Appendix 4 Communication Interface; Appendix 4.1 Serial Interface - Newland NLS-LP410 User Manual

Appendix 4 Communication interface

Appendix 4.1 Serial interface

Interface signal
1)
Wiring diagram
2)
Caution:
 The following connection method can be used, which only needs 3 wires. This method applies
to small data amount or XON/XOFF flow control:
Pin Signal name
1 None
2 RXD
3 TXD
4 DTR
5 SG
6 DSR
7 RTS
8 CTS
9 FG
Table appendix 4.1.1 printer signal and status
PC Printer
TXD---------------RXD
RXD---------------TXD
CTS----------------RTS
RTS----------------CTS
SG -----------------SG
PC Printer
TXD---------------RXD
RXD---------------TXD
SG ----------------SG
Signal direction
Input
Output
Output Data terminal ready
－
Input Data device ready
Output Request transmission
Input Allow transmission
Frame ground
－
Function
Data input
Data output
Signal ground
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