Epson C82305 - Manual (Page 23)

Pin No. Signal Name Direction*
17 TTY-TXD o u t
24
T T F T X D
Return
Description
High impedance (‘SPACE’)
between pin No. 17 and No
24 or an X-on signal sent
across pin No. 17 and No.
24 indicates that the printer
is ready to accept data. Low
impedance (‘MARK’) or an
X-off signal being sent
indicates that the printer is
busy. Operator can invert
the polarity of this signal
with jumper J5.
—
25 T T Y _ R X D
I n
23
T e x t
—
R e t u r n
Input data of serial Current
Loop.
Note
• The column heading “Direction” refers to the direction
of signal flow as viewed from the printer.
• All signals except TTY-TXD and TTY-RXD comply
with the EIA RS-232D standard.
20