Cable length, Trunk line, Drop line – Yaskawa CM013 V7 DeviceNet Option User Manual
Page 52: Cable length -3
Cable Specification 5-3
Cable Length
Trunk Line
The maximum allowed trunk line length depends on the type of cable used and the network baud rate. The total cable length includes the
length of the trunk and the sum of all the drop lines.
For trunk lines of mixed thick and thin cables, the total length at the various baud rates:
o
125 kbaud:
L
thick
+ (5 x L
thin
) = 500 m
o
250 kbaud:
L
thick
+ (2.5 x L
thin
) = 250 m
o
500 kbaud:
L
thick
+ L
thin
= 100 m
Drop Line
The drop line is measured from the tap on the trunk line to the transceiver of the DeviceNet node. Note that the total cable length includes the
length of the trunk and the sum of all the drop lines.
Table 5.3 – Trunk Line Cable Length
Baud Rate
Thick Cable
Thin Cable
125 kbaud
500 m
100 m
250 kbaud
250 m
500 kbaud
100 m
Table 5.4 – Drop Line Cable Length
Baud Rate
Maximum @ Each
Maximum Total
125 kbaud
6 m
156 m
250 kbaud
78 m
500 kbaud
39 m