Printronix P9000 Series manual Chapter Interfaces, Dataproducts Parallel Interface

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:

nDataproducts Parallel Interface

nCentronics Parallel Interface

nAlternate Terminating Resistors

nRS-232 Serial Interface

Dataproducts Parallel Interface

This interface allows the printer to operate with controllers designed for Dataproducts printF ers using a 50-pin AMP Ampilite HDH-20 connector. The interface is capable of transferF 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 acF cept the 50-pin Winchester MRAC50P connector is also available from your authorized servF 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.

Interfaces 7-1