RS-485 and CAN interfaces it is necessary to remember that each measuring line starts from interface converter and has a linear structure (no star-type connections are allowed).
Lengths of the cable line branch for connecting digital modules must be as short as possible. When connecting laboratory modules with connector tees, branch length must not exceed 0.5 m. In constructing measuring network with industry version digital modules, the smallest length of the branches is ensured, because the couplers are embedded in module bodies.
Typical measuring line topology is shown in the figure: