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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
)
2
0
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 2
0
ER (DTR)
SG 7 7
SG
ER (DTR
)
2
0
5
6
CS (CTS)
DR (DSR)
✒ Note
Any pins not shown in the figures above are not connected.