Elmo Absolute PTZ driver/units,
                  connections for RS485 2-wire half duplex.


         Video Encoder                 Elmo PTZ unit

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RS485 2-wire serial                    Elmo PTC-400C, PTC-1000
communication                          
                                     RS-485 (5 pin connector (white))
      Signal Name  Terminal           Pin, Cable Colour, Signal Name
      RX+/TX+      A+ ---------------  1   Brown         DATA (+) IN
      RX-/TX-      B- ---------------  2   Red           DATA (-) IN
                                       5   Green         GND

                                       DIP-switch settings:
                                       1: OFF, Leave in OFF position.

                                       2: OFF,
                                          ON,  Set factory default.

                                       3: OFF, RS485 termination OFF.
                                          ON,  RS485 termination ON.

                                       4: OFF, Leave in OFF position.

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