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