SATO CX400 - Manual (Page 23)

CX400 User Guide
PN 9001107 Rev. A Page 21
Communication Ports
CX400 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