cleared. This level is

 

 

 

 

 

 

 

 

normally HIGH; its pulse

 

 

 

 

 

 

 

 

width must be more than 50

 

 

 

 

 

 

 

 

microseconds at the

 

 

 

 

 

 

 

 

receiving terminal.

 

 

 

 

 

 

 

 

 

32

-

 

 

 

OUT

This level becomes LOW

 

ERROR

 

 

 

 

 

 

 

 

 

when the printer is:

 

 

 

 

 

 

 

 

1) out of paper

 

 

 

 

 

 

 

 

2) in an error state

 

 

 

 

 

 

 

 

 

33

-

 

GND

 

-

 

Same as for pins 19-30

 

 

 

 

 

 

 

 

 

 

 

 

 

34

-

 

NC

-

Not used

 

 

 

 

 

 

 

 

 

35

 

-

 

 

 

OUT

Pulled up to 5 V through

 

 

 

 

 

 

 

 

 

 

 

 

 

1 .O k.Q resistance

 

 

 

 

 

 

 

 

 

^

-

 

NC

 

 

 

Not used

 

 

 

 

 

 

 

 

 

 

 

l-

Note:

0 The column heading ‘Direction” refers to the direction of signal flow as viewed from the printer.

0“Return” denotes the twisted-pair return, to be connected at signal ground level. For the interface wiring, be sure to use a twisted-pair cable for each signal and to complete the connection on the return

side.

CT All interface conditions are based on the TTL level. Both the rise and fall times of each signal must be less than 0.2 microseconds.

Appendix A-9