This articles outlines that I-Series 4.0 do not have a specific IP rating. but have protections in place to prevent water damage

I-Series 4 products do not carry a specific Ingress Protection (IP) rating; however, the touchscreen is sealed to the LCD which prevents any water from entering the unit from the front or sides. With PCAP technology being edge to edge glass, the front of the device is of course waterproof. 

Please see the Knowledge Article: IP Ratings, Ingress Protection, NEMA Rated, and Sealability of Elo Touch Products