Compuprint 9058 Programmer Manual Instrukcja Użytkownika Pobierz pdf (Strona 142)

The Serial Interface

A78408098-003

C.13

Serial Interface Signals

The following table lists the RS-232/C serial interface signals:

Signal

Name

Number

Local

Connect.

Source

Remote

Connect.

Source

ISO/CC

ITT

Circuit

RS-

232/C

Circuit

Description

FRAME

GROUND

1 - - 101 AA This printer is

shipped with pin 1

connected to the

frame ground

(protective ground).

TXD 2 Printer Printer 103 BA Transmitted Data

Signal (an output

from printer). A

MARK condition is

held during IDLE

communication

state. An

indeterminate state

is present when

printer is powered

off.

RXD 3 Host Data Set 104 BB Received data signal

(an input to printer)

RTS 4 Printer Printer 105 CA Request to Send

Signal (an output

from printer).Active

HIGH level signal. It

is HIGH until the

printer is powered

off, then an

indeterminate state

is present .

CTS 5 Data Set 106 CB Active HIGH level

signal indicates that

the host or data set

is ready to receive

data from the

printer..

DSR 6 Data Set 107 CC Active HIGH level

signal. Indicates

that the host or data

set is ready to be

connected to the

printer and is ready

for data transfer.

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