XS2/XS3 Round Water-Resistant Connectors Omron Electronics' XS2/XS3 Round Water-Resistant Connectors have been extended with an M12 style connector portfolio with an IP69K rated model that boasts stainless steel nuts. The careful development and introduction of the new XS2 and XS3 series extensions are a strategic effort to fulfill design requirements for harsh environment applications. Typical applications include food & beverage industry (food processing or meat packaging), medical equipment, pharmaceutical manufacturing, heavy duty vehicle, and lighting for commercial buildings.