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● Serial interface
PinNo.
Signal
Name
Direction Function
1
GND
Chassis ground.
2
TXD OUT
Carries data from the printer.
3
RXD
IN
Carries data to the printer.
4
RTS OUT
On when the printer is ready to
receive data.
5-6
N/C Unused.
7
GND
Signal ground.
8-19
NIC
Unused.
20
DTR OUT
On when the printer is ready to
receive data.
~I--25
N/C
Unused.
113