Hitachi IJ RX2 Service Manual page 110

[Specification of RS-232C communication connector]
- External equipment is connected to the EZJ129 by serial communication of RS-232C.
-Signal used : RD,SD,DTR,SG,DSR,RTS,CTS
-Wiring ( NC is No connection )
Pin number
1
2
3
4
5
6
7
8
9
#1
#6
Circuit board side connector: 9 pin D-sub connector (plug)
IJ Printer
Send data
Receive data
Name Input / Output
(NC) -
RD Input
SD Output
DTR Output
SG -
DSR Input
RTS Output
CTS Input
(NC) -
#5
#9
Output
SD
#3
Input
RD
#2
Output
DTR
#4
Input
DSR
#6
Output
RTS
#7
Input
CTS
#8
#5
SG
Cable length : maximum 5m
3-35
Remarks
No connection
Ground
No connection
Attaching screw: inch screw
External device
RD
SD
DSR
DTR
CTS
RTS
SG
FG