Grounding the Panel PC
Potential differences are minimized and electrical currents are diverted to the ground through grounding or potential equalization of electronic devices. This is to prevent dangerous touch voltages and electromagnetic interference.
Protective earth
The protective grounding of a device serves to avoid dangerous touch voltages. According to the EN 60204-1 standard (Chapter 8 Potential equalization), protective grounding is required if:
- the device exceeds dimensions of 50 mm x 50 mm,
- the device can be touched or encompassed over a large area,
- contact between the device and active parts is possible,
- an insulation fault may occur.
Establish low-resistance protective earthing of the panel PC via the voltage connection to avoid dangerous touch voltages. There is a pin in the voltage socket for the protective earth (PE).
EMC
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Hardware damage due to electromagnetic interference The use of the device without a functional earth can lead to material damage due to electromagnetic interference.
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Electromagnetic compatibility (EMC) of the device includes on the one hand not affecting other devices and equipment by electromagnetic interference and on the other hand not being disturbed by electrical or electromagnetic effects itself.
To do this, the device must comply with certain protection requirements. The device has EMC interference immunity according to EN 61000-6-2. The EMC interference emission of the device meets the requirements of EN 61000-6-4.
The functional earth is necessary for the EMC of the device. The functional earth is established via the connection of the grounding bolt in the connection section of the panel PC (see Fig. 15). Use cables with a minimum cross-section of 4 mm2 for the ground connection.
Fig.15: Grounding bolt for functional earthingFor information on how to access the connection compartment, refer to chapter 3.2 Interface description.