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Communication
3255 4073–002 5–7
Parallel Interface
The parallel interface is an industry standard IEEE 1284 bi-directional interface.
It communicates in the following modes: compatibility, nibble, and byte.
The following sections explain the interface protocols and connectors for the
parallel interface. For information on the RS-232C interface protocols and
connectors, see “RS-232C Interface” earlier in this section.
Parallel Interface Connectors
This section describes the pin settings for the parallel connectors and interface
parameters. The parallel parameters are selected by setting the DIP switches on
the PC board. For more information, see “Setting Switches” later in this section.
The parallel parameters must match those of the host computer.
Parallel Communication Connector Pin Assignments
The following illustrations show the parallel communication connector and pin
assignments. The connector is designated as a IEEE 1284-A receptacle and is
commonly know as a D-subminiature 25 pin connector. It is located at the rear
of the printer.
Power Cable Connector Pin Assignments
The following illustration shows the power cable connector and pin
assignments. The power cable connector is a 6-pin mini-DIN plug which mates