Pinout and
Cable
Specifications
QMS magicolor CX Reference Guide
3-6
IBM PC/XT, PC/AT, and Compatible Pinouts
This diagram gives the suggested cable pinouts for IBM PC/XT, PC/
AT, and compatible computers
Not all serial cables are configured as shown and may require an
additional null-modem adapter. Check with your cable vendor for
compatibility. To download printer system software via the serial port,
your hardware must have RTS and CTS support. Make sure that pins
4 and 5 on the 25-pin serial cable and pins 7 and 8 on the 9-pin serial
cable are criss-crossed as shown in this diagram.
To Printer
9-Pin
To CPU XT
25-Pin
To Printer
9-Pin
To CPU AT
9-Pin
1
Not Used
1
Not Used
RXD
2
2
RXD
RXD
2
2
RXD
TXD
3
3
TXD
TXD
3
3
TXD
DTR
4
20
DTR
DTR
4
4
DTR
DSR
6
6
DSR
DSR
6
6
DSR
GND
5
7
GND
GND
5
5
GND
RTS
7
4
RTS
RTS
7
7
RTS
CTS
8
5
CTS
CTS
8
8
CTS
9
Not Used
9
Not Used
Summary of Contents for 1800428-001B
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