Toshiba V Series Manual page 56

Chapter 3 Preparations for Operation (Hardware)
3
36
Section 1
セクション 1
100 m
Node 3 Node 2
1.1A 1.25A
Figure 3-14 Example of Solution to an Overload
(a) Total current consumption of section 1
(a') Total current consumption of section 2
(b) Overall power cable length of section 1
(b') Overall power cable length of section 2
(c) Maximum current that can be supplied to the cables in section 1 based on Figure
3-10 = 2.93 A
(c') Maximum current that can be supplied to the cables in section 2 based on Figure
3-10 = About 2.19 A (Obtained by linear approximation of 100 to 150 m)
(d) Since the total current consumption of both sections 1 and 2 is smaller than the
maximum current, power can be supplied to all the nodes by single power unit
central connection.
(e) Install a network power unit with a rated current capacity of 4.2 A or more.
(Select one with an adequate capacity, considering the conditions of use.)
V +−
電源
Power
Node 1
タップ
tap
V −
0.5A
ネットワーク
Network power
電源供給装置 unit
model 3000 DeviceNet Module Manual (DN311/DN311A)
Section 2
セクション 2
140 m
Node 4 Node 5 Node 6
0.25A 0.25A 0.85A