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Industrial Redundant Ring Switch – RS Series User Manual
Appendix E
Ingress Protection (IP)
An IP number is used to specify the environmental protection of enclosures around
electronic equipment. These ratings are determined by specific tests.
The IP number is composed of two numbers, the first referring to the protection against
solid objects and the second against liquids. The higher the number is, the better the
protection.
Note: All ICP DAS RS Series devices are manufactured and tested to IEC IP51
standards.
First Number
Second Number
0
No protection (Sometimes X)
1
Protected against solid objects up to 50mm³
2
Protected against solid objects up to 12mm³
3
Protected against solid objects up to 2.5mm³
4
Protected against solid objects up to 1mm³
5
Protected against dust, limited ingress (no harmful deposit)
6
Totally protected against dust
0
No protection (Sometimes X)
1
Protection against vertically falling drops of water (e.g. condensation)
2
Protection against direct sprays of water up to 15 degrees from vertical
3
Protection against direct sprays of water up to 60 degrees from vertical
Protection against water sprayed from all directions - limited ingress
4
permitted
Protected against low pressure jets of water from all directions - limited
5
ingress permitted
Protected against low pressure jets of water, limited ingress permitted (e.g.
6
ship deck)
7
Protected against the effect of immersion between 15cm and 1m
8
Protected against long periods of immersion under pressure
TDRS4050601
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