function, or design.
Symbol does not assume any product liability arising out of, or in connection with, the
application or use of any product, circuit, or application described herein.
No license is granted, either expressly or by implication, estoppel, or otherwise under
any patent right or patent, covering or relating to any combination, system,
apparatus, machine, material, method, or process in which Symbol products might
be used. An implied license exists only for equipment, circuits, and subsystems
contained in Symbol products.
Symbol and the Symbol logo are registered trademarks of Symbol Technologies, Inc.
Other product names mentioned in this manual may be trademarks or registered
trademarks of their respective companies and are hereby acknowledged.
Symbol Technologies, Inc.
One Symbol Plaza
Holtsville, N.Y. 11742-1300
The VRC 6940 is a rugged computer terminal that can be installed
in a vehicle or mounted on a wall or workbench. It allows you to
gather information quickly, easily and accurately using the
keyboard or an attached scanner. The VRC 6940 transfers the
information to a base station Access Point (AP) through a Symbol
Spectrum24
information to a host computer for processing.
VRC 6940 terminals can run a variety of software applications. For
help in using an application at your facility, refer to the application
documentation or ask your System Administrator.
About This Guide
This manual describes how to use a VRC 6940 terminal that has
been installed in a vehicle or mounted on a wall or workbench.
Specific topics include:
•Parts of a VRC 6940 Terminal on page 2
•Basic Operation on page 3
•Modifier Keys: SHIFT, FUNC and CTRL on page 4
•Resetting the Terminal on page 4
•Entering Data on page 5
•Charging the Internal Battery on page 6
•Moving to a Different Power Source on page 6
•Troubleshooting on page 7
•Installing a VRC 6940 Terminal on page 8.
This guide does not describe how to download or install
applications, and it does not provide instructions for using specific
applications. For more technical information on the VRC 6940
terminal, see the VRC 6940 Product Reference Guide (Symbol
part number 72-37641-XX).
You can order these optional accessories from Symbol:
•Scanner cable
•RS-232 cable
•Primary antenna
•Vehicle-mounted antenna
•Spectrum24 PCMCIA radio card
•AC universal power supply
•AC
cable.
Basic Operation
Turning the Terminal On
1. Press the ON/OFF
key located at the
top right corner of
the alpha section of
the keyboard.
2. If the terminal has
been configured for
your facility, it displays a login screen or main application screen.
3. Follow the instructions for your facility’s applications.
Suspending or Turning Off the Terminal
To suspend the terminal, press the ON/OFF key. The screen goes
dark, and the terminal appears to be off. However when you press
the ON/OFF key again, the terminal resumes your previous
session.
Forcing the Terminal into Suspend
If the terminal does not go into suspend when you press the ON/
OFF key, you can force it into suspend. To do this, press and hold
the ON/OFF key for 15 seconds, or until the display goes dark.
ON/OFF key
SHIFT keyFUNC key
CTRL key
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VRC 6940 Terminal
Turning the Terminal Off
In normal operation, you will not turn the terminal off: you will place
it into suspend. The terminal only turns off if you have:
•disconnected the power cable, AND
•allowed the internal battery to run down.
For more information, see Charging the Internal Battery on page 6.
Modifier Keys: SHIFT, FUNC and CTRL
SHIFT, FUNC, and CTRL are modifier keys that you can use to
generate a special character or function (see Basic Operation on
page 3). For example, you might press FUNC, J to brighten the
display. To do this you would:
1. Press and release the FUNC key.
2. Press and release the J.
3. The display brightens, and the keyboard returns to normal
functioning.
Adjusting Brightness
TaskKey SequenceComment
Brighten the display.
Darken the display. FUNC, I
Toggle keyboard
backlight on or off.
FUNC, JRepeat the key sequence to
FUNC, KNot all terminals include a key-
reach the desired brightness
level. There are seven brightness levels.
board backlight option.
Resetting the Terminal
You may need to reset a terminal that has stopped responding to
keystrokes or to the ON/OFF key, or if it has been forced into
suspend. To reset a terminal:
1. Press and hold both the SHIFT key and the L key.
2. Press and release the ON/OFF key.
3. Release the SHIFT and L keys.
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The terminal restarts and you can log in to an application. If you
have problems opening an application after resetting the terminal,
contact your System Administrator.
Note:If you reset a terminal, you may lose any unsaved data.
Entering Data
You can enter data into
a VRC 6940 terminal by
using the keyboard or
an attached scanner
Tips for Using the Keyboard
•Press only one key at a time. Pressing two or more keys at
the same time can cause an error.
•Press the keys in correct sequence. When key sequences
are listed for an application, press the keys one at a time in
the order they are listed.
•Auto-repeat feature. Some applications use the auto-re-
peat feature of the keyboard. If they do, when you press and
hold a key, the key will repeat until you release it.
•Application functions. The keyboard may have different
functions depending on the application you are using. Refer
to your application documentation for more information.
Attaching a Scanner
1. Press the ON/OFF key to suspend the terminal.
2. Fit the scanner cable into the Scanner Connector on the rear
of the terminal.
.
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VRC 6940 Terminal
Back of terminal
Scanner
Connector
3. Press the ON/OFF key to power the terminal on.
4. For information on using the scanner, consult the documentation that came with the scanner.
Charging the Internal Battery
The VRC 6940 has an internal battery that provides power and
saves your session if there is a temporary fluctuation,
disconnection, or interruption in the unit’s main power supply. The
internal battery recharges itself from the terminal’s main power
supply. You cannot use it to operate the unit. For more information,
see Installation and the Internal Battery on page 17.
Moving to a Different Power Source
To move a VRC 6940 terminal from one location to another:
1. Save all data you are working with, and close all applications.
2. Press the ON/OFF key to suspend the terminal.
3. Make sure a power source is ready in the new location.
4. Unplug the external power cable from the Power Connector
on the back of the terminal.
5. Remove the terminal from its current mounting.
6. Move the terminal to the new location and mount it.
7. Plug the external power cable into the Power Connector.
For more information on installation and power, see page 8.
Note:If you unplug the power cable, and the internal battery
is not charged, the terminal may shut off.
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Troubleshooting
ProblemAction
The terminal will not
start.
The start-up process
fails.
Application does not
respond.
Scanner laser works
but does not read bar
codes.
Scanner does not
operate.
Make sure that the terminal is connected to a power
source. If the external power cable has come unplugged,
plug it back in and press the ON/OFF key to restart the terminal.
If the internal battery was charged, the terminal will maintain your session until you reconnect it to the power source
and restart it. If the internal battery was not fully charged,
you may have lost any unsaved data.
If the terminal is connected to a vehicle battery as a power
source, check the vehicle battery. If it is depleted (dead),
replace the vehicle battery.
The terminal may be out of range of the Access Point (AP)
and unable to communicate with the host computer. Move
closer to the AP.
If either of these messages appears, contact your System
Administrator:
Boot server doesn’t exist.
Boot server not configured for this
terminal.
The terminal may not be connecting to the Access Point
(AP). Applications function until they need to transmit to
the AP, then they stop responding. Contact your System
Administrator.
The bar code on the label may not be clearly printed. Try
scanning another label of the same product, or type in the
bar code data manually.
The scanner window may be dirty. Clean it with a soft, dry
cloth moistened with an ammonia-based glass cleaner.
Make sure the scanner is properly connected to the terminal’s Scanner Connector. Then restart t he terminal with the
scanner connected.
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VRC 6940 Terminal
ProblemAction
Power fault.This message may appear if the terminal’s last shutdown
Terminal suddenly
shuts off or goes into
suspend.
was caused by power failure. A power failure can be
caused by:
• removing the terminal from the power source
• removing the vehicle battery
• sudden main battery failure
If the internal battery is charged, it can maintain session
data for up to 72 hours. You can replace the main power
supply and restart the terminal without losing data.
If the internal battery is not fully charged, the terminal may
not be able to maintain session data, and you will lose any
unsaved data. To recharge the internal battery, keep the
main power connected to the unit for 48 hours.
The terminal may be in suspend mode. Press the ON/OFF
key to reactivate it.
Check the main power supply and external power cable. If
the cable is unplugged, plug it back in and press the ON/
OFF key to restart the terminal.
If the terminal loses its connection with its main power
source, it goes into suspend. The internal battery can
maintain session data for up to 72 hours. However if the internal battery is not fully charged, the terminal may not
maintain your session, and you may lose unsaved data.
For more information, see Charging the Internal Battery on
page 6 and Installation and the Internal Battery on page
17.
Installing a VRC 6940 Terminal
This section describes how to install a VRC 6940 terminal into a
vehicle or onto a wall or workbench. Please read all of these
instructions before you begin.
WARNING
A properly trained technician must perform the installation.
Improper installation can damage your vehicle.
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Equipment Required
Vehicle Mounting
•VRC 6940 terminal.
•an External DC power cable (supplied with terminal).
•minimum of two 3/8” bolts with self-locking nylon nuts.
•a drill with a 7/16” drill bit.
•7/16” hex wrench.
•a connector for terminating the External DC power cable. Select one that mates with your vehicle’s power supply.
•primary or external antenna (optional).
Wall or Workbench Mounting
•VRC 6940 terminal.
•AC universal power supply (Symbol p/n 50-14001-006).
•AC line cable (Symbol p/n 23844-00-00).
•DC power cable (Symbol p/n 25-39385-01).
•minimum of two 3/8” bolts with self-locking nylon nuts.
•a drill with a 7/16” drill bit.
•7/16” hex wrench.
•primary or external antenna (optional).
Hardware Installation
The physical requirements of the work area affect where the
terminal is placed. There are different installation options
depending on where the terminal is located. Illustrations on pages
12 and 13 show a terminal mounted on a vehicle, a terminal
mounted on a wall, and a terminal mounted on a workbench.
Caution: Do not install a VRC 6940 terminal in a location that af-
fects vehicle safety or driveability.
To install VRC 6940 mounting bracket:
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VRC 6940 Terminal
1. Carefully separate the bracket from the terminal by unscrewing the two black bracket knobs.
2. Prepare a mounting location.
a. Select a location to mount the terminal. The terminal’s
bracket already has bolt holes. Use these holes as a template to mark bolt hole locations.
b. Drill two holes with a 7/16" drill bit.
Note:Ensure bracket is:
• secured along its length to a firm, flat surface that
can support the weight of the terminal - on a vehicle,
wall, or workbench
• secured with a minimum of two 3/8" diameter bolts
and nylon self-locking nuts
• mounted in such a way that the installation does not
deform the base of the bracket
• easy for the end user to see and reach when the terminal is mounted.
3. Position and install the bracket onto the mounting surface.
Fasten the bracket using a minimum of two 3/8" bolts and
self-locking nuts.
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4. After the bracket is installed measure its width as shown in
the figure below. The distance between the open ends of the
bracket must be 14.17" +/-.06".
Caution: Failure to comply with the bracket installation width re-
quirement results in improper bracket installation and
premature failure of vibration isolators.
5. Attach the terminal to the bracket with the two bracket knobs.
6. Adjust the angle of the terminal and tighten the bracket
knobs.
7. Optional: attach a primary antenna to the connector at the
top of the terminal. To attach the antenna:
a. Place the metal end of the antenna onto the connector.
b. Line the posts up with the connector and press down.
c. Twist the bottom ring clockwise to lock it into position.
Back of Terminal
Antenna Connector
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VRC 6940 Terminal
8. Optional: install a vehiclemounted antenna. Some-
Antenna
times you can improve wireless communication by
mounting an external anten-
Coaxial cable
na onto the vehicle. Symbol
has several different external
antennas available. Contact
your Support Representative
for more information.
To connect an external vehicle-mounted antenna:
a. Secure the external an-
tenna to an appropriate
location on the vehicle.
b. Connect one end of a coaxial cable to the terminal’s An-
tenna Connector. Connect the other end to the vehiclemounted antenna. Make the coaxial cable as short as
possible to minimize signal loss.
Providing Power: Vehicle Installations
VRC 6940 terminals can be powered by:
•12V or 24V gas-powered vehicles
•battery-powered vehicles, up to 60 volts
To provide power to a vehicle-installed VRC 6940:
1. Locate your vehicle’s power source. Always connect a VRC
6940 terminal to a continuous or unswitched power source.
Note:The ideal location for connecting a VRC 6940 External
DC power cable would be a fused power source on the
vehicle’s power distribution panel. If no fused power
source is available, you can connect the terminal directly to a vehicle battery. In this case, Symbol recommends that you use an in-line fuse holder and 5A slow-
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Quick Reference
blow fuse. The fuse protects your vehicle from an electrical short on the power cable.
2. Prepare the External DC power cable. One end of the exter-
nal DC power cable fits into the terminal’s DC Power connector. The other end has no connector.
Cable End
to be
prepared
Plug in to the DC Power
connector on the terminal
a. Route the External DC power cable from the terminal lo-
cation to the connection point for your vehicle’s power
source.
Caution: The means of routing and securing the External DC
power cable from the terminal to the vehicle power
source is extremely important. Hazards associated with
improper wiring can be severe.
To avoid unintentional contact between the wire and
any sharp edges, provide the cable with proper bushings and clamping where it passes through openings. If
the wire is subjected to sharp surfaces and excess engine vibration, the wiring harness insulation can wear
away, causing a short between the bare wire and chassis. This can start a fire.
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VRC 6940 Terminal
b. Install connectors on the two wire ends with a connector
that matches your vehicle’s requirements. See the Installation Note below.
Connect the red wire to the vehicle power source. Connect the black wire to a vehicle ground wire or chassis
ground.
Note:How the cable terminates depends on your vehicle. If
your vehicle has a power output connector, then attach
a mating connector to the end of the power cable. You
may be able to connect to a fuse panel with a commercially available connector. If your vehicle has no power
output connector, attach a ring terminal (for a battery
post) or blade terminal connector (for a fuse panel).
Consult your vehicle Owner’s Manual for information
on how to access your vehicle’s power supply.
c. Connect the External DC power cable to your vehicle
power source.
3. Insert the terminal end of the External DC power cable into
the terminal’s Power Connector. Align the red dot on the end
of the power cable with the red dot on the Power Connector.
WARNING
A Lead Acid battery can leak Hydrogen gas. A spark anywhere near the battery can cause it to explode. Always make
your final connection to power as far away from the battery
as possible, i.e., connect the power cable to the battery first,
connect it to the terminal.
then
Providing Power: Wall or Workbench Installations
For wall or bench-mounted terminals, or for operating a terminal
while away from a vehicle, you can operate an VRC 6940 from an
AC universal power supply. You need the AC universal power
supply, an AC line cable, and a DC power cable as listed on page
9.
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To provide power from an AC source:
1. Insert the AC line cable into the AC connector on the AC universal power supply.
2. Plug the other end of the AC line cable into an AC wall outlet.
3. Insert the DC power cable into the DC connector on the AC
universal power supply.
4. Plug the other end of the cable into the terminal’s Power
Connector.
Installation and the Internal Battery
A terminal’s internal battery may be depleted when you first install
it. The internal battery charges itself from the terminal’s main
power supply (DC or AC).
If the main power supply is stable, you can plug in the terminal and
use it immediately. If the main power supply is not stable, there
may be power interruptions that cause the terminal to reset itself
during its first few hours of operation.
If the terminal resets itself, you may lose unsaved data. To avoid
this, we recommend that you plug in the terminal and allow it to
charge for two hours before using it.
It takes 48 hours to fully charge the internal battery. A fully charged
internal battery maintains data for up to 72 hours if the unit is
disconnected from its main power source. This time is reduced if
the radio is in a mode where it maintains continuous
communication with a host.
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VRC 6940 Terminal
Regulatory Information
All Symbol devices are designed to be compliant with rules and regulations in
locations they are sold and will be labeled as required.
Any changes or modifications to Symbol Technologies equipment, not expressly
approved by Symbol Technologies, could void the user’s authority to operate the
equipment.
Radio Frequency Interference Requirements
Tested to comply
with FCC Standards
FOR HOME OR OFFICE USE
installation. This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected
• Consult the dealer or an experienced radio/TV technician for help.
Radio Frequency Interference Requirements - Canada
This device complies with RSS 210 of Industry & Science Canada. Operation is
subject to the following two conditions: (1) this device may not cause harmful
interference and (2) this device must accept any interference received, including
interference that may cause undesired operation.
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
Label Marking: The Term "IC:" before the radio certification only signifies that Industry
Canada technical specifications were met.
mounted externally at remote locations or operating near users at stand-alone
desktop of similar configurations must operate with a minimum separation distance
of 20 cm from all persons.
Note: This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to Part 15 of the
FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential
FCC RF Exposure Guidelines
Remote and Standalone Antenna Configurations
To comply with FCC RF exposure requirements, antennas that are
Marking and European Union Compliance
RLAN's (2.4GHz) for use through the EEA have the following restrictions:
•Maximum radiated transmit power of 100 mW EIRP in the frequency
range 2.400 -2.4835 GHz
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Quick Reference
• France, equipment is restricted to 2.4465 -2.4835 GHz frequency range
• Belgium outside usage, the equipment is restricted to 2.460 -2.4835 GHz frequency range
• Italy requires a user license for outside usage.
Statement of Compliance
Symbol Technologies, Inc., hereby, declares that this device is in compliance with the
essential requirements and other relevant provisions of Directives 1999/5/EC, 89/
336/EEC, 73/23/EEC and 95/54/EC. Declaration of Conformities may be obtained
from http://www2.symbol.com/doc/
Other Countries
Mexico - Restrict Frequency Range to: 2.450 - 2.4835 GHz.
Israel - Restrict Frequency Range to: 2.418 - 2.457 GHz.
Sri Lanka - Restrict Frequency Range to: 2.400 - 2.430 GHz.
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VRC 6940 Terminal
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Warranty
(A) Warranty Symbol Technologies (he reafter “Seller”) hardware Produc ts are wa rranted against defects in
workmanship and materials for a period of twelve (12) months from the date of shipment, unless otherwise
provided by Seller in wri ting, provided the Product remains unmodified and is operated under normal and
proper conditions. Warranty provisions and durations on software, integrated installed systems, Product
modified or designed to meet specific customer specifications (“Custom Products”), remanufactured
products, and reconditioned or upgraded products, shall be as provided in the applicable Product
specification in effect at the time of purchase or in the accompanying software license.
(B) Spare Parts Spare parts (i.e. parts, components, or subassemblies sold by Seller for use in the service
and maintenance of Products) are warranted against defects in workmanship and materials for a period of
thirty (30) days f rom the date of shipment. Spare parts may be new or originate fr om returned units under the
conditions set forth in subsection D below.
(C) Repair of Symbol-branded hardware For repairs on Symbol-branded hardware Products under this
Agreement, including repairs covered by warranty, the repair services provided are warranted agai nst
defects in workmanship and materials on the repaired component of the Product for a period of thirty (30)
days from the shipmen t date of the repaired Product, or until the end of the original warranty period,
whichever is longer.
(D) Product Servic e Products may be serviced or manufa ctured with parts, components, or subas semblies
that originate from returned products and that have been tested as meeting applicable specifications for
equivalent new m aterial and Products. The sole obligation of Seller f or defective hardware Pro ducts is limited
to repair or replacement (at Seller’s option) on a “return to servic e depot” basis with prior Seller authoriza tion.
Customer is responsible for shipment to the Seller and assumes all costs and risks associated with this
transportation; return shipment to the Customer will be at Seller's expense. Customer shall be responsible
for return shipment charges for product returned where Seller determines there is no defect (“No Defect
Found”), or for product returned that Seller determines is not eligible for warranty repair. No charge will be
made to Buyer for replace ment parts for warranty repairs. Seller is not respo nsible for any damage to or loss
of any software programs, data or removable data storage media, or the restoration or reinstallation of any
software programs or data other than the software, if any, installed by Seller during manufacture of the
Product.
(E) Original Warranty Period Except for the warra nty applying solely to the repai red component arising fro m
a repair service as provide d in Section C above, the aforementioned provisions do not extend the original
warranty period of any Product that had either been repaired or replaced by Seller.
(F) Warranty Provisions The above warranty provisions shall not apply to any Product (i) which has been
repaired, tampered with, altered or modified, except by Seller’s authorized service personnel; (ii) in which the
defects or damage to the Product result from normal wear and tear, misuse, negligence, improper storage,
water or other liquids, battery leakage, use of parts or accessories not approved or supplied by Symbol, or
failure to perform operator handling and scheduled maintenance instructions supplied by Seller; (iii) which
has been subjected to un usual physical or electrical stress, abu se, or accident, or forces or exposure beyond
normal use within t he specified operational and env ironmental parameters set forth in th e applicable Product
specification; nor shall the above warranty provisions apply to any expendable or consumable items, such
as batteries, supplied with the Product.
EXCEPT FOR THE WARRANTY OF TITLE AND THE EXPRESS WARRAN TIES STATED ABOVE,
SELLER DISCLAIMS ALL WARRANTIES ON PRODUCTS FURNISHED HEREUNDER INCLUDING ALL
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR USE. ANY
IMPLIED WARRANTIES THAT MAY BE IMPOSED BY LAW ARE LIMITED IN DURATION TO THE LIMITED
WARRANTY PERIOD. SOME STATES OR COUNTRIES DO NOT ALLOW A LIMITATION ON HOW LONG
AN IMPLIED WARRANTY LASTS OR THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS. IN SUCH STATES OR COUNTRIES, FOR
SUCH PRODUCTS, SOME EXCLUSIONS OR LIMITATIONS OF THIS LIMITED WARRANTY MAY NOT
APPLY.
The stated express warranties are in lieu of all obligations or liabilities on the part of Seller for damages,
including but not limited to, special, indirect or consequential damages arising out of or in connection with
the use or performance of the Product or servi ce. Seller’s liability for damages to Buyer or others resulting
from the use of any Product or service furnished hereunder shall in no way exceed the purchase price of said
Product or the fair market value of said service, except in instances of injury to persons or property.
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Service Information
Before you use the unit, it must be configured to operate in your facility’s network and
run your applications.
If you have a problem running you r unit or using your equipment, contact your facility’s
Technical or Systems Support. If there is a problem with the equipment, they will
contact the Symbol Support Center:
United States
United Kingdom0800 328 2424 Asia/Pacific+65-6796-9600