Operating instructions

Application planning
4.4 Mounting positions and fastening
SIMATIC Panel PC 677B
Operating Instructions, 05/2007, A5E01035609-01
27
Note
The computer unit with AC power supply satisfies fire protection requirements to EN
60950-1. It may therefore be installed without additional fire-proofing measures.
● Provide adequate volume in the switchgear cabinet for air circulation and heat transport.
Keep at least 10 cm distance between the device and switchgear cabinet.
● Ensure that the maximum air intake temperature, measured 10 cm before the air intake
opening on the fan, does not exceed 45°C. The maximum air intake temperature must be
accounted for especially when sizing closed switchgear cabinets.
● The minimum distance between the device and the housing is 10 cm on the air output
side at the fan.
● Position the device in such a way that the air vents of the housing are not covered up
following mounting.
● Ensure there is enough free space in the switchgear cabinet to allow the sheet metal
cover to be removed. You will otherwise have to remove the device from the switchgear
cabinet or swivel arm when replacing memory or the battery.
● Equip the switchgear cabinet with struts for stabilizing the mounting cut-out. Install struts
where necessary.
● Avoid extreme environmental operating conditions. Protect your device against dust,
moisture and heat.
● Install the device in such a way that it poses no danger, e.g. by falling over (see Chapter
"Specifications").
● During assembly, please comply with the approved installation positions.
Notice
If you mount the device in an impermissible installation position or you do not observe
the environmental conditions (see Chapter "Specifications"), you endanger the product
safety provided by the UL-approval and compliance with the low-voltage directive (via
EN 60950-1). In additional, the functionality of the device is no longer guaranteed.
For additional information, refer to the dimension diagrams in the appendix.