Epson ActionLaser 1500 User Manual - Page 171

I I Signal Return Signal Pin Pin 31 32 - ERROR I I Direction Description When this signal goes LOW, the printer controller ignores the STROBE signal. OUT This level goes LOW when the printer is: 0 out of paper 0 in error state 0 off line 33 - 34 35 36 - +5V - SLCTIN IN Same as for Pins 19 - 30. Not used. Pulled up to +5V through 3.3 Kohm resistance. The DC 1/DC3 control codes are valid only when this signal is HIGH (SLCTIN set to OFF). This setting can be changed with SelecType. Note: Cl All interface conditions are based on TTL level. Both the rise and fall of each signal must be less than 0.2 microseconds. 0 Data transfer must be carried out by observing the ACKNLG or BUSY signal. (Data transfer to this printer can be carried out only after the receipt of the ACKNLG signal or when the level of the BUSY signal is LOW.) 0 The column heading 'Direction' refers to the direction of signal flow as viewed from the printer. 0 'Return' denotes the twisted-pair return to be connected at signal ground level. For the interface wiring, be sure to use a twisted-pair cable for each signal and to complete the connection on the return side. 0 The ACKNLG pulse width varies or is permanently set to HIGH, depending on the setting of the BUSY DELAY option in SelecType Level 2. Technical Specifications A-11