Metrologic Instruments Scanner IS4920 User Manual
IS4920, IS4921  
Area Imaging Decode Engine  
Integration Guide  
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Table of Contents  
Introduction  
Product Overview..............................................................................................................................................1  
Models and Accessories ...................................................................................................................................2  
Components of the IS4920 / IS4921 Decode Engine  
IS4920-0 / IS4921-0 (Bracket Not Included) ..................................................................................................3  
IS4920-1 / IS4921-1 (Bracket Included).........................................................................................................3  
Components of the IS4910 / IS4911 (Non-Decode Engine)..............................................................................4  
Components of the Decode Printed Circuit Board  
TTL Level RS232 ...........................................................................................................................................5  
USB................................................................................................................................................................5  
Labels................................................................................................................................................................5  
Mounting Specifications  
IS4910-00 / IS4911-00 Non-Decode Engine Dimensions .................................................................................6  
IS4910-01 / IS4911-01 Non-Decode Engine Dimensions .................................................................................7  
IS4910-02 / IS4911-02 Non-Decode Engine Dimensions .................................................................................8  
Decode Printed Circuit Board Dimensions  
TTL Level RS232 .........................................................................................................................................10  
USB..............................................................................................................................................................10  
IS4920-2 / IS4921-2 Bracketed Decode Engine Dimensions..........................................................................11  
Enclosure Specifications  
Electrostatic Discharge (ESD) Cautions ......................................................................................................12  
Airborne Contaminants and Foreign Materials.............................................................................................12  
Output Window Properties ...........................................................................................................................13  
Output Window Coatings .............................................................................................................................13  
Optical Clearance Specifications .................................................................................................................14  
System Considerations  
Power Supply ..................................................................................................................................................15  
Host Flex Cable...............................................................................................................................................15  
Power Sequencing ..........................................................................................................................................15  
Thermal Considerations ..................................................................................................................................15  
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Theory of Operation  
Overview .........................................................................................................................................................16  
Host Interface Signals .....................................................................................................................................17  
Usage of Host Interface Signals......................................................................................................................18  
Power Mode Descriptions ...............................................................................................................................20  
Serial Configurations .......................................................................................................................................22  
Abbreviated ASCII Table.................................................................................................................................23  
Operational Timing  
Power Up/Boot Up...........................................................................................................................................24  
Power Down/Suspend/Power Removed .........................................................................................................26  
Decode Timing ................................................................................................................................................27  
Summary of Operation Timings.......................................................................................................................28  
Depth of Field vs Bar Code Element  
IS4910.............................................................................................................................................................29  
IS4911.............................................................................................................................................................30  
Exposure Time for Image Acquisition ............................................................................................................31  
Design Specifications  
Operational......................................................................................................................................................32  
Mechanical ......................................................................................................................................................33  
Environmental .................................................................................................................................................33  
Electrical..........................................................................................................................................................34  
Detailed Electrical Specifications.....................................................................................................................34  
Current Waveforms .........................................................................................................................................36  
Imaging Engine and Decode PCB Terminations  
Imaging Engine Interface Connector...............................................................................................................38  
Decode Board (USB & TTL) Interface Connector ...........................................................................................39  
Decode Board (USB) Output to Host Connector.............................................................................................40  
Decode Board (TTL) Output to Host Connector..............................................................................................41  
Flex Cable Specifications  
Flex Cable Pinout – Imaging Engine Connection............................................................................................42  
Flex Cable Pinout – Decode Board Connection..............................................................................................43  
Dimensions......................................................................................................................................................44  
Installation Notes.............................................................................................................................................45  
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Regulatory Compliance  
Safety ..............................................................................................................................................................46  
Europe..........................................................................................................................................................46  
United States................................................................................................................................................47  
Canada.........................................................................................................................................................47  
EMI..................................................................................................................................................................48  
Limited Warranty ..............................................................................................................................................49  
Patents...............................................................................................................................................................50  
Index ..................................................................................................................................................................51  
Contact Information..........................................................................................................................................53  
Product Service and Repair.............................................................................................................................54  
iv  
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Introduction  
Product Overview  
The IS4920 is a miniature area-imaging engine and decode board with image capturing and bar code decoding  
capabilities. The engine module consists of a non-decode imaging engine (IS4910), a decode board and two  
flex cables. The IS4920 features a mega-pixel CMOS sensor, integrated illumination, and patented  
FirstFlash® technology; together they ensure capturing a high-resolution image with optimal brightness each  
time. IS4920 also has a wide-angle lens design, which covers a large scan area and delivers a true omni-  
directional scanning performance. 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.  
The decode board is powered by a fast processor and SwiftDecoder™ software to decode a wide array of 1D  
and 2D bar codes plus OCR fonts. The decode board supports TTL level RS232 or USB 1.1 communication.  
The decode board is compatible with MetroSet2, a PC-based software for easy configuration.  
IS4920 is designed with the industrial standard size, mounting options and output to facilitate integration into  
existing applications. The imaging engine’s miniature size makes IS4920 ideal for integration into data  
terminals and other small devices. IS4920 is supplied as an assembled module with a mounting bracket or as  
separate components for custom mounting. The imaging engine’s unique open system architecture allows  
IS4920 to accept third party and custom plug-ins, giving the IS4920 virtually unlimited application flexibility.  
The small yet powerful engine delivers a scanning performance that rivals a full-fledged handheld scanner.  
A high-density version, IS4921, is also available.  
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Models and Accessories  
Figure 1. Part Number Designations  
2
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Components of the IS4920 / IS4921 Decode Engine  
IS4920-0 / IS4921-0 (Bracket Not Included)  
Item No.  
Description  
Item Location  
IS4920-0 / IS4921-0  
Assembled Decode Engine  
1
IS4910 / IS4911 Non-Decode Engine*  
See pages 2, 4 and 6 for model  
specifications.  
2
3
4
Decode Board*  
USB (See page 10)  
TTL Level RS232 (See page 10)  
Flex Cable  
P/N 77-77104  
Figure 2. IS4920-0 / IS4921-0 *  
IS4920-1 / IS4921-1 (Bracket Included)  
Item No.  
Description  
Item Location  
IS4920-1 / IS4921-1  
Assembled Decode Engine  
1
IS4910 / IS4911 Non-Decode Engine*  
See pages 2, 4 and 6 for model  
specifications.  
2
3
4
5
Bracket  
Decode Board*  
USB, (See page 10)  
TTL Level RS232 (See page 10)  
Flex Cable  
P/N 77-77104  
Figure 3. IS4920-1 / IS4921-1 *  
* Figures show the IS4910-01 Non-Decode Engine with a USB Decode PCB.  
3
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Components of the IS4910 / IS4911 Non-Decode Engine  
Item No.  
Description  
Item Location  
1
Targeting  
2
3
4
5
6
7
8
Area Illumination  
Camera Imager  
FirstFlash Aperture  
Figure 4. IS4910-00 / IS4911-00  
Mounting Points (see pages 7 - 8)  
Mounting Points Provided for  
Self-Tapping Screw (see pages 6 - 8)  
Keying Location (see pages 6 - 8)  
Printed Circuit Boards  
22-Pin, 0.50 mm (.020") Pitch  
SlimStack™ Plug, Molex  
(P/N 55560-0227)  
9
Figure 5. IS4910-01 / IS4910-02  
IS4911-01 / IS4911-02  
Molex and SlimStack are trademarks or registered trademarks of Molex, Inc.  
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Components of the Decode Printed Circuit Board  
TTL Level RS232  
See page 10 for printed circuit board dimensions and connector information.  
See page 39 and page 41 for connector pinout information.  
USB  
See page 10 for printed circuit board dimensions and connector information.  
See page 39 and page 40 for connector pinout information.  
Labels  
The serial number/model number label is located on the side of the engine.  
Figure 6. Serial Number Label Sample  
Figure 7. Decode Board (USB Version Shown) Serial Number Label Sample  
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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-tapping screws.  
The mounting holes are located on the bottom of the unit with an additional keying location point for engine  
alignment.  
Warning: The limited warranty (on page 49) is void if the following guidelines are not adhered to when  
mounting the engine.  
When securing the engine with screws:  
•
•
•
•
Use M2.2 x 4.5 Philips pan head, type AB, steel, zinc clear, Trivalent self-tapping screws.  
Do not exceed 1.75 +0.5 in-lb [2.02 +6 cm-kg] of torque during screw installation.  
Use a minimum mount thickness of 0.3 mm.  
Use safe ESD practices when handling and mounting the engine.  
Figure 8. IS4910-00 / IS4911-00 Dimensions  
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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-tapping screws.  
Two additional Ø .098" .002 [2.5 mm .05 mm] clearance holes are provided as a secondary mounting  
option. The clearance holes are located on tabs that extend from the sides of the engine's chassis.  
A keying location point is provided on the bottom of the engine to assist with alignment.  
Warning: The limited warranty (on page 49) is void if the following recommendations are not adhered to when  
mounting the engine.  
When securing the engine with self-tapping screws:  
•
•
•
•
Use M2.2 x 4.5 Philips Pan Head, Type AB, Steel, Zinc Clear, Trivalent self-tapping screws.  
Do not exceed 1.75 +0.5 in-lb [2.02 +6 cm-kg] of torque during screw installation.  
Use a minimum mount thickness of 0.3 mm.  
Use safe ESD practices when handling and mounting the engine.  
Figure 9. IS4910-01 / IS4911-01 Dimensions  
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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-tapping 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. A keying location point is provided on  
the bottom of the engine to assist with alignment.  
Warning: The limited warranty (on page 49) is void if the following recommendations are not adhered to when  
mounting the engine.  
When securing the engine with self-tapping screws:  
•
•
•
•
Use M2.2 x 4.5 Philips pan head, type AB, steel, zinc clear, trivalent self-tapping screws.  
Do not exceed 1.75 +0.5 in-lb [2.02 +6 cm-kg] of torque during screw installation.  
Use a minimum mount thickness of 0.3 mm.  
Use safe ESD practices when handling and mounting the engine.  
When securing the engine by utilizing the M2 threaded inserts:  
•
•
•
•
Use M2 x 0.4 Philips Pan Head, Type AB, Steel, Zinc Clear, or equivalent screws.  
Do not exceed 2.5 in-lb [2.88 cm-kg] of torque during screw installation.  
Use a minimum mount thickness of 0.3 mm.  
Use safe ESD practices when handling and mounting the engine.  
See Figure 10 on page 9 for detailed engine dimensions.  
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Figure 10. IS4910-02 / IS4911-02 Dimensions  
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Decode Printed Circuit 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.  
TTL Level RS232  
Figure 11. TTL Level RS232 Decode Board  
USB  
Figure 12. USB Decode Board Dimensions  
10  
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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 engine  
with self-tapping 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.  
A keying location point is provided on the bottom of the engine to assist with alignment.  
Warning: The limited warranty (on page 49) is void if the following recommendations are not adhered to when  
mounting the engine.  
When securing the engine by utilizing the M2 threaded inserts:  
•
•
•
•
Use M2 x 0.4 Philips Pan Head, Type AB, Steel, Zinc Clear, or equivalent screws.  
Do not exceed 2.5 in-lb [2.88 cm-kg] of torque when securing the engine module to the host.  
Use a minimum mount thickness of 0.3 mm.  
Use safe ESD practices when handling and mounting the engine.  
Figure 13. IS4920 / IS4921 Bracketed Decode Engine Dimensions  
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Enclosure Specifications  
The imaging engine was specifically designed for integration into custom housings for OEM applications. The  
imaging engine’s performance will be adversely affected or permanently damaged when mounted in an  
unsuitable enclosure.  
Warning: The limited warranty (on page 49) is void if the following considerations are not adhered to when  
integrating the area-imaging engine into a system.  
Electrostatic Discharge (ESD) Cautions  
All engines and decode boards are shipped in ESD protective packaging due to the sensitive nature  
of the exposed electrical components.  
•
•
ALWAYS use grounding wrist straps and a grounded work area when unpacking  
and handling the engine.  
Mount the engine in a housing that is designed for ESD protection and stray electric fields.  
ESD has the ability to modify the electrical characteristics of a semiconductor device, possibly  
degrading or even destroying the device. ESD also has the potential to upset the normal operation  
of an electronic system, causing equipment malfunction or failure.  
Airborne Contaminants and Foreign Materials  
The imaging engine has very sensitive miniature electrical and optical components that must be protected from  
airborne contaminants and foreign materials. In order to prevent permanently damaging the imaging engine  
and voiding the limited warranty (on page 49), the imaging engine enclosure must be:  
•
•
Sealed to prevent infiltration by airborne contaminants and foreign materials such as  
dust, dirt, smoke, and smog.  
Sealed to protect against water, humidity, and condensation.  
Refer to page 15 for information on power and thermal considerations.  
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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 output window’s distance and angle relative  
to the imaging engine’s camera aperture.  
Follow these guidelines when designing the output window.  
•
The output window material should have a spectral transmission of at least 85% from 580 nm to  
680 nm and should block shorter wavelengths.  
•
The output window should have a 60-40 surface quality, be optically flat, clear, and free of scratches,  
pits, or seeds. If possible, recess the window into the housing for protection or apply a scratch  
resistance coating (see Output Window Coatings below).  
•
•
Apply an anti-reflective coating to the window surfaces to reduce the possibility of reflective light  
interfering with the engine’s performance.  
The clear aperture of the output window should extend beyond the Field of View. Refer to page 14  
and pages 29 - 30 for Field of View specifications.  
•
•
•
The window size must accommodate the illumination and targeting areas shown on page 14.  
The window must be parallel to the engine face.  
The distance from the engine face to the inside surface of the window of the enclosure should be  
minimized and should not exceed 0.5 mm (0.02") due to possible specular reflections from internal  
area illumination.  
Output Window Coatings  
•
Anti-Reflection  
An anti-reflective coating can be applied to the inside and/or outside of the window to reduce the  
possibility of internal beam reflections interfering with the performance of the engine. If an anti-  
reflective coating is applied, the coating is recommended to be on both sides of the window providing a  
0.5% maximum reflectivity on each side from 600 - 700 nanometers at the nominal window tilt angle.  
The coating must also meet the hardness adherence requirements of MIL-M-13508.  
•
Polysiloxane Coating  
Applying a polysiloxane coating to the window surface can help protect the window from surface  
scratches and abrasions that may interfere with the performance of the engine. Recessing the window  
into the housing can also provide added protection against surface damage such as scratches and  
chips. If an anti-reflective coating is used, there is no need to apply a polysiloxane coating.  
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Optical Clearance Specifications  
The window size and enclosure design must provide unobstructed clearance for the illumination and targeting  
areas shown below in figures 14 and 15 to avoid optical interference that decreases the engine's performance.  
IS4910  
Figure 14. IS4910 Optical Clearance Specifications  
IS4911  
Figure 15. IS4911 Optical Clearance Specifications  
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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 VIN and GND pins of the ZIF connector on the  
decode board. This voltage must be maintained within the specified voltage range at the decode board  
(see electrical specifications on page 34). Voltage drops in the host flex cable must be taken into account.  
The power must be clean and heavily decoupled in order to provide a stable power source.  
Note: The power supply must be able to handle dynamic current loads because the input current will increase  
considerably when the illumination LEDs are enabled.  
Host Flex Cable  
The host flex cable is used to carry power and data signals between the decode engine and the host system.  
The flex cable should allow for minimal voltage drop and maintain a good ground connection between the host  
and the decode engine. In terms of grounding and voltage drop, a shorter cable is better.  
In addition to power, the flex cable will also carry the digital signals required for communication. The cable  
design is especially important in the case of USB due to the relative high speed of the USB signals.  
The impedance of the cable should match, or be as close as possible to, the impedance of the USB driver  
(approximately 45 ohms per trace).  
The routing of the host flex cable also plays a critical role in the system design. The cable should be routed  
away from high frequency devices since these frequencies can couple onto the flex cable and cause potential  
data corruption or unwanted electromagnetic inference, EMI.  
Power Sequencing*  
The decode engine is powered from the VIN power signal on the ZIF connector on the decode board. Most of  
the host signals (signals present on the ZIF connector) are relative to this voltage. Not all of these signals are  
overvoltage tolerant thus; care must be taken to ensure that the relationship between the VIN and the host  
signals are always met (see electrical specifications on page 34).  
Thermal Considerations  
The decode engine is qualified over the specified operational temperatures (0°C to 40°C) for all operating  
modes. Make sure ambient temperatures do not exceed this range in order to guarantee operation. Operating  
the decode engine in continuous mode for an extended period may produce considerable heating. This mode  
should be limited and sufficient airflow should be provided whenever possible to minimize internal heating.  
Excessive heating may degrade images and potentially damage the engine.  
* See page 38 for additional information on electrical specifications.  
See pages 38 and 42 for additional information on the engine pinouts and flex cable pinouts.  
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Theory of Operation  
Overview  
The IS4920 decode imaging engine series is ideal for integration into data 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.  
The decode engine consists of two main system components: the a non-decode imaging engine, which utilizes  
a high-resolution CMOS image sensor, and a small decode board that contains a powerful microprocessor and  
the firmware to control all aspects of the engine’s operations and enabling communication with the host system  
over the standard set of communication interfaces.  
The model IS492x-xx103 provides communication with the host system over TTL-level RS232 communication  
interface.  
The model IS492x-xx38 provides communication with the host system over USB. It can be configured for the  
following protocols of USB communication:  
•
•
USB Keyboard Emulation Mode (default)  
USB Serial Emulation Mode  
The system hardware architecture of the decode engine is shown in the figure below.  
Figure 16. IS4920 / IS4921 System Architecture  
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Host Interface Signals  
The host interface signals are described in the table below.  
Pin#  
TTL RS232  
USB  
Description  
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.  
1
232INV  
NC  
2
3
Vin  
Vin  
Power: Supply voltage input (3V to 5.5V)  
Ground: Power and signal ground.  
GND  
GND  
Input: TTL Level RS232 Receive data input, weak pull up to Vin.  
Polarity determined by Pin1  
4
5
6
(n)RxD  
(n)TxD  
(n)CTS  
D-  
Bidirectional: USB D- Signal  
Output: TTL Level RS232 transmits data. Polarity Determined  
by Pin 1  
<reserved>  
D+  
Input: TTL level Clear to Send, weak pull up to Vin. Polarity  
configurable via software  
Bidirectional: USB D+ signal  
Output: TTL level RS232 Request to Send. Polarity  
configurable via software  
7
8
(n)RTS  
<reserved>  
PWRDWN  
Output: Open drain, 100K pull up to Vin; active high indicates  
that the IS4920 is in Power Down Mode.  
PWRDWN  
Output: Open drain, 100K pull up to Vin; active low signal  
capable of sinking current. PWM controlled signal can  
be used to drive an external beeper.  
9
nBEEPER  
nBEEPER  
Output: Open drain, 100K pull up to Vin; active low signal for  
sinking current of a Good Read LED circuit.  
10  
nGoodRead  
nGoodRead  
Input: Weak pull up to Vin; active low, the signal can be used to  
bring the engine out of Power Down (TTL RS232 version  
only) or Sleep Mode (TTL RS232 and USB versions).  
11  
12  
nWAKE  
nTrig  
nWake  
nTrig  
Input: Weak pull up to Vin; active low, the signal can be used as  
a trigger input to activate the IS4920.  
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Since many host systems and applications have unique formats and protocol requirements, the decode engine  
supports a wide range of configurable features. These features may be selected by scanning a corresponding  
configuration bar code from the MetroSelect Single-Line Configuration Guide or Area Imaging Bar code  
Supplemental Configuration Guide. Both guides are available for download at www.honeywell.com/aidc under  
the IS4920 product page.  
Usage of the Host Interface Signals  
In the default “multi-try” trigger mode of operations, the scanning engine is activated by the nTrig signal, which  
must be kept active (low) until the successful scan is achieved, as indicated by the nGoodRead signal.  
Upon a successful scan, the decode engine asserts the nGoodRead signal and keeps it asserted (low) for the  
duration of transmission of the decoded data to the host, or for the minimum of 100 msec (configurable to 50  
msec), which coincides with the duration of the nBeeper signal.  
The nGoodRead and nBeeper signals are driven with LVC family open drain outputs and are pulled up on the  
decode board with 100K resistors to VIN. The default state of these pins is Hi-Z (pulled up via 100K) and these  
signals are capable of sinking up to 24mA each when driven to the low state. For beeper applications, care  
must be taken to ensure that inductive spikes do not cause the voltage on the lines to exceed the maximum  
voltage of 5.5V.  
Warning: The nGoodRead and nBeeper signals are not current limited. The external host circuitry connected  
to these pins must ensure that the current is limited to 25mA.  
At any given time, the decode engine can be in one of the following power modes, see page 20 for  
descriptions:  
•
•
•
•
•
•
•
Boot Mode  
Operating Mode  
Idle Mode  
Sleep Mode  
Presentation Wakeup Mode  
Power-down Mode (TTL Only)  
Suspend Mode (USB Only)  
When the decode engine is in the Sleep or Presentation Wakeup Mode, the nWake or nTrig signals can be  
used to wake up the engine.  
The nWake signal wakes up the engine and turns the engine into the Idle Mode, which in the TTL RS232  
version enables communication with the host for a short period of time defined by the value of the sleep  
timeout, which is set to one second by default.  
Note: In the USB decode engines with USB Serial Emulation Mode activated; communication with the host is  
enabled even when the engine is in the Sleep or Presentation Wakeup Mode.  
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The nTrig signal not only wakes the engine up, but also immediately activates 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.  
The PWDWN pin is used to indicate when the decode engine is in various operating modes such as Power  
Down, Suspend, and Boot.  
Note: The output signals from the decode engine can experience analog behavior when VIN is initially applied  
or removed due to the supply voltage ramping up or down. Care must be taken to ensure that this  
behavior does not adversely affect the host System. Special attention must be given to the PWRDWN  
Pin. When power is initially applied, the output state of this line will be indeterminate for about 10mS  
until the USB controller exits reset. The state of this pin should be disregarded during this time. The  
following waveforms show several signals when VIN is first applied (Figure 17) and when VIN is  
removed (Figure 18).  
Figure 17. VIN First Applied (USB)  
Figure 18. VIN Removed (USB)  
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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.  
•
•
The USB engine enters Boot Mode upon completion of USB enumeration.  
The engine can turn itself to Boot Mode from Operating Mode or Idle Mode upon some internal event,  
such as at the end of the software upgrade procedure.  
At the end of the boot-up cycle the engine turns to the Idle Mode and de-asserts the PWRDWN pin.  
Operating Mode  
The engine is acquiring and processing images or running other tasks.  
PWRDWN Pin State: De-asserted (LOW).  
Transition to Operating Mode:  
•
•
•
The engine is turned to Operating Mode from Idle, Sleep, or Presentation Wakeup Modes upon the  
reception of the nTrig signal.  
The engine can be turned to Operating Mode from Idle Mode (or Sleep Mode in USB version) upon the  
reception of a special single-byte serial command from the host. The byte value is configurable.  
The engine is turned to Operating Mode from the Presentation Wakeup Mode upon the object detection  
event.  
Idle Mode  
The engine is not operating, but not sleeping and is fully powered. The CPU and image sensor are in the Idle  
Mode, the wakeup from which does not require the image sensor reprogramming.  
PWRDWN Pin State: De-asserted (LOW).  
Transition to Idle Mode:  
•
•
The engine is turned to Idle Mode from Operating Mode immediately when no tasks are running in the  
engine.  
The engine is turned to Idle Mode from Sleep or Presentation Wakeup Modes upon the reception of the  
nWake signal.  
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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).  
Transition to Sleep Mode:  
•
The engine is turned to Sleep Mode from Idle Mode upon the expiration of the “sleep” timeout, which is  
set to one second by default. The “sleep” timeout is restarted every time the engine enters the Idle  
Mode.  
•
The engine can be turned to Sleep Mode from Operating Mode or Idle Mode immediately upon the  
reception of a special single-byte serial command from the host. The byte value is configurable.  
Power Down Mode (TTL RS232 Only)  
The power of the engine is turned off.  
PWRDWN Pin State: Asserted (HIGH).  
Transition to Power Down Mode:  
•
The engine is turned to Power Down Mode from Sleep Mode upon the expiration of the “power-down”  
timeout, which is set to 10 minutes by default. The “power-down” timeout is restarted every time the  
engine enters the Sleep Mode.  
•
The engine can be turned to Power Down Mode immediately upon the reception of a special single-  
byte serial command from the host. The byte value is configurable.  
The engine can wake up from Power Down Mode and reboot:  
Upon reception of the nTrig or nWake signals.  
•
Suspend Mode (USB Only)  
The engine is in its lowest power consumption state.  
PWRDWN Pin State: Asserted (HIGH).  
Transition to Suspend Mode:  
•
•
The engine is turned to Suspend Mode upon receiving the USB Suspend signal from the USB host.  
The engine can be turned to Suspend Mode any time (by the USB host).  
The engine can wake up from Suspend Mode and reboot:  
Upon receiving the Resume signal from the USB host.  
•
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Serial Configuration  
The IS4920 series can be configured by scanning configuration bar codes† or by serial commands sent from  
the host device. With serial configuration, each command sent to the engine is the ASCII representation of  
each numeral in the configuration bar code (see Figure 19). The entire numeric string is framed with an ASCII  
[stx] and an ASCII [etx].  
Do Not Include  
in the Command  
³
1
0
0
1
0
4
Include in the  
Command  
Figure 19.  
Example 1:  
Feature  
Host Command  
[stx]100104[etx]  
String Sent to the Engine - ASCII Representation (Hexadecimal Values)  
02h 31h 30h 30h 31h 30h 34h 03h  
Disable Codabar  
If the command sent to the engine is valid, the engine will respond with an [ack]. If the command sent to the  
engine is invalid, the engine will respond with a [nak] then automatically exit serial configuration mode. All the  
settings chosen in the failed serial configuration session will be lost. There is a 20-second window between  
commands. If a 60-second timeout occurs, the engine will send a [nak].  
To enter serial configuration mode, send the following command, [stx]999999[etx]. The engine will not scan  
bar codes while in serial configuration mode.  
Note: Serial configuration mode uses the current Baud Rate, Parity, Stop Bits and Data Bits settings that  
are configured in the engine. The default settings of the engine are 9600 bits-per-second, no parity,  
1 stop bit, 8 data bits, and no flow control. If a command is sent to the engine to change any of these  
settings, the change will not take effect until after serial configuration mode is exited.  
To exit serial configuration mode, send the following command, [stx]999999[etx]. The engine will respond with  
an [ack]. Refer to Example 2 on page 23.  
†
Bar code configuration manuals are available for download from the IS4920 product page at  
www.honeywell.com/aidc.  
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Example 2:  
The following sample illustrates the serial command sequence for configuring the engine for the  
factory default settings, disabling Code 128 scanning, and adding a “G” as a configurable prefix.  
Commands for features that require sequences of multiple bar codes for activation (i.e. prefixes,  
suffixes, and timeout features) should be sent in the same order that they are normally scanned.  
Engine  
Feature  
Host Command  
[stx]999999[etx]  
[stx]999998[etx]  
[stx]100113[etx]  
[stx]903500[etx]  
[stx]0[etx]  
ASCII Representation  
02h 39h 39h 39h 39h 39h 39h 03h  
02h 39h 39h 39h 39h 39h 38h 03h  
02h 31h 30h 30h 31h 31h 33h 03h  
02h 39h 30h 33h 35h 30h 30h 03h  
02h 30h 03h  
Response  
[ack] or 06h  
[ack] or 06h  
[ack] or 06h  
[ack] or 06h  
[ack] or 06h  
[ack] or 06h  
[ack] or 06h  
Enter Configuration Mode  
Load Defaults  
Disable Code 128  
Configure Prefix #1  
Code Byte 0  
Code Byte 7  
[stx]7[etx]  
02h 37h 03h  
Code Byte 1  
[stx]1[etx]  
02h 31h 03h  
Exit Configuration Mode  
[stx]999999[etx]  
02h 39h 39h 39h 39h 39h 39h 03h  
[ack] or 06h  
Abbreviated ASCII Table  
Character  
Hex Value  
Decimal Value  
[STX]  
02h  
03h  
06h  
15h  
30h  
31h  
32h  
33h  
34h  
35h  
36h  
37h  
38h  
39h  
2
[ETX]  
3
[ACK]  
6
[NAK]  
21  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
0
1
2
3
4
5
6
7
8
9
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Operational Timing  
The following section describes the timing 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 = 3.3V, nGoodRead pulled up with 10K resistor to VIN, and nBeeper pulled up with 10K  
resistor to VIN, unless otherwise noted.  
Power Up / Boot Up  
The power up sequence of the decode engine depends on the interface type. For the USB version, a USB  
Microcontroller controls the power to the decoding platform and imaging engine via a power switch. When  
power is initially applied, only the USB controller is active and begins the process of enumeration. Once  
enumeration is complete, the USB controller turns power on to the imaging engine and decoding platform. As a  
result, powering up the engine is completely controlled by the on board USB controller per the USB  
specifications. In this version, only Idle and Sleep Modes are supported. For additional power savings, the unit  
must be placed in Suspend Mode per the USB specification. Figure 20 shows the power up sequence of the  
USB version of the decode engine.  
Note: The PWNDWN signal remains high until the Decode platform transitions to Idle Mode and is ready to  
accept commands. In the USB version, the PWNDWN Pin will only be high during this boot up condition  
or when the Decode enters, Suspend Mode. From Figure 20 , it can be seen that the entire boot up  
sequence takes approximately nine seconds.  
Figure 20. Power Up / Boot Up Sequence of USB Version  
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The TTL version of the decode engine does not have an on board 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). When VIN is initially applied with the nWake and nTrig signals held  
high, the unit will be in the Power Down Mode. In this state, the PWRDWN signal will be high and all other  
output signals will be in their default state. By bringing either the nTrig or nWake signal low, power will be  
applied to the entire system and the unit will enter the Boot Mode. The nTrig or nWake signal will need to be  
held low continuously for approximately two seconds at which time the decode engine will take control of the  
internal power circuitry. At this point, the nTrig and nWake signals can be used with out interrupting the power.  
Figures 21 - 23 show the state several host signals when power is first applied and when the unit enters boot  
mode.  
Note: The default state of TxD depends on the 232INV signal. When 232INV is low, the default state of TxD  
is high. When INV is high, the default state of TxD is low.  
Figure 21. Power First Applied of TTL  
Version (Vin= 5V)  
Figure 22. Boot Up Sequence of TTL Version  
(Vin= 5V) initiated by nTrig  
Figure 23. Transmit and RTS during Boot  
Up forTTL Version (Vin= 5V)  
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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. Also, the RTS signal may have the incorrect polarity when the device first enters Boot  
Mode (Figure 23) or right before the unit enters Power Down Mode (Figure 24).  
The USB version can be placed into Suspend Mode via the USB suspend signal for low current consumption.  
When this occurs, power to the decoding platform and imaging engine is removed. While in this state,  
nBeeper and nGoodRead will be in their default state (Hi-z with weak pull up). PWRDWN will be high and the  
USB data lines will be in the Suspend Mode.  
Power Down / Suspend / Power Removed  
At any time VIN can be completely removed from the decode engine however, care must be taken to avoid  
removing power during the boot up, flash upgrades, or configuration updates. Removing power during these  
times can result in the corruption of the flash memory. Figure 18 shows several host signals during a power  
removed condition for the USB version.  
The TTL version enters into the Power Down Mode in which power to the decoding platform and imaging  
engine is removed. The decoding processor can initiate a Power Down sequence after a programmable time  
period has elapsed without any activity. Figure 24 shows the TxD, RTS, VIN, and PWRDWN signals when the  
TTL enters into Power Down Mode.  
Figure 24. Power Down for TTL  
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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. During image acquisition, the illumination  
LEDs are enabled for a time determined by the FirstFlash circuitry on the non-decode engine. The image is  
then transferred to the processor and decoded. Upon decoding the image, the processor asserts the  
nGoodRead signal (low) and beings transmitting the decoded data. When the decode engine receives a trigger  
signal while in the Sleep Mode, an additional delay is needed for the processor exit Sleep Mode and  
reconfigures the sensor.  
Figure 25 and Figure 26 show the amount of time required for decoding when a nTrig signal is asserted in both  
the Idle Mode and Sleep Mode.  
Notes: The total image acquisition / decode time can be approximated by measuring the time from the nTrig  
signal going low to the nGoodRead signal going low. This time will vary slightly based on several  
factors including code quality, code type, and distance from the engine. The following waveforms  
show a typical condition.  
The nTrig signal must be kept low for at least 20msec.  
Figure 25. Decode time after receiving nTrig signal in Idle Mode.  
Figure 26. Decode time after receiving nTrig signal in Sleep Mode.  
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Summary of Operation Timings  
Operation Timing Specifications  
Parameter  
Tprw_up  
Description  
Typical  
Relevant Note(s)  
Power Applied to Processor Ready Delay (USB)  
6 seconds Notes 4 and 5  
Tprw_up_ttl  
Tdec_idle  
Trigger or Wake Low to Processor Ready Delay (TTL) 5 seconds Note 4  
Trigger Low to Decode complete Delay  
Trigger Low to Decode complete Delay  
Minimum Duration of Trigger Signal  
90 msec  
Notes 1 and 2  
Tdec_sleep  
Trig_min  
120 msec Notes 1 and 3  
20 msec  
Minimum Activation Time for Trigger or  
Wake Signal to Power Up TTL Unit  
Trig_wake_min_pu  
2 seconds  
Notes:  
1. Timing is the same for Both TTL or USB version  
2. Processor is in Idle Mode when nTrig signal is received  
3. Processor is in Sleep Mode when nTrig signal is received  
4. Typical time specified may vary depending on the enumeration time of the USB host.  
5. Typical times specified are valid for an IS4920 or an IS4921 with a firmware version of 15848 or  
higher. Units with a firmware version lower than 15848 may require up to 3 seconds of an additional  
time.  
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Depth of Field vs. Bar Code Element  
IS4920  
Depth of Field*  
(In the Field of View)  
Bar Code  
Element Width  
Total  
Start  
End  
(From Engine Face)  
(From Engine Face)  
.127 mm  
.254 mm  
.330 mm  
.127 mm  
.254 mm  
.254 mm  
.381 mm  
.508 mm  
5 mil  
50 mm (2.0")  
30 mm (1.2")  
25 mm (1.0")  
45 mm (1.8")  
25 mm (1.0")  
50 mm (2.0")  
35 mm (1.4")  
40 mm (1.6")  
145 mm (5.7")  
210 mm (8.3")  
310 mm (12.2")  
160 mm (6.3")  
270 mm (10.6")  
95 mm (3.7")  
95 mm (3.7")  
180 mm (7.1")  
285 mm (11.2")  
115 mm (4.5")  
245 mm (9.6")  
45 mm (1.8")  
125 mm (4.9")  
220 mm (8.7")  
1D  
10 mil  
13 mil  
5 mil  
PDF  
10 mil  
10 mil  
15 mil  
20 mil  
Data  
Matrix  
160 mm (6.3")  
260 mm (10.2")  
*
Depth of field information is for reference only. Actual values may vary depending on testing conditions.  
Figure 27. Field of View, Divergence Angle (model IS4910-01 shown)  
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IS4921  
Depth of Field* in the Field of View  
End  
Bar Code Element Width  
Start  
Total  
(From Engine Face)  
68 mm (2.7")  
50 mm (2.0")  
50 mm (2.0")  
45 mm (1.8")  
(From Engine Face)  
105 mm (4.1")  
120 mm (4.7")  
170 mm (6.7")  
130 mm (5.0")  
.076 mm  
.127 mm  
.330 mm  
.127 mm  
3 mil  
5 mil  
13 mil  
5 mil  
37 mm (1.4")  
70 mm (2.75")  
120 mm (4.7")  
85 mm (3.2")  
1D  
PDF  
Data Matrix  
and QR  
.127 mm  
5 mil  
75 mm (3.0")  
115 mm (4.5")  
40 mm (1.5")  
* Depth of field information is for reference only. Actual values may vary depending testing conditions.  
Figure 28. IS4911 Field of View, Divergence Angle (model IS4911-01 shown)  
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Exposure Time for Image Acquisition  
By default, the maximum exposure time for image acquisition is 8 ms. Reducing the exposure time for image  
acquisition may improve the reading performance of high-density bar codes for certain applications. Use the  
following bar codes to set the desired maximum exposure time.  
Set Exposure Time to 1 ms  
³
3
2
7
6
1
0
Set Exposure Time to 2 ms  
³
3
2
7
6
1
2
Set Exposure Time to 3 ms  
³
3
2
7
6
3
0
Set Exposure Time to 4 ms  
³
3
2
7
6
4
0
Set Exposure Time to 5 ms  
³
3
2
7
6
5
0
Set Exposure Time to 6 ms  
³
3
2
7
6
6
0
Set Exposure Time to 7 ms  
³
3
2
7
6
7
0
Set Exposure Time to 8 ms  
³
3
2
7
6
0
0
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Design Specifications  
Operational  
Light Source: Four, 650 nm Red Light Emitting Diode LED  
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.  
IS4920  
IS4921  
Depth of Field:  
Field of View:  
50 mm – 170 mm (2.0" to 6.7") for 0.330 mm (13 mil) 1D Bar Codes  
See page 30 for additional information on engine depth of field.  
50° Horizontal  
37.5° Vertical  
IS4920  
IS4921  
38° Horizontal  
28.5° Vertical  
118.4 mm x 86.2 mm (4.7" x 3.4")  
at 127 mm (5.0") from the Face of the Engine  
IS4920  
IS4921  
236.8 mm x 172.4 mm (9.3" x 6.8")  
at 254 mm (10.0") from Face of the Engine  
Scan Area:  
37 mm x 28 mm (1.45" x 1.08")  
at 80 mm (3.15") from the Face of the Engine  
78 mm x 58 mm (3.09" x 2.3")  
at 170 mm (6.69") from the Face of the Engine  
Rotation Sensitivity: 360° Around the Optical Axis  
.10 mm (4.0 mil) 1D, PDF  
IS4920  
.191 mm (7.5 mil) 2D  
.063 mm (2.5 mil) 1D, PDF  
.10 mm (4.0 mil) 2D  
Minimum Element Width:  
IS4921  
Resolution: 1.2 mega pixels (1280 x 960)  
Symbologies Supported: All standard 1D and 2D Bar Codes; Optional OCR fonts.  
Print Contrast: 20% Minimum  
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Mechanical  
Dimensions: See pages 6 - 8 for detailed specifications.  
Weight: < 14 g (.494 oz.)  
12-Pin, Molex FFC/FPC Connector (Molex P/N 52559-1252)  
Termination:  
See page 38 for engine pinouts.  
See page 42 for flex cable specifications.  
Mounting: See pages 6 - 11 for detailed specifications.  
Keying Location: See pages 6 - 11 for detailed specifications.  
FFC/FPC is a trademark of Molex, Inc., all rights reserved.  
Environmental  
Operating Temperature: 0°C to 40°C (32°F to 104°F)  
Storage Temperature: -20°C to 70°C (-4°F to 158°F)  
See page 15 for additional information on thermal considerations.  
Humidity: 5% to 95% relative humidity, non-condensing  
Light Levels: 0 - 110,000 Lux  
Shock: 5 ft. (1.5 m)  
Vibration Protection: 7G, 10 – 500 Hz  
Contaminants: See page 12.  
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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)  
Idle Current: 160 mA (typical VIN=3.3V @ 25°C)  
Sleep Current: 65 mA (typical VIN=3.3V @ 25°C)  
400 mA (typical VIN=3.3V @ 25°C)  
125 mA (typical VIN=3.3V @ 25°C)  
25 mA (typical VIN=3.3V @ 25°C)  
Suspend Current (USB): 600 µA* (typical VIN=3.3V @ 25°C)  
Power Down Current (TTL): N/A  
N/A  
500 µA* (typical VIN=3.3V @ 25°C)  
* Specifications are based on the assumption inputs are pulled high. If inputs are externally pulled low, the  
current through the pull up registers must be added to these numbers.  
See pages 46 - 48 for regulatory compliance information.  
Detailed Electrical Specifications  
Absolute Maximum Ratings  
Signal  
Signal Description  
MIN  
MAX  
Vinput †  
Voutput  
Voltage Applied to Any input pin (except D+ and D-) *  
Voltage Applied to Any output pin **  
-0.3V  
-0.3V  
5.5V  
VIN + .3V  
*
For USB version, Voltages on D+ and D- signal must conform to USB Specification  
** Voutput must be less than 5.5V for all pins  
†
If the Vinput signal is greater than VIN, current will flow from the input to the VIN pin through the pull-up  
resistors on the engine. In Suspend Mode, this may cause current to flow into the USB power. This is not  
recommended.  
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DC Operating Voltages  
MIN  
Signal  
VIN  
Signal Description  
MAX  
5.5V  
Condition  
Operating Voltage  
3V  
VIH(1)  
VIL(1)  
VIH(2)  
VIL(2)  
VIH(3)  
VIL(3)  
VOH(1)  
VOL(1)  
VOH(2)  
VOL(2)  
VOH(3)  
VOL(3)  
Input High (RX, CTS)  
2.5V  
Input Low (RX, CTS)  
.8V  
Input High (TTL_INV, nWake)  
Input Low (TTL_INV, nWake)  
Input High (Trigger)  
.8xVIN  
.8xVIN  
.8xVIN  
***  
.8V  
Input Low (Trigger)  
.25V  
Output High Voltage (TX,RTS)  
Output Low Voltage (TX,RTS)  
Output High Voltage (nBeeper, nGoodRead)  
Output Low Voltage (nBeeper, nGoodRead)  
Output High Voltage (Power down)  
Output Low Voltage (Power down)  
Isource = 16 mA  
Isink = 16 mA  
.14xVIN  
5.5V  
.6V  
Isink = 25 mA  
Isink = 8 mA  
***  
5.5V  
.2V  
*** PWRDWN, nGoodRead, and nBeeper are open drain outputs w/ 100K pull-ups to VIN. Actual VOH will be  
determined by the parallel resistance of the 100K pull up and any external impedance.  
Current Draw @ 25°C  
USB  
TTL  
Signal  
Signal Description  
VIN = 3.3V VIN = 5V VIN = 3.3V VIN = 5V  
Continuous  
Scan mode  
Average current draw during continuous  
scan mode*  
235 mA  
160 mA  
175 mA  
120 mA  
65 mA  
650 µA  
N/A  
200 mA  
125 mA  
25 mA  
N/A  
140 mA  
85 mA  
25 mA  
N/A  
Idle  
Average current draw while in idle mode  
Sleep  
Average current draw while in sleep mode 65 mA  
Suspend  
Mode (USB) (USB version only)  
Power Down Average current draw in power down mode  
Mode (TTL)  
Average current draw in USB suspend  
600 µA  
N/A  
500 µA  
500 µA  
(TTL Version Only)  
* Note: Continuous Scan Mode current will vary based on object size, distance, and type. The numbers listed  
above are typical.  
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Current Waveforms  
Figure 29 - Figure 31 show typical current signature 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. Thus, these waveforms only account for the current  
drawn by the IS4920 circuitry and does not show additional current required for driving the LED or  
Beeper.  
The IS4920 series engines do not have current limiting fuses. Care must be taken on the host side to prevent  
against over current conditions that could potential damage the host system.  
Figure 29. Single Image Decode Current Waveform (from Idle Mode)  
Figure 30. Continuous Image Decode Current Waveform (I_ave = 204mA)  
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Figure 31. Power Up / Boot Up Current Waveform  
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Imaging Engine and Decode PCB Terminations  
Imaging Engine Interface Connector  
Figure 32. Imaging Engine Interface Connector  
Pin  
Signal Name  
Aimer  
Illum_On  
Trigger  
SDA  
Function  
1
2
3
4
5
6
7
8
9
High enables Targeting LED (Input)  
High forces on Illumination LEDs (Input), Wake up Engine  
Controls Integration and Illumination in Snapshot mode (Input)  
I2C data (Bi-Directional) – Devices Functions as Auxiliary Devices  
I2C clock (Bi-Directional) – Devices Function as Auxiliary Devices  
Voltage Supply for Targeting and Area LEDs (3V - 5.5V)  
Pixel Data0 (LSB) (Output)  
SCL  
VLED  
D0  
Vimager  
D1  
Camera Voltage (3.1V - 3.5V)  
Pixel Data1 (Output)  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
D2  
Pixel Data2 (Output)  
D3  
Pixel Data3 (Output)  
PCLK  
D7  
Pixel Clock (Output)  
Pixel Data7 (Output)  
D6  
Pixel Data6 (Output)  
D5  
Pixel Data5 (Output)  
D4  
Pixel Data4 (Output)  
VSYNC  
HSYNC  
GND  
Vertical Sync (Output)  
Horizontal Sync (Output)  
Power and Signal ground  
Reserved  
GND  
Terminate with Resistor, Pulled Low, or Leave Unconnected  
Power and Signal Ground  
NC  
No Connection  
* In the Phillips I2C specification auxiliary is defined as slave.  
38  
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Decode Board (USB & TTL) Interface Connector  
Figure 33. Decode Board Interface Connector  
Function  
Pin  
Signal Name  
GND  
1
2
3
4
5
6
7
8
9
Power and Signal Ground  
Reserved  
GND  
HSYNC  
VSYNC  
D4  
Terminate with resistor, Pulled low, or Leave Unconnected  
Power and Signal Ground  
Horizontal Sync (Output)  
Vertical Sync (Output)  
Pixel Data4 (Output)  
D5  
Pixel Data5 (Output)  
D6  
Pixel Data6 (Output)  
D7  
Pixel Data7 (Output)  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
PCLK  
NC  
Pixel Clock (Output)  
No Connection  
D3  
Pixel Data3 (Output)  
D2  
Pixel Data2 (Output)  
D1  
Pixel Data1 (Output)  
Vimager  
D0  
Camera Voltage (3.1V - 3.5V)  
Pixel Data0 (LSB) (Output)  
VLED  
SCL  
Voltage supply for Targeting and Area LEDs (3V - 5.5V)  
I2C clock (Bi-Directional) – Devices Function as Auxiliary Devices  
I2C Data (Bi-Directional) – Devices Function as Auxiliary Devices  
Controls Integration and Illumination in Snapshot Mode (Input)  
High Forces on Illumination LEDs (Input)  
High Enables Targeting LED (Input)  
SDA  
Trigger  
Illum_On  
Aimer  
39  
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Decode Board (USB) Output to Host Connector  
Figure 34. Decode Board (USB) Output Connector  
Function  
Pin  
Signal Name  
N/C  
1
2
3
4
5
6
7
8
9
No Connection  
Vin  
Power: Supply voltage input (3V to 5.5V)  
Ground: Power and signal ground.  
GND  
D-  
Input: USB D- Signal  
<reserved>  
D+  
Pin Function Reserved.  
Input: USB D+ Signal  
<reserved>  
PWRDWN  
nBEEPER  
nGoodRead  
nWAKE  
nTrig  
Pin Function Reserved.  
Output: active high = IS4920 is in power down mode.  
Output: active low signal capable of sinking current.  
Output: active low signal for sinking current (Good Read).  
Input: Wakes engine from power-down or sleep mode.  
Input: Signal used as trigger input to activate the IS4920  
10  
11  
12  
40  
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Decode Board (TTL) Output to Host Connector  
Figure 35. Decode Board (TTL) Output Connector  
Pin  
Signal Name  
232INV  
Vin  
Function  
Input: TTL RS232 polarity control with 32k ohm pull-up.  
Power: Supply voltage input (3V to 5.5V)  
1
2
3
4
5
6
7
8
9
GND  
Ground: Power and signal ground.  
(n)RxD  
Input: TTL Level RS232 Receive data input.  
Output: TTL Level RS232 transmit data.  
(n)TxD  
(n)CTS  
Input: TTL level Clear to Send.  
(n)RTS  
Output: TTL level RS232 Request to Send.  
Output: active high = IS4920 is in power down mode.  
Output: active low signal capable of sinking current.  
Output: active low signal for sinking current (Good Read).  
Input: Signal used to bring engine out of power-down.  
Input: Signal used as trigger input to activate the IS4920  
PWRDWN  
nBEEPER  
nGoodRead  
nWAKE  
nTrig  
10  
11  
12  
41  
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Flex Cable Specifications  
Flex Cable Pinout – Imaging Engine Connection  
Figure 36. Flex Cable Pinout (Imaging Engine Connector End)  
Function  
Pin  
Signal Name  
Aimer  
Illum_On  
Trigger  
SDA  
1
2
3
4
5
6
7
8
9
High enables Targeting LED (Input)  
High forces on Illumination LEDs (Input), Wake up Engine  
Controls Integration and Illumination in Snapshot mode (Input)  
I2C data (Bi-Directional) – Devices Functions as Auxiliary Devices  
I2C clock (Bi-Directional) – Devices Function as Auxiliary Devices  
Voltage Supply for Targeting and Area LEDs (3V - 5.5V)  
Pixel Data0 (LSB) (Output)  
SCL  
VLED  
D0  
Vimager  
D1  
Camera Voltage (3.1V - 3.5V)  
Pixel Data1 (Output)  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
D2  
Pixel Data2 (Output)  
D3  
Pixel Data3 (Output)  
PCLK  
D7  
Pixel Clock (Output)  
Pixel Data7 (Output)  
D6  
Pixel Data6 (Output)  
D5  
Pixel Data5 (Output)  
D4  
Pixel Data4 (Output)  
VSYNC  
HSYNC  
GND  
Vertical Sync (Output)  
Horizontal Sync (Output)  
Power and Signal ground  
Reserved  
GND  
Terminate with Resistor, Pulled Low, or Leave Unconnected  
Power and Signal Ground  
NC  
No Connection  
42  
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Flex Cable Pinout – Decode Board Connection  
Figure 37. Flex Cable Pinout (Decode Connector End)  
Function  
Pin  
Signal Name  
GND  
1
2
3
4
5
6
7
8
9
Power and Signal Ground  
Reserved  
GND  
HSYNC  
VSYNC  
D4  
Terminate with resistor, Pulled low, or Leave Unconnected  
Power and Signal Ground  
Horizontal Sync (Output)  
Vertical Sync (Output)  
Pixel Data4 (Output)  
D5  
Pixel Data5 (Output)  
D6  
Pixel Data6 (Output)  
D7  
Pixel Data7 (Output)  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
PCLK  
NC  
Pixel Clock (Output)  
No Connection  
D3  
Pixel Data3 (Output)  
D2  
Pixel Data2 (Output)  
D1  
Pixel Data1 (Output)  
Vimager  
D0  
Camera Voltage (3.1V - 3.5V)  
Pixel Data0 (LSB) (Output)  
VLED  
SCL  
Voltage supply for Targeting and Area LEDs (3V - 5.5V)  
I2C clock (Bi-Directional) – Devices Function as Auxiliary Devices  
I2C Data (Bi-Directional) – Devices Function as Auxiliary Devices  
Controls Integration and Illumination in Snapshot Mode (Input)  
High Forces on Illumination LEDs (Input)  
High Enables Targeting LED (Input)  
SDA  
Trigger  
Illum_On  
Aimer  
43  
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Dimensions  
Figure 38. Flex Cable Dimensions, P/N 77-77104  
See installation warning on page 45.  
44  
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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 page 49.  
Figure 39. Flex Cable Orientation – Imaging Engine  
Figure 40. Flex Cable Orientation – Decode Board  
Note 2.  
Note 3.  
Proper installation of the flex cable is essential for engine performance. When installing the flex  
cable, verify that the flex cable receptacle is fully seated in the engine plug. To achieve a full  
connection, ensure that the alignment of the mating parts is not angled during installation. Flex  
cable P/N 77-77104 is designed with universal ends.  
Once installed, it is recommended that the flex cable be connected and routed securely in the  
enclosure to prevent loss of connection.  
45  
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Regulatory 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. IEC Class 1 is defined as follows:  
The specifications required for agency approval are not obtainable until the IS4920 or IS4911 area imaging  
engine is used in its final configuration. Honeywell International Inc. is unable to fulfill these requirements  
because the imaging engine will operate differently depending upon where the engine is used as a component.  
If the product containing the engine is to be used other than the United States, the manufacturer who  
incorporates the imaging engine into their product is responsible for fulfilling any regulatory compliance  
requirements for that country. Refer to one of the following sections for further explanation.  
Europe  
The CE Mark is required on products that incorporate the IS4920 series engine if the products are to be  
imported into European Economic Area (EEA) countries. Use of the CE Mark requires compliance with  
directives and standards dependent upon the type of product. Information may be found at  
http://europa.eu.int/comm/enterprise/newapproach/.  
LED Safety  
IEC 60825-1:1993+A1+A2,  
EN 60825-1:1994+A1+A2  
“Safety of LED products”  
Compliance with either of the standards listed above is required for the product to bear the CE mark.  
Note: Non-EEA countries may impose additional testing/certification requirements.  
EMC  
All combinations of IS4920 area imaging engines and associated electronics will require certification of  
compliance with the European EMC Directive. EMC compliance of finished products in Europe can be  
accomplished by the following method:  
The manufacturer may certify to the EC’s Electromagnetic Compatibility Directive 89/336/EEC. Compliance is  
required for the product to bear the CE Mark.  
Note: Non-EEA countries may impose additional testing/certification requirements.  
The IS4920 series area imaging engine is designed to meet EN55022 Radiated Class B emission limits.  
The engine was installed in a representative system and tested for compliance.  
Electrical Safety  
The IS4920 engines are built to conform to the European Low Voltage Directive 73/23/ EEC.  
46  
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United States  
EMC  
All combinations of imaging engines and associated electronics will require testing to insure compliance with  
the following Federal Communications Commission regulation: 47 CFR Part 15  
Note: When using the imaging engine with RF equipment, modems, etc. may require examination(s) to the  
standard(s) for the specific equipment combination. It is the manufacturers’ responsibility to comply  
with the applicable federal regulation(s).  
The IS4920 series area imaging engine is designed to meet EN55022 Radiated Class B emission limits.  
The engine was installed in a representative system and tested for compliance.  
Canada  
EMC  
Products meeting FCC 47 CFR Part 15 will meet Industry Canada interference-causing equipment standard for  
digital apparatus, ICES-003. Additional testing is not required.  
A written notice indicating compliance must accompany the apparatus to the end user. The notice shall be in  
the form of a label that is affixed to the apparatus. The notice may be in the form of a statement included in the  
user’s manual if, because of insufficient space or other restrictions, it is not feasible to affix a label to the  
apparatus.  
47  
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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 to meet EN55022 Radiated Class B  
emission limits. Using the system shown below, the decode engine was able to meet these requirements with  
an input voltage VIN = 3.3V and the camera interface operating at its maximum frequency of 48MHz.  
Figure 41. IS4920 EMI Test System  
Components used in IS4920 EMI test system  
Part Number  
Part Description/Function  
IS4920-USB  
77-77104A  
77-77095A  
52-52828  
Imaging decode engine  
Imager to Decode Flex cable assembly (shielded)  
IS4920 test adapter board  
USB cable (A to B)  
19-00329  
12 pin Host Flex cable  
Given the decoding platform architecture described above, the harmonics of 48MHz and 100MHz were most  
prevalent.  
48  
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Limited Warranty  
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. This warranty does not cover any HII product which is (i) improperly  
installed or used; (ii) damaged by accident or negligence, including failure to follow the proper maintenance,  
service, and cleaning schedule; or (iii) damaged as a result of (A) modification or alteration by the purchaser or  
other party, (B) excessive voltage or current supplied to or drawn from the interface connections, (C) static  
electricity or electro-static discharge, (D) operation under conditions beyond the specified operating  
parameters, or (E) repair or service of the product by anyone other than HII or its authorized representatives.  
This warranty shall extend from the time of shipment for the duration published by HII for the product at the  
time of purchase ("Warranty Period"). Any defective product must be returned (at purchaser’s expense) during  
the Warranty Period to HII factory or authorized service center for inspection. No product will be accepted by  
HII without a Return Materials Authorization, which may be obtained by contacting HII. In the event that the  
product is returned to HII or its authorized service center within the Warranty Period and HII determines to its  
satisfaction that the product is defective due to defects in materials or workmanship, HII, at its sole option, will  
either repair or replace the product without charge, except for return shipping to HII.  
EXCEPT AS MAY BE OTHERWISE PROVIDED BY APPLICABLE LAW, THE FOREGOING WARRANTY IS  
IN LIEU OF ALL OTHER COVENANTS OR WARRANTIES, EITHER EXPRESSED OR IMPLIED, ORAL OR  
WRITTEN, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR  
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.  
HII’S RESPONSIBILITY AND PURCHASER’S EXCLUSIVE REMEDY UNDER THIS WARRANTY IS LIMITED  
TO THE REPAIR OR REPLACEMENT OF THE DEFECTIVE PRODUCT WITH NEW OR REFURBISHED  
PARTS. IN NO EVENT SHALL HII BE LIABLE FOR INDIRECT, INCIDENTAL, OR CONSEQUENTIAL  
DAMAGES, AND, IN NO EVENT, SHALL ANY LIABILITY OF HII ARISING IN CONNECTION WITH ANY  
PRODUCT SOLD HEREUNDER (WHETHER SUCH LIABILITY ARISES FROM A CLAIM BASED ON  
CONTRACT, WARRANTY, TORT, OR OTHERWISE) EXCEED THE ACTUAL AMOUNT PAID TO HII FOR  
THE PRODUCT. THESE LIMITATIONS ON LIABILITY SHALL REMAIN IN FULL FORCE AND EFFECT  
EVEN WHEN HII MAY HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH INJURIES, LOSSES, OR  
DAMAGES. SOME STATES, PROVINCES, OR COUNTRIES DO NOT ALLOW THE EXCLUSION OR  
LIMITATIONS OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR  
EXCLUSION MAY NOT APPLY TO YOU.  
All provisions of this Limited Warranty are separate and severable, which means that if any provision is held  
invalid and unenforceable, such determination shall not affect the validity of enforceability of the other  
provisions hereof. Use of any peripherals not provided by the manufacturer may result in damage not covered  
by this warranty. This includes but is not limited to: cables, power supplies, cradles, and docking stations. HII  
extends these warranties only to the first end-users of the products. These warranties are non-transferable.  
The duration of the limited warranty for the IS4920 and IS4921 is two year(s). The accessories have a 90 day  
limited warranty from the date of manufacture.  
49  
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Patents  
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; 6,971,577; 6,971,578; 6,978,936; 6,988,660;  
6,991,166; 7,028,904; 7,040,540; 7,066,391; 7,070,107; 7,077,319; 7,077,327; 7,086,594; 7,086,595;  
7,104,455; 7,111,786; 7,128,266; 7,178,733; 7,185,817; 7,188,770; 7,213,762; 7,216,810; 7,225,988;  
7,225,989; 7,237,722; 7,240,844; 7,243,847; 7,255,279; 7,267,282; 7,270,272; 7,273,180; 7,278,575;  
7,281,661; 7,284,705; 7,293,714; 7,299,986; 7,320,431  
No license, right or sublicense is granted, either expressly or by implication, estoppel, or otherwise, under any  
Metrologic, Honeywell or third party intellectual property rights (whether or not such third party rights are  
licensed to Metrologic and/or Honeywell), including any third party patent listed above, except for an implied  
license only for the normal intended use of the specific equipment, circuits, and devices represented by or  
contained in the products that are physically transferred to the user, and only to the extent of those license  
rights and subject to any conditions, covenants and restrictions therein.  
Other worldwide patents pending.  
50  
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Index  
A
H
Aiming............................................................ 16, 34  
Ambient Light....................................................... 16  
Ambient Temperature.......................................... 15  
Area Illumination.................................................... 4  
ASCII ............................................................. 22, 23  
Assembly ............................................................... 3  
Humidity....................................................12, 33, 49  
I
Illumination ...............................4, 13, 14, 34, 37–41  
Imager ....................................................................4  
Imaging Engine...................................................1, 4  
Imaging Sensor ....................................................16  
Input..........................................................34, 37–41  
B
Bar Code.................................................. 29, 30, 32  
Bracket................................................................... 3  
Bus....................................................................... 16  
K
Keying...............................................................4, 33  
Keying Location................................................6–11  
C
L
Cable ................................................................... 15  
Camera Aperture ............................................. 4, 13  
CMOS sensor .................................................. 1, 16  
Connector .......................4, 5, 10, 33, 37–41, 44, 45  
Contaminants........................................... 12, 33, 49  
Contrast ............................................................... 32  
Current................................................................. 34  
Customer Service .................................... 49, 53, 54  
Label.......................................................................5  
Light Levels ..........................................................34  
Light Source .........................................................32  
Limited Warranty ..................................................49  
M
Mega-pixel..............................................................1  
Mode  
D
serial..................................................................22  
Snapshot .....................................................16, 34  
Video ...........................................................16, 34  
Model......................................................................1  
Mounting...........................................................6–11  
Depth of Field .......................................... 29, 30, 32  
Divergence Angle .................................... 14, 29, 30  
E
Electrical  
O
Current Draw .................................................... 36  
DC voltages ...................................................... 34  
Max Ratings...................................................... 34  
Electrical Specification................................... 34, 46  
Electrostatic Discharge............................ 12, 34, 49  
EMC............................................................... 46, 47  
Enclosure..................................... 12–14, 44, 45, 49  
Optical Clearance.................................................14  
ORC  
Fonts....................................................................1  
MICR....................................................................1  
ORC-A .................................................................1  
ORC-B .................................................................1  
Output.............................................................37–41  
F
P
Field of View ...................................... 13, 29, 30, 32  
FirstFlash® ............................................ 1, 4, 16, 27  
Flex Cable................................................See Cable  
Part Number ...........................................................1  
PCLK ....................................................................16  
Pin ..................................................................37–41  
Pixel..........................................................16, 37–41  
G
Ground..................................................... 12, 37–41  
51  
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Plug.......................................................... 32, 37–41  
Power................................................................... 15  
Power Supply....................................................... 15  
Thermal Temperature...........................................15  
Threaded Inserts ....................................................8  
Timing...................................................................24  
Torque ..............................................................6–11  
Trigger ............................................................37–41  
R
Receptacle............................................... 16, 44, 45  
Regulatory Compliance ................................. 46, 47  
Resolution............................................................ 32  
RMA..................................................................... 49  
V
Video Mode ....................................................16, 34  
Voltage .........................................34, 37–41, 46, 47  
S
W
Self-Tapping Screw ................................. 1, 4, 6–11  
Serial Configuration ............................................. 22  
Serial Label............................................................ 5  
Service..................................................... 49, 53, 54  
Shock....................................................... 33, 44, 45  
Signals......................................... 15–28, 34, 37–41  
Snapshot Mode.............................................. 16, 34  
SwiftDecoder™...................................................... 1  
Warranty...............................................................49  
Watt(s)..................................................................46  
Weight ..................................................................33  
Window  
coatings .............................................................13  
materials............................................................13  
specifications.....................................................13  
transmission.......................................................13  
T
Targeting.................................................... 4, 37–41  
Temperature ........................................................ 33  
52  
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Contact Information  
The Americas (TA)  
Germany  
Guangzhou Sales Office  
Tel: 86-20-38823476  
USA  
Tel: 49-89-89019-0  
Fax: 86-20-38823477  
Fax: 49-89-89019-200  
Email: [email protected]  
Email: [email protected]  
Tel: 800.436.3876 (Customer Service)  
866.460.8033 (Customer Support)  
888.633.3762 (Technical Support)  
Fax: 856.228.6673 (Sales)  
Beijing Sales Office  
Italy  
Tel: 010-82253472/84583280  
Fax: 010-82253648/84583102  
Email: [email protected]  
856.228.1879 (Marketing)  
Tel: +39 0 51 6511978  
856.228.0653 (Legal/Finance)  
Fax: +39 0 51 6521337  
Email: [email protected]  
Chengdu Sales Office  
Brazil  
Tel: 028-66135066/86786348  
Fax: 028-86787061  
Poland  
Tel: 55.11.5185.8222  
Email: [email protected]  
Fax: 55.11.5185.8225  
Tel: +48 (22) 545 04 30  
Email: [email protected]  
Fax: +48 (22) 545 04 31  
Email: [email protected]  
Hong Kong  
Mexico  
Tel: 852-2331-9133 (main line)  
Fax: 852-2511-3557  
Russia  
Tel: 55.5365.6247  
Fax: 55.5362.2544  
Tel: +7 (495) 737 7273  
India  
Email: [email protected]  
Fax: +7 (495) 737 7271  
Email: [email protected]  
India Sales Office  
North America  
Tel: +91 80 4125 6718  
Fax: +91 80 4125 6719  
Email: [email protected]  
Spain  
Tel:  
856.537.6400  
866.460.8033 (Customer  
Tel: +34 913 272 400  
888.633.3762 (Technical  
Fax: +34 913 273 829  
Japan  
Fax: 856.537.6474  
Email: [email protected]  
Email: [email protected]  
Tel: 81-3-3839-8511  
United Kingdom  
Fax: 81-3-3839-8519  
South America (Outside Brazil)  
Email: [email protected]  
Tel: +44 (0) 1256 365900  
Fax: +44 (0) 1256 365955  
Email: [email protected]  
Tel: 55.11.5182.7273  
Fax: 55.11.5182.7198  
Korea  
Email: [email protected]  
Korea Sales Office  
Asia Pacific  
Tel: (82) 2-6205-5379  
Omniplanar, Inc.  
(82) 11-9363-5379 (mobile)  
Fax: (82)-2-3444-3980  
Email: [email protected]  
Australia  
Tel: 856.374.5550  
Fax: 856.374.5576  
Tel: 1 800 99 88 38  
Email: [email protected]  
Fax: +61 2 8916-6471  
Email: [email protected]  
Singapore  
NOVODisplay  
Tel: (65) 6842-7155  
China  
Fax: (65) 6842-7166  
Tel: 856.537.6139  
Email: [email protected]  
Fax: 856.537.6116  
Email: [email protected]  
Tel: 86-21-58356616  
86-21-58358830  
Thailand  
Fax: 86-21-58358873  
Email: [email protected]  
Europe, Middle East and Africa  
Tel: +662-610-3787  
Fax: +662-610-3601  
France  
Suzhou Sales Office  
Email: [email protected]  
Tel: 86-512-67622550  
Fax: 86-512-67622560  
Email: [email protected]  
Tel: +33 (0) 1 48.63.78.78  
Fax: +33 (0) 1 48.63.24.94  
Email: [email protected]  
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Product Service and Repair  
North America  
Suzhou Sales Office  
European Repair Center  
Tel: 800.436.3876 (Customer Service)  
866.460.8033 (Customer Support)  
888.633.3762 (Technical Support)  
Fax: 856.228.6673 (Sales)  
Tel: 86-512-67622550  
Fax: 86-512-67622560  
Email: [email protected]  
Tel: +34 913 751 249  
Fax: +34 913 270 437  
Email: [email protected]  
54  
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Honeywell Scanning and Mobility  
90 Coles Road  
Blackwood, NJ 08012-4683  
00-05325 Rev F  
March 2009  
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