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C-6
+5V DC (Pin 18)
This line is connected to the printer’s +5V DC line (+5V ±0.5V, 250 mA [Serial and Parallel total]
maximum, fused).
Prime [nInit] (Pin 31)
This signal is used in the standard Centronics interface to enable the computer to reset the printer.
It is ignored by the printer.
Error* [nFault] (Pin 32)
When the high-speed parallel line control is on (FRPO O2=2), this line returns error status.
Auxiliary output 1 (Pin 33)
This signal line is not used.
Power Ready (Pin 35)
This signal is high when the printer’s power is on.
Select In [NSelectIn] (Pin 36)
This signal is used in some versions of the Centronics interface to enable the computer to force the
printer on-line. In high-speed mode, it is used as an interrupt.
C.1. Parallel Interface