Installing
5.2 Installing the mounting rail
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
5-5
Dimension of the mounting holes
The fixing hole dimensions for the mounting rail are shown in the table below..
Table 5-3 Mounting holes for rails
"Standard" rail 2 m mounting rail
32.5 mm
57.2 mm
a
b
32.5 mm
57.2 mm
15 mm
approx.
500 mm
approx.
500 mm
15 mm
_
_
_
Length of rail Dimension a Dimension b
160 mm 10 mm 140 mm
482.6 mm 8.3 mm 466 mm
530 mm 15 mm 500 mm
830 mm 15 mm 800 mm
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Fixing screws
To fix the mounting rails you can use the following types of screws:
For ... you can use ... description
cylindrical head screw M6 to
ISO 1207/ISO 1580
(DIN 84/DIN 85)
outer fixing screws
M6 hexagonal head screw to
ISO 4017 (DIN 4017)
additional fixing screws
(only 2 m mounting rail)
cylindrical head screw M6 to
ISO 1207/ISO 1580
(DIN 84/DIN 85)
Choose a suitable screw length
for your assembly.
You also need size 6.4 washers
to ISO 7092 (DIN 433)
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