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6. Interface
This appendix provides detailed specifications for the printer's standard serial
interface.
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6.1 Pins and Signal Names
Pin
Signal
Direction
No.
Name
1
FG
—
2
TXD
OUT
3
RXD
IN
4
RTS
OUT
5
N.C.
6
DSR
IN
7
SG
8 -19
N.C.
Frame ground
Transmission data
Receive data
Same as DTR signal
Not connected
• DIP Switch 9 = OFF
In DTR/DSR communication mode when Memory Switch4-5 = 0, indicates whether data
receive from host is enabled or disabled.
Space: Receive enabled
Mark: Receive disabled
This signal is not checked in the X-ON/X-OFF communication mode.
• DIP Switch 9 = ON
This signal used for external reset. Printer is reset whenever signal is in mark state with
pulse width of 1mS or more.
Signal ground
Not connected
Function
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