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Chapter 3 Preparations for Operation (Hardware)
3.5.2
Network power configuration method
3
36
Usage Recommendations
1. In attaching nodes to drop cables, consider the current capacity of not only the trunk cables
but also the drop cables.
2. In case of connecting nodes to drop cables in daisy-chain form, in particular, exercise care
against inadequate current capacity.
3. Choose a network power unit having a current capacity greater than the total current con-
sumption requirement of the network.
This section describes selection and location of power units for supplying the network
power to the individual nodes of the DeviceNet.
(1) Maximum current of DeviceNet cables
The rated network power of the DeviceNet is 24 VDC. The currents which can be
supplied to the network cables are as follows:
• Thick cable trunk line: 8 A maximum
0m
25m
50m 100m 150m 200m 250m 300m 350m 400m 450m 500m
Cable
length
8.00
8.00
5.42
Maximum
current (A)
8.00
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
Figure 3-9 Trunk Line (Thick Cable) Current
2.93
2.01
1.53
1.23
Maximum current for thick
太ケーブル最大電流
ケーブル長
Cable lengthcable
model 2000 DeviceNet Module Manual (DN611/DN611A)
1.03
0.89
0.78
0.69
0.63
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