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7-1Interfaces
CHAPTER 7
INTERFACES
Introduction
The P9012 printer is equipped with resident parallel and serial interfaces. Only one interface
can
be enabled at a time via the control panel. An optional Dataproducts L
ong Lines A
dapter
is
available and replaces the Dataproducts and Centronics interface capability. Other optional
interfaces include an Intelligent Graphics Processor, PI-3287, and PI-5225. Contact your
authorized
service representative for details.
This chapter describes:
n
Dataproducts P
arallel Interface
n
Centronics P
arallel Interface
n
Alternate T
erminating R
esistors
n
RS-232 Serial Interface
Dataproducts Parallel Interface
This interface allows the printer to operate with controllers designed for Dataproducts printĆ
ers using a 50-pin AMP Ampilite HDH-20 connector. The interface is capable of transferĆ
ring up to 500,000 characters per second. The maximum data line length (cable length) from
the controller (host computer) to the printer is 40 feet (12 meters). An optional Long Lines
Interface
allows this distance to be extended to 500 feet (150 meters). An adapter cable to ac
Ć
cept
the 50-pin W
inchester MR
A
C50P connector is also available from
your authorized serv
Ć
ice
representative.
Dataproducts Interface Signals
Table 7-1 and Table 7-2 list the Dataproducts interface connector pin assignments.
Dataproducts compatible interface signals between the computer and the printer are defined
as follows.
Ready Line - A high true signal from the printer indicating AC power and DC voltages are
present,
paper is loaded properly, and the printer is not in a fault condition.
On Line - A high true signal from the printer indicating the Ready Line is true and the ON
LINE
switch on the control panel
has been activated. The printer is ready to accept data from
the host.
Data
R
equest
- A high true signal from the printer to synchronize host data transmission
with
printer
timing. This
signal goes true when the printer is ready to receive data. It changes to the
false
state shortly after the leading edge of the data strobe signal.