Epson LQ-2550 User Manual - Page 245
Interface Specifications, Parallel interface
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Storage condition: Temperature: Humidity: +64"F (+lB"C) to 72°F (+22"c) 40% to 60% Interface Specifications Your printer is equipped with both a parallel and a serial interface. For specifications for optional interfaces, see the manuals provided with the optional interfaces. Parallel interface The following tables describe the parallel interface. Pin assignments for the parallel interface Connector pin assignments and a description of their respective interface signals are shown in the following table. when data is logical 1 and LOW when it is BUSY Technical Specifications and that the printer is ready to accept more data. OUT A HIGH signal indicates that the printer cannot receive data. The signal goes HIGH in the following cases: 1) During data entry (ea. char. time) 2) During printing 3) When off line 4) During printer-error state. A-9