QMS PS 410, User Manual

Page: 225 / 288

Appendix A
IBM PC
To connect a stand-alone computer to your printer through the
25-pin serial interface requires a null modem cable.
following
tables show the suggested for a null modem using DTR for
the IBM PC/XT and IBM PC/AT or compatible computers. The
cable has a
male connector on the printer end and either a
or female connector on the computer end.
Computer
25 or Male 25-Pin Female
25 or Female
Male
Serial Cable
Fig. A.1
Serial Cable
RS-232C
Pi No. Name
1 Chassis
Ground
2
Transmit Data
3
Receive Data
4
Request To Send (optional)
5
Clear To Send
6
Data Set Ready (optional)
7
Signal Ground
8
Carrier Detect
20
Data Terminal Ready (optional)
C a b l e
A - l