E.1 Ip Degrees Of Protection - Siemens SIMATIC NET PROFIBUS Owner's Manual

Installing Network Components in
Cubicles
E.1 IP Degrees of Protection
Electrical equipment is normally surrounded by a protective casing. The purpose of
this casing includes
S Protection of persons from touching live components or moving parts
(accidental contact protection)
S Protection of equipment from intrusion of solid foreign bodies (solid body
protection)
S Protection of equipment from ingress of water (water protection).
IEC 60529, EN 60529
The degree of protection specifies the degree to which the casing meets these
three protective functions.
The degrees of protection are specified uniformly in the "International Standard
IEC 60529" or in the identical European standard EN 60529.
The degree of protection of a casing is indicated by a code. The code consists of
the letters IP (International Protection) followed by a code number for contact, solid
body and water protection as shown below:
Code letters
(International Protection)
1st code number (0 through 6)
Contact and solid body protection
2nd code number (0 through 8)
Water protection
In some situations, the degree of protection is specified in even greater detail by
adding letters to the code numbers.
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
IP 5 4
E
E-1