Connector pin assignments and a description of their respective interface signals are shown in the table below.

Signal pin

Signal

 

 

Direction

Description

1

 

 

 

 

 

 

 

 

 

FG

 

 

 

 

 

Chassis around

 

 

 

 

 

 

2

 

TXD

 

 

OUT

Transmits data for

 

 

 

 

 

 

 

 

XON/XOFF

 

 

 

 

 

 

 

 

 

3

 

RXD

 

 

IN

Receives data

4 - 6

 

NC

 

 

 

 

 

Not connected

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

SG

 

 

 

 

 

Signal ground

 

 

 

 

 

 

8-10

 

 

 

 

 

 

 

 

 

NC

 

 

 

 

 

Not connected

 

 

 

 

 

 

11, 20

 

 

 

 

 

 

 

 

 

DTR

 

 

OUT

Indicates whether or not

 

 

 

 

 

 

 

 

the printer is ready to

 

 

 

 

 

 

 

 

receive input data. If data

 

 

 

 

 

 

 

 

input is not ready, DTR =

 

 

 

 

 

 

 

 

“MARK”.

 

 

 

 

 

 

 

 

 

12-19

 

NC

 

 

 

 

 

Not connected

 

 

 

 

 

 

21-25

 

 

 

 

 

 

 

 

 

NC

 

 

 

 

 

Not connected

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The column heading “Direction” refers to the direction of signal flow from the printer.

Optional interfaces

The interface cards that may be used with this printer are listed on page 4-14.
A-14Technical Specifications