KROHNE DK 46-47-48-800 EN - Manual (Page 20)

4
ELECTRICAL CONNECTIONS
20
DK46 - DK800
www.krohne.com 05/2011 - 4000302403 MA DK46-800-R03-en
4.7 Grounding connection
The measuring section is grounded on the back rail 1 (M4 thread). The connection guarantees
only an electrostatic connection of the device and does not comply with the requirements of
potential equalisation connection.
4.8 Protection category
The limit switch with connection housing meets all requirements as per protection category IP
65.
Therefore it is essential to observe the following points:
• Use only original gaskets. They must be clean and free of any damage. Defective gaskets have
to be replaced.
• The electrical cables used must be undamaged and must comply with regulations.
• The cables must be laid with a loop 3 upstream of the measuring device to prevent water
from getting into the housing.
• The cable glands 2 must be tightened.
• Close the unused cable glands using blanking plugs 1.
DANGER!
The grounding wire may not transfer any interference voltage.
Do not use this grounding wire to ground any other items of electrical equipment.
DANGER!
After all servicing and maintenance work on the device, the specified protection category has to
be ensured again.
MA_DK46_800_R03_en_302403_PRT.book Page 20 Thursday, May 19, 2011 8:26 AM