BECKHOFF CP77xx - Manual (Page 11)

Installation Instructions
CP77xx 9
Connecting the Panel PC
Danger
The Panel PC must never be connected or disconnected in an area that is
subject to explosion hazard! Risk of explosion!
Warning
The mains plug of the Panel PC must be disconnected!
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!
Connecting cables
The connections are located at the rear of the Panel PC and are
documented in the
Product Description section.
When connecting cables to the Panel PC, please adhere to the following
order:
 Disconnect the Panel PC from the power supply.
 Connect all cables at the Panel PC 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.
Protective Earthing
Protective Earthing
The low resistance protective earthing connection is
established via the ground bolt, which is located at the rear of
the housing.