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Serial Interface
Pih Name Function
1
GND
Printer’s chassis ground.
2 TXD This pin carries data from the printer.
3 RXD
This pin carries data to the printer.
4 RTS This pin is always set space.
This pin isSpace when thecomputer isready to
5 CTS send data.
This printer does not check this pin.
6 N/C
7
GND Signal ground.
8-10
N/C
This printer turn thispin Spacewhen itisready
11 RCH to receive data.
This line carries the same signal as pin 20.
12
N/C
13 GND Signal ground.
14-19 N/C
This printer turns this pin Space when it is
20 DTR
ready to receive data.
21-25 N/C
100