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Inferface Specifications

Serial interface pin assignments

The serial interface connector pin assignments and a description of

the interface signals are shown in the table below. The direction of

signals is given relative to the printer.

Signal

RS-232C RS-422A

Direction

OUT

(RD-)

invert

RTS

OUT

Description

Frame ground. Safety

ground line.

Transmit data.

This pin transmits serial

data from the printer to

the computer.

Receive data.

This pin transmits serial

data from the computer to

the printer.

Request to send. This pin

is HIGH when power is on.

CTS *

Clear to send. This pin

indicates that the computer

is ready to receive data

from the printer.

DSR *

Data set ready. This pin

indicates that the computer

is ready to communicate.

SG *

Signal ground. This pin

provides a ground for all the

signal lines.

(SD-)

OUT

Send data. This

invert

pin sends serial data from

the printer to the computer.

Signal level is RS-422A.

B-12

Technical Specifications

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