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HBCS-7100 Datasheet(PDF) 2 Page - Agilent(Hewlett-Packard)

Part No. HBCS-7100
Description  Industrial Digital Bar Code Slot Reader
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Maker  HP [Agilent(Hewlett-Packard)]
Homepage  http://www.home.agilent.com
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HBCS-7100 Datasheet(HTML) 2 Page - Agilent(Hewlett-Packard)

   
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4-76
keyboard data entry. Bar code
scanning is faster and more
accurate than key entry and
provides far greater throughput.
In addition, bar code scanning
typically has a higher first read
rate and greater data accuracy
than optical character recogni-
tion. When compared to magnetic
stripe encoding, bar code offers
significant advantages in flexibil-
ity of media, symbol placement
and immunity to electromagnetic
fields.
Hewlett-Packard’s Industrial
Digital Slot Reader is designed for
applications where high first read
rate and durability are important
factors. The epoxy coated metal
case with its tamper proof
mounting system, makes these
slot readers ideal choices for
security access control, time and
attendance recording and other
bar coded badge and card reading
applications.
Electrical Operation
The HBCS-71XX family of digital
slot readers consists of a pre-
cision optical system, an analog
amplifier, a digitizing circuit, and
an output transistor. These
elements provide a TTL compat-
ible output from a single 4.5 V to
5.5 V DC power supply. The open
collector transistor requires a
pull-up resistor for proper
operation.
A non-reflecting black bar results
in a logic high (1) level output,
while a reflecting white space will
cause a logic low (0) level output.
After power up, the slot reader
will be fully operational after
approximately 6 seconds. During
operation, the slot reader will
assume a logic low state after a
short period (typically 1 second)
if no bar code is scanned. This
feature allows multiple scanners
(slot readers and wands) to be
connected together with a simple
OR gate.
The slot reader connector pro-
vides a shield which is connected
to signal ground. The shield is
connected either to the metal
housing of the 5 pin DIN
connector, or to pin 8 of the 9 pin
D-sub connector. A good
connection to earth ground is
recommended.
The maximum recommended
cable length is 7.6 m (25 ft.).
WARNING:
OBSERVING THE INFRARED
LIGHT SOURCE IN THE HBCS-
7150 AT CLOSE DISTANCES
FOR PROLONGED PERIODS OF
TIME MAY CAUSE INJURY TO
THE EYE. When mounted with
the rail in place, the infrared
output flux is radiologically safe.
With the rail removed, precau-
tions should be taken to avoid
prolonged visual observation.
Mounting Considerations
Slot Reader
The slot reader (HBCS-7100/
7108) is designed to be virtually
tamper proof when mounted
using the two rear mounting
holes. In this case, the cable must
be routed from the rear of the slot
reader through the mounting
surface (wall, door, etc.).
When mounting the slot reader,
the cable may be routed through
the mounting surface (see above),
or it may be routed along grooves
in the base and exit the side of the
slot reader at any of four points.
This allows flexibility in the
mounting orientation.
Optics Module
The optics/electronics module
(HBCS-7150) is designed for
applications which require a
different slot width, integration
into a larger housing, or a fixed
beam stationary scanner. When
using the optics module, the
operating distance from the front
surface of the module to the
symbol will vary depending on the
symbol resolution. Figure 1 shows
the relationship between operat-
ing range and minimum symbol
resolution for a typical optics
module.
This relationship was applied in
the design of the slot reader,
where a slot width of 3.2 mm
(0.125 in.) insures excellent
performance reading bar code
symbols which have a nominal
resolution of 0.19 mm (0.0075
in.) and include normal printing
errors.
Figure 1.
0.05
(0.002)
8.0
(0.32)
MINIMUM SYMBOL RESOLUTION – mm (INCHES)
0.35
(0.014)
7.0
(0.23)
6.0
(0.24)
4.0
(0.16)
1.0
(0.04)
0.15
(0.006)
0.25
(0.010)
2.0
(0.08)
5.0
(0.20)
3.0
(0.12)
0.10
(0.004)
0.20
(0.008)
0.30
(0.012)
GUARANTEED
OPERATING
REGION
OPERATING
TYPICAL
REGION


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