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Appendix
Functions of each connector pin
Parity check Select one of the following with DIP switch 1-5:
Yes No
Parity selection Select one of the following with DIP switch 1-6:
Even Odd
Stop bit 1 or more bits
However, the stop bit for data transfer from the printer is fixed to 1 bit.
Connector Printer side DSUB 25-pin (female) connector
Pin no. Signal name Signal direction Function
1FG — Frame ground
2 TXD Output Transmission data
3 RXD Input Reception data
4 RTS Output Equivalent to DTR signal (pin 20)
6 DSR Input This signal indicates whether the host computer can receive
data.
SPACE indicates that the host computer can receive data.
MARK indicates that the host computer cannot receive data.
When DTR/DSR control is selected, the printer transmits data
after confirming this signal (except if transmitted using some
ESC/POS commands).
When XON/XOFF control is selected, the printer does not
check this signal.
Changing DIP switch 2-7 lets this signal be used as a printer
reset signal.
When you use this signal as the printer’s reset signal, the
printer is reset when the signal remains MARK for a pulse
width of 1 ms or more.
7 SG — Signal ground
Item Specifications
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