Connecting The Control Panel - Beckhoff CP39 Series Manual

Commissioning
4.3

Connecting the control panel

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 prepare the control panel 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.
Connect the control panel in the control cabinet according to standard EN 60204-1:2006 Protective Extra
Low Voltage (PELV):
• 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 control panel with their own power supply must have the same potential for the PE
and "0 V" conductors as the control panel (no potential difference).
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CAUTION
Version: 3.6 CP39xx