Siemens SCALANCE X308-2M Operating Instructions Manual page 110

Installation
5.2 Installing a switch
Minimum clearances
If you install the IE Switch in rack devices without forced ventilation or cooling, minimum
clearances must be maintained to neighboring devices or the wall of the enclosure. By
keeping to the minimum clearances, there is then an adequate stream of air for heat
dissipation during operation. Keep to the following minimum clearances to neighboring
devices.
Table 5- 2
Minimum clearance to devices below the switch
Minimum clearance to devices above the switch
CAUTION
Four-point mounting
If mechanical load is high, the device should be secured at four points. You will find more
detailed information in the section "Mechanical stability in operation".
110
Minimum clearances for installation in rack devices
100 mm
100 mm
Operating Instructions, 02/2012, A5E01113043-12
SCALANCE X-300