40
model 2000 DeviceNet Module Manual (DN611/DN611A)
Chapter 3 Preparations for Operation (Hardware)
3
Figure 3-13 Example of Overloaded Single Power Unit Central Connection
(a) Total current consumption of section 1 = 1.1A+1.25A+0.5A=2.85A
(a’) Total current consumption of section 2 = 0.25A+0.25A+0.85A=1.35A
(b) Overall power cable length of section 1 = Overall power cable length of section 2
= 120 m
(c) Maximum current that can be supplied to the cables based on Figure 3-10 =
About 2.56 A (Obtained by linear approximation of 100 to 150 m)
(d) Since the total current consumption of section 1 is greater than the maximum
current, the power line is overloaded.
Solution: Move the power tap to the overloaded section. See Figure 3-14.
Node 6Node 5Node 4Node 1Node 2Node 3
ネットワーク
電源供給装置
電源
タップ
セクション 1
120 m
V
+−
1.1A 1.25A 0.5A V
−
0.25A 0.25A 0.85A
セクション
2
120 m
Section 1 Section 2
Power
tap
Network power
unit
To Next Page
Loading...
