Device Master RJ-45 to DB9 Adapters

AN!Wiki :: Device Master RJ-45 to DB9 Adapters

I originally wrote this for Interlink on behalf of CC Systems. I copied it here to make it available outside their intranet.

RJ-45 Pins

RJ-45 Pin 1 is top/left most pin when looking at the connector with the retention clip facing down.

Male

Clip is behind the connector.

    ______________________
   |                      |
___|    ___       --------| <- Pin 1
C  |   |   |      --------|
a  |   | | |      --------|
b  |   | | |      --------|
l  |   | | |      --------|
e  |   | | |      --------|
___|   |___|      --------|
   |              --------| < Pin 8
   |______________________|

Female

 ____________________
|                    |
|      ___________   |
|   __|           |  |
|  |            --|  | <- Pin 1
|  |            --|  |
|  |            --|  |
|  |            --|  |
|  |            --|  |
|  |            --|  |
|  |            --|  |
|  |__          --|  | <- Pin 8
|     |___________|  |
|                    |
|____________________|

Serial Connector

The DB-9 Pins are labeled both on the front and on the back of the connector.

Serial Adapter

This connector does not reverse the send and receive pins.

Wiring Diagram

              1   2   3   4   5
              o   o   o   o   o
DB9 -         | 6 | 7 | 8 | 9 |
              | o | o | o | o |
              | | | | | | | x |
              | | | | | | |   |
           /--+-+-+-/ | | |   |
           |  | | |   | | |   |
           |  | | | /-/ \-+---+-\
           |  | | | |     |   | |
           |  | | \-+--\  \-\ | |
           |  | |   |  |    | | |
           |  | \---+--+----+\| |
           |  \-----+--+--\ ||| |
           |        |  |  | ||| |
           |  /-----+--+--+-/|| |
           |  |     |  |  |  || |
           |  |  /--+--+--+--+/ |
           |  |  |  |  |  |  |  |
RJ-45 -    o  o  o  o  o  o  o  o
           1  2  3  4  5  6  7  8
           |  |  |  |  |  |  |  |
           B  O  B  R  G  Y  B  W
           l  r  l  e  r  e  r  h
           u  a  a  d  e  l  o  i
           e  n  c     e  l  w  t
              g  k     n  o  n  e
              e           w

RJ-45 Coloured Pins to DB9 Pin Numbers

   Y           O
   e   G       r   B
   l   r       a   l
   l   e   R   n   a
   o   e   e   g   c
   w   n   d   e   k
   |   |   |   |   |
 1 *   *   *   *   *   
                   
     *   *   *   * 9
     |   |   |   |
     B   B   W   x
     r   l   h
     o   u   i
     w   e   t
     n       e

-------

Pin | Colour
----+--------
 1  | Yellow
 2  | Green
 3  | Red
 4  | Orange
 5  | Black
 6  | Brown
 7  | Blue
 8  | White

Null Modem Adapter

This connector does reverse the send and receive pins.

Wiring Diagram

              1   2   3   4   5
              o   o   o   o   o
DB9 -         x 6 | 7 | 8 | 9 |
                o | o | o | o |
                | | | | | | x |
                | | | | | |   |
                | | \-+-+-+---+-\
           /----+-+---+-/ |   | |
           |    | |   |   \--\| |
           |  /-/ \-\ \\     || |
           |  |     |  |     || |
           |  |  /--+--+-----+/ |
           |  |  |  |  |  x  |  |
RJ-45 -    o  o  o  o  o  o  o  o
           1  2  3  4  5  6  7  8
           |  |  |  |  |  |  |  |
           B  O  B  R  G  Y  B  W
           l  r  l  e  r  e  r  h
           u  a  a  d  e  l  o  i
           e  n  c     e  l  w  t
              g  k     n  o  n  e
              e           w

RJ-45 Coloured Pins to DB9 Pin Numbers

           G   B   B
           r   r   l
       R   e   o   a
       e   e   w   c
   x   d   n   n   k
   |   |   |   |   |
 1 *   *   *   *   *   
                   
     *   *   *   * 9
     |   |   |   |
     O   W   B   x
     r   h   l
     a   i   u
     n   t   e
     g   e   
     e

-------

Pin | Colour
----+--------
 1  | n/c
 2  | Red
 3  | Green
 4  | Brown
 5  | Black
 6  | Orange
 7  | White
 8  | Blue
 9  | n/c

 

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