Application Planning
3.4 Ambient and environmental conditions
SIMATIC Box PC 827B
Getting Started, 07/2008, A5E01127540-02
17
3.4
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 instructions.
●
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 fulfill the requirements according to
EN 60950-1 in the power supply unit area. The device must therefore be installed in such
a ways is part of an operating area with restricted access (e.g. a locked switchgear
cabinet, control panel or server room).
●
Always observe the mounting positions permitted for this device.
●
The connected or built-in peripherals should not introduce a counter emf in excess of
0.5 V into the device.
WARNING
Failure to adhere to these conditions when mounting the system voids the approvals
based on UL 60950-1, UL 508 and EN 60950-1!
