Siemens Simatic CFU, Commissioning Manual, Page: 185 / 220

A.4 Mounting rules
A.4.1 Minimum clearances in the control cabinet
Install the mounting rail so that sufficient space remains for the installation and heat removal of
the Compact Field Unit remains.
Observe the following points if you plan to install the Compact Field Unit:
● Ensure that the space in the control cabinet or components in the surrounding area is
sufficient for the heat to be removed.
See the following table
● When mounting on a mounting rail, pay attention to the distance between the fixing points:
maximum distance 500 mm - measured between the first and the last fixing point
● Leave sufficient space for the wiring and the communication cable connections.
● Route the cables away from the CFU as follows:
– Horizontal installation (see figure below):
Route cables downwards.
– Vertical installation (interface dome at bottom; rotated 90° counterclockwise compared
to the figure below):
Route cables to the right.
Table A-9 Minimum clearances in the control cabinet
Top
20 mm
Left
10 mm
Right
10 mm
Bottom
20 mm
Appendix
A.4 Mounting rules
SIMATIC CFU
Commissioning Manual, 08/2019, A5E39252870-AD
185