Cooling - Siemens SINUMERIK 840D sl Manual

Environmental conditions
Biological, chemical and mechanical influences, pollutants
Biological environmental conditions
Chemically active environmental conditions
Mechanically active environmental conditions
Classification of the mechanical
environment
Degree of contamination
EMC conducted / radiation
Note
The user must consider radio interference for the complete system. Particular attention should
be paid to cabling. Please contact your sales representative for assistance and support.
If compliance with limit value class C2 is required, please contact your local sales
representative.
1.2.2.3

Cooling

To calculate the heat dissipation, the total power loss P
in a housing must be taken into account.
Total power loss P
Convection surface area A [m
The surface areas of the front and bottom sides are not included in the convection surface
area calculation.
Note
A recommended value for the power loss of the operator control components is contained in
the "Technical data" section of the associated component (see "Power consumption").
Means of heat dissipation
Heat dissipation can take place as follows:
● Heat dissipation by natural convection
● Heat dissipation by natural convection and internal air turbulence
● Heat dissipation by open-circuit cooling
● Heat dissipation by open-circuit ventilation
Operator panel front: OP 012
Manual, 09/2016, A5E36371591B
Application areas
= P + P + P +... [W]
Vtotal V1 V2 V3
]:
2
General information and networking
1.2 Application planning
Remarks
Class 3B1 according to EN 60 721-3-3:
Mold, mold growth, slime, rodents, termite
and other animal vermin are not permissible.
Class 3C1 according to EN 60721‑3‑3
Class 3S1 according to EN 60721‑3‑3:
Conductive dust not permissible.
3M3 for components on the machine
3M1/3M2 for components in the control cab‐
inet
2
Class C3 according to EN 61800-3
of all heat-generating components
Vtotal
17