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Using the serial port – Xerox 3270 User Manual

Page 32

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3270 Programmer’s Guide
Appendix A

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Appendix A: RS 232/V24 Cable
Connection

(serial support)

Using the serial port

The following connections are available in the serial plug:

pin 1

NC

pin 2

RX data

pin 3

TX data

pin 4

DTR

pin 5

GND (Signal)

pin 6

DSR (Busy)

pin 7

RTS (always high)

pin 8

CTS

pin 9

N.C.

Example: Cable connections to HP LaserJet III:
converter

HP LaserJet III

Cable type: DB9 male

Cable type: DB25 male

pin 2: __________________________________ pin 2
pin 3: __________________________________ pin 3
pin 4: _________________________________ pin 7
pin 5: _

________________________________ pin 20
pin 6: _

pin 7:

If the attached printer supports X_ON/X_OFF, you should use the
following protocol for the simplest setup.
You only require the following cable:

converter

Printer

2

Cable type: DB9 male

Cable type: dB25 male

pin 2: __________________________________ pin 2
pin 3: __________________________________ pin 3
pin 5: __________________________________ pin 7
pin 6: ___
pin 7: ___

2

For further information, please refer to the technical reference manual for the printer used.