
1.CONNECTING DeviceNet FUNCTIONS CONNECTION B-63404EN/03
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Branch length
The "branch length" refers to the longest value from where the trunk
is divided into a branch up to the first node connected to the branch.
The maximum branch length is 6 m.
Branches can be sub-divided into further branches.
Total branch length
The "total branch length" refers to the length obtained by totaling the
length of all branches. The total branch length is sometimes exceeds
this restriction even if all of the branches is within 6 m. Also, the total
branch length restriction also varies according to the baud rate.
Baud Rate Maximum Total Branch Length
500 K bit/sec 39m
250 K bit/sec 78m
125 K bit/sec 156m
Node
Branch length (max. 6 m)
T-branch tap
Node B
Node C
Branch length
Node A
T-branch tap A
T-branch tap B
T-branch tap A to node A: 6 m
T-branch tap A to node B: 5 m
T-branch tap A to node C: 6 m
All branches are within 6 m.
Node D
T-branch tap C
Node B
Node C
Node A
T-branch
T-branch tap B
T-branch tap A to T-branch tap B: 4 m
T-branch tap B to Node A: 2 m
T-branch tap B to Node B: 1 m
Node B to Node C: 1 m
T-branch tap C to Node D: 6 m
The total branch length is 12 m.
Terminator
Terminator