BECKHOFF EP1908 - Manual (Page 41)

Appendix
EP1908-0002 39
5 Appendix
5.1 Protection classes according to IP code
Protection classes defining different degrees of protection are specified in IEC 60529 (DIN EN 60529) as
follows:
1 st digit: Protection
against ingress of
dust and access to
hazardous parts
Meaning
0 Non-protected
1 Protection against access to hazardous parts with back of hand. Protection
against ingress of solid foreign objects = 50 mm diameter
2 Protection against access to hazardous parts with a finger. Protection against
ingress of solid foreign objects = 12.5 mm diameter
3 Protection against access to hazardous parts with a tool. Protection against
ingress of solid foreign objects = 2.5 mm diameter
4 Protection against access to hazardous parts with a wire. Protection against
ingress of solid foreign objects = 1 mm diameter
5 Protection against access to hazardous parts with a wire. Protection against
ingress of dust. Ingress of dust is not prevented completely, although the
quantity of dust able to penetrate is limited to such an extent that the proper
function of the device and safety are not impaired
6 Protection against access to hazardous parts with a wire. Dust-proof. No
ingress of dust
2 nd digit: Protection
against ingress of
water*
Meaning
0 Non-protected.
1 Protection against dripping water.
2 Protection against dripping water when housing tilted up to 15°.
3 Protection against spraying. Water sprayed at an angle of up to 60° from
vertical must not have any adverse effect.
4 Protection against splashing. Water splashing against the housing from any
direction must not have any adverse effects.
5 Protection against jetting.
6 Protection against powerful jetting.
7 Protection against the effects of temporary immersion. The quantity of water
being able to penetrate if the housing is submerged in water for 30 minutes at
a depth of 1 m must not have any adverse effects.
*) These protection classes only define protection against water, not against other liquids.