Epson EPL-7500 Product Information Guide - Page 4

EPL-7500 LASER PRINTER Interface Specifications RS232 Serial interface Parallel interface CAUTION: The EPL-7500 is factory-set for the parallel interface. To use another interface, you must change the connect the interface cable. See Chapter 3 for instructions on changing SelecType settings. The printer has the following resident interfaces: l Parallel . RS-232/RS-422 serial . AppleTalk Parallel interface Your printer is equipped with an 8-bit parallel interface. Signal level: TTL compatible Serial interface The printer's resident serial interface can be set for either RS-232 or RS-422 operation. These interfaces have the following characteristics. Data format Word length: 7 or 8 bits Parity: Space or none, odd or even, mark or none Stop bits: 1 or 2 Printer ready protocol: enabled (DTR and XON/XOFF protocol set to ON.) The data format can be set using functions and menu items in SelecType. Baud rate RS-232: 300, 600. 1200, 2400, 4800. 9600, 19,200, 38,400 bits per second. RS-422: 300, 600, 1200, 2400, 4800, 9600, 19,200, 38,400, 57,600 bits per second. Signal level RS-232: Conforms to EIA RS-422: Conforms to EIA Handshaking The printer's serial interface can use DTR (Data Terminal Ready) signal levels and XON/XOFF communication protocols either separately or in combination. When the vacant area for data in the input buffer drops to 128 bytes, the printer outputs an XOFF code or sets the DTR signal level to low (MARK, indicating that it cannot receive any more data). Once the vacant area for data in the buffer recovers to 256 bytes, the printer outputs an XON code or sets the DTR flag to high (SPACE), indicating that it is again ready to receive data. Connector D-sub 25-pin connector DIN S-pin connector There are four ways that the printer can be initialized (returned to a fixed set of conditions). in SelecType Level 2 is executed. . Software sends the printer-initialize The following tables list the default conditions that become valid when the printer is initialized. The default conditions differ according to the printer mode. Default settings in HP emulation mode CR=CR. LF=LF. FF=FF CR=CR, LF=LF. FF=FF Font ID 0 io Character 0 0 code I EPL-7500-4 1/7/91 Laser Printers