RJF Industrial Ethernet Connection System Amphenol Socapex RJF Industrial Ethernet Connection System is IP68 sealed for harsh environment applications such as industrial process control, oil & gas, motion control, robotics, wind energy, data acquisition, and transmission. The RJF system allows the use of an Ethernet Class D / Cat. 5e connection for 10BaseT, 100BaseTX or 1000 BaseT networks in harsh environments. With the patented RJStop® system, the Amphenol Socapex cd RJF Industrial Ethernet Connection System can use a standard RJ45 cordset in a metallic plug which will protect it from shocks, dust, and fluids. No tools or hazardous on-field cabling is necessary.