Documax 5380 User’s Manual
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B.4.4 Serial Interface
RS-232 serial interface’s working way is set by the toggle switch on the main board. Interface
connector is DB-25 hole-type connector. Its connector pin numbers are as follow figure shown:
The connection figure of printer and computer
The connection figure of printer and computer as B-7 shown:
Pin Description
RS-232 serial pin description is shown as table B-2:
Table B-2 RS-232 serial pin description
Pin
Signal Name
Direction
1
FG Frame Ground
2 TXD
Transmit
Data
OUT
3
RXD Receive Data
IN
4
RTS Request to Send
OUT
5
CTS Clear to send
IN
6
DSR Data set ready
IN
7 GND
Ground
8
DCD Data carrier Detect
IN
……
20
DTR Data terminal ready
OUT
……
Signal description
The practically used pin number:
Input signal: RXD and DSR
Output signal: TXD and DTR
Signal description
Figure B-6 connector pin numbers
Figure B-7 The connection of printer and host
DTR
GND
TXD
RXD
DSR
DCD
CTS
GND
RXD
TXD
Printer 25 PIN connector
HOST 9 PIN connector