Siemens SIMATIC NET PROFIBUS manual Degree of Protection

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	Contact and Solid Body		Water Protection
Number	Protection
0	No protection		No protection
1	against solid bodies ≥	50 mm	dropping vertically
	diameter
2	against solid bodies ≥	12 mm	dropping inclined at 15°
	diameter
3	against solid bodies ≥	2.5 mm	spray water, inclined up to 60°
	diameter
5	against solid bodies ≥	1 mm	spray water from any direction
	diameter
6	dust deposits		spray water – water jet from
			nozzle
7	ingress of dust (dustproof)		Heavy spray water
8	–		intermittent immersion at
			specified pressure for specified
			time

9

–

permanent immersion at specified pressure for specified time

E-2	PROFIBUS Networks SIMATIC NET
	6GK1970-5CA20-0AA1 Release 2 05/2000