... necessary.Optical Interface:Ø Wave Length: multi-mode 850nm,1310 nm; single-mode 1310 nm,1550nm.Ø Transmission Fiber: multi-mode 50/125 ... set rate and rate adaptive optional, use for daisy chain, star, ring and other network topologies, multi mode fiber 0~2Km, single mode fiber ... /FC optional.pcs profibus DP optical link module with dual DP and dual optical port for siemens plc OLM application ci-pf22-s ...