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