AMT Datasouth Accel-7450 Guía de usuario descargar pdf (Pagina 34)

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2. Pin description:

3. Signal description:

Typical pin out ~

 Input signal: RXD and DSR

 Output signal: TXD and DTR

 RXD: The printer receives data

 DTR: High level denotes that the printer is ready to receive the data from the

HOST; contrarily, denotes the printer is BUSY and it is forbidden to receive

the data from the HOST.

 TXD: The printer sends data

Data bit format ~

 Data bit is fixed 8 bits, Stop bit is fixed 1 bit

Baud Rate ~

 Serial communication baud rate can be set through menu setting:

1200 bps, 2400 bps, 4800bps, 9600bps, 19200 bps

Interface Protocol ~

The DTR from printer controls the data stream between printer and HOST. When

DTR is high level, the printer is READY, it can receive the data from HOST. DTR

is high level in the following conditions:

 The printer is online.

 The data buffer of the printer is larger than limited value.

 The printer has no error.

Signal Name

Direction

FG Frame Ground

TXD Transmit Data

OUT

RXD Receive Data

RTS Request to Send

OUT

CTS Clear to send

DSR Data set ready

GND Ground

DCD Data carrier Detect

…

DTR Data terminal

ready

OUT

…

DTR

GND

TXD

DSR

DCD

CTS

GND

RXD

Printer 25 PIN connector

HOST 9 PIN connector

DTR

GND

TXD

RXD

DSR

DCD

CTS

GND

RXD

TXD

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AMT Datasouth Accel-7450 Guía de usuario Pagina 34

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