18

-

NC

-

Not used

 

 

 

 

 

19−30

-

NC

-

Twisted-pair return signal

 

 

 

 

ground level

 

 

 

 

 

31

-

INIT

IN

When this signal level goes

 

 

 

 

Low, the scanner is reset to

 

 

 

 

its power-up state. This

 

 

 

 

level is usually High. The

 

 

 

 

pulse width must be more

 

 

 

 

than 50 microseconds at

 

 

 

 

the receiving terminal.

 

 

 

 

 

32

-

NC

-

Not used

 

 

 

 

 

33

-

GND

-

Twisted-pair return signal

 

 

 

 

ground level

 

 

 

 

 

34−35

-

NC

-

Not used

 

 

 

 

 

36

-

DIR

IN

Low indicates the input

 

 

 

 

direction

 

 

 

 

 

❏‘‘Return’’ denotes the twisted-pair return, to be connected at signal ground level. For interface wiring, be sure to use a twisted-pair cable for each signal, and to complete the connection on the return side. These cables should be shielded and connected to the chassis of the host computer and the scanner.

❏All interface conditions are based on TTL level.

A-6Interface Specifications