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APPENDICES
Appendix–13
Serial Cable Connection for IBM-PC/AT or Compatible
Computers and IBM-PS/2 Computers
The following diagrams show the pin connections for the most common
serial communications.
■ DB-9 Serial Connection
When you use a computer with a 9-pin serial port, use a cable with the
following pin configurations.
Printer (Male) Computer (Female)
SD 2 2 RD
RD 3 3 SD
DR (DSR) 6 4 ER (DTR)
SG 7 5 SG
ER (DTR) 20 6
8
DR (DSR)
CS (CTS)
■ DB-25 Serial Connection
When you use a computer with a 25-pin serial port, use a cable with the
following pin configurations.
Printer (Male) Computer (Female)
FG 1 1 FG
SD 2 3 RD
RD 3 2 SD
DR (DSR) 6 20 ER (DTR)
SG 7 7 SG
ER (DTR) 20 5
6
CS (CTS)
DR (DSR)
✒ Note
Any pins not shown in the figures above are not connected.