Toshiba V Series - Network Power Configuration Method

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model 3000 DeviceNet Module Manual (DN311/DN311A)
Chapter 3 Preparations for Operation (Hardware)
3
3.5.2 Network power configuration method
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
Figure 3-9 Trunk Line (Thick Cable) Current
Usage Recommendations
• In attaching nodes to drop cables, consider the current capacity of not only the trunk cables
but also the drop cables.
• In case of connecting nodes to drop cables in daisy-chain form, in particular, exercise care
against inadequate current capacity.
• Choose a network power unit having a current capacity greater than the total current con-
sumption requirement of the network.
Cable
length
0m 25m 50m 100m 150m 200m 250m 300m 350m 400m 450m 500m
Maximum
current (A)
8.00 8.00 5.42 2.93 2.01 1.53 1.23 1.03 0.89 0.78 0.69 0.63
太ケーブル最大電流
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
0m
50m
100m 150m 200m 250m 300m 350m 400m 450m 500m
ケーブル長
電流値
(A)
Maximum current for thick
Current (A)
Cable lengthcable