What are IP protection classes?

IP protection classes determine the extent to which electrical equipment is protected from contact, foreign bodies and water. The numbers of the IP protection classes are defined in IEC/EN 60529 and consist of two digits. The first digit indicates the protection from contact and dust and the second digit the protection from the ingress of water.

Common protection classes are IP00, IP20, IP40, IP44, IP54, IP65, IP67 and IP68. 

PULS DIN rail power supplies are generally in protection class IP20, while field power supplies (FIEPOS) are available in the higher protection class IP65/67.