Installing the CFU in hazardous areas
● Refer to section "Use in hazardous areas (Page 29)".
● Read the information in the product information of the CFU.
CFU product information is supplied together with the product, or is available on the Internet
Customer Support (
http://support.industry.siemens.com/cs/) via the CFU article number
(see section "Article numbers (accessories / spare parts) (Page 181)").
Ambient temperature
You can find information about the ambient temperature in section "Rules for the operation
(Page 23)".
6.2 Installing the mounting rail
Mount the CFU on a mounting rail (DIN rail TH 35 in accordance with EN 60715).
You can find article numbers for mounting rails of different lengths in section "Article numbers
(accessories / spare parts) (Page 181)".
Lengths and drill holes
The mounting rails are available in the following lengths:
● 483 mm (19 inch)
The 483 mm mounting rail has two drill holes for fixing screws.
A set of screws for grounding is included.
● 2000 mm
The 2000 mm-mounting rail is provided for designs with special lengths and has no holes for
fixing screws.
Screws for grounding are not included with the mounting rail.
The specifications of the maximum distances between two drill holes can be found in the table
"Dimensions for the drill holes".
Required tools
● Suitable metal saw
● Drill ∅ 6.5 mm
● Screwdriver
● Size 10 adjustable screw-wrench or socket wrench for grounding cable connection
● Adjustable screw-wrench, matching the selected fixing screws
● Stripping tool and crimp tool for the grounding cable
Installation
6.2 Installing the mounting rail
SIMATIC CFU
48 Commissioning Manual, 08/2019, A5E39252870-AD
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