Metrologic MS6720 User manual

METROLOGIC
®
INSTRUMENTS, INC.
MS6720 Hand-Held Laser Scanner
Installation and User’sGuide

ii
LOCATIONS
CORPORATE HEADQUARTERS
NORTH AMERICA
EUROPEAN, MIDDLE EAST & AFRICAN
HEADQUARTERS
USA, NEW JERSEY GERMANY, MUNICH
Metrologic Instruments, Inc. Metrologic Instruments GmbH
Tel: 1-800-ID-METRO Fax: [phone] Tel: [phone] Fax: [phone]
Email: [e-mail] Email: [e-mail]
SOUTH AMERICA, BRAZIL SÃO PAULO GERMANY, MUNICH
Metrologic do Brasil Ltda. Metrologic Instruments GmbH
Tel: [phone] Fax: [phone] Tel: [phone] Fax: [phone]
Email: [e-mail] Email: [e-mail]
SOUTH AMERICA, OUTSIDE BRAZIL SÃO PAULO ITALY, BOLOGNA
Metrologic South America Metrologic Instruments Italia srl
Tel: [phone] Fax: [phone] Tel: [phone] Fax: [phone]
Email: [e-mail] Email: [e-mail]
ASIA, SINGAPORE FRANCE, PARIS
Metrologic Asia (Pte) Ltd Metrologic Eria France SA
Tel: [phone] Fax: [phone] Tel: [phone]
Email: [e-mail] Fax: [phone]
Email: [e-mail]
CHINA, SUZHOU
Metro Technologies Co., Ltd. SPAIN, MADRID
Tel: [phone] Fax: [phone] Metrologic Eria Ibérica, SL
Email: [e-mail] Tel: [phone] Fax: [phone]
Email: [e-mail]
Metro Sales Office
Tel: [phone] Fax: [phone] Metrologic Europe Repair Center (MERC)
Email: [e-mail] Metrologic Eria Ibérica, SL
Tel: [phone] Fax: [phone]
JAPAN, TOKYO
Metrologic Japan Co., Ltd. UNITED KINGDOM, BASINGSTOKE
Tel: [phone] Fax: [phone] Metrologic Instruments UK Limited
Email: [e-mail] Tel: [phone]
Fax: [phone]
Email: [e-mail]
RUSSIA, MOSCOW
Metrologic Russia
Tel: [phone] Fax: [phone]
Email: [e-mail]
Copyright
© 2003 by Metrologic Instruments, Inc. All rights reserved. No part of this work may be reproduced, transmitted, or stored in
any form or by any means without prior written consent, except by reviewer, who may quote brief passages in a review, or
provided for in the Copyright Act of 1976.
Products and brand names mentioned in this document are trademarks of their respective companies.
.

iii
TABLE OF CONTENTS
Introduction................................................................................................................1
Scanner and Accessories............................................................................................2
Quick Start .................................................................................................................3
Operational Test.........................................................................................................4
MS6720 Installation: Powered by External Power Supply ........................................5
MS6720 Installation: Powered by Host Device .........................................................6
MS6720-47 Keyboard Wedge Installation to the PC .................................................8
MS6720 Optional Stands ...........................................................................................9
Scanner Parts............................................................................................................11
Audible Indicators....................................................................................................12
Failure Modes ..........................................................................................................13
Visual Indicators......................................................................................................14
Scanner Labels.........................................................................................................15
Maintenance.............................................................................................................15
Depth of Field Specifications
Normal Depth of Field.........................................................................................16
Short Depth of Field ............................................................................................17
Extended Depth of Field......................................................................................18
Optional Depth of Field.......................................................................................19
Normal Depth of Field.........................................................................................20
Short Depth of Field ............................................................................................20
Scan Pattern Specifications
Projection Axis ....................................................................................................21
Omnidirectional Scan Volume.............................................................................21
Cross-Sectional Scan Pattern...............................................................................22
Troubleshooting Guide ............................................................................................23
Applications and Protocols ......................................................................................28
Appendix A
Design Specifications ..........................................................................................29
Appendix B
Default Settings ...................................................................................................31

iv
TABLE OF CONTENTS
Appendix C
Pin Assignments for the Coil Cable.....................................................................35
Pin Assignmentsf or the MCA951.......................................................................36
Pin Assignmentsf or the MS6720-47 Keyboard Wedge Cable............................37
Appendix D
Limited Warranty ................................................................................................38
Appendix E
Notices.................................................................................................................39
Appendix F
Patents .................................................................................................................41
Index ........................................................................................................................42

1
INTRODUCTION
The MS6720 is the first laser bar code scanner to truly bridge the gap
between omnidirectional fixed projection and hand-held scanners. It
incorporates fixed projection performance and patented 20-line scan pattern
into the comfortable, ergonomic styling of our popular hand-helds.
The MS6720 utilizes a unique, patented infrared sensor and control scheme
for hands-free projection scanning and fatigue reduced hand-held operation.
Whether operators choose to present small items to the scanner or transport
the lightweight scanner to bulkier items, the compact size and comprehensive
scan pattern make the MS6720 the perfect choice for many applications.
For increased flexibility there are three optional stands available. The
stationary stand is ideal for applications where the MS6720 is being used as
a hand-held scanner. Or if a customer application requires more in stand
scanning Metrologic’s adjustable stand provides 7 rotational and 9 tilting
positions while still providing the option for hand-held scanning. If
countertop space is an issue there is an optional bracket for a wall mounting
that can be used with the adjustable stand cup.
The MS6720 features both short-range and long-range activation, user-
friendly programming, reliability and versatility. Operators are sure to
appreciate the convenience and flexibility of the MS6720.
Scanner Interface
MS6720-9 OCIA (OCIA)
MS6720-11 IBM (46XX)
MS6720-14 RS-232 (232)
MS6720-15 Light Pen Emulation (LTPN)
MS6720-47 Keyboard Wedge (KBW)

2
SCANNER AND ACCESSORIES
The following is a list of parts that may or may not be included in a
MS6720 kit.
•MS6720 Hand-Held Laser Scanner
•AC to DC Power Transformer – Regulated 5VDC @ 300 mA output
•One of the following options may be included:
•120V United States [MLPN 46-46010]
•220V Continental European [MLPN 46-46009]
•240V United Kingdom [MLPN 46-46008]
•Stand
•One of the following options may be included:
•Stationary Stand [MLPN 45-45429]
•Adjustable Stand [MLPN 45-45967]
•Wall Mounting Kit [MLPN 45-45968]
•Installation and User’s Guide [MLPN 00-02368]
•ScanSelect®Scanner Programming Guide [MLPN 00-02186] or
MetroSet2 CD
RS-232, Light Pen, some OCIA and some 46xx
•MCA (Metrologic Connector Adapter) [MLPN MCA951]
•For direct connect application (No Power Transformer)
4 position MCA ground jumper [MLPN 51-51191]
Keyboard Wedge Scanners:
•Adapter Cable with a 5-pin DIN male connector on
One end and a 6-pin mini DIN female connector
On the other [MLPN 45-45927]
•For direct connect application (No Power Transformer)
4 position direct power jumper [MLPN 52-52332]
Other items may be ordered for the specific protocol being used.
To order additional items, contact the dealer, distributor or call Metrologic’s
Customer Service Department at 1-800-ID-METRO or 1-800-436-3876.

3
QUICK START
1. Plug in the scanner. The red LED will come on, the green LED will
flash once and the unit will beep simultaneously.
2. The scanner is shipped from the factory programmed with default
settings. To configure the MS6720 scanner to meet the host system’s
specific needs, refer to the ScanSelect®Programming Guide
[MLPN 00-02186] or the help files provided with MetroSet2 for
instructions on how to enter the program mode and to select the
appropriate bar codes.
Note: Any time the Load Defaults bar code is scanned the MS6720 is
configured for an RS-232 interface. If a RS-232 is not being
used, scan at least one other bar code to enable Keyboard
Wedge, OCIA, Light Pen or 46xx.

4
OPERATIONAL TEST
If the scanner is to receive power from an external power supply*, test the
scanner before it is connected to the host system.
Keyboard Wedge Scanners:
1. Plug one end of the coil cable into the keyboard connector on the PC.
Then plug the keyboard connector into the other end of the coil cable.
Plug in the external transformer.
2. Check the AC input requirements of the power supply to make sure the
voltage matches the AC outlet. Connect AC power to the transformer.
3. Both LEDs come on together along with the beep (the green LED only
flashes).
RS-232, Light Pen, OCIA and 46xx scanners:
1. Plug the scanner’s coil cable into the MCA (Metrologic Connector
Adapter).
2. Check the AC input requirements of the power supply to make sure the
voltage matches the AC outlet. Plug the power supply into the MCA
and the appropriate AC outlet. The outlet should be installed near the
equipment and be easily accessible.
3. Both LEDs come on together along with the beep (the green LED only
flashes).
The scanner can be powered in two ways:
•by an External Power Supply* or
•by the Host Device** i.e. the PC for the MS6720 with a Built-
in PC Keyboard Wedge interface.
Caution:
*To maintain compliance with applicable standards, all circuits connected to the scanner must meet the
requirements for SELV (Safety Extra Low Voltage) according to EN 60950.
**To maintain compliance with standard CSA C22.2 No. 950/UL 1950 and norm EN 60950, the power
source should meet applicable performance requirements for a limited power source.

5
MS6720 INSTALLATION: POWERED BY EXTERNAL POWER SUPPLY
1. Turn off the host system.
2. If using a communication cable, connect the cable to the correct port on
the host device and the MCA (Metrologic Connector Adapter). If the
host device is an IBM compatible PC with a male 9-pin serial port,
connect the MCA to the port.
3. Plug the scanner’s coil cable into the MCA.
4. Check the AC input requirements of the power supply to make sure the
voltage matches the AC outlet. The outlet should be near the
equipment and be easily accessible. Plug the power supply into the
MCA and the AC outlet.
5. Turn on the host system.
Note:
a. When the scanner first receives power, the red LED will come
on, the green LED will flash once and the unit will beep
simultaneously.
b. Plugging the scanner into the serial port of the PC does not
guarantee that scanned information will appear at the PC. A
software driver and correct configuration setting are also
required for proper communication to occur.
Caution:
To maintain compliance with applicable standards, all circuits connected to the scanner must meet the
requirements for SELV (Safety Extra Low Voltage) according to EN 60950.
Tab
Down
10 Position Modular
Connector at the end of
the Coil Cable
1
10
5
19
6
Female
9 Pin
MCA

6
MS6720 INSTALLATION: POWERED BY HOST DEVICE
If the host system supplies +5VDC power to the scanner, reposition the
internal jumper within the MCA (Metrologic Connector Adapter) before
connecting the scanner to the host device. In addition, plug the 4 position
ground jumper into the power supply connector located on the side of the
MCA.
1. Make sure the MCA is not connected to the
scanner, communication cable or host and
unfasten the case.
2. Reposition the shunt on JP1 to pins 1 and 2
and close the case.
The factory setting of jumper 1 (JP1) is on pins 2
and 3. To direct power for the scanner from the
host device, position the jumper on pins 1 and 2.
Pin 1 of the MCA provides a connection point
for various ground/shield ground configurations
on different Metrologic products. Internal
jumper JP2 of the MCA gives end users the
option of changing pin 1 of the DB9 into a no
connect (NC). Simply remove the jumper from
the pins, then pin 1 of the DB9 becomes an
open/no connect pin.
JP2 should ALWAYS be in place for OCIA
applications.
Continued on next page
Caution:
*To maintain compliance with applicable standards, all circuits connected to the scanner must meet the
requirements for SELV (Safety Extra Low Voltage) according to EN 60950.
**To maintain compliance with standard CSA C22.2 No. 950/UL 1950 and norm EN 60950, the power
source should meet applicable performance requirements for a limited power source.
Top View of Header, Pins, and Jumper
HOST
JP1
Regulated +5VDC
Power Supply
(Factory Setting)
JP1
+5VDC Host
Power
HOST
1
3
1
3
Jumper removed
for open/no
connect pin
Factory Setting
JP2
Top View of Pins, and Jumper

7
SCANNER INSTALLATION: POWERED BY HOST DEVICE (CONTINUED)
3. Plug the 4 position ground jumper
into the power supply connector.
4. Turn off the host system
5. If using a communication cable,
connect the cable to the correct port
on the host device and the MCA.
If the host device is an IBM
compatible with a male 9-pin serial
port, connect the MCA to the port.
There is an optional cable
(MLPN 51-51236) that is available for
IBM PC applications where the MCA
will not fit at the back of the
computer.
6. Plug the scanner’s coil cable into the
MCA.
7. Turn on the host system.
Caution:
To maintain compliance with applicable standards, all circuits connected to the scanner must meet the
requirements for SELV (Safety Extra Low Voltage) according to EN 60950.
**To maintain compliance with standard CSA C22.2 No. 950/UL 1950 and norm EN 60950, the power
source should meet applicable performance requirements for a limited power source.
Ground
Jumper
(direct)
Communication Cable (Optional)
MCA
Coil Cable
MS6720
Host
5
19
6
MCAFemale
9-pin D
Power Supply
Connector

8
MS6720-47 KEYBOARD WEDGE INSTALLATION TO THE PC
1. The “Y” coil cable is terminated with a 5-pin DIN female connector on
one end, and a 6-pin mini DIN male on the other. Also included with
the MS6720 is an adapter cable with a 5-pin male DIN on one end and
a 6-pin female mini DIN on the other to mate to a specific keyboard.
According to the termination required, connect the appropriate end of
the adapter cable to the coil cable, leaving the necessary termination
exposed for connecting to the keyboard and the keyboard port on
the PC. Refer to Appendix C for pin assignments.
2. If the PC is on, exit the application and turn the PC off.
3. Disconnect the keyboard from the PC.
4. Plug one end of the coil cable into the keyboard connector on the PC.
Then plug the keyboard connector into the other end of the coil cable.
Plug in the external transformer. Refer to the manufacturer’s
recommendation below. Connect AC power to the transformer.
5. Power up the PC.
Manufacturer’s Recommendation:
Metrologic recommends the use of an external power supply with MS6720-47
Keyboard Wedge applications. Powering** the MS6720-47 directly from the
computer keyboard connector could interfere with the operation of the scanner or
the computer. Not all computers supply the same current through the keyboard
port, this explains why a scanner would work on one computer and not another.
Caution:
To maintain compliance with applicable standards, all circuits connected to the scanner must meet the
requirements for SELV (Safety Extra Low Voltage) according to EN 60950.
)
**To maintain compliance with standard CSA C22.2 No. 950/UL 1950 and norm EN 60950, the power
source should meet applicable performance requirements for a limited power source.
6M
Transformer (External)
MS6720
Host
Power Jumper (Direct)
Adapter
“Y” Coil Cable 5F

9
MS6720 OPTIONAL STANDS
Adjustable Stand [MLPN 45-45967] Contains:
A. Tilt/Swivel Cup Assembly
[MLPN 45-45967A]
B. Weighted Base Assembly
[MLPN 45-45967B]
1B Weighted Base
[MLPN 36-36765]
2B. Rotating Base
[MLPN 45-45577]
3B. Wood screws, #10 Flat Head
[MLPN 18-18857]
Adjustable Stand Free-Standing Installation [Kit #45-45967]
Step 1
Locate the FRONT mark on the
weighted base assembly
[MLPN 45-45967B]
Step 2
Align the tilt/swivel cup assembly
[MLPN 45-45967A] with the weighted
base assembly [MLPN 45-45967B].
Step 3
Press down firmly on the tilt/swivel
cup assembly until it snaps into place
on the weighted base.

10
MS6720 OPTIONAL STANDS
Adjustable Stand Hard Mount Installation [Kit #45-45967]
Step 1
Remove the four screws holding the rotating base
[MLPN 45-45577] to the weighted base
[MLPN 36-36765].
Step 2
Note the position of the FRONT mark on the
rotating base then use the rotating base as a guide to
drill four pilot holes (Hard Wood - #31 drill or Soft
Wood -#43 drill) in the countertop.
Step 3
Secure the rotating base [MLPN 45-45577] to the
countertop with the four #10 wood screws
[MLPN 18-18857] provided.
Step 4
Align the tilt/swivel cup assembly
[MLPN 45-45967A] with the rotating base
[MLPN 45-45577] as indicated below.
Step 5
Press down firmly on the tilt/swivel cup assembly
until it snaps into place over the rotating base.
Additional stand options available for purchase:
Wall Mounting Kit [mlpn 45-45968] Stationary Stand [MLPN 45-45429]
for use with the adjustable stand

11
SCANNER PARTS
Green and Red LED
When the red led is on, this indicates that the laser is on. When the green LED
flashes on, the scanner has read a bar code successfully. When the green light turns
off, communication to the host is complete. The green LED blinks while the
scanner is waking up from an IR sensor timeout. The LED’s are also used as
diagnostic indicators and mode indicators.
Output Window
Laser light emits from this aperture.
Adjustable stand
Designed to provide an adequate distance for scanning between the scanner face and
counter at all times. When fully tilted, the face of the scanner remains a full five
inches from the counter. Refer to page 10 for available kits.
Cable
This cable is terminated with a 10-pin modular connector, which attaches to the
MCA951. The Keyboard Wedge unit has a “Y” coil cable terminated with a 5-pin
female on one end, a 6-pin male and a 4-pin locking connector for power input
(power jumper). An adapter is included with a 5-pin male DIN on one end and a 6-
pin female mini DIN on the other to mate to a specific keyboard. Refer to Appendix
C for pin assignments.
Green and Red LED
Cable
Output Window
A
djustable Stand

12
AUDIBLE INDICATORS
When the MS6720 scanner is in operation, it provides audible feedback.
These sounds indicate the status of the scan and scanner. Four settings are
available for the tone of the beep. To change the tone, refer to the
ScanSelect®Programming Guide [MLPN 00-02186] or the help files
provided with MetroSet2.
One Beep
When the scanner first receives power, both LEDs come on
together along with a beep (the green LED only flashes).
After the scanner performs this startup sequence, the scanner
is ready to scan.
When the scanner successfully reads a bar code, the green light
will flash and beep once (if programmed to do so). If the
scanner does not beep once and the green light does not flash,
then the bar code has not been successfully read.
Razzberry Tone
This tone is a failure indicator. Refer to failure modes page 13.
Three Beeps - after power up
When entering the program mode, the green LED will flash
while the scanner simultaneously beeps three times. The
green LED will continue to flash until the unit exits program
mode. Upon exiting program mode, the scanner will beep
three times and the green LED will stop flashing. When
configured, 3 beeps can also indicate a communications
timeout during normal scanning mode.

13
FAILURE MODES
Flashing Red and One Razzberry Tone
This indicates the scanner has experienced a laser
subsystem failure. Return the unit for repair at an
authorized service center.
Flashing Red and Green and Two Razzberry
Tones
This indicates the scanner has experienced a motor
failure. Return the unit for repair at an authorized service
center.
Continuous Razzberry Tone with both LEDs off
If, upon power up, the scanner emits a continuous razz-
berry tone, then the scanner has an electronic failure.
Return the unit for repair at an authorized service center.
Three Beeps - on power up
If the scanner beeps 3 times on power up the non-volatile
memory, which holds the scanner configuration, has
failed. Return the unit for repair at an authorized service
center.

14
VISUAL INDICATORS
There are a red LED and a green LED on the scanner. When the scanner is on, the
flashing or stationary activity of the LEDs indicates the status of the scan and scanner.
No Red or Green LED
There are two reasons why the LEDs will not be illuminated:
1. If the scanner is receiving power and the LEDs are not on, then
the scanner has been dormant for a specified time and the laser
has turned off. To reactivate the unit, pass an object
through the scan field.
2. If the scanner is not receiving power from the host or
transformer, then the LEDs will not be on.
Steady Red
When the laser is on, the red LED is also on. The red LED will
remain on until the scanning period has expired.
Steady Red and Single Green Flash
When the scanner successfully reads a bar code, the green LED will
flash then beep once. If the green LED does not flash or the scanner
does not beep once, then the bar code has not been successfully
read.
Steady Red and Steady Green
After a successful scan, the scanner transmits the data to the host
device. If the host is not ready to accept the information, the
scanner’s green LED will remain on until the data can be
transmitted. The red LED will turn off when the scanning period
expires.
Steady Red and Flashing Green
This indicates the scanner is in program mode. A razzberry tone
indicates that an invalid bar code has been scanned in this mode.
Steady Green
This indicates the scanner may be waiting for communication from
the host.
Flashing Green
This indicates the scanner is waking up from a dormant state in
response to an IR sensor activation.