Chapter 1: Installation and wiring 
24  P/N 3102351-EN • REV 005 • ISS 28DEC18 
Figure 31: Printer wiring 
 
2)  DB-25 serial port on back of printer 
(5)  To RS-232 card  
 
Figure 32: DB-25 pin connections 
 
2)  Pin 2: TXD (red wire) 
  Pin 3: RXD (white wire) 
(4)  Pin 7: COM (black wire) 
(6)  Pin 20: DTR (green wire) 
(7)  DB-25 male (front view) 
 
Table 6: SA-232 card to printer DB-25 connections 
-232 card  DB-25  Description 
  COM (pin 7)  Black wire (ground connection) 
  DTR (pin 20)  Green wire (printer supervision) 
  RXD (pin 3)  White wire (communication) 
  TXD (pin 2)  Red wire (communication) 
Computer download wiring 
To install wiring to a computer: 
1.  If you have a connected printer, disconnect it. 
2.  Locate a serial port (COM port) on the back of the computer. 
Note: A USB to DB-9 converter may be required, as most computers no longer include 
serial ports. 
3.  Connect the DB-9 end of the RS-232 cable to the COM port on the back of the computer. 
4.  Connect the other end of the RS-232 cable to the SA-232 card.