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Installing The Simatic Box Pc - Siemens SIMATIC Box PC 840 Manual

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3.2

Installing the SIMATIC Box PC 840

The SIMATIC Box PC 840 can be operated in all the usual fitting positions. It is
particularly suitable for fitting in consoles, switch boards and control panels.
The SIMATIC Box PC 840 with AC power supply meets the requirements for a
fire enclosure to EN60950. it can therefore be fitted without an additional fire
enclosure.
The SIMATIC Box PC 840 with DC power supply is an open device (left device
side); therefore the mounting must meet the requirements of a fire enclosure.
Warnung
!
Only connect the device to 24V DC power supply systems which meet the
requirements of a safe extra-low voltage (SELV); in addition, a protective
conductor must be connected.
The cable cross section has to be large enough that the Box PC will not be
damaged by the cables when there is a short circuit.
Please note the following points when installing the PC:
S Avoid extreme ambient conditions as far as possible. Protect your PC from
dust, moisture, and heat.
S Keep the PC out of direct sunlight.
S Mount the PC as safely as possible to prevent any danger (for example, by
falling over).
S The clearance around the housing must be at least 100 mm, so that the PC is
sufficiently ventilated.
S Make certain that the ventilation slots for the housing are not covered.
S Observe the permissible fitting positions without fail when installing the
systems.
Warning
!
If the systems are installed in a non-permissible fitting position, the approvals
pursuant to UL 1950, UL 508 and EN60950 are no longer valid!
SIMATIC Box PC 840 Manual
A5E00085984-04
Setting Up and Operating the SIMATIC Box PC 840
3-3

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