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● Serialinterface
PinNo.
Signal
Name
Direction Function
1
GND — Chassisground.
2 TXD
OUT Carriesdatafromtheprinter.
3 RXD
IN Carriesdatato theprinter.
4 RTS
OUT Onwhentheprinteris readyto
reeeivedata.
5-6
N/C
Unused.
7 GND —
Signalground.
8-19 N/C
Unused.
20 DTR
OUT Onwhentheprinteris readyto
receivedata.
21-25 N/C
Unuswl.
110