USER’S GUIDE

Signal Description

Signal Name

IN/OUT Explanation

FG

–

Frame Ground

 

 

 

SD

OUT

Send Data.

 

 

 

RD

IN

Receive Data. Receives data transmitted from the

 

 

computer.

 

 

 

RS

OUT

Request To Send. “S PACE” level when the

 

 

printer is ready to send data to the computer.

 

 

 

DR

IN

Data Set Ready. When DSR is at “S PACE” level,

 

 

data can be accepted.

 

 

 

SG

–

Signal Ground

 

 

 

ER

OUT

Data Terminal Ready. “M ARK” level when the

 

 

printer is Busy.

 

 

 

A–12