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4.3
Connecting the Panel PC
Risk of electric shock
Dangerous touch voltages can lead to electric shock. To avoid electric shock, adhere to the following
points:
• Never connect or disconnect the device cables during a thunderstorm.
• Provide protective earthing for handling the device.
To make the Panel PC ready for operation, you have to connect it. The first step is to ground the device.
Then you can connect the cables and the power supply.
An external power supply unit is required to supply 24 V DC (-15 %/+20 %) for operating the device.
The cabling of the Panel PC in the control cabinet must be done in accordance with the standard EN
60204-1:2006 PELV = Protective Extra Low Voltage:
• The PE conductor (protective earth) and the "0 V" conductor of the voltage source must be on the
same potential (connected in the control cabinet).
• Standard EN 60204-1:2006, section 6.4.1:b stipulates that one side of the circuit, or a point of the
energy source for this circuit must be connected to the protective conductor system.
Devices connected to the Panel PC with their own power supply must have the same potential for the PE
and "0 V" conductors as the Control Panel (no potential difference).
4.3.1
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.
The grounding bolt is located in the connection compartment of the Panel PC and is used to ensure the
functional earthing of the PC (see Fig. 29). Use cables with a minimum cross-section of 4 mm
connection.
Fig. 29: CP37xx-1600_grounding bolt for functional earthing
For information on how to access the connection compartment, refer to chapter 3.2 Interface description
[} 11].
Another grounding bolt is located inside the mounting arm adapter (see Fig. 30). You must establish a low-
resistance connection via this bolt.
CP37xx-1600
CAUTION
Version: 1.1
Commissioning
2
for the ground
33
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