Serial Interface - Argox CP-2140 User Manual

Serial Interface

The RS232 connector on the printer side is a female, DB-9.
Pin
1 No function
Received Data,
2
RxD
Transmitted Data,
3
TxD
4 No function
5 GND
6 No function
Request to Send,
7
RTS
8 Clear to Send, CTS
9 +5V
Note :
Pin 9 are reserved for KDU (keyboard device unit), therefore
do not connect these pins if you are using a general host like
a PC.
Compact Printer Series - User‟s Manual
Signal
70
Description
Shorted to Pin - 6
Input. Serial "Received Data"
Output. Serial "Transmitted
Data".
No connection
Signal Ground
Shorted to Pin - 1
Output. Used as the control
signal for "H/W Flow Control "
Input. Used as the control
signal for "H/W Flow Control"
Output. Pin 9 is reserved for
KDU (keyboard device unit)