Using The Rs-232C Serial Interface - Lexmark C752 Technical Reference

When using the serial interface, your printer has the following differences from the
serial interface on some other printers:
•
•

Using the RS-232C Serial Interface

This section describes how to use the RS-232C serial interface. If you are using
RS-422, see "Using the RS-422 Serial Interface" on page 8-35.
How to Connect the RS-232C Serial Interface
Use Lexmark serial cable P/N 1038693 (15.24 m or 50 ft) to connect the serial
interface.
RS-232C Serial Cable Pin Assignments
The RS-232C serial cable appears as follows:
Table 8-4: Dedicated Serial Connector Pin Assignments (RS-232C)
Pin
1
2
3
The printer returns XON/XOFF with 2 stop bits in all cases.
The printer does not support DTR inversion.
25-Pin
D-Shell
13 25
(Male)
1 14
Printer
Side
Signal Direction Description
GND Frame Ground
TXD Out Transmit Data. The pin transmits data to your computer or
terminal.
RXD In Receive Data. The pin receives data from your computer or
terminal.
8-25
Interfaces
25-Pin
D-Shell
13 25
(Female)
1 14
Computer
Side