Printronix P9000 Series - Manual (Page 171)

7-1 Interfaces
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 Long Lines Adapter
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 Parallel Interface
n Centronics Parallel Interface
n Alternate Terminating Resistors
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 acĆ
cept the 50-pin Winchester MRAC50P connector is also available from your authorized servĆ
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 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.