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Industrial Digital Bar Code Slot
Reader
Technical Data
Features
•Multi Resolution
Compatible with virtually all bar code resolutions
•Large Slot Width
Allows reading thickly laminated cards
•Sealed Metal Case (IP 66/67)
Can be installed outdoors or in wet environments
•Tamper Proof Design
Ideal for security applications
•Minimal First Bar Distortion
•880 nm Light
•Wide Operating Temperature
Range
-40°C to +70°C
•Wide Scan Speed Range
•Black Textured Epoxy Finish
•Digital Output
Open collector output compatible with TTL and CMOS logic
•Single +5 Volt Supply
Description
Hewlett-Packard’s Industrial Digital Slot Reader is designed to provide excellent scanning performance on a wide variety of bar coded cards and badges. It contains a unique optical/ electrical system that integrates over a large vertical area of the bar/space pattern, providing a
greatly improved first read rate even on poorly printed bar codes.
The HBCS-7100 Series uses an infrared (880 nm) light with 0.19 mm (0.0075 in.) resolution.
The extra large depth of field allows the slot reader to have a slot width of 3.2 mm (0.125 in.), thus making it possible to read even thickly laminated cards and badges. When used as a stand alone optics module, the maximum depth of field is dependent upon resolution.
The optics and electronics are housed in a rugged metal case. The case is fully gasketed and sealed, making it suitable for use in outdoor or wet environments. The black epoxy coating adds a durable, finished look to the Digital Slot Reader. When installed using the rear screw holes, the units become tamper proof, making an excellent choice for security access control.
The optical system is centered in the slot track, allowing the user to easily scan from either direction. The wide slot width makes it easy to insert and slide the cards. The optical system is covered with a
HBCS-7100 Series
recessed window to prevent contamination and reduce the wear on the cards.
The standard slot reader comes with the optics module mounted on a base plate with an opposite rail and 122 cm (48 in.) straight cord. Two standard connectors are available: a male 5 pin, 240°, locking DIN (HBCS-7100); or a female, 9 pin D-sub squeeze to release, (HBCS-7108).
The optics module (HBCS-7150) is available which can be integrated into other equipment or used as a stand alone sensor assembly.
Applications
The digital bar code slot reader is a highly effective alternative to
5965-3007E |
4-75 |
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 recognition. When compared to magnetic stripe encoding, bar code offers significant advantages in flexibility 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 precision optical system, an analog amplifier, a digitizing circuit, and an output transistor. These elements provide a TTL compatible 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 provides 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 HBCS7150 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, precautions 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 operating 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.
(INCHES) |
8.0 |
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(0.32) |
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7.0 |
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(0.23) |
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mm– |
6.0 |
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(0.24) |
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5.0 |
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DISTANCE |
(0.20) |
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OPERATING |
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(0.12) |
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TYPICAL |
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4.0 |
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REGION |
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(0.16) |
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OPERATING |
3.0 |
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2.0 |
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GUARANTEED |
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(0.08) |
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OPERATING |
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1.0 |
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REGION |
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(0.04) |
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0.05 |
0.10 |
0.15 |
0.20 |
0.25 |
0.30 |
0.35 |
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(0.002)(0.004) (0.006) (0.008) (0.010)(0.012)(0.014)
MINIMUM SYMBOL RESOLUTION – mm (INCHES)
Figure 1.
4-76
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