Tysso PRP-300 - RS-232 Pin Assignment

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2. RS-232 Pin Assignment
Pin
Signal
Description
1
N.C.
2
TXD
XON/XOF Handshake
(Control codes transmission).
3
RXD
Data transmission (the printer
receives data from the HOST)
4
N.C.
5
GND
Ground
6
DTR
Printer Status
7
N.C.
8
RTS.
Printer Status
9
N.C.
6
5
9
1