Manual

DC-bus operation
Basic dimensioning
Cables
8

334
EDS94SPP101 EN 7.1
With different motor cable lengths, per axis at least 25 % of the longest cable must be
considered when calculating the total motor cable length.
Example: 1 Motor cable length l
mot
[m]
Axis Actual
value
min. 25 % of the longest cable To be considered
16
0.25*20=5
6
2 ... 4 3*10 3*10
5 20 Õ 20
Total 56 max. permissible for 5 axes: ∑<60 56
EMC class C2 will be complied with. ;
Example: 2 Motor cable length l
mot
[m]
Axis Actual
value
min. 25 % of the longest cable To be considered
1 ... 4 4 * 5 0.25 * 40 = 10 4*10
5 40 Õ 20
Total 60 max. permissible for 5 axes: ∑<60 80
EMC class C2 will not be complied with. :
Example: 3 Motor cable length l
mot
[m]
Axis Actual
value
min. 25 % of the longest cable To be considered
1 ... 3 3 * 100
Õ
0.25 * 100 = 25
3 * 100
4 50 50
5 ... 10 6*15 6*25
Total 410 max. permissible for 10 axes: ∑ < 500 500
EMC class C2 will be complied with. ;
Example: 4 Motor cable length l
mot
[m]
Axis Actual
value
min. 25 % of the longest cable To be considered
1 ... 4 4 * 100
Õ
0.25 * 100 = 25
4 * 100
5 ... 10 6*15 6*25
Total 490 max. permissible for 10 axes: ∑ < 500 550
EMC class C2 will not be complied with. :
8.5.9 Cables
Select the cable cross-sections for the currents resulting from power P
DC100%
.Please
observe the standards and regulations applicable for the particular location and
application.