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①
②
1. Loosen the grounding screw).
2. Put the grounding terminal and grounding screw together.
3. Tighten the grounding screw with a maximum torque of 0.75 Nm.
Protective/functional ground
The connection of the reference potential surface with the protective ground system is normally
in the cabinet close to the power feed-in. This ground conducts fault currents to ground safely
and according DIN/VDE 0100 is a protective ground to protect people, animals and property from
too high contact voltages.
Apart from the protective ground, there is functional grounding in the cabinet. According
to EN60204-1 (DIN/VDE 0113 T1) electrical circuits must be grounded. The chassis (0 V) is
grounded at one defined point. Here, once again the grounding is implemented with the
lowest leakage resistance to ground in the vicinity of the power feed-in.
With automation components, functional ground also ensures interference-free operation of
a controller. Via the functional ground, interference currents coupled in via the connecting
cables are discharged to ground.
6.5
Industrial Ethernet
6.5.1
Electrical
Note
Strain relief for the Ethernet cables
In order to avoid mechanical stress on the Ethernet cables and resulting interruption of the
contact, fasten the cables at a short distance from the connector using a cable guide or busbar.
SCALANCE XC-400
Operating Instructions, 08/2023, C79000-G8976-C694-01
1
Grounding terminal with cable
Fillister head screw with spring washer and washer
2
Connecting up
6.5 Industrial Ethernet
61
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