Lift-master MADCBB User Manual
Models:
MADCBB, MATDCBB, MASDCBB & MASTDCBB
(MEGA ARM, TOWER, MEGA SPRINT & MEGA SPRINT TOWER)
1/2 HP COMMERCIAL DUTY PARKING GATE OPERATOR
INSTALLATION AND SERVICE MANUAL
IMPORTANT: Read and understand Warranty Page first.
Batteries (not included) MUST be connected for proper operation of unit.
Use (2) LiftMaster sealed 12VDC 7AH (Part # MBAT).
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
Optional full length
aluminum tower
NEW!
radio receiver
now included
2
INTRODUCTION
Unit Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
INSTALLATION
Concrete Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Anchors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Conduits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
WIRING AND HOOKUP
120 Volts AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Input Commands 1-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Accessory and Relay Connections . . . . . . . . . . . . . . . . . . . . . .5
Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 .
Master/Second Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
REVERSING ARM DIRECTION
Reversing the Direction of the Arm . . . . . . . . . . . . . . . . . . . . .6
TIMERS AND MODE SELECTIONS S1 & S2
Mode Selections - S1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Mode Selections - S2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Close Timer Selection - S2 . . . . . . . . . . . . . . . . . . . . . . . . . . .7
INSTALL THE RECEIVER
Wiring the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Set Security Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Programming the Remote to the Receiver . . . . . . . . . . . . . . .8
To Erase All Remote Control Codes . . . . . . . . . . . . . . . . . . . . .8
TABLE OF CONTENTS
UNIT OVERVIEW
The LiftMaster model MEGA ARM barrier style parking gate
operator is unique in the industry. Setting the MEGA ARM apart are
many features that make it the front runner in its class:
• Built in battery run - inherent 24 VDC backup power with
regulated 24 VDC for accessories.
• High torque 24 volt Permanent Magnet DC motor.
• Full service controller with eight inputs and LED indicators for
loops, card reader, radio, etc.
• Continuous duty operation for all applications (6,000 per day,
SPRINT version 10,000 per day).
• Reversible arm direction for right or left handed operation.
• Instant Reverse Device (IRD) monitor senses obstructions going
open and close.
• Automatic open of gate arm when power is lost if desired (with
15 sec. delay selection).
• Raise gate input memory will memorize multiple vehicles – ideal
for barcode scanners and AVI.
• Ability to STOP arm in close travel if tail-gating is sensed at close loop.
• Anti-tail gate alarm - fires K1 relay to trigger a warning device
when tail-gating is sensed.
• SAMS with “memory” - allows Mega Arm to open a slide/swing
gate first then raises arm.
• Break away mount design for the 12-15' x 3" tubular aluminum boom arm.
• Dynamic motor braking to preserve arm positioning.
INTRODUCTION
ADJUSTMENT
Instant Reverse Device (IRD) . . . . . . . . . . . . . . . . . . . . . . . . .9
Gate Arm Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
OPERATION AND MAINTENANCE
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . .9
General Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Shear Pin Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
TROUBLESHOOTING
Battery Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Gate Not Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
SUGGESTED ENTRAPMENT PROTECTION DEVICE LOCATIONS
Free Exit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Entry With Access Control Device . . . . . . . . . . . . . . . . . . . . .11
Dual Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
SEQUENCE ACCESS MANAGEMENT SYSTEM (SAMS)
SAMS With Other Operators . . . . . . . . . . . . . . . . . . . . . . . . .12
SAMS Two Mega Arms with “Memory” . . . . . . . . . . . . . . . . .12
CONTROL BOARD LAYOUT
Input Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
MEGA ARM PARTS LIST
Part Numbers and Descriptions . . . . . . . . . . . . . . . . . . . . . . .14
Parts Shipped . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
WARRANTY AND REGISTRATION 15
REPAIR PARTS AND SERVICE 16
• All rust proof aluminum construction with white powder coat baked
on enamel.
• Molded Polyethylene UV stabilized cover never needs wax or paint.
• Direct drive gear reducer eliminates many parts that might
otherwise fail.
• Microprocessor (RISC) based electronics with watchdog reset timer.
• State of the art MOSFET motor drive technology, NO contactors or relays.
• Soft start and stop in open and close travel motions.
• No limit switches to fail - uses magnetic (Hall Effect) sensors to
monitor arm position.
• Maximum Run Timer for motor with anti-tamper protection in closing direction.
• Each unit configurable as master or second operator.
• Safe 24 VDC low voltage motor and control wiring.
• Open architecture PCB with space for OVERDRIVE CPU for future
expanded options.
• LED diagnostic center for easy on-site trouble shooting.
• Closing timer adjustable from 1-31 seconds with on/off selection.
• Tranzorb diodes on all inputs for protection against transient
voltage spikes.
• Capable of being powered by 120 VAC, 220 VAC or Solar power.
• Unswitched duplex outlet gives convenient supply of 120 VAC for
transformers and 120 VAC accessories.
• 10 year perforation warranty on cover and chassis with 2 years on
electronics and mechanism.
3
CONCRETE PAD
The concrete pad for operator mounting should be approximately
24"x24"x24" in order to provide adequate weight and structure to
insure proper and stable operation. Pad should be 6" above
finished grade or even with top of curb if one is present. (NOTE:
Pad should always extend below frost line in regions where
ground will freeze.)
ANCHORS (MOUNTING UNIT)
Proper anchors for fastening operator to pad will be a 1/2"x6"
wedge anchor patterned to match the mounting base of the unit.
They should be installed with approximately 1.25" showing above
concrete surface in order to allow for the 1/2" thick base plate as
well as washers for leveling.
NOTES:
• For automotive use only, no motorcycles, bicycles or
pedestrians.
• Heater option MUST be used if temperature is 30°F or lower
temperatures.
CONDUITS
Conduits should be restricted to fit the 3.5"x3.5" opening in
pedestal base. Location on pad should be centered and spaced
approximately 6" from edge of pad on drive way side (in order to
get the most reach out of arm). Separate conduits to be included
should be 120 VAC main power, low voltage control wiring and
one or two extra for loop sensor leads. Conduit size should be
limited to .5" when possible to reduce crowding if more than four
are needed. All conduits must be UL approved.
TOWER CABINET DIMENSIONS
INSTALLATION
42"
3.5"
36.5"
Side View
14.2"
42"
13.5"
13.5"
Foot Print of Base on Pad
Pad (24"x24"x24")
24"
Door
10.25"
8.25"
Open Area In Base
For Conduit
Gate Arm Bracket
7.125" 7.125"
14.2"
13.5"
12.2"
9.9"
3.5"
UNIT DIMENSIONS
41.5"
17.5"
20.25"
15.75"
41.5"
8"
20.25"
13.5"
9"
4"
21.5"
3.5"
36.5"
5"
3.5"
3.5"
Foot Print of Base on Pad
9"
8"
Inside Post
5.5"
5.5"
Pad (24"x24")
6"
3.25"
12"
12"
These Dimensions Will Center
the Operator on the Pad
Center Line
2"
8"
120 VAC POWER
Be sure your main power (120 VAC) is OFF before attempting
hookup. The 120 VAC supply should be terminated to the wires in
top of the 4"x4" tube at the top of the chassis. Connect the 120
VAC to BLACK wire, Neutral to the WHITE wire and Ground the
GREEN wire. IMPORTANT NOTE: Do not connect any 120 VAC
wires directly to the terminal strips on the electronic control
board. Only U.L. approved 14 AWG (or larger) 600 volt insulated
wire should be used. A separate UL approved 10 amp circuit
breaker should be used for each MEGA ARM operator. Batteries
must be installed after 120 VAC power is turned on. See
BATTERY at page 5 and 120 VAC wiring diagram.
INPUT COMMANDS
(Use common and normally open contacts from devices connected
to these inputs.)
Control wire connections at low voltage terminal strip will be at the
top of the electronic control board. Make connections to the
appropriate points for the desired operation. Wires should be UL
approved 600 volt rated and at least 18 awg. They are to be routed
through the upper grommet in chassis to avoid chafing. All
external control devices must have normally open dry contacts.
CAUTION: DO NOT CONNECT ANY DEVICE WHICH WOULD
DELIVER ANY VOLTAGE OF ANY KIND TO THESE TERMINALS.
Terminals 9, 10, 11, 12 are the commons (0 VDC) used to activate
the following inputs:
1, 2, 3 OPEN: These inputs will trigger gate open when pulsed
or hold gate open with maintained contact. When released gate
will close if closing timer is on or if close input is given.
4, AUXILIARY OPEN: Same as 1, 2 and 3 with S2 switch 6 off.
With S2 switch 6 on, this input will memorize multiple vehicles
and not allow gate to close until the final vehicle in memory
crosses the close loop. Use with laser scanners or card readers
and (transmitters with timed anti-pass back). With S1 switch 5
on, this input becomes a momentary pulse open, pulse close.
NOTE: Insert a jumper across the JP2 terminal to allow the SAMS
feature (see page 7 and 12) to work with the multiple vehicle
memory count selection, use the K1 relay to open the sequenced
gate (S1-5 off, S2-6 on, jumper across JP2). This allows gate to
store input counts via J5 #4 but not raise the arm until the
sequenced slide or swing gate has fully opened.
5, SAFETY: This input is generally not used with the MEGA
ARM. If used its function is to make gate reverse and go back
to the open position if it was closing. Input is disabled when
gate is closed.
6, CLOSE: When used with a vehicle detector, it is
recommended that the presence contacts (N.O. & C.) be used
for the close input. This input will close gate after input is
applied and then removed. It will stop the open cycle and
reverse gate to close. (Example: Car crosses over close loop
before arm reaches full open position- gate will reverse and
close). (NOTE: The close input also acts as a safety-stop in that
if gate is closing and a tailgater is sensed at the close input, the
gate WILL STOP its closing motion and not continue to close
until the close input is removed or gate is re-opened).
7, BACK-AWAY (FREE EXIT INPUT): This input is used as a free
exit input to open gate. When input is active, gate will open and
close immediately once input is removed. (EXAMPLE: Car pulls
up to exit loop, gate opens; car “backs-away” from exit loop
and gate closes).
8, SHADOW (SAMS): (Redefined input!) Used to monitor an
auxiliary open limit switch of another operator in the same lane.
SAMS with memory feature (v5.20 or higher), see page 12.
9, 10, 11,12 - COMMON: These are the commons (0 VDC) to
be used to activate above inputs.
NOTE: Above inputs are tied to LED indicators to show input
command activity.
4
WIRING AND HOOKUP
120 VAC POWER CONNECTION
120 VAC (Black)
Neutral
(White)
Ground
(Green)
Top End of
4"x4" Tube
120 VAC connections are to be made
in top of 4"x4" tube (post). Only use
UL-listed 600 V wire inside tube.
To reduce the risk of SEVERE INJURY or DEATH:
• ANY maintenance to the operator or in the area near the
operator MUST not be performed until disconnecting the
electrical power and locking-out the power via the operator
power switch. Upon completion of maintenance the area
MUST be cleared and secured, at that time the unit may be
returned to service.
• Disconnecting power at the fuse box BEFORE proceeding.
Operator MUST be properly grounded and connected in
accordance with local electrical codes. NOTE: The operator
should be on a separate fused line of adequate capacity.
• ALL electrical connections MUST be made by a qualified individual.
• DO NOT install any wiring or attempt to run the operator
without consulting the wiring diagram. We recommend that
you Install an optional reversing edge BEFORE proceeding with
the control station installation.
• ALL power wiring should be on a dedicated circuit and well
protected. The location of the power disconnect should be
visible and clearly labeled.
• ALL power and control wiring MUST be run in separate conduit.
• BEFORE installing power wiring or control stations be sure to
follow all specifications and warnings described below. Failure
to do so may result in SEVERE INJURY to persons and/or
damage to operator.
WARNING
WARNING
5
ACCESSORY AND RELAY CONNECTIONS
These terminals will provide battery backed power to 24 VDC
devices and are located at the bottom of the electronic control
board at J4 terminals 1 and 2. Terminal 1 is 24 VDC (+) and
number 2 is 0 VDC (-). Peripheral CLASS 2 low voltage devices
that require 24 VDC power maybe connected here (500 ma.
maximum). EXAMPLE: Vehicle detector, radio receiver.
RELAY OUTPUT K1 - (OPTION)
S1-6 off S1-8 off, relay will fire (latch) when gate is not closed.
S1-6 on S1-8 off, relay will fire when arm is pushed up off of
limit switch (use with slip clutch option) and fires relay when a
tail-gate is detected by the close loop - ANTI TAIL-GATE
ALARM.
S1-6 off S1-8 on, relay will pulse relay when arm reaches full
open position.
S1-6 on S1-8 on, relay will only pulse when input is given to J5
1,2,3 inputs. (see page 12).
BATTERY INSTALLATION
HOOKING UP BATTERY LEADS - ALWAYS HOOKUP AND TURN
ON AC POWER BEFORE INSTALLING BATTERIES. After turning
on AC power, install two new, fully charged 12 volt DC batteries
on shelf next to motor. Connect red lead from operator to the
positive (RED +) terminal of one battery and black lead from the
operator to the (BLACK -) terminal of the OTHER battery. Place
the supplied jumper between the remaining terminals of each
battery if one is not already in place (Figure 1). (Use LiftMaster
MBAT or 29-NP712 for replacement batteries.)
WARNING: Do not run operator without installing the batteries.
MASTER/SECOND WIRING
STEP 1: In a master/second configuration, either unit can be
the master. Choose one unit to be the master and then direct all
control wiring to it (also install vehicle detectors and receivers
in it).
STEP 2: At the MASTER, any input (at J5) with control
(detectors, receivers, keypads, timers, etc.) wires to it must
also be run to the same terminals of the second. Along with
these control wires, both operators MUST share a common
ground connection from chassis to chassis (or from common
to common, i.e., master gate J5 terminal #12 to second gate J5
terminal #12).
EXAMPLE: If only open and close are used at master then three
wires will run between gates (Figure 2).
STEP 3: If it is required that if one gate senses an obstruction,
the other reverses also, then 3 additional wires must be run
between the master J3 and second J3 (Figure 3). These
connections are for transmitting IRD (obstruction signals)
between both units. This will allow the master or second to
inform the other that a closing obstruction has occurred and
for it to reverse and open. SET switches on S2, 1-8 the same
on both gates.
Open
Close
Common
Master-J5
FIGURE 2
123 45 678 9101112
Second-J5
12 34 56789101112
FIGURE 1
12 VDC Battery
–
Black Lead
+
Jumper
–
12 VDC Battery
Failure to install batteries correctly will cause
damage and will not be covered by warranty.
FIGURE 3
RX GND TX
12 34
Master-J3
Second-J3
12 34
RX GND TX
+
IRD - Obstruction Signal Connections
Terminal 1 of Master must go to terminal 4
of Second and terminal 1 of Second must
go to terminal 4 of Master. Terminal 2 of
Master must go to terminal 2 of Second.
Red Lead
Loading...