Via a pair of JetCon 2401-s serial professional fiber converters with single media mode, Korenix greatly extends the control range of Genius Serial Bus of GE Fanuc PLC SUPPLIERS control up to 40 kilometers @ 153.6Kb baud rate successfully. It’s an enormous enhancement compared with the range of Maximum Length of twisted-pair Cable Run 7500 professional feet (2283m) @ 38.4Kb baud rate. During the communication certification test, two JetCon 2401-s units endure a heavy load of signal transmission of Genius Serial Bus protocol testing by wiring 22 GE VersaMax PLC units in multi-drop connection of Genius Serial Bus which being controlled by a GE Fanuc SERIES 90-30 CPU-364 module. Connecting the serial fiber network with two JetCon 2401 serial fiber converters in single media mode in between of GE Fanuc SERIES 90-30 CPU and the first VersaMax PLC unit, the serial signal propagation delays of Genius Serial Bus is measured in 440 nanoseconds with control signal running at 153.6Kb baud rate. The results of voltage attenuation and waveform distortion also meet the requirements of Genius Professional transceiver Electrical Specification. All the PLC control processes at GE VersaMax PLC ends have been well performed in sequence accurately. Vice versa at CPU end, it receives the signal delivery correctly from GE VersaMax PLC ends. Under the severe test environment, most serial fiber converter products on the market have been failed to deliver the correct signal or waveform of Genius Serial Bus with GE Fanuc PLC devices.