GE 90-30 PLC Series Installation And Hardware Manual page 350

A
Table A-4. IBM-AT/XT Serial Port Pins-out
IB
M-
AT
Pin
No.
DCD
2 RD
3 TD
4 DTR
5 GND
6
7 RTS
8 CTS
9
NC = Not Connected
A-6 Series 90-30 PLC Installation and Hardware Manual – August 2002
Signal Description
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
NC
Request to Send
Clear to Send
NC
IBM-XT
Pin No. Signal Description
NC
2 TD Transmit Data
3 RD Receive Data
4 RTS Request to Send
5 CTS Clear to Send
6 NC
7 GND Signal Ground
8 DCD Data Carrier Detect
9 DTR Data Terminal Ready
GFK-0356Q