Siemens SINUMERIK 808D ADVANCED Training Manual page 49

Commissioning
of Prototype
Machine using
Sample PLC
Commissioning the prototype
Now that the
commissioning is
completed a "SAVE
DATA" should be
performed.
To continue press the SK
To continue press the SK
808D ADVANCED Turning and Milling
Step 9
Electrical cabinet design
It may be preferable to always use cooler units as this allows the cabinet
to be sealed which is the best option for stopping the entry of
contaminants. Within the cabinets it may also be necessary to install fans
to ensure the air is circulated and prevent "Hot spots" from forming.
The technical specifications of the individual hardware component will
provide details of the power loss measured in Watts.
Calculations are made to see if the cabinet can dissipate the heat
naturally.
The cabinet manufacturer can supply details of the heat-loss of the
cabinet.
Natural heat dissipation occurs through the cabinet walls providing the wall
is in free air and not against a wall for example.
A general rule is that the energy dissipated is approximately 50Watts/m² of
free cabinet wall assuming a 10° temperature difference between the
cabinet and the outside air.
Page 49
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Step 10
Commissioning Guide