Compuprint 9058 Programmer Manual Instrukcja Użytkownika Pobierz pdf (Strona 143)

The Serial Interface

A78408098-003

C.14

Signal

Name

Numb

Local

Connect.

Source

Remote

Connect.

Source

ISO/CC

ITT

Circuit

RS-

232/C

Circuit

Description

DCD 8 Data Set 109 CF Active HIGH level

signal. Indicates that

the host is

transmitting or the

data set is receiving

the Data Carrier

signal..

RTS 11 Printer 120 SCA Functionally

equivalent to the

DTR signal.

DTR 20 Printer Printer 108 CD Data Terminal

Ready. Normally

HIGH (ON).

Indicates that the

printer is ready to

initiate a connection.

The following table lists the RS-422/A serial interface signals::

ISO Circuit ID Signal Source Pin

Number

Description

T (A) Printer 13 Transmit.

MARK signal is present when printer is

not sending data.

T (B) 14 Transmit Return.

R (A) Host 16 Receive.

A MARK level is expected when sender is

in idle state.

R (B) 19 Receive Return.

G 7 Signal Ground.

Always connected to the 0 Volt of the

power supply.

SHIELD 1 Cable Shield.

Optionally connected to the frame ground

of the printer via a suitable jumper.

1 2 ... 138 139 140 141 142 143

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