Trunk Line And Drop Line Length - YASKAWA 1000 Series Technical Manual

13 Trunk Line and Drop Line Length

13 Trunk Line and Drop Line Length
Refer to www.odva.org for more information regarding wiring DeviceNet networks.
Trunk Line
The maximum allowable 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.
Baud Rate (kbps)
125
250
500
To calculate the maximum total length for trunk lines of mixed thick and thin cables, use the following formulas:
• 125 kbps: L + (5 x L
thick
• 250 kbps: L + (2.5 x L
thick
• 500 kbps: L + L
thick thin
Drop Line
The drop line is measured from the tap on the trunk line to the transceiver of the DeviceNet node. The total cable length
includes the length of the trunk and the sum of all the drop lines.
Baud Rate (kbps)
125
250
500
78
Table 23 Trunk Line Cable Length
) ≤ 500 m (1640 ft.)
thin
) ≤ 250 m (787 ft.)
thin
≤ 100 m (328 ft.)
Table 24 Drop Line Cable Length
Thick Cable
500 m (1640 ft.)
250 m (787 ft.)
100 m (328 ft.)
Maximum at Each Drop
6 m (20 ft.)
YASKAWA ELECTRIC SIEP C730600 43B 1000-Series Option SI-N3 Technical Manual
Thin Cable
100 m (328 ft.)
100 m (328 ft.)
100 m (328 ft.)
Maximum Total
156 m (511 ft.)
78 m (256 ft.)
39 m (128 ft.)