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User's Guide
Interfaces C-1
Interfaces
This appendix describes the printer's parallel and serial interfaces,
including voltages, signals and timing, cables and connectors, pin assign-
ments, and parameters.
Centronics Parallel Interface
The parallel interface conforms to the Centronics standard for parallel
data transfer from computers to printers. The interface contains 36 lines.
Voltages
A signal on a line is either high or low, depending on the voltage level.
Timed high-to-low and low-to-high transitions of a signal enable the
transfer of logical information. The valid parallel voltages are as
follows:
99
99
9 High (+): +2.5 to +5 volts
99
99
9 Low (-): -0.2 to +0.8 volts
C
Appendix
User's Guide
Interfaces C-1
Interfaces
This appendix describes the printer's parallel and serial interfaces,
including voltages, signals and timing, cables and connectors, pin assign-
ments, and parameters.
Centronics Parallel Interface
The parallel interface conforms to the Centronics standard for parallel
data transfer from computers to printers. The interface contains 36 lines.
Voltages
A signal on a line is either high or low, depending on the voltage level.
Timed high-to-low and low-to-high transitions of a signal enable the
transfer of logical information. The valid parallel voltages are as
follows:
99
99
9 High (+): +2.5 to +5 volts
99
99
9 Low (-): -0.2 to +0.8 volts
C
Appendix