Network Card User Manual

5. Handshaking
Table 15. Handshaking
RS-232D
Using DTR
Using X-on/X-off
protocol
protocol
The signal at pin No. 20 is
as follows;
Data transmitted from pin
No. 2 is controlled as
MARK-data transfer follows;
disabled
X-on (11H)—data transfer
SPACE-data transfer enabled
enabled
X-off (13H)—data transfer
(Signal polarity can be
disabled
inverted by DIP-switch
setting.)
RS-422A
The signal at pin No. 11
with respect to pin No. 13
Data transmitted by the
differential voltage of pin
is:
No. 9 to pin No. 10 is
MARK-data transfer controlled as follows:
disabled
X-on (11H)—data transfer
SPACE-data transfer
enabled
enabled
X-off (13H)—data transfer
(Signal polarity can be disabled
inverted by DIP switch
setting.)
Current
Loop The impedance between
pin No. 17 and pin No. 24
Data transmitted by the
is as follows;
change of the impedance
between pin No. 17 and
LOW (MARK)—data
pin No. 24 is controlled as
transfer disabled
follows;
HIGH (SPACE)-data X-on (11H)—data transfer
transfer enabled enabled
(Signal polarity can be X-off (13H)—data transfer
inverted by DIP-switch disabled
setting.)
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