Epson EPL-N1200 User Manual - Page 122
Signal, RS-232C, Current, Direction, Description, when the pin level is LOW.
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Signal pin 17 20 23 24 25 RS-232C - DTR - - - Current loop TTY-TXD Direction OUT - OUT TTY-RXD - Return TTY-RXD - Return TTY-RXD IN Description Transmits data. This pin transmits serial data from the printer to the computer. Data terminal ready. This pin indicates whether or not the printer is ready to receive data. If the printer ready protocol is not selected, the printer is always ready to receive data (this pin is always HIGH). If the printer ready protocol is selected, the printer can accept data when the pin level is HIGH and cannot accept data when the pin level is LOW. When the DTR signal goes LOW, the host computer must stop sending data within 256 characters. This function can be set on or off with the default-setting mode of the printer. Received data. This pin transmits serial data from the computer to the printer. Transmits data. This pin transmits serial data from the printer to the computer. Received data. This pin transmits serial data from the computer to the printer. Specifications A-9
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