Grounding of the industrial PC
Potential differences are minimized and electrical currents are diverted to the ground through grounding or potential equalization of electronic devices. This is to avoid electromagnetic interference.
EMC
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Hardware damage due to electromagnetic interference Using the industrial PC without functional earthing can lead to hardware damage due to electromagnetic interference.
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Electromagnetic compatibility (EMC) refers to the industrial PC's ability not to interfere with other devices and equipment through electromagnetic interference, and not to be disturbed by electrical or electromagnetic effects.
For this purpose, the industrial PC must comply with certain protection requirements. The industrial PC 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. You establish functional earthing via the grounding connection between the grounding bolt at the bottom of the device (see Fig. 19) and the central grounding point of the control cabinet in which the PC is installed.
Use wires with a cross-section of at least 4 mm2 or a flat conductor for the ground connection, as the circumference of the conductor should be as large as possible.
