Epson TM-m50II - Page 113

113
Appendix
Functions of each connector pin
Pin no. Signal name Signal direction Function
2 RXD Input Reception data
3 TXD Output Transmission data
4 DTR Output When DTR/DSR control is selected, this signal indicates whether
the printer is BUSY.
• SPACE status
Indicates that the printer is ready to receive data.
• MARK status
Indicates that the printer is BUSY.
The conditions under which the printer becomes BUSY can be
set using the Epson TM Utility or the TM-m50II Utility.
When XON/XOFF control is selected, the signal indicates that the
printer is properly connected and ready to receive data from the
host.
The SPACE status indicates that the printer is connected properly
and can receive data from the host. It is always in the SPACE status
except in the following cases:
• During the period from when power is turned on to when the
printer is ready to receive data.
• During the self-test.
5SG - Signal ground
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.
7 RTS Output Same as the DTR signal