Brainboxes CC-431 Hardware Manual page 42

RS232 Pinouts and Cabling
Figure 4-5. 9 To 25 Way Adapter.
This adapter cable makes the AT style 9-pin serial port, look like
the standard PC 25 pin serial port. It is NOT a cross over cable!
9 Pin AT SERIAL PORT
9 Pin Female D Connector
SCHEMATIC REPRESENTATION:
5
1
2
3
4
6
7
8
9
ACTUAL REPRESENTATION:
Chapter 4 Page 40
PCI 3 Port RS232
25 Pin PC SERIAL PORT
25 Pin Male D Connector