STÖBER
4 | Network structure
09/2019 | ID 442637.01
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4
Network structure
In the standard version, CAN operates with a linear topology in which all nodes (master and slaves) are interconnected by 3
shielded lines: CAN-High and CAN-Low. A line is also provided for the reference ground between the nodes.
To prevent data overlapping through signal reflections at the two bus ends and thus reduce susceptibility to faults
substantially, terminal resistances of 120 Ω are connected between CAN-H and CAN-L.
The following graphic abstracts a CANopen network consisting of a controller as well as multiple SD6 drive controllers as
bus nodes.
CANopen
3 x
Controller
Command level
Controller level
Commissioning
Field level
Commissioning
SD6
drive controllers
Fig. 1: CANopen – network structure, using the SD6 series as an example
