Siemens Simatic CFU Commissioning Manual page 31

Required accessories
You can use the following screw types for fastening of the mounting rails:
Table 6-1
For ...
outer fixing screws
Additional fixing
screws (for mounting
rails > 483 mm)
Additional fixing screws (for mounting rails > 530 mm)
In the case of mounting rails > 530 mm, we recommend using fixing screws at distances of
≤ 500 mm.
Preparing mounting rails for installation (for mounting rails > 530 mm)
To prepare the 2000 mm mounting rail for the CFU, follow these steps:
1. Cut the 2000 mm mounting rail to the required length.
2. Mark the holes. The necessary dimensions can be found in the table "Dimensions for the
drill holes":
– Two holes at the beginning and end of the mounting rail (distance 15 mm).
– Additional drill holes at equal intervals of 500 mm maximum
3. Drill the marked holes according to the selected type of fastening.
4. Ensure that there are no burrs or shavings on the mounting rail.
Note
For the CFU to be mounted correctly, you must observe the following:
● Ensure that the drill holes are positioned centered on the mounting rail (17.5 mm -
corresponds to the center of a mounting rail: partially with an identification groove),
● and that only screws up to the maximum size are used.
SIMATIC CFU
Commissioning Manual, 07/2018, A5E39252870-AC
Required accessories
you can use ...
Cylinder head screw M6
to ISO 1207/ISO 1580 (DIN 84/
DIN 85)
Hexagon bolt M6
to ISO 4017 (DIN 4017)
6.2 Installing the mounting rail
Explanation
Choose a suitable screw length for your
assembly.
You also need washers for cylinder head
screws with an internal diameter of
6.4 mm and an external diameter of
11 mm in accordance with ISO 7092
(DIN 433).
Installation
31