Siemens SIMATIC Box PC 627, Руководство по эксплуатации

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Application Planning
4.4 Ambient and environmental conditions
SIMATIC Box PC 627
Operating Instructions, Release 05/2006, A5E00362052-03
4-3
4.4
4.4
Ambient and environmental conditions
When you plan your project, you should make allowances for:
•
The climatic and mechanical environmental conditions specified in the specifications
given in your operating manual.
•
At least 100 mm space should be left free around the ventilation slots, in order that the
PC receives sufficient ventilation.
• Do not cover the vent slots of the device.
•
The device together with its AC power supply fulfils the requirements for fire protected
enclosures according to EN 60950-1. Therefore it can be installed without any additional
fire protective covering.
• The device with DC power supply does not conform to EN 60950-1 in the area of its
power supply connection; therefore the mounting must meet the requirements of a fire
enclosure.
• Always observe the mounting positions permitted for this device.
Warning
If the systems are installed in a non-permissible fitting position, the approvals pertaining
to UL 60950-1, UL 508 and EN60950-1 are no longer valid!