Optical data coupler LS684-DA-EN/F1 LS684-DA-EN/F1 Independent of Ethernet protocol Optimized for real-time Ethernet such as PROFINET IRT and EtherCAT TCP/IP, PROFINET, PROFIsafe, EtherCAT, FSoE, EtherNet/IP, Ethernet POWERLINK etc. No parameterization Line indicator for signal strength