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 prevent dangerous touch voltages and electromagnetic interference.

The protection provided by the devices may be impaired by non-intended use.

All connected devices must be in SELV (Safety Extra Low Voltage)/PELV (Protective Extra Low Voltage) circuits.

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.

A protective conductor is included in the industrial PC's IEC socket for connecting the power supply. Establish the low-resistance protective earth of the industrial PC via the voltage connection, thus avoiding dangerous touch voltages.

If you have ordered the industrial PC with a 24 V power supply, a pin for protective earthing (PE) of the device is included in the power supply socket. Establish the low-resistance protective earth of the industrial PC via the voltage connection, thus avoiding dangerous touch voltages.

EMC

Notice

Hardware damage due to electromagnetic interference

The use of the device without a functional earth can lead to material damage due to electromagnetic interference.

Only use the device with functional earth.

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 earthing is established via the ground connection between the threaded hole above the connection section and the central grounding point of the rack in which the PC is installed.

If you have ordered the industrial PC with a 24 V power supply, you can choose between two grounding points for functional earthing. Use either the threaded hole above the connection section or the grounding bolt in the sheet metal on the power supply. Again, make the ground connection to the central grounding point of the rack.

Use cables with the largest possible cross-section, at least 4 mm², or a flat conductor for the ground connection, as the conductor's circumference should be as large as possible.