Page 210 - Sensors and Control Systems in Manufacturing
P. 210

Fiber Optics in Sensors and Contr ol Systems
                                                 Fiber Optic Cable                     171
                                                   2000 Meters
                                                                 Fiber Optic
                                                   (Maximum)      Line Driver  Processor
                                      2000 Meters
                                      (Maximum)                  Fiber Optic
                                                                            Processor
                                                                  Line Driver
                                                 Fiber Optic
                      Industrial  Fiber Optic
                                                  Terminal
                      Terminal   Line Driver
                                                  Expander
                                                                 Fiber Optic
                                                                  Line Driver  Processor
                                     Fiber Optic Cable
                                                                 Fiber Optic  Processor
                                                                  Line Driver

                     FIGURE 3.49  Master industrial terminal and remote processors.






























                     FIGURE 3.50  Passive optical coupler.


                          power budgets for well-designed industrial links normally provide a
                          much greater latitude in making a connection. A 5- to 6-dB-loss con-
                          nection, while potentially catastrophic in other types of systems, may
                          be quite acceptable in short-haul systems with ample power budgets.
                             The most popular connector style for industrial communications
                          is the SMA style connector, distinguished by its nose dimensions and
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