Siemens SIMATIC NET PROFIBUS Installing Network Components Cubicles, IP Degrees of Protection

Installing Network Components in	E
Cubicles

E.1 IP Degrees of Protection

Electrical equipment is normally surrounded by a protective casing. The purpose of this casing includes

SProtection of persons from touching live components or moving parts (accidental contact protection)

SProtection of equipment from intrusion of solid foreign bodies (solid body protection)

SProtection 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:

IP 5 4

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	E-1
6GK1970-5CA20-0AA1 Release 2 05/2000