Bretford MDMTAB30 User Manual

What is the “Power Manager” doing?

The “Power Manager” has two LED indicator lights visible on the side of the cart that let you know what it is doing.

The light on the left is Amber and the right one is Red

Amber

Red

1.  When the power button is switched to the “On” position, both
indicator lights will light up for approximately 2 seconds.

2.  Both lights will then turn off while the “Power Manager” evaluates
the power required to charge the first set of devices.

3.  The Amber light will come on and stay lit indicating that the “Power
Manager” is now in “Smart Charge” mode. This means that tablets
will be charged in groups, three minutes at a time.

4.  Once the power needed to charge all of the devices in the cart
reaches a level that will not trip the circuit, the “Power Manager”

enters “All Charge” mode and both lights will be off. All devices are
now charging.

1.  If the Amber light displays single blinks, it means the current required to power the auxiliary outlet is too high. Unplugging whatever is in
the auxiliary outlet should allow the “Power Manager” to resume charging the devices.

2.  If both the Amber and Red lights start to blink, it means one set of devices is drawing too much current and the “Power Manager” needs to
be reset by turning it off and back on. If problem persists there may be a faulty device that needs to be removed.

3.  If the Amber light displays double blinks, the internal temperature of the cart is too high. Open the doors of the cart and/or move the cart
to a cooler room. The cart should cool down without having to turn off the “Power Manager”

MDMTAB30

30 Tablet Computers in Vertical Slots

Maximize your technology investment

Unique Power Management & Control System
gives you the ability to:

Save on energy costs – the “Power Manager”
knows the more charged a battery, the less power
it requires.

Extend the battery life of your computers with
one touch!

Designed for the IT Coordinator, the
Instructor & the Student

Easy set-up for the IT Coordinator
Easy to maintain by the Instructor

Easy to use for the Student

Laser-cut Identification System helps keep you
in control and your investment organized.

Dual-Locking Swing Handle

Flexible Security

The MDM Tablet Cart is secured with
a unique dual-locking handle built
right into the doors. The handle can
be opened by using EITHER the three
digit combination or a key.

2. Using the Combination Locks

•  Dial in the factory set combination
– “000”

•  Turn the wing knob 180 degrees
counter clockwise until the arrow

points straight up (3). Lift and
turn the handle to open the door.

•  To re-lock, turn the wing knob 180
degrees clockwise and scramble

the combination.

•  The MDM Tablet Cart features the new and improved “Power Manager”, which is designed to continuously charge
even the most power hungry laptops using only one wall outlet.

•  The system uses a “Round Robin” charging cycle that constantly evaluates the demand for power and allows
each electrical strip time to cool down. Cooler batteries last longer, and extended battery life saves you money.

•  One Auxiliary Outlet is included on the side of the cart to plug in a video projector or printer. Since the “Power
Manager” dedicates power to the auxiliary outlet when in use, the risk of tripping the circuit is eliminated.

•  A Divider Panel separates the computer/battery from the transformer, minimizing the transformer’s heat impact on
the battery … cooler batteries last longer.

MDM Tablet Cart

USER GUIDE

Power Management System … The “Power Manager”

Cut Here - Finished size = 16”W x 11”H - Folded three times, like a map

11000 Seymour Avenue Franklin Park, IL 60131 USA 800 521 9614

www.bretford.com

1. Using the Key

•  Insert the key into the lock and
turn it 180 degrees counter

clockwise (2)

•  Lift and turn the handle to open
the door.

•  To re-lock, turn the key 180
degrees clockwise.

3. Changing the Combination

•  Put the keylock in the locked
position and dial in the existing
combination.

•  Turn the wing knob 180
degrees + 15 degrees counter

clockwise (3) & (4). Enter the
desired new combination.

•  Turn the wing knob 15 degrees
clockwise. The new

combination is now set.

Please Note: It is recommended
that nothing be plugged into the
Auxiliary outlet while charging

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Basic Troubleshooting

Part #: 031-9809

®

Cord Winder

on the side panel,
under outlet, provides

easy access up high,
so that the cord does
not get crimped under

the wheel.

Directional Locking
Casters can be locked as a

rigid caster for easy rolling down
the hallway, or unlocked to swivel

for easily getting into tight spaces.

Security provided by dual-locking handles
built right into the steel constructed doors.

Front View

Back View

MDM Tablet Cart

USER GUIDE

11000 Seymour Avenue Franklin Park, IL 60131 USA 800 521 9614

www.bretford.com

MDMTAB30

30Tablet Computers in Vertical Slots

Cable Management System … Instructions

How Does a Tablet Computer Manage Heat?

To manage the heat stress of the battery, computer engineers include
sophisticated battery management functions in the design of the computers.
They can be found in two places: the external charger & internal to the tablet

computer itself. The transformer converts the alternating current from the
wall socket to a lower voltage direct current. Besides charging the tablet’s

battery these “adapters” can supply enough electricity to operate the tablet
and charge the battery simultaneously.

Deep inside the computer a dedicated microcircuit continuously monitors
and manages the charging current, voltage and temperature of the battery. If
the temperature of the battery exceeds limits, the microcircuit will stop

charging the battery until the temperature drops to acceptable levels.

ELECTRICAL: Avoid sparks. Avoid arcing Always turn OFF the power to the cart before plugging IN or OUT!

ELECTRICAL: For Safety Purposes, make sure all electrical components do not exceed the the maximum load rating of 12 amps.

ELECTRICAL: Risk of electrical shock. Do not plug the power cord into another extension cord or relocatable power tap.

ELECTRICAL: The power strips inside the tablet cart are only for charging tablet computers. Any other use may cause an

overload for the Power Management System, causing the “Power Manager” to shutdown. To reset the “Power Manager”, turn off the
main power switch, unplug the non-tablet device, then turn the main switch back on.

CAUTION: Be sure each tablet computer is turned OFF before plugging into the cart..

CAUTION: Do Not block the ventilation holes on the cart. Proper air flow is required for safe operation of equipment.

CAUTION: Cart with computers should be kept in a room with a maximum temperature not to exceed 77° F or 25° C.

CAUTION: Maximum weight of accessories on top of cabinet is 25 pounds.

CAUTION: Avoid loading equipment in the cart in a uneven fashion. Uneven weight distribution could cause a hazardous condition.

CAUTION: Before moving cart from one room to the next, wrap the power cords on the cord winders located on the side of the cart.

CAUTION: Engage locking casters when cart is not in transit.

Keeping the battery cooler while charging allows the battery to charge faster.

Laser-Cut ID Numbers

in both front & back help keep
computers and their cable sets in

the right place and make it easy to
identify if something is missing.

Power Manager

keeps the constant flow
of power from a single

wall outlet charging
batteries where needed.

Dual Handle Design

Allows both teachers and
students to push and pull

the cart easily and safely.

Step-by-Step Instructions to Organize Your Cords

•  Unpack the Tablet Computers, being careful to keep each computer
with its matching cord set.

•  For tablets with a smaller USB connected power supply, from the
rear of the cart, thread the plug end that connects to the device through

the laser numbered hole matching the appropriate slot for the device in
front.

•  Thread that cable through the cable management channel above each
storage slot, leaving enough slack to connect to the device and then

reconnect the USB cable to the power adapter.

•  Then plug in to any available outlet in the rear of the cart.

•  For tablets that have a larger type power adapter (1” x 1” x 3”) the

power adapter and the excess cord can be wrapped with the Velcro
straps provided and stored on end in the cavity behind the tablet stop
(pictured), leaving enough cord slack for both the AC plug end and the

device connector end.

•  Then thread the cord that goes to the device through the cable
management channel.

•  Disconnect the connector from the power adapter (pictured) and thread
that smaller end through from the rear to the front of the cart, (pictured)

reconnecting it after threading.

•  Then plug in to any available outlet in the rear of the cart.

®

Storing power supply in rear cavity Thread power supply connector through back panel

Disconnect connector from power adapter

Cable management channel

Part #: 031-9809