8.1.2
Voltage drop
The cables between the modules and the modules themselves cause a voltage drop, which must be
taken into account in the project engineering.
Determination of the voltage drop based on the cable length and current
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Tab. 7 Determining the voltage drop.
Information for the exact calculation of the voltage drop
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8.1.2.1 Calculating the voltage drop.
Cable length [m]
1)
0.3
0.5
1.0
2.0
5.0
7.5
10.0
15.0
Voltage drop at 1 A [V]
0.0
0.1
0.1
0.2
0.4
0.5
0.7
1.1
Voltage drop at 2 A [V]
0.1
0.1
0.2
0.3
0.7
1.1
1.4
2.1
Voltage drop at 3 A [V]
0.1
0.2
0.3
0.5
1.1
1.6
2.2
3.2
Voltage drop at 4 A [V]
0.2
0.2
0.4
0.6
1.5
2.2
2.9
4.3
1) The specified values are valid for permissible cables with a core cross-section of 0.5 mm² from the Festo catalogue.
Tab. 7 Determining the voltage drop
Installation
17
Festo — CPX-AP — 2019-06
