---------
    |         |
    | DS18S20 |
    |         |
    |         |
     ---------
      |  |  |
      |  |  |        [CN]                     [DS9097U-009]
      |  |  |          6        4 wires     6 ==========\
      |  |  NC         5 ...................5            ===>>
      |  +---------->> 4 ...................4               >> RS-232C
      +------------->> 3 ...................3               >>  (COMn)
                       2 ...................2            ===>>
                       1                    1 ==========/