January 2012 3.2 Environmental Conditions 155
3.2 Environmental Conditions
3.2.1 Storage and operating temperatures
Limit values
Limit value for
temperature inside
the panel
Because the MC is installed in the operating panel, additional heat is gener-
ated 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.
The panel must be designed in such a way that this maximum temperature of
+50 °C is not exceeded. Please verify this through an appropriate temperature
measurement.
With the recommended temperature limits, active cooling is not required for
a typical panel.
Device Air approaching the
device in the panel / elec-
trical cabinet
Temperature range outside
the panel / electrical cabinet
MC 6110T 0°C to +50°C 0°C to +45°C (no direct expo-
sure to sunlight)
MB 6xx,
TE 6xx
0°C to +50°C 0°C to +45°C
HR 4xx 0°C to +45°C
PLB 6xxx,
PLD-H,
PLA-H
+5°C to +40°C
Compact-
Flash card
0°C to +70°C 0°C to +45°C (no direct expo-
sure to sunlight)
The temperature of the air inside the panel, which flows into the HEIDEN-
HAIN devices, must not exceed a maximum temperature of +50 °C.
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