Appendix C — Interfaces
154 EasyCoder PX4i Bar Code Label Printer User’s Guide (Fingerprint Version)
RS-232 Interface
Protocol For The Default Setup
Baud rate: 9600
Character length: 8 bits
Parity: None
Stop bits: 1
RTS/CTS: Disabled
ENQ/ACK: Disabled
XON/XOFF: Disabled (both ways)
New Line: CR/LF
To change the interface settings, see “Setting Up the Printer” on
page 59.
SIgnals On Printer’s Serial Port “uart1:”
DB-9 Signal Meaning
1 External +5V DC*
2 TXD Transmit data
3 RXD Receive data
4 DSR Data set ready
5GNDGround
6 DTR Data terminal ready
7CTSClear to send
8 RTS Request to send
9---Not Used
* The external +5 V is limited to 500 mA and is automatically switched
off at overload.
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