Application Planning 
  4.5 Permitted mounting positions 
SIMATIC Box PC 627 
Operating Instructions, Release 05/2006, A5E00362052-03 
4-5 
Additional permissible PC mounting positions according to UL508/CSA 22.2 No. 142 
An inclination of ±15° is allowed in this mounting position. An external fire protection casing 
is required. 
 
 
 
Position 5 (ports facing down) 
CD/DVD drive cannot be operated. 
 
 
Position 6 (ports facing above) 
CD/DVD drive cannot be operated. 
 
 
 
Note 
CD/DVD and flopply drives cannot be operated in this position. The CD drawer opens 
upward or downward which can lead to mechanical damages in the drawer mechanism.