HEIDENHAIN TNC 335 Technical Manual - Manual (Page 39)

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TNC 360 2 Assembly Hints 3-9
Obstructive
elements
Heat generating
elements
Incorrect
LE
LE
Correct
2.3 Humidity
Permissible humidity: < 75 % in continuous operation,
< 95 % for not more than 30 days p.a. (randomly distributed).
In tropical areas it is recommended that the TNC is not switched off, so that condensation is avoided
on the circuit boards. The heat generation prevents condensation and has no further disadvantages.
2.4 Mechanical vibration
Permissible vibration: < 0.5 g
2.5 Mounting position
Note the following fundamental points on mounting:
– Mechanical accessibility
– Permissible environmental conditions
– Electrical noise immunity
– The electrical regulations in effect in your country