Epson ActionPrinter 3000 User Manual - Page 98

Interface Specifications Signal Pin 11 12 13 14 15 16 17 18 19-30 31 32 33 34 Return Pin 29 Signal BUSY 30 PE - SLCT - AUTO FEED XT - NC - GND - CHASSIS GND - NC - GND - INIT - ERROR - GND - NC Direction OUT OUT OUT IN IN OUT - Description 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 HIGH signal indicates that the printer is out of paper. Pulled up to +5 V through 3.3 K resistance. When this signal is LOW, the paper is automatically fed 1 line after printing. (The signal level can be fixed to this by setting DIP switch 2-3 to ON.) Unused. Logic ground level. Printer's chassis ground, which is isolated from the logic ground. Unused. Twisted-pair return signal ground level. When this level becomes LOW, the printer controller is reset to its power-up state and the print buffer is cleared. This level is usually HIGH; its pulse width must be more than 50 microseconds at the receiving terminal. This level becomes LOW when the printer is: 1) in paper out state. 2) off line. 3) in error state. Same as for Pins 19-30. Unused. Technical Specifications 7-9