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Chapter 1. Introduction
Introduction
The IBM 4975 Printer Models 02L and 02R can be
used for various printing needs in data processing, data
collection, data entry, and communications systems.
The 4975 can be used as a system printer or a work
station printer.
Printer Description
This printer:
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•
•
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Is available in two models, with printing speeds of
80 characters per second (CPS). Model, charac-
ter density, and line length determine printing
speed
Forms characters using a series of dots contained
in an eight high dot matrix
Has vertical spacing of six or eight lines per inch
(lpi) , selected by the operator or by program
control, and special spacing of 2.6458 mm
(0.01042 in.) under program control
Has horizontal spacing of 10 or 15 characters per
inch (cpi), selected by the operator or by program
control.
IBM 4975 Printer
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Can use one to four part continuous forms
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Control unit (pcu) contains test routines for use
by the operator and maintenance personnel for
problem determination and for verifying repairs
Printing Specifications
Maximum print line width -
335.3 mm (13.2 in.)
Maximum print positions at 10 cpi -
132
Maximum print positions at 15 cpi -
198
Adjustable forms width -
76.2 to 450 mm (3.0 to
17.7 in.)
Forms length -
76.2 to 318 mm (3.0 to 12.5 in.)
Note: The minimum length, fold to fold, must be
152.4 mm (6.0 in.)
The maximum length for forms stacking is 318 mm
(12.5 in.) paper but, longer forms can be used at
the user's option.
The 4975 model 02L:
•
Is directly connected (without a modem, at a
distance of up to 4000 feet) to the attachment
card using the EIAI RS422 interface
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Communicates at 4800 bps.
The 4975 model 02R:
•
Can be connected with a modem (leased-line
only) or without a modem to the attachment card
using the EIA RS232C interface
Communicated at either 1200, 2400, or 4800 bps
(using external or internal clocking).
Introduction
1-1
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