Network Configuration Method - Toshiba nv Series Instruction Manual

Network configuration method

3.5.2
Important
- When attaching a node to a drop line, consider not only the current capacity of the trunk line but also the current
capacity of the drop line.
- Especially when connecting nodes in daisy chain on drop lines, be careful the insufficiency of current capacity.
- Use a network power supply with a current capacity that is sufficiently larger than the total current consumption
required for the network.
This section describes the selection of power supply devices and the arrangement of power supply devices
and power supply devices selection for supplying network power to each DeviceNet node.
(1) Maximum current of DeviceNet cable
The DeviceNet network power supply is rated 24VDC.
The current that can be passed through the network cable is as follows.
Trunk line using thick cable: Maximum 8A
Cable length [m]
Max. current [A] 8.00
8.00
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
0 50
0 25 50 100
8.00 5.42 2.93
Maximum current of thick cable
100 150 200
Cable length [m]
Figure 3-11 Trunk current (when thick cable is used)
Unified Controller nv Series DeviceNet Module DN912 Instruction Manual
150 200 250 300
2.01 1.53 1.23 1.03
250 300 350
3.5 Network power and ground
350 400 450 500
0.89 0.78 0.69 0.63
400 450 500
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