D Type Connector Pin Numbering

Many computer related connectors involve the use of 'D-type' plugs and sockets. Often the pin numbers are written next to the pin on the connector body -but not always! These numbers are extremely tiny, and it easy to become confused with which is which when the numbers appear on one side of the connector and the wiring is on the other.

The important thing to remember is that the rows of pins are numbered typewriter style. The numbers increment away from pin one to the end of the row, then the numbering continues by starting back at the start of the next row (the way a typewriter would print).

This applies regardless of the number of pins or the number of rows. The diagrams below illustrate what is where depending on where you're looking from:

This is looking into the mating face of a female connector

This is looking into the mating face of a male connector

This is looking into the solder buckets of a female connector

This is looking into the solder buckets of a male connector