Siemens SIMATIC NET PROFIBUS Owner's Manual page 322

Installing Network Components in Cubicles
Degree of Protection
The various degrees of protection are shown and explained briefly in Table E–1.
For more detailed information on the individual ratings and the test conditions that
must be fulfilled, please refer to the standards listed above.
Table E-1 Degree of Protection Afforded (Brief Outline)
Code
Number
0
1
2
3
5
6
7
8
9
E-2
Contact and Solid Body
Protection
No protection
against solid bodies 50 mm
diameter
against solid bodies 12 mm
diameter
against solid bodies 2.5 mm
diameter
against solid bodies 1 mm
diameter
dust deposits
ingress of dust (dustproof)
–
–
Water Protection
No protection
dropping vertically
dropping inclined at 15
spray water, inclined up to 60
spray water from any direction
spray water – water jet from
nozzle
Heavy spray water
intermittent immersion at
specified pressure for specified
time
permanent immersion at
specified pressure for specified
time
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000