BECKHOFF C6920 - Manual (Page 14)

Installation Instructions
Installation of the PC in the control cabinet
The C6920/ 25 Industrial PCs are designed for mounting in control
cabinets for machine and plant engineering applications.
The ambient conditions specified for operation must be observed (see
chapter
Technical data ).
Preparation of the control
cabinet
Four holes for the fixing bolts have to be provided in the control cabinet
according to the dimensions of the PC (see chapter
Assembly dimensions ).
Circulation of air
Note
When the unit is installed in an enclosure, adequate space for ventilation
and for opening the PC must be provided.
The clearance above and below the housing must be at least 5 cm in
order to ensure adequate ventilation of the PC.
Avoid extreme environmental conditions
Attention
Extreme environmental conditions should be avoided as far as possible.
Protect the PC from dust, moisture and heat.
The ventilation slots of the PC must not be covered.
Earthing measures
Earthing measures
Earthing connections dissipate interference from external power supply
cables, signal cables or cables to peripheral equipment.
Establish a low-impedance connection from the earthing point on the PC
housing to the central earthing point on the control cabinet wall, in which
the computer is being installed. The earthing connection is located at the
front side of the housing (see photograph on the left).
12 C6920/ 25