Serial interface rs-232c / rs-422, Interface characteristics – Output Solutions C I - 8 0 6 0 User Manual

Page 124

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Appendix A System Interface Description

A-2

1.

Serial Interface RS-232C / RS-422

1.1

Interface Characteristics

Signal Description RS-232C

Pin No.

Direction

PG

Protective Ground

1

-

TXD

Transmit Data (from printer to host)

2

OUTPUT

RXD

Receive Data (from host to printer)

3

INPUT

RTS

Request to Send (printer is requesting data transfer from host)

4

OUTPUT

CTS

Clear to Send (host is ready to receive data from printer)

5

INPUT

DSR

Data Set Ready (host is requesting data transfer from printer,

6

INPUT

can not be used for flow control, internaly set to "1")

SG

Signal Ground

7

-

DTR

Data Terminal Ready (printer is ready to receive - see also on the

20

OUTPUT

following pages the data communication protocols for detail meaning

Signal Description RS-422

Pin No.

Direction

PG

Protective Ground

1

-

RDA

Receive Data (from host to printer)

3

INPUT

SDA

Send Data (from printer to host)

9

OUTPUT

SDB

Not Send Data (from printer to host)

10

OUTPUT

RDB

Not Receive Data (from host to printer)

18

INPUT

S Transmission rate:

600, 1200, 2400, 4800, 9600, 19200, or 38400 baud

S Parity:

even, odd, or none

S Word length:

7, or 8 bits

S Number of stop bits: In receive mode the printer accepts 1, or 2 stop bits. The

printer transmits always two bits.

Transmission Protocols:

S DTR - Ready/Busy (only RS-232C)
S XON/XOFF
S XON/XOFF + DTR (only RS-232C)

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