Siemens SIMATIC NET SCALANCE XR-300 - Protective Grounding (100 to 240 VAC; 110 to 250 VDC Device Versions)

Requirements for protective grounding
To wire a permanently connected protective grounding, use copper cables with a cross-section
of ≥2.5mm
2
if the cables are mechanically protected. If the cables are not mechanically
protected, use cables with a cross-section of 4.0mm
2
.
6.5.3 Protective grounding (100 to 240VAC / 110 to 250VDC device versions)
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 safely conducts fault
currents to ground and thus ensures the safety of the electrical system. According to DIN/VDE
0100, it protects persons, animals, and property from excessive contact voltages.
WARNING
No protective grounding for devices with 100 to 240 VAC / 110 to 250 VDC power supply
Risk of electric shock
When connecting to the power supply, observe the following:
• IEC plug: Ensure that the socket outlet used has a protective earth connection that matches
the power plug used.
• Connection terminals: Connect the terminals according to the terminal assignment
diagram. Connect the protective ground 󹪝rst.
Terminal blocks may only be connected and disconnected by a quali󹪝ed electrician.
Connect or disconnect power supply cables only in the de-energized state.
WARNING
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.
Requirements for protective grounding
To wire a permanently connected protective grounding, use copper cables with a cross-section
of ≥2.5mm
2
if the cables are mechanically protected. If the cables are not mechanically
protected, use cables with a cross-section of 4.0mm
2
.
For the 100 to 240VAC / 110 to 250VDC devices, the grounding bolt is provided to connect
the protective grounding as well as the functional grounding at the same time.
Connecting up
6.5Grounding
SCALANCE XR-300
Operating Instructions, 03/2023, C79000-G8976-C586-02 69