Profibus dp fieldbus fiber optic repeater achieve the long distance transmission by fiber optic of Siemens dp fieldbus, can be a substitute for the Siemens imported models: OLM G11/12/22 fiber optic link module. Profibus dp fieldbus fiber optic repeater successfully used for Thermal Power Plant Assist Network Control, Coal Dressing Auto-Control, Mine Belt Conveyor, Wind Power Converter, Variable Frequency Drive, mine hoisting, AC and DC Speed Control, Hydropower Station, Metallurgy EIC Control, Waster Water Treatment, Blast Furnace Control, Coke Oven Automation, Automatic Line, Sinter Plant and other projects. Profibus dp redundant link repeater is upgraded on the original model Ci-pf110/120, there are 2 groups of profibus dp interface, which can simultaneously transmit 2 channels of profibus dp fieldbus signal on the upgraded equipment, and the 2 groups of fiber ports can make up fiber-optic ring network, the system will rebuild the network link within 10ms when the link failures somewhere, to guarantee the system communicate normally, achieve the function of self-healing protection of signal transmission, the system will automatically recover after the network failure recovery. profibus dp fieldbus fiber optic repeater achieve the function of the transformation between electrical signal and fiber optic signal of profibus do fieldbus. Equipment featured: adopting the mode of directly forwarding, no frame loss, higher reliability and real-time; low time-delay supply the guarantee of real-time; dual power supply circuit built-in the machine can achieve the true dual power redundant backup; which adopts the high-quality power module to supply 1000V voltage isolation; solid and beautiful DIN rail design with aluminum alloy and wave pattern casing; adopting the parts with famous brand and industrial grade, to make products with industrial grade.