Also known as plenum-rated cords, these CMP ethernet cords have flame-resistant, low-smoke insulation and can be used without conduit in ductwork and above a drop ceiling. The RJ45 plugs on each end connect to Ethernet equipment, such as computers, IO modules, and programmable logic controllers (PLCs). Not only do these cords transmit data, but they also power devices that are Power over Ethernet (PoE) compatible. They’re often used with EtherNet/IP, Profinet, and EtherCAT systems.