Communication ports, Serial input cable – Oki X400 User Manual
Page 23
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Communication Ports
OKIPOS X400 printers are equipped with a standard Centronics parallel
and an RS232 communication port, wired as shown below.
Serial Input Cable (DB9S)
Pin #
Description
2
RXD (data to printer)
3
TXD (data from printer)
4 DTR,
always
high
5 GROUND
6
DSR, connected to pin 4, always
high
7 RTS
(printer
busy)
8 CTS
1,9 +5V
21
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