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Chapter 6: DeviceNet
Length of Drop Line
Maximum Current
4.5 m (15 ft)
1 A
6 m (20 ft)
0.75 A
For the calculation of the maximum current at a specific length, use the following formula:
Where:
l
= Length of the drop line in meters (m)
i
= Maximum current in amps
This calculation applies to the sum of the currents of all the nodes on the selected drop line.
The length (l) is not the cumulative length of the drop line; it is the maximum distance from
any node on the drop line to the trunk line.
It is important to note that voltage differences between the V– and V+ conductors need to be
between 11 V and 25 V. The common-mode voltage between any two places on the V– wire
must not exceed 5 V.
1
2
5
4
3
A
1
4
3
5
2
B
Figure 6-7. Micro-Style DeviceNet Connector Pinouts (Viewed from Contact End)
11069-000 Rev. H
SmartController EX User's Guide
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