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INTRODUCTION
The P9012 printer is equipped with resident parallel and serial interfaces. Only one in
terface can be enabled at a time via the control panel. An optional Dataproducts Long
Lines Adapter is available and replaces the Dataproducts and Centronics interface capa
bility. Other optional interfaces include an Intelligent Graphics Processor, PI-3287,
PI-5225, and PI-3203. Contact your authorized service representative for details.
This chapter describes:
Dataproducts Parallel Interface
Centronics Parallel Interface
Alternate Terminating Resistors
RS-232 Serial Interface
DATAPRODUCTS PARALLEL INTERFACE
This interface allows the printer to operate with controllers designed for Dataproducts
printers using a 50-pin AMP Ampilite HDH-20 connector. The interface is capable of
transferring 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. An optional Long
Lines Interface allows this distance to be extended to 500 feet. An adapter cable to accept
the 50-pin Winchester MRAC50P connector is also available from your authorized
service 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 de
fined 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 check 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 Request - 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.
P9012 Interfaces
CHAPTER 7
INTERFACES
7-1
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