Table 5-3 Mounting Holes For Rails - Siemens Simatic S7-300 CPU 31xC Series Installation And Operating Instructions Manual

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