The industry standard parallel printer connector (often referred to as a Centronix interface) is a 36 position, female, Champ connector. This table shows the common definition of most pins on the industry standard parallel printer connector.
Pin Description Direction --------------------------------------------------------------- 1 Data Strobe, DST\ to printer 2 D0 to printer 3 D1 to printer 4 D2 to printer 5 D3 to printer 6 D4 to printer 7 D5 to printer 8 D6 to printer 9 D7 to printer 10 Acknowledge, ACK\ from printer 11 Busy, BSY from printer 12 Paper Empty, PE from printer 13 Selected, SEL from printer 14 * 15 * 16 Signal ground, SG n/a 17 Chassis ground, CG n/a 18 +5 volts from printer 19-30 Ground n/a 31 Printer reset, PI\ to printer 32 Error, ERR\ from printer 33 Ground n/a 34-36 * * Nonstandard definition for these pins.