Serial Port Pin Outs; Pin D Serial Port Rs232 Cables - Brainboxes CC-607 Hardware Manual

PCI Photon Twin 9

Serial Port Pin Outs.

The pinouts of the 9 and 25 pin Male D connectors are given
below.
Figure 4-2. Serial Port RS232 Pin Outs.
9 Pin connector:
25 Pin connector:

9 Pin D Serial Port RS232 Cables.

To connect to the AT style RS232 Serial Port you will need a
cable terminating in a 9 way female D connector. It is sound
practice to use cables with screws fitted that will allow you to
fasten the cable securely to the PC card.
In general, you will need to make up a "cross over" cable to
correctly interface the PC to the RS232 port of another computer
or device. Traditionally, making up the cross over cable has been
RS232 Pinouts and Cabling
Chapter 4 Page 35