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Xerox WORKCENTRE 7120 Panduan Referensi
1. GENERAL DESCRIPTION
INTRODUCTION
Xerox Models 7120/7121/7122/7140 Card Readers are
capable of reading standard 80-column tabulating cards
conforming to the Electronic Industries Association (EIA)
punched card standard RS-292.
Cards are read serially, column by column, in either of
two read modes: binary (absolute) or automatic (EBCDIC).
Automatic read mode switching, from EBCDIC to binary,
facilitates reading of intermixed EBCDIC- and binary-
punched cards.
The photoelectric read station reads each 12-bit column of
an 80-column card. The data thus sensed are presented to
the controlling system as a series of 8-bit bytes.
Transport check and read check facilities provide for detec-
tion of IInot operational
ll
conditions by the controlling sys-
tem. Empty input hopper and full output stacker conditions
are also signaled to the controlling system.
Table
1.
Characteristics
Operating Characteristics
Model 7120
Models 7121/7122
Model 7140
Readi ng speed
400 cards/minute
400 cards/mi nute (7122)
1500 cards/minute
200 cards/minute (7121)
Hopper capacity
1200 cards
1200 cards
2500 cards
Stacker capaci ty
1000 cards/stacker
1000 cards
2000 cards/stacker
Number of stackers
3
1
2
Physical Dimensions
Height
24 in.
17 in.
40 in.
Width
32 in.
21 in.
37.5 in.
Depth
25 in.
31.5 in.
33 in.
Weight (approximately)
450 Ib
200lb
350lb
Recommended access area
3 ft on all sides
3 ft on all sides
3 ft on all sides
Environmental Characteristics
Power Requirements
120 vac,
120 vac,
120 vac,
60 Hz, single-phase,
60 Hz, single-phase
60 Hz, single-phase,
2 amps
8 amps
16 amps
Operating temperature
60
0
F to 90
0
F
60
0
F to 90
0
F
60
0
F to 90
0
F
Operating humidity {relative}
25% to 80%
25% to 80%
25% to 80%
General Description