General Note: To meet EMC requirements mentioned in chapter Compliances , it is essential to use shielded cables for connecting external devices. Connect shield properly to PE to ensure best EMC performance. Take care that the DIN Rail, on which your sat-nms IO-FEP2 is installed, is permanently connected to the same grounding point than the shield of your cabling. For Data connections use double shielded twisted pair cables. We recommend to use CAT7 S/FTP cable, e.g. DRAKA UC900 SS27 Cat.7 PUR.