Inferface Specifications

Signal

 

 

 

 

 

Pin

Signal

RS-232C RS-422A Direction

 

 

 

 

 

 

 

 

10

 

 

SD

 

 

(SD+)

OUT

 

 

 

 

 

 

non-

 

 

 

 

 

 

 

invert

 

 

 

 

 

 

 

 

 

11

 

 

REV

*

 

 

OUT

 

 

 

 

 

 

 

 

 

 

 

 

 

18

 

 

RD

 

 

(RD+)

IN

 

 

 

 

 

 

 

 

20

 

 

DTR

*

 

 

OUT

 

 

 

 

 

25

+5V DC

*

* Signal is operational for the interface.

Description

Send data. This pin sends serial

data from the printer to the computer. Signal level is RS-422A.

Same as DTR.

Receive data. This pin transmits serial data from the computer to the printer. Signal level is RS-422A.

Data terminal ready. This pin indicates whether or not the printer is ready to receive data. If the printer ready protocol is not selected, this pin is always HIGH (i.e. the printer is ready to receive data). If printer ready protocol is selected, the printer can accept data when the pin level is HIGH, and cannot accept data when the pin level is LOW, when busy.

Not a signal, but a +5V power supply output. Maximum of 300mA.

Technical Specifications B-13