Zebra HW46211 User Manual

Page 1-12

110XiIIIPlus Maintenance Manual

13185L-002 Rev. A 1/24/06

Section 1

System Description

Communication Buffer

The size of the buffer is 5000 characters. As data is received by the processor monitors the 

number of characters in the buffer. If the buffer is filled beyond 4744 characters, the Data 

Terminal Ready (DTR) control leads to the off condition (negative voltage) or transmits an 

XOFF (DC-3) control character to the host. When the buffer empties below 4250 

characters, DTR turns on (positive voltage) or transmits an XON (DC-1) control character 

to the host.

Serial Data Communication Interface Overview

The connection for this standard interface is made through the female DB-9 connector on 

the rear panel. A DB-9 to DB-25 interface module is available for all RS-232 connections 

through a DB-25 cable.

For all RS-232 input and output signals, the printer follows the specifications of the (EIA) 

RS-232 and (CCITT) V.24.

The table below shows the pin configuration and function of the rear panel serial data 

connector on the printer.

1

—

Not connected

2

RXD

Receive data—data input to printer

3

TXD

Transmit data—data output from printer

4

DTR

Data terminal ready—output from printer

5

SG

Signal ground

6

DSR

Data set ready—input to printer

7

RTS

Request to send—output from printer

8

CTS

Clear to send—input to printer

9

+5 VDC

+5 VDC signal output

Notes • Pin 9 is also available as a +5 VDC power source at 750 mA. The 
maximum current draw may be limited by option configuration. To enable this 
capability, a jumper on the computer’s main logic board needs to be installed on 
JP1, pins 2 and 3.

An interface module is required for RS-422/RS-485 interface support.