5 Installation Procedure
14
YASKAWA ELECTRIC
SIEP C730600 43A YASKAWA AC Drive-Option Card DeviceNet Technical Manual
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.
Table 6 Trunk Line Cable Length
To calculate the maximum total length for trunk lines of mixed thick and thin cables, use the following formulas:
• 125 k bit/s: L
thick
+ (5 x L
thin
)
≤
500 m
• 250 k bit/s: L
thick
+ (2.5 x L
thin
)
≤
250 m
• 500 k bit/s: 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 7 Drop Line Cable Length
EDS Files
For easy network implementation of drives equipped with a SI-N3, an EDS file can be obtained from:
Europe: http://www.yaskawa.eu.com
Japan: http://www.e-mechatronics.com
Other areas: contact a Yaskawa representative.
Baud Rate (k bit/s)
Thick Cable (m)
Thin Cable (m)
125
500
100
250
250
100
500
100
100
Baud Rate (k bit/s)
Maximum at Each Drop (m)
Maximum Total (m)
125
6
156
250
78
500
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