Protective Grounding (Poe Variants) - Siemens SIMATIC NET SCALANCE XR-300WG Operating Instructions Manual

6.9

Protective grounding (PoE variants)

Grounding options
For PoE variants, grounding (protective grounding) takes place using the grounding bolts on the
rear of the device.
Figure 6-8
Protective grounding
The connection of the reference potential surface with the protective conductor system is
normally in the control cabinet close to the power feed-in. This grounding conducts fault
currents to ground safely and according to DIN/VDE 0100 is protective grounding to protect
people, animals and property from too high contact voltages.
Connect protective grounding via a grounding bolt
Connect the second protective conductor
Due to the possible leakage currents, it is imperative that you connect a second protective
conductor permanently to the device. The work must be performed by a specialist according to
IEC 62368-1.
To wire a permanently connected protective grounding, use copper cables with a cross-section
of ≥ 2.5 mm
protected, use cables with a cross-section of 4.0 mm
①
②
③
④
SCALANCE XR-300WG
Operating Instructions, 03/2021, C79000-G8976-C454-07
Position of the grounding bolt on the back of the device for PoE variants
WARNING
, if the cables are mechanically protected. If the cables are not mechanically
2
1
2
Grounding terminal with cable
Washer
Spring washer
Nut
.
2
3
4
6.9 Protective grounding (PoE variants)
Connecting up
67