BECKHOFF CP790x-140x - Manual (Page 22)

Mounting
4.2 Connecting the Control Panel
Risk of explosion!
Danger
The Control Panel must never be connected or disconnected in an area that is subject to
explosion hazard!
The mains plug must be disconnected
Attention
Please read the documentation for the external devices prior to connecting them!
During thunderstorms, plug connector must neither be inserted nor removed!
When disconnecting a plug connector, always handle it at the plug. Do not pull the cable!
4.2.1 Connecting cables
The connections are located at the rear of the Control Panel and are documented in the chapter
Connections .
When connecting cables to the Control Panel, please adhere to the following order:
• Disconnect the Control Panel from the power supply.
• Connect all cables at the Control Panel and at the devices to be connected.
• Ensure that all screw connections between connectors and sockets are tight!
• Reconnect all devices to the power supply.
4.2.2 Protective Earthing
The low resistance protective earthing connection of the Control Panel is established via the ground bolt,
which is located in the connection area.
20 CP790x-140x