Epson DM-D500 Technical Reference Guide - Page 67
Connector for printer connection
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Connector for printer connection This is the connector for connecting to a printer. Appendix A Hardware Pin assignments Pin Number Signal Name 2 RXD 3 TXD 4 DTR 5 GND 6 DSR 9 RESET Signal Direction Signal Function Input Data received from the printer (Printer -> host) Output Data sent to the printer (Display -> printer) Output Indicates whether or not the host is ready to receive data. [SPACE] The host is ready to receive data [MARK] The host is not ready to receive data - Signal GND Input Indicates whether the display is ready to receive data from the printer [SPACE] The printer is ready to receive data Send once data is ready [MARK] The printer is not ready to receive data Do not send even when data is ready Output Reset signal for the printer (Host -> printer) 67
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