186 HEIDENHAIN Technical Manual iTNC 530 HSCI
Conditions for
integrating the MC
in the operating
panel
Because the MC is installed in the operating panel, additional heat is
generated that must be emitted to the surroundings through the panel wall.
The required temperature difference depends on the design and the size of
the panel.
The maximum permissible temperature of the air surrounding the panel is 45
°C. However, the temperature of the air inside the panel, which flows into the
HEIDENHAIN devices (e.g. the MC), is decisive for the HEIDENHAIN devices
integrated in the panel.
Ensure that the operating panel is designed in such a way that the air
approaching the MC does not exceed a max. temperature of +50 °C. Please
verify this through an appropriate temperature measurement.
With the recommended temperature limits, active cooling is not required for
a typical panel. If the maximum permissible temperature for the integrated
components is exceeded, however, HEIDENHAIN recommends using heat
exchangers. They ensure appropriate heat dissipation for the components in
the operating panel.
Humidity during
operation
Condensation can form, for example, if warm, moist air flows along cool
surfaces of the electronics. Therefore, cooling units with discontinuous
(e.g.two-position) temperature control must not be used. The resulting cyclic
changes in temperature and humidity can cause condensation on the cool
surfaces of the electronics. Furthermore, you must prevent condensate from
reaching the electronics and ensure that it can drain away without causing
damage.
In tropical areas it is recommended that the control not be switched off, so
that condensation is avoided on the circuit boards.
Storage
temperatures
For all control components: –20 °C to +60 °C.
NiMH rechargeable batteries in the HR 550FS: –20 °C to +21 °C at a charge
status of 40 %.
Humidity during storage of NiMH rechargeable batteries
NiMH rechargeable batteries in the HR 550FS: Relative humidity 5 < 60 % rF
The temperature of the air inside the panel, which flows into the HEIDENHAIN
devices, must not exceed a maximum temperature of +50 °C.
HEIDENHAIN recommends against using fans with filter units for
dissipating the heat in the operating panel. Due to filter contamination
problems they are often not capable of ensuring the required heat
dissipation.
Condensation on the electronics is not permitted!
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