Forwardvision PTZ driver/unit,
                  connections for RS485 2-wire.


         Video Encoder                 Forwardvision PTZ unit

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RS485 2-wire serial                    Forwardvision
communication                          (MIC-IR-12PSU)

                Terminal             Terminal HD5
                    A+ --------------- RxB
                    B- --------------- RxA
                       --------------- 0v
                       --------------- TxA
                       --------------- TxB

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