Epson ES-1200C - Manual (Page 62)

Slgnal pln assignments (continued)
No. pin
19-30
No. pin
19-30
31
32
33
34-35
36
Signal
NC
GND
NC
DIR
Function
Twisted pair return signal
ground level
IN When this signal level
becomes low. the
scanner reset to the
when power Is
turned on. This level is
usually High. The pulse
must be more
than 50 microseconds
the receiving
Not used
pair return slgnal
ground level
IN
Not used
Low indicates the
direction is input.
“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 the ground connected to the chassis of the
host computer and the scanner.
All interface conditions are based on TTL level.
Technical Specifications 4-7