Interface

Specifications

 

 

 

 

Signal Return

Signal Direction

-lptiofl

Pin

Pin

 

 

1028 m OUT About a 1Pmicrosecond pulse. LOW indicates that data has been received and that the printer is ready to accept more data.

11

29

BUSY

OUT

A HIGH signal indicates that the printer

 

 

 

 

 

cannot receive data. The signal goes

 

 

 

 

 

HtGH in the following cases:

 

 

 

 

 

1) during data entry (ea. char. time)

 

 

 

 

 

2) when off line

 

 

 

 

 

3) during a printer error state

 

 

 

 

 

4) during printing

 

 

 

 

 

 

12

30

PE

OUT

A HIGH signal indicates that the printer

 

 

 

 

 

is out of paper.

 

 

 

 

 

 

13

-

-

-

Pulled up to +5 volts through 3.3K ohm

 

 

 

 

 

resistance.

 

 

 

 

 

 

14

-

m

IN

When this signal is LOW, the paper is

 

 

 

FEED

 

automatically fed one line after printing.

 

 

 

 

 

(The signal level can be fixed to this by

 

 

 

 

 

turning on DIP switch 2-4.)

 

 

 

 

 

 

15

-

NC

-

Not used.

 

 

 

 

 

 

16

-

ov

-

Logic ground level.

 

 

 

 

 

17

-

C H A S S I S -

Printer’s chassis ground, which is

 

 

 

GND

 

isolated from the logic ground.

 

 

 

 

 

 

18

-

NC

-

Not used.

 

 

 

 

 

 

19-30

-

GND

-

Twisted-pair return signal ground level.

 

 

 

 

 

 

31

-

lNlf

IN

When this level becomes LOW, the

 

 

 

 

 

printer controller is reset to its power-up

 

 

 

 

 

state and the print buffer is cleared. This

 

 

 

 

 

level is usually~H/GH; its pulse width

 

 

 

 

 

must be more man 56 microseconds at

 

 

 

 

 

the receiving terminal.

8-12 Technical Specifications