20
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.
17
TTY-TXD
Out
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 J2.
24
TTY-TXD
Return
-
25
TTY-RXD
In
Input data of serial Current Loop.
23
TTY-RXD
Return
-
Pin No. Signal Name Direction*
Description