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Appendix D — Interfaces
76 EasyCoder PD41 Printer User’s Guide
RS-232 Serial Interface
Protocol
To change the Serial settings, see Chapter 5, “Configuring
Setup”.
Interface cable
The computer end of the cable depends on the computer model.
The printer end is a DB-9pin plug, as shown below.
RS-232 DB9-pins
Default Setup
Baud rate 9600
Character length 8 bits
Parity None
Stop bits 1
Handshaking XON/XOFF and RTS/CTS
Signals on the printer’s serial port:
DB-9 Signal Meaning
1 External +5V DC Max 500mA
2 TXD Transmit data
3 RXD Receive data
4
5 GND Ground
6
7 CTS Clear to send
8RTSRequest to send
9
1
23
45
6
78
9