Beckhoff CP29 Series, Manual

Page: 34 / 45

Commissioning
CP29xx 34 Version: 3.1
4.3.2 Grounding the Control Panel
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
Establish low-resistance protective earth of the Control Panel via the voltage connection to avoid dangerous
touch voltages. There is a pin in the voltage socket for the protective earth (PE).
EMC
NOTE
Hardware damage due to electromagnetic interference
Using the Control Panel without functional earth can lead to hardware damage due to electromagnetic inter-
ference.
• Only use the device with functional earth.
Electromagnetic compatibility (EMC) of the Control Panel 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.
The Control Panel must comply with certain protection requirements. The Panel 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. Functional earth is established via the
grounding screw on the connection block at the rear of the device. Connect this to the central grounding
point of the control cabinet. Use cables with a minimum cross-section of 4 mm
2
.