Lexmark C762, C760 manual 8-19, How to Connect the RS-232C Serial Interface, Interfaces

Models: C762 C760

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8-19

8-19 How to Connect the RS-232C Serial Interface

Interfaces

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:

 

 

25-Pin

25-Pin

 

 

13

25

D-Shell

D-Shell

13

25

 

 

(Male)

(Female)

 

 

1

14

1

14

 

Printer

Computer

 

 

Side

Side

 

Table 8-3: Dedicated Serial Connector Pin Assignments (RS-232C)

Pin

Signal

Direction

Description

1

GND

 

Frame Ground

 

 

 

 

2

TXD

Out

Transmit Data. The pin transmits data to your computer or

 

 

 

terminal.

 

 

 

 

3

RXD

In

Receive Data. The pin receives data from your computer or

 

 

 

terminal.

 

 

 

 

4

RTS

Out

Request to Send. The printer sets this signal high and the

 

 

 

signal remains high while the printer is on.

 

 

 

 

5

CTS

In

Clear to Send. This pin is optionally used for serial data flow

 

 

 

control protocol when in serial mode.

 

 

 

 

6

DSR

In

Data Set Ready. This pin is optionally used for data

 

 

 

validation, depending on the Honor DSR setting, or flow

 

 

 

control, depending on the Serial Protocol setting.

 

 

 

 

7

GND

 

Logic Ground

 

 

 

 

20

DTR

Out

Data Terminal Ready. This pin is optionally used for serial

 

 

 

data flow control protocol when in serial mode.

 

 

 

 

Page 311
Image 311
Lexmark C762, C760 8-19, How to Connect the RS-232C Serial Interface, RS-232C Serial Cable Pin Assignments, Interfaces