Hitachi UX Twin Nozzle Service Manual page 117

[Specification of RS-232C external communication connector]
- Signal specification of the external communication connector(RS-232C) on EZJ129 board is shown in
the table below.
-Signals used: RD, SD, DTR, SG, DSR, RTS and CTS
-Signal specification ( 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 (pin side)
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 15m
3-41
Remarks
No connection
Ground
No connection
Fixing screw: Inch screw
External device
RD
SD
DSR
DTR
CTS
RTS
SG
FG