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 ELECTRICAL CONNECTIONS 
4
37
SITRANS FX300
www.siemens.com/flow
06/2009 - SFIDK.PS.050.F2.02   A5E02100423
4.5  Protection category
The measuring device meets all requirements of protection category IP66/67.
Therefore it is essential to observe the following points:
•  Use only original gaskets. They must be clean and free of any damage. Defective gaskets must 
be replaced.
•  The electrical cables used must be undamaged and must comply with regulations.
•  The cables must be laid with a loop 1 upstream of the measuring device to prevent water 
from getting into the housing.
•  The cable feedthroughs 2 must be tightened.
•  Align the measuring device so that the cable feedthrough is never facing up 3.
•  Close the unused cable feedthroughs using blind plugs 4.
•  Do not remove the required cable bushing from the cable feedthrough.
DANGER!
After all servicing and maintenance work on the measuring device, the specified protection 
category must be ensured again. 
Figure 4-6: Cable feedthrough
MA_Siemens_Sitrans_FX300_R02_en_PRT.book  Page 37  Monday, June 22, 2009  8:17 AM