Interface specifications, Serial – Argox R Series User Manual
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Interface Specifications
This appendix presents the interface specifications of I/O ports 
for the printer. These specifications include pin assignments, 
protocols and detailed information about how to properly 
interface your printer with your host or terminal. 
 
Serial
 
The RS232 connector on the printer side is a female, DB-9. 
 
 
 
 
Pin
Signal
Description
1
No function
Shorted to Pin - 6
2
Received Data, 
RxD 
Input. Serial “Received Data”
3
Transmitted Data, 
TxD 
Output. Serial “Transmitted 
Data”. 
4
No function
No connection
5
GND
Signal Ground
6
No function
Shorted to Pin - 1
7
Request to Send, 
RTS 
Output. Used as the control 
signal for “H/W Flow Control “ 
8
Clear to Send, CTS
Input. Used as the control 
signal for “H/W Flow Control” 
9
+5V
Output. Pin 9 is reserved for 
KDU (keyboard device unit) 
Note: 
Pin 9 is reserved for KDU (keyboard device unit) only; therefore 
