Siemens Simatic S7-300 CPU 31xC Series Installation And Operating Instructions Manual page 92

Installing
5.2 Installing the mounting rail
Preparing the 2 m mounting rail for installation
1. Cut the 2 m mounting rail to the required length.
2. Mark out:
3. If the length of your rail exceeds 830 mm, you must stabilize it by providing additional
4. Drill the marked holes, bore diameter = 6.5
5. Mount an M6 bolt for fixing the ground conductor.
2
1
Key to numbers in the figure
(1)
(2)
(3)
(4)
(5)
5-4
– four bores for the fixing screws (for dimensions, refer to "Dimensions for fixing holes")
– one hole for the protective conductor bolt.
holes for fixing it with more screws.
Mark out these holes along the groove in the middle section of the rail (see the Figure
below). The pitch should be approx. 500 mm.
Hole for the ground conductor bolt
Groove for drilling additional holes for mounting screws
Hole for the mounting screw
Additional hole for mounting screw
Hole for the mounting screw
mm for M6 screws.
+0,2
3
4
5
Operating Instructions, Edition 08/2004, A5E00105492-05
S7-300, CPU 31xC and CPU 31x: Installation