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IS4920, IS4921 Area Imaging Decode Engine Integration Guide.
Disclaimer Honeywell International Inc. (“HII”) reserves the right to make changes in specifications and oth er information contained in this document without prior notice, and the rea der should in all cases consult HII to determine whether any such changes have been made.
ii T able of Contents Introduction Product Overview ............................................................................................................... ............................... 1 Models and Accessories ..............................
iii Theory of Operation Overview ......................................................................................................................................................... 16 Host Interface Signals ......................................
iv Regulatory Compliance Safety .............................................................................................................................................................. 46 Europe...................................................
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1 Intr oduction Product Overview The IS4920 is a miniature area-imaging engine and decode board with image capturing and bar co de decoding capabilities. The engine module consists of a no n-decode imaging engine (IS4910), a decode board and two flex cables.
2 Models and Accessories Figure 1. Part Number Designations.
3 Components of the IS4920 / IS4921 Decode Engine IS4920-0 / IS4921-0 (Bracket Not Included) Item No. Description Item Location 1 IS4920-0 / IS4921-0 Assembled Decode Engine 2 IS4910 / IS4911 Non-Decode Engine* See pages 2, 4 and 6 for model specifications.
4 Components of the IS4910 / IS4911 Non-Decode Engine Item No. Description Item Location 1 Targeting 2 Area Illumination 3 Camera Imager 4 FirstFlash Aperture 5 Mounting Points (see pages 7 - 8) 6 Mounting Points Provided for Self-Tapping Screw (see pages 6 - 8) 7 Keying Location (see pages 6 - 8) 8 Printed Circuit Boards 9 22-Pin, 0.
5 Components of the Decode Printed Circuit Board TTL Level RS232 See page 10 for printed circuit board dimensions and conne ctor information. See page 39 and page 41 for connector pinout information. USB See page 10 for printed circuit board dimensions and conne ctor information.
6 Mounting Specifications IS4910-00 and IS4911-00 Non-Decode Engine Dimensions The -00 models include two Ø .075" [1.9 mm] blind holes for mounting the engine with self-tappin g screws. The mounting holes are located on the bottom of the unit with an additional keying loca tion point for engine alignment.
7 IS4910-01 / IS4911-01 Non-Decode Engine Dimensions The -01 models include two Ø .075" [1.9 mm] blind holes for mounting the engine with self-tappin g screws. Two additional Ø .098" ± .002 [2.5 mm ±.05 mm] clearance holes are provided as a secondary mounting option.
8 IS4910-02 / IS4911-02 Non-Decode Engine Dimensions The -02 models include two Ø .075" [1.9 mm] blind holes for mounting the engine with self-tappin g screws. Two additional M2 x .4 threaded inserts are provided as a secondary mounting option. The threaded inserts are located on tabs that extend from the sides of the engine's chassis.
9 Figure 10. IS4910-02 / IS4911-02 Dimensions.
10 Decode Printed Circui t Board Dimensions Both the TTL Level RS232 decode board and the USB decode board have two Ø 0.098" [2.489 mm] clearance holes for M2.2 mounting hardware. Always use safe ESD practices when handling and mounting the decode board.
11 IS4920-2 / IS4921-2 Bracketed Decode Engine Dimensions The bracketed decode engine includes two Ø 0.097" [2.464 mm] blind holes for mounting the en gine with self-tapping screws. Two additional M2 x .4 threaded inserts are provided as a secondary mounting option.
12 Enclosure Specifications The imaging engine was specifically designed for integration into custom housings for OEM applications. The imaging engine’s performance will be adversely a ffected or permanently damaged when mounted in an unsuitable enclosure.
13 Output Window Properties An improperly placed window has a serious potential to reduce the imaging engine’s performance. Careful consideration must be made when designing the out put window’s distance and angle relative to the imaging engine’s camera aperture.
14 Optical Clearance Specifications The window size and enclosure design must provide unobstructed cleara nce for the illumination and targeting areas shown below in figures 14 and 15 to avoid optical int erference that decreases the engine's performance.
15 System Considerations In order to ensure proper operation of the decode engine’s electrical system; care must be taken to ensure the following requirements are met. Power Supply* The decode engine is powered from the host device via the VI N and GND pins of the ZIF connector on the decode board.
16 Theor y of Operation Overview The IS4920 decode imaging engine series is ideal for integration into dat a terminals and other small devices. The high-quality images produced by the imaging engine can be used for decoding bar codes, image upload, signature capture, document lifting and reading OCR fonts.
17 Host Interface Signals The host interface signals are described in the table below. Pin# TTL RS232 USB Description 1 232INV NC Input: TTL RS232 polarity control with 32k ohm pull-up. Connect to ground for UART to UART signal polarity. Pull up to Vin for standard TTL RS232 polarity.
18 Since many host systems and applications have unique fo rmats and protocol requirements, the decode engin e supports a wide range of configurable features.
19 The nTrig signal not only wakes the engine up, but also immediately a ctivates and turns the engine into the Operating Mode. Either nWake or nTrig signals can be used to restart the TTL RS232 scanning engine when the engine is in Power-down Mode, which is indicated by the asserted (high) PWRDWN signal.
20 Power Mode Descriptions Boot Mode The engine is booting up. PWRDWN Pin State: Asserted (HIGH). Transition to Boot Mode: • The TTL RS232 engine is turned to Boot Mode from Power Down Mode when the power is applied AND upon reception of the nTrig or nWake signals.
21 Sleep Mode The engine is sleeping, but is fully powered. The CPU is in sleep mode. The image sensor is in standby mode, the wakeup from the Sleep Mode requires the image sensor reprogramming (which is done automatically in the engine software). PWRDWN Pin State: De-asserted (LOW).
22 Serial Configuration The IS4920 series can be configured by scanning configuration bar code s † or by serial commands sent from the host device. With serial configuration, each comm and sent to the engine is the ASCII representation of each numeral in the configuration bar code (see Figure 19).
23 Example 2: The following sample illustrates the serial command sequence for configuring the engine for the factory default settings, disabling Code 128 scanning, and ad ding a “G” as a configurable prefix. Commands for features that require sequences of multiple b ar codes for activation (i.
24 Operational T iming The following section describes the t iming associated with the various operating modes of the decode engine assembly including Power Up, Power Down, and Operating (from Idle or Sleep). The waveforms shown in this section assume VIN = 3.
25 The TTL version of the decode engine does not have an on b oard microcontroller to control the power to the decode platform and imaging engine. As such, the TTL version can only enter Boot Mode in response to signals from the host (nTrig or nWake).
26 Notes: In Figure 21 , the nGoodRead, nBeeper, and PWRDWN signals are high while in the Power Down Mode. The RTS Signal will be high in Power Down Mode regardless of the RTS polarity software configuration.
27 Decode Timing Engine image acquisition or decoding can occur from either the Idle Mode or the Sleep Mode. The process is initiated by asserting the nTrig signal (or serial command when in the Idle Mode). Once the trigger signal is received, the image sensor is reset and image acquisition begins.
28 Summary of Operation Timings Operation Timing Specifications Parameter Description Typical Relevant Note(s) Tprw_up Power Applied to Processor Ready Delay (USB) 6 seconds Notes 4 and 5 Tprw_up_ttl .
29 Depth of Field vs. Bar Code Element IS4920 Depth of Field* (In the Field of View) Bar Code Element Width Start (From Engine Face) End (From Engine Face) Total .127 mm 5 mil 50 mm (2.0") 145 mm (5.7") 95 mm (3.7") .254 mm 10 mil 30 mm (1.
30 IS4921 Depth of Field* in the Field of View Bar Code Element Width Start (From Engine Face) End (From Engine Face) Total .076 mm 3 mil 68 mm (2.7") 105 mm (4.1") 37 mm (1.4") .127 mm 5 mil 50 mm (2.0") 120 mm (4.7") 70 mm (2.
31 Exposure T ime f or Image Acquisition By default, the maximum exposure time for image acquisiti on is 8 ms. Reducing the exposure time for image acquisition may improve the reading performance of high-density bar codes for cert ain applications. Use the following bar codes to set the desired maximum exposure time.
32 Design Specifications Operational Light Source: Four, 650 nm Red Light Emitting Diode LED IS4920 25 mm – 310 mm (1.0" to 12.2") for 0.330 mm (13 mil) 1D Bar Codes See page 29 for additional information on engine depth of field. Depth of Field: IS4921 50 mm – 170 mm (2.
33 Mechanical Dimensions: See pages 6 - 8 for detailed specifications. Weight: < 14 g (.494 oz.) Termination: 12-Pin, Molex FFC/FPC Connector (Molex P/N 52559-1252) See page 38 for engine pinouts. See page 42 for flex cable specifications. Mounting: See pages 6 - 11 for detailed specifications.
34 Electrical Engine Input Voltage: 3.3VDC ~ 5.5VDC Typical Operating Current: 235 mA (continuous scan mode, VIN=3.3V) USB TTL Peak Operating Current: 400 mA (typical VIN=3.3V @ 25°C) 400 mA (typical VIN=3.3V @ 25°C) Idle Current: 160 mA (typical VIN=3.
35 DC Operating Voltages Signal Signal Description MIN MAX Condition VIN Operating Voltage 3V 5.5V VIH(1) Input High (RX, CTS) 2.5V VIL(1) Input Low (RX, CTS) .8V VIH(2) Input High (TTL_INV, nWake) .8xVIN VIL(2) Input Low (TTL_INV, nWake) .8V VIH(3) Input High (Trigger) .
36 Current Waveforms Figure 29 - Figure 31 show typical current signat ure for the decode engine (USB version) in various operating modes. Note: The next three waveforms are shown with VIN = 3.3V and the output signals nBeeper and nGoodRead are pulled high externally through 10K resistors.
37 Figure 31. Power Up / Boot Up Current Waveform.
38 Imaging Engine and Decode PCB T erminations Imaging Engine Interface Connector Figure 32. Imaging Engine Interface Connector Pin Signal Name Function 1 Aimer High enables Targeting LED (Input) 2 Il.
39 Decode Board (USB & TT L) Interface Connector Figure 33. Decode Board Interface Connector Pin Signal Name Function 1 GND Power and Signal Ground 2 Reserved Terminate with resistor, Pulled low, .
40 Decode Board (USB) Output to Host Connector Figure 34. Decode Board (USB) Output Connector Pin Signal Name Function 1 N/C No Connection 2 Vin Power: Supply voltage input (3V to 5.5V) 3 GND Ground: Power and signal ground. 4 D- Input: USB D- Signal 5 <reserved> Pin Function Reserved.
41 Decode Board (TTL) Output to Host Connector Figure 35. Decode Board (TTL) Output Connector Pin Signal Name Function 1 232INV Input: TTL RS232 polarity control with 32k ohm pull-up. 2 Vin Power: Supply voltage input (3V to 5.5V) 3 GND Ground: Power and signal ground.
42 Fle x Cab le Specifications Flex Cable Pinout – Imaging Engine Connection Figure 36. Flex Cable Pinout (Imaging Engine Connector End) Pin Signal Name Function 1 Aimer High enables Targeting LED (.
43 Flex Cable Pinout – Dec ode Board Connection Figure 37. Flex Cable Pinout (Decode Connector End) Pin Signal Name Function 1 GND Power and Signal Ground 2 Reserved Terminate with resistor, Pulled .
44 Dimensions Figure 38. Flex Cable Dimensions, P/N 77-77104 See installat ion warning on page 45..
45 Installation Notes Note 1. Warning! The flex cable must be installed in the orientation shown in Figure 39 and Figure 40. If the cable is incorrectly installed, the engine can be damaged, and the warranty voided, see pa ge 49. Figure 39. Flex Cable Orientation – Imaging Engine Figure 40.
46 Regulator y Compliance Safety The IS4920 Series area imaging engines are designed to meet the requirements of IEC Class 1 in accordance with IEC 60825-1:1993+A1+A2.
47 United States EMC All combinations of imaging engines and associat ed electronics will require testing to i nsure compliance with the following Federal Communications Commission regulation: 47 CFR Part 15 Note: When using the imaging engine with RF equipment, modem s, etc.
48 EMI The IS4920 consists of a 400MHz processor running a 100MHz SDRAM bus and a camera interface capable of image transfer up to 48MHz. The IS4920 series engine was designed t o meet EN55022 Radiated Class B emission limits. Using the system shown below, the decode e ngine was able to meet these requirements with an input voltage VIN = 3.
49 Limited W arranty Honeywell International Inc. ("HII") warrants its products and optional accessories to be free from defects in materials and workmanship and to conform to HII’s published specifications applicable to the products purchased at the time of shipment.
50 Pa t e n t s This Honeywell product may be covered by, but not limited to, one or more of the following U.S. Patents: U.S. Patent No.: 6,948,659; 6,953,152; 6,959,870; 6,962,289; 6,971,575; 6,971 ,.
51 Index A Aiming ............................................................ 16, 34 Ambient Light ....................................................... 16 Ambient Temperature .......................................... 15 Area Illumination ........
52 Plug.......................................................... 32, 37–41 Power................................................................... 15 Power Supply....................................................... 15 R Receptacle .............
53 Contact Inf ormation The A mericas (TA ) Germany Guangzhou Sales Office Tel: 86-20-388234 76 USA Tel: 49-89-89019-0 Fax: 86-20-38823477 Fax: 49-89-89019-2 00 Email: info@cn.metrologic.co m Tel: 800.436.3876 (Customer Serv ice) Email: info@de.metrologic.
54 Pr oduct Service and Repair North America Suzhou Sales Offi ce European Repair Center Tel: 800.436.3876 (Customer Service) Tel: 86-512-6762255 0 Tel: +34 913 751 249 866.460.8033 (Customer Support) F ax: 86-512-67 622560 Fax: +34 913 270 43 7 888.633.
Honeywell Scanning a nd Mobility 90 Coles Road Blackwood, NJ 08012-4683 00-05325 Rev F March 2009.
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