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Serial Interface
Name
Pin
Function
1 GND
Printer’s chassis ground.
2
TXD This pin carries data from the printer.
This pin carries data to the printer.
This pin is always set space.
This pin isSpace when thecomputer isready to
send data.
This printer does not check this pin.
3
RXD
4 RTS
5
CTS
6
N/C
7 GND Signal ground.
8-10
N/C
This printer turnthis pin Space when itisready
to receive data.
This line carries the same signal aspin
20.
RCH11
12
N/C
GND
Signal ground.
14-19
N/C
This printer turns this pin Space when it is
ready to receive data.
20 DTR
21-25
N/C
148