Nortek Mighty Mule MM271 User manual

Copyright©2019 Nortek Security and Control, LLC. 10021847 A
MM271
Mighty Mule®is the retail brand of Nortek Security and Control, LLC.
This product meets the requirements of UL325, the standard for gate operator safety.
Installation Manual
Horizontal Support
Gate Swings Evenly and Freely
Hung Firmly and Plumb
Post Bracket
Control Box
Fence Post Set in Concrete
Run 1000' (max.) of low
voltage wire to control
box from transformer
(wire not included).
Power Cable Closed Position Stop Plate
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
Gate Bracket
Warning Sign
Single Gate Operator
120 Volt indoor
Transformer
(surge protector
not supplied)
12 Volt automotive or marine
type battery in weather proof
housing (not included). Example of nished installation
(Installations vary slightly on different types of gates)
PRINTER’S INSTRUCTIONS:
INSTR,INSTL,MM271 - P/N: 10021847 A - INK: BLACK - MATERIAL: 20 LB. MEAD BOND - SIZE: 8.500” X 11.000” - TOLERANCE: ± .125” - FOLDING: ALBUM FOLD - BINDING: SADDLE STITCH - SCALE: 1-1

Product Usage
The Mighty Mule Gate Operator meets all of the safety requirements of a Class I Residential Vehicular Gate Operator and is intended for use solely
with vehicular swing gates in single-family residential applications that meet the Class I category listed in the table below.
Residential Vehicular Gate Operator-Class I:
A vehicular gate operator (or system) intended for use
in garages or parking areas associated with a residence
of one-to-four single families.
Commercial/General Access Vehicular Gate
Operator-Class II:
A vehicular gate operator (or system) intended for
use in a commercial location or building such as
a multi-family housing unit (ve or more single
family units), hotel, garages, retail store, or other
buildings accessible by or servicing the general
public.
Industrial/Limited Access Vehicular Gate Operator–
Class III:
A vehicular gate operator (or system) intended for use
in an industrial location or building such as a factory or
loading dock area or other locations not accessible by or
intended to service the general public.
Restricted Access Vehicular Gate Operator – Class IV:
A vehicular gate operator (or system) intended for use
in an industrial location or building such as a factory or
loading dock area or other locations not accessible by or
intended to service the general public.
Vehicular Gate Operator Class Categories
WARNING
This equipment meets Underwriters Laboratory Standard 325 (UL 325). However, gate equipment has
hazards associated with its use and therefore by installing this product the installer and user accept
full responsibility for following and noting the installation and safety instructions. Failure to follow
installation and safety instructions can result in hazards developing due to improper assembly. You agree
to properly install this product and that if you fail to do so Nortek Security and Control, LLC, shall in
no event be liable for direct, indirect, incidental, special or consequential damages or loss of prots
whether based in contract tort or any other legal theory during the course of the warranty or at any time
thereafter. The installer and/or user agree to assume responsibility for all liability and use of this product
releasing Nortek Security and Control, LLC, from any and all liability. If you are not in agreement with
this disclaimer or do not feel capable of properly following all installation and safety instructions you may
return this product for full replacement value.
READ ALL INSTRUCTIONS CAREFULLY AND COMPLETELY before attempting to install and
use this automatic gate operator. This gate operator produces a high level of force. Stay clear of the unit
while it is operating and exercise caution at all times.
ALL AUTOMATIC GATE OPERATORS ARE INTENDED FOR USE ON VEHICULAR GATES ONLY.
Table of Contents
Please Read This First! .............................................................................................................ii
Important Safety Information...................................................................................................iii
Manually Opening and Closing Gate ...............................................................................................................iii
For the Installer and End User.........................................................................................................................iv
Installing Warning Signs and Pedestrian Gates .............................................................................................viii
Required Safety Precautions for Gates............................................................................................................ix
Technical Specications .......................................................................................................... x
Mighty Mule 271 Gate Opener........................................................................................................................ x
Before You Begin......................................................................................................................xi
Powering Options...........................................................................................................................................xi
Solar Panel and Gate Activity Chart.................................................................................................................xi
Check Existing Gate Size and Material...........................................................................................................xii
IMPORTANT: Check for Proper Gate Installation .............................................................................................xii
Items Included .............................................................................................................................................xiii
Tools Needed ...............................................................................................................................................xiv
Items Not Included .......................................................................................................................................xiv
Installation ................................................................................................................................ 1
Closed Position Stop Plate Installation ............................................................................................................ 3
Control Box & Battery Installation ................................................................................................................... 4
Transformer Wiring Installation....................................................................................................................... 5
Solar Panel Installation................................................................................................................................... 6
Transmitter Programming............................................................................................................................... 7
Setting Closed Limit Position.......................................................................................................................... 9
Setting Dual Sense Detection & Auto Close Timer......................................................................................... 10
Connecting Additional Devices ..................................................................................................................... 11
Control Board Connections........................................................................................................................... 12
Connecting Accessories ............................................................................................................................... 13
Maintenance ........................................................................................................................... 14
Troubleshooting Guide........................................................................................................... 14
Audible Feedback......................................................................................................................................... 14
Visual Feedback........................................................................................................................................... 15
Repair Service ........................................................................................................................ 16
Conversion Chart.......................................................................................................................................... 17
Accessories ............................................................................................................................ 18
Gate Operator Installation Checklist ..................................................................................... 20

ii MM271 Installation Instructions MM271 Installation Instructions iii
Please Read This First!
Thank you for purchasing a Mighty Mule Gate
Operator—Nortek Security and Control's "do-it-
yourself" automatic gate operator! When correctly
installed and properly used, your Mighty Mule Gate
Operator will give you many years of reliable service.
Please read the following information to ensure you
have the correct system for your particular needs. If
so, this manual and will enable you to properly install
your Mighty Mule Gate Operator.
The Mighty Mule Gate Operator is designed for
installation on a pull-to-open single leaf gate (gates
that open into the property). The gate must not exceed
12 feet in length or weigh more than 300 pounds
(please see Technical Specications on page x). The
Mighty Mule Gate Operator can be used on vinyl,
aluminum, chain link, farm tube, and wrought iron
gates.
Not rated for use on solid surface gates due to
the potential to damage the operator and/or injure
someone.
The Mighty Mule Gate Operator accommodates
extra transmitters, digital keypads, solar panels,
push buttons, automatic gate locks, and other access
control products. These optional accessories (see the
Mighty Mule Accessory Catalog) are available at most
stores. Your store should be able to special order any
accessory not in stock. If your store cannot special
order accessories, please call the Mighty Mule Sales
Department (800-543-4283).
The Mighty Mule Gate Operator features Dual Sense
Technology™. This feature makes the gate stop and
reverse direction when it comes in contact with an
obstruction. This is factory set to the most sensitive
setting and must be adjusted during installation.
The Mighty Mule Gate Operator also has an adjustable
auto-close feature. After the gate reaches the fully
open position, it can be set to remain open up to 120
seconds before automatically closing. Pressing the
transmitter button at any time after the gate opens fully
will cause it to close immediately. OFF is the factory
setting; meaning the gate will stay open until you press
the transmitter (or keypad, etc.) again.
Go to www.mightymule.com for a dealer or retailer
near you or call [phone] for information about
our Linear professional line of gate operators and
accessories. Our Sales Department will be glad to give
you the name and phone number of a Linear dealer
near you.
BEFORE YOU BEGIN TO INSTALL YOUR AUTOMATIC GATE OPERATOR:
Read these instructions carefully to become familiar with all parts and installation steps.
The video is only designed as an overview of the installation procedure.
You must read the installation manual for detailed instructions
on gate operator safety and proper use of the gate operator.
Clevis Pin
Hairpin Clip
Gate Bracket
Front Mount
Because automatic gate operators produce high levels
of force, consumers need to know the potential hazards
associated with improperly designed, installed, and
maintained automated gate operator systems. Keep in
mind that the gate operator is just one component
of the total gate operating system. Each component
must work in unison to provide the end user with
convenience, security, and safety.
This manual contains various safety precautions and
warnings for the installer and end user. Because there
are many possible applications of the gate operator,
the safety precautions and warnings contained in
Disconnecting the Operator
1. Turn control box power switch OFF.
2. Remove the hairpin clip and clevis pin.
3. Remove the operator’s front mount from the
gate bracket.
The gate can be opened and closed manually when the
operator is disconnected.
this manual cannot be completely exhaustive in
nature. It does, however, provide an overview of
the safe design, installation, and use of this product.
CAREFULLY READ AND FOLLOW ALL
SAFETY PRECAUTIONS, WARNINGS, AND
INSTALLATION INSTRUCTIONS TO ENSURE
THE SAFE SYSTEM DESIGN, INSTALLATION,
AND USE OF THIS PRODUCT.
Warnings in this manual are identied with this
warning symbol. The symbol identies conditions that
can result in damage to the operator or its components,
serious injury, or death.
MANUALLY OPENING AND CLOSING GATE
Because Mighty Mule automatic gate operators are only part of the total gate operating system, it is the
responsibility of the installer and end user to ensure that the total system is safe for its intended use.
CAUTION
The gate will move freely and uncontrolled when the gate operator is removed from the gate. ONLY
disconnect the operator when the control box power switch is OFF and the gate is NOT moving.
NOTE: Substitute a Pin Lock for the clevis pin on the front mount
of the gate operator to prevent theft of the operator from the gate (see
accessory pages in back of this book).
Important Safety Information
NOT FOR THE CONTAINMENT OF ANIMALS.
Part #: FM133

iv MM271 Installation Instructions MM271 Installation Instructions v
I. Before Installation
1. Verify this operator is proper for the type and size of gate, frequency
of use and class of the gate system.
2. Make sure the gate has been properly installed and swings freely
in both directions. Repair or replace all worn or damaged gate
hardware prior to installation. A freely moving gate will require less
force to operate and will enhance the performance of the entrapment
protection devices used with the system (see page xii).
3. Review the operation of the system to become familiar with its
safety features. Understand how to disconnect the operator for
manual gate operation (see page iii).
4. The gate and operator installation must comply with any applicable
local codes.
5. This gate operator is intended for vehicular gates only. A separate
entrance or gate must be installed for pedestrian use (see page viii).
6. Always keep people and objects away from the gate and its area of
travel. No one should cross the path of a moving gate.
7. Identify all of the entrapment zones for the type of installation. An
entrapment zone is an area around the automatic gate system where
a person or object could be caught that increase the risk of injury.
Entrapment zones must be eliminated, guarded or protected.
8. When designing a system that will be entered from a highway or
main thoroughfare, make sure the gate system is placed far enough
from the road to prevent trafc congestion.
FOR THE INSTALLER AND END USER
II. During Installation
1. Install the gate operator on the inside of the
property and fence line. DO NOT install an
operator on the outside of the gate where the
public has access to it.
2. Be careful with moving parts and avoid close
proximity to areas where ngers or hands could
be pinched.
3. Devices such as contact sensors (sensing
edges) and non contact sensors (photo beams)
provide additional protection against vehicular
damage.
4. If push buttons or key switches are installed,
they should be within sight of the gate, located
at least 10 feet from any moving part of the gate
(see diagram below). Never install any control
device where a user will be tempted to reach
through the gate to activate the gate operator.
5. Do not activate your gate operator unless
you can see it and can determine that its area
of travel is clear of people, pets, or other
obstructions. Watch the gate through its entire
movement.
6. Secure outdoor or easily accessed gate operator
controls in order to prohibit unauthorized use of
the gate.
FOR THE INSTALLER AND END USER
Typical Entrapment Zones are shown in the diagrams on page iv:
Zone 1 – leading edge of the gate and the fence post.
Zone 2 – between the gate and the gate post.
Zone 3 – the path of the gate.
Zone 4 – the space between the gate in the open position and any object such as a wall, fence, tree, etc.
Zone 5 – pinch points between the operator and gate.
Moving Gate
Area
Driveway
10'
10'
10'
10'
NEVER install any control device
within gray area
Pull-To-Open
Application
Gate in the
Open Position
ZONE 2
ZONE 3
ZONE 4
ZONE 5
Driveway
ZONE 1
Entrapment
Zones for a
Pull-To-Open
Application
1. READ AND FOLLOW ALL INSTRUCTIONS.
2. Never let children operate or play with gate controls. Keep the remote
control away from children.
3. Always keep people and objects away from the gate. NO ONE
SHOULD CROSS THE PATH OF THE MOVING GATE.
4. Test the gate operator monthly. The gate MUST reverse on contact with
a rigid object or stop when an object activates the non-contact sensors.
After adjusting the force or the limit of travel, retest the gate operator.
Failure to adjust and retest the gate operator properly can increase the
risk of injury or death.
5. Use the manual/emergency release only when the gate is not moving.
6. KEEP GATES PROPERLY MAINTAINED. Read the
user’s manual. Have a qualied service person make repairs to
gate hardware.
7. The entrance is for vehicles only. Pedestrians must use sepa-
rate entrance.
8. The gate must be installed in a location that provides adequate
clearance between it and adjacent structures when opening and
closing to reduce the risk of entrapment. Swinging gates must
not open into public access areas.
9. SAVE THESE INSTRUCTIONS.
To reduce the risk of injury or death:
WARNING
Important Safety Information Important Safety Information

vi MM271 Installation Instructions MM271 Installation Instructions vii
III. After Installation
1. Attach the warning signs (included) to each side
of the gate to alert the public of automatic gate
operation. It is your responsibility to post warning
signs on both sides of your gate. If any of these
signs or warning decals becomes damaged,
illegible, or missing, replace them immediately.
Contact Nortek Security and Control for free
replacements.
2. The gate is automatic and could move at any time,
posing serious risk of entrapment. No one should be
in contact with the gate when it is
moving or stationary.
3. Do not attempt to drive into the gate area while
the gate is moving; wait until the gate comes to a
complete stop.
4. Do not attempt to “beat the gate” while the gate is
closing. This is extremely dangerous.
5. Do not allow children or pets near your gate. Never
let children operate or play with gate controls.
Keep the remote control away from children and
unauthorized users; store controls where children
and unauthorized users do not have access to them.
6. KEEP GATE SYSTEMS MAINTAINED.
Always turn power to operator OFF before
performing any maintenance. See page 14 for
maintenance procedures.
7. To operate this equipment safely, YOU must
know how to disconnect the operator for manual
gate operation (see page iii). If you have read the
instructions and still do not understand how to
disconnect the operator, contact the Mighty Mule
Service Department.
8. Disconnect the operator ONLY when the power is
TURNED OFF and the gate is NOT moving.
9. Make arrangements with local re and law
enforcement for emergency access.
10. Distribute and discuss copies of the
IMPORTANT SAFETY INFORMATION
section of this manual with all persons
authorized to use your gate.
11. IMPORTANT: Save these safety instructions.
Make sure everyone who is using or will be
around the gate and gate operator are aware
of the dangers associated with automated gate
systems. In the event you sell the property
with the gate operator or sell the gate operator,
provide a copy of these safety instructions to the
new owner.
Should you need a replacement manual, a copy
can be obtained by downloading one from the
Mighty Mule web site (www.mightymule.com),
by contacting Nortek Security and Control, at
3121 Hartseld Road, Tallahassee, Florida 32303
or by calling 1-800-543-4283 and requesting a
duplicate copy.
FOR THE INSTALLER AND END USER FOR THE INSTALLER AND END USER
Mighty Mule gate operators utilize Dual Sense
Technology™entrapment protection. Dual Sense
Technology™is built into every Mighty Mule and
provides redundant methods of entrapment protection
for open and close gate directions.
In addition to Dual Sense Technology, every Mighty
Mule gate controller has provisions for the connection
of additional obstruction detection devices such as
sensing edges and photo beams.
These devices may be located where there is an
increased risk of obstruction. Refer to the diagram
below.
One or more edge sensors may be located at the
leading edge, bottom edge, and post edge, both inside
and outside of a vehicular swing gate system.
Wiring to sensors must be located and arranged so the
wiring between the sensor and the gate operator is not
subjected to mechanical damage.
A wireless sensor such as one that transmits radio
frequency (RF) signals that promote safety shall be
located where the transmission of the signals is not
obstructed or impeded by building structures, natural
landscaping or similar objects.
Leading Edge
of the gate
Photo Beams
(recommended, not included)
Photo Beams
(recommended, not included)
Sensing Edges
(recommended, not included)
Vehicular Gate
Entrapment and Obstruction Protection
Mighty Mules’s Dual Sense Technology™provides entrapment protection, when properly adjusted. Since all installations
are different, you may need to add photo beams or sensing edges to help prevent damage to vehicle or other items that
could be hit by a moving gate.
Entrapment Alarm
The Mighty Mule Automatic Gate Operator is designed to stop and reverse the gate when the gate comes in contact with
an obstruction. Additionally, these operators are equipped with an audio entrapment alarm which will activate if the unit
obstructs twice while opening or closing. This alarm will sound for a period of 5 minutes, or until the operator receives an
intended signal from a hard wired entry/exit source (e.g. push button control or keypad). Turning the power switch on the
control box OFF and back ON will also deactivate the alarm. Wireless controls such as transmitters and wireless keypads
will not deactivate the alarm.
Important Safety Information Important Safety Information
NOTE: Photo beams should always be located on the non-travel side of the gate.

viii MM271 Installation Instructions MM271 Installation Instructions ix
Product identication label (1)
installed on the side of the Control box.
Labels (1) installed on the front of control box
Control arm label (2) installed on operator arm
mightymule.com
MM271
1. KEEP CLEAR! Gate may move at any time.
2. Read all SAFETY INSTRUCTIONS in the user’s
manual.
3. Do not allow children to operate gate or play in
gate area.
4. This gate is for vehicles only. Pedestrians must
use separate entrance.
1. TENEZ-VOUS LOIN! La barrière peut se déplacer
à tout moment.
2. Lisez toutes les instructions de sécurité dans le
manuel de l'utilisateur.
3. Ne laissez pas les enfants utiliser la barrière ou
jouer à proximité de la barrière.
4. Cette barrière est uniquement réservée aux
véhicules. Les piétons doivent utiliser une autre
entrée.
AVERTISSEMENT
WARNING
La barrière en mouvement
peut provoquer des blessures
graves ou la mort!
Moving gate can cause injury
or death!
10019665A
GEN7 SERIES – DC Swing Gate Operator
P/N MM271
Conforms to UL STD 325 • Certied to CSA STD C22.2 No.247
Maximum Gate: 300 lb. (136 kg); 12 ft. (3.65 m)
Voltage: 12 Vdc; Frequency: 0 Hz; Power: 25 W
Class I Vehicular Gate
S/N: YYYYMMDDx0000
Nortek Security & Control – Carlsbad, CA USA
E472888
Warning Sign Pedestrian Gate
Pedestrian Gate Lock
Vehicular Gate
(recommended, not included)
7 foot
minimum
Important Safety Information Important Safety Information
Warning signs alert people of automatic gate operation and are required when installing Mighty Mule Automatic
Gate Operators. A minimum of two WARNING SIGNS must be installed in the area of the gate. Each sign is to be
visible by persons located on the side of the gate on which the placard is installed.
The operator is intended for installation only on gates used for vehicles. Pedestrians must be supplied with a
separate access opening. The pedestrian access opening shall be designed to promote pedestrian usage. Locate
the gate such that persons will not come in contact with the vehicular gate during the entire path of travel of the
vehicular gate.
We recommend using the Bulldog Pedestrian Gate Lock (Call the Nortek Security and Control Sales Department
at 800-543-4283) for controlled access.
INSTALLING WARNING SIGNS AND PEDESTRIAN GATES
Warning Signs
The gate operator is provided with 2 safety warning signs.
The signs MUST be installed on the front and back of the
gate where they will be visible in the area of the gate.
Permanently secure each warning sign to the gate.
Immediately replace a damaged, eligible or missing
warning sign.
Call Customer Service at 800-543-4283 for a free
replacement.
!
These warning labels should be found at the locations specied below. If any of them are missing, immediately
contact Nortek Security and Control for replacements.
REQUIRED SAFETY PRECAUTIONS FOR GATES

xMM271 Installation Instructions MM271 Installation Instructions xi
Technical Specifications
1. Determine Charging Option for Battery: Transformer OR Solar
IMPORTANT:
●The Mighty Mule gate operator is designed and intended for use with a 12 Volt automotive or marine type
battery. The battery must be placed inside a weatherproof case and located within 6 feet from the Control Box.
The 8 foot harness supplied connects the battery to the Control Box.
●The transformer is designed for indoor use. If the transformer can be plugged only into an outside electrical
outlet, a weatherproof cover/housing (available at local electrical supply stores) must be used.
●If your gate is more than 1000 ft. from an AC power source, you will need to use at least 10 watt solar
charging power to charge the battery [FM123]. Refer to the Solar Panel and Gate Activity chart below.
●All low voltage wire used with the Mighty Mule gate operator must be 16 gauge dual conductor, stranded,
direct burial wire [RB509]. Do not run more than 1000 ft. of wire.
NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT
THE SAME TIME. It will damage the control board.
The table and map
illustrate the maximum
number of gate cycles
to expect per day in a
particular area when
using from 10 to 30
watts of solar charging
power prior to the battery depleting to a state
where the unit will not function. The gures
shown are for winter (minimum sunlight).
Accessories connected to your system will
draw additional power from the battery.
Deep cycle marine battery is recommended
for solar and/or high trafc applications.
Before You Begin
POWERING OPTIONS
SOLAR PANEL AND GATE ACTIVITY CHART
Single Gate Winter Ratings Zone 1 Zone 2 Zone 3
12 v single gate (10 watts) solar charger 816 26
12 v single gate (20 watts) solar charger 14 28 38
12 v single gate (30 watts) solar charger 20 44 54
* Power increments are for reference only.
DRIVE
• Low friction screw drive (linear actuator) rated for -5 ºF to +160 ºF (-20 ºC to +71 ºC).
• Powered by a 12 V motor with integral gear reducer. Motor speed reduced to 260 rpm.
• Maximum opening arc of 110º. Approximate opening time (90º): 18 seconds, depending on weight of gate.
POWER
• The system is powered by a 12 Vdc automotive or marine battery.
• Battery charge is maintained by Mighty Mule transformer or optional Mighty Mule Solar Panels.
• IMPORTANT: Never use both transformer and solar panel - this will damage the battery and control board.
• One (1) blade-style fuse is rated for 15 A.
NOTE: The transformer should not be directly connected to any battery. Do not replace fuses with higher ampere rated
fuses; doing so will void your warranty and may damage your control board.
CONTROL
• Microprocessor-based control board for single leaf, pull-to-open gate installations.
• A circuit on the control board regulates charging. "Sleep draw" is 15 mA; "active draw" is 2 to 5 A.
• Auto-memorization of digital transmitter code.
• RF receiver tuned to 318 MHz.
• Opener length with push-pull tube fully retracted is 263/8", mounting point to mounting point. Maximum stroke is 13".
• Adjustable auto-close timer (OFF, 3 to 120 seconds), and Dual Sense Technology Stall Force.
• Power terminal block accommodates a transformer or solar panels.
• Accessory terminal block fully compatible with all Mighty Mule access controls.
• Control board allows connection of edge sensors and photoelectric sensors.
• Audio entrapment alarm sounds if unit encounters an obstruction twice while opening or closing.
MIGHTY MULE 271 GATE OPENER

xii MM271 Installation Instructions MM271 Installation Instructions xiii
E
A
B
C
D
F
Gate Grounding
●For reference only.
Cooper Clad Ground Rod (not included)
Use an 8 foot, 5/8 inch ground rod, positioned
two feet or less from the post and 2 inches or
less above the ground. Available at local home
center or hardware stores.
NOTE: No grounding system absolutely
protects against lightning strikes. If installed
correctly, a grounding system will help
minimize damage to your gate operator.
●The gate must be plumb, level, and swing freely on its hinges.
●The gate must move throughout its arc without binding or dragging on the ground.
●Wheels must NOT be attached to the gate.
● Gates over 250 lb. should have ball bearing hinges with grease ttings.
● Post must be secured in the ground with concrete (minimizes twist/ex when the operator is activated).
●Make sure there is a stable area for mounting the gate bracket (this may require the addition of a horizontal or
vertical cross member).
●We recommend you position the operator near the center-line of the gate to keep the gate from twisting and
exing, and to avoid back-splash from rain.
Copper clad ground rod
(not included)
Ground
Ground
2 Inches or
Less above
ground
Copper ground
rod clamp
Copper Single
Conductor Lug
3/16” Drilled
Pilot Hole
6 ft. deep
or more
Metal gate post
Metal Gate Post
Gate Opener
Control Box
2 ft. or Less
from post
IMPORTANT: CHECK FOR PROPER GATE INSTALLATION
CHECK EXISTING GATE SIZE AND MATERIAL
• Gate size: Up to 12 feet and up to 300 lbs • Type of gate material: Vinyl, aluminum, chain link,
farm tube, wrought iron, wood.
Not rated for use on solid surface gates.
A- Level
B
- Plumb
C
- Free Swinging
D
- Secured Posts in
Concrete
E- Center line Mounting
F- Good Working Hinges (ball bearing
hinges are recommended on gates
over 250 pounds)
3/8” x 1-1/2” Clevis Pin (2)
3/8” x 8” Bolt (2)
8” Nylon Cable Tie (6)
Control Box
Gate Bracket Post Pivot Bracket Post Bracket
Transformer Warning
Signs (2)
Closed Position
Stop Plate
Transmitter (1)
3/8” x 1-1/2” Bolt (1)
5/16” x 1-1/4” Bolt (1)
3/8” Washer (7)
5/16” Washer (1)
3/8” Nut (5) 5/16” Lock Nut (1)
Hairpin Clip (2)
2” Mounting Screw (3)
A
F
Operator Arm
B
GI
E
C
H
D
J K
N
L
Q
S
O
P
M
R
U
T
3/8” Lock Washers (5)
V
3/8” x 2-3/4” Bolt (2)
ITEMS INCLUDED

xiv MM271 Installation Instructions MM271 Installation Instructions 1
7/16” Bit
5/16” Bit
Drill
Pliers
Level
Clamps Adjustable
Wrench
Pen Center
Punch
Hammer
Tape
Measure
Small
Flat Head
Philips Head
Screwdriver
Flat Head
Screwdriver
Wire
Stripper
Hack Saw 1/2”
wrench
9/16”
wrench
●12 Volt automotive or marine battery and a
weather proof case.
●Low voltage wire will be needed to run from
the transformer to the control box; length
depends upon the distance between the
transformer power supply and the control box.
See Transformer Wiring Installation on page 5,
and the accessory catalog.
●PVC conduit.
●If your gate is more than 1000' away from an
AC power source you will need to use at least
one Mighty Mule solar panel to trickle charge
the battery. See the accessory catalog (Do not
use both transformer and solar).
●If you have thin-walled tube or panel gates, see
Recommended Reinforcement Examples after
Step 3 of “Mounting Operator to Gate”.
●Depending on the type of gate, a horizontal
cross member or mounting plate may be
needed to mount the front of the operator and
gate bracket to the gate. See Gate Bracket
Mounting Examples after Step 3 of “Gate
Operator Installation.”
●Surge protection for transformer.
●Some types of installations require u-bolts.
●Additional washers or a metal plate may be
needed for wooden post.
●Weatherproof cover for outdoor outlet and
transformer.
●If the post is larger than 6”, bolts longer than
8” are needed.
ITEMS NOT INCLUDED
TOOLS NEEDED
12
3
55
L
V
O
F
G
T
S
S
E
B
N
N
3
Thin Walled
Tube Gate
Gate
Bracket
1” x 6” Wood Reinforcement
Panel
Gate
Gate
Bracket
Wood or Metal
Reinforcement
(not supplied)
Mounting Plate
Created for
Decorative Gate
(required but not
supplied)
Remove excess bolt length
with hacksaw or bolt cutters
FRONT VIEW SIDE VIEW
Reinforcement and Gate Bracket Mounting
Mufer Clamp
(not supplied)
Gate
Bracket
4
1
2
1" Min. - Pinch-Point Clearance
Top View
1" Min.
7”–13"
2
1
Closed
Position
Open
Position
stroke
2
1
Attach operator to gate and post bracket and secure with required
hardware.
Assemble post bracket parts. Do not completely tighten during
this step.
With Gate in OPEN position, using clamps, secure operator to
gate post and center cross member of gate.
Recommended reinforcement and gate bracket mounting
examples.
Swing gate and operator arm to the CLOSED position-check
clearance/binding by inspecting alignment. Arm stroke should be a
maximum of 13”. TIP: Turning the pivot bracket over gives more
hole alignment options for the post pivot bracket assembly.
Remove clevis pin from the gate bracket and support loose
operator.
Installation
GATE OPERATOR INSTALLATION

2MM271 Installation Instructions MM271 Installation Instructions 3
1
3
511
1
6
2
Q
K
U
7
3
689
10
M
L
T
611
V
OPEN gate and reattach operator with clevis pin. Check to
ensure the operator is level.
Secure post pivot bracket to post bracket with the hardware
provided (Q,K,U) when you have achieved the 1” clearance
shown in Step 5 in both open and closed positions.
Mark middle of post bracket slots on fence post. Mark middle
of gate bracket slots on gate cross support.
Remove clamps, post bracket, gate bracket, and operator. Then
use a hammer and center punch to mark
hole positions.
Drill holes completely through gate post and gate cross support. Attach post bracket assembly to gate post. NOTE: Must be
through bolted.
GATE OPERATOR INSTALLATION
12
3
5
612
T
L
L
V
P
2
1
1
13
2
14 15
4
H
15
1
2
2
1
Attach and secure operator assembly to brackets.Attach gate bracket assembly to gate cross support.
Check for level. Adjust post bracket if necessary. Tighten all bolts and remove excess length on post and gate
bracket bolts with hacksaw.
Remove the arm from the front bracket then attach closed position stop
plate to the leading edge of the gate with one of the following:
• U-bolts—tube and chain link gates (Not included)
• Wood/lag screws—at aluminum/wood supports (Not included).
Position gate stop with gate CLOSED to fence post. Tighten
fasteners. Cut off excess bolt length.
GATE OPERATOR INSTALLATION
CLOSED POSITION STOP PLATE INSTALLATION

4MM271 Installation Instructions MM271 Installation Instructions 5
C
11
1
2
2
POWER
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16
D13
D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tal l a h a s s e e , FL
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
3
POWER
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16 D13 D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tallahassee, FL
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
4”
S9.8874
4
POWER
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16 D13 D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tallahassee, FL
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
Correct Wrong Wrong
Wire Screwed into
wire insulation
Exposed strands
of wire
OFF
POSITION
5
POWER
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16
D13
D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tal l a h a s s e e , FL
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
6
• • • • • •• • • • • • • • •
Locate power outlet and identify wire path to control box.
NOTE: If OUTLET is OUTSIDE use weatherproof cover. Inspect
the wire to insure the prevention of damage.
CONTROL BOX & BATTERY INSTALLATION
Mount control box on piece of treated plywood then attach it to
post or fence using screws.
Locate control box mounting area. IMPORTANT: Be sure to mount
box at least 3 feet from AC power and 3 feet off the ground.
Make sure control box is turned OFF. Place 12 Volt battery and
weatherproof battery box within 6 feet of the control box Attach the
battery harness wires from the control box to the battery terminals.
Tighten the bolts, washers, and nuts and place the cover on the
weatherproof box. IMPORTANT: Do not connect the transformer
or solar panel directly to the battery.
Use PVC conduit from ground up to control box.
Plug in transformer to power outlet. (Use of a surge protector is
highly recommended. If outdoors use weatherproof box.)
TRANSFORMER WIRING INSTALLATION
Strip 1/2” off 2 wires and twist ends. Attach wires to
transformer screw terminals.
With the Control Panel OFF, remove control panel cover by
unscrewing center cover fastener.
Feed 4” of low voltage wire through strain relief into box with
battery wire harness.
Insert black (–) wire into the top CHGR terminal.
Insert the red (+) wire into the 2ND CHGR terminal.
Attach cover back onto the control box.
WARNING
Before digging contact local authorities to locate underground utilities such as electric and gas service.
NOTE: If using a solar panel charging kit, go to page 6.

6MM271 Installation Instructions MM271 Installation Instructions 7
1
Toward
Equator
2
POWER
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16
D13
D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tall ah as see , F L
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
3
POWER
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16 D13 D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tallahassee, FL
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
S9.8874
4”
4
POWER
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16 D13 D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tallahassee, FL
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
Correct Wrong Wrong
Wire Screwed into
wire insulation
Exposed strands
of wire
5
POWER
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16
D13
D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tall ah as see , F L
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
6
RED RED
BLACK BLACK
attach BLACK to the ‘COM’ terminal
attach RED to the ‘CHGR’ terminal
Solar Panels connect in PARALLEL
Position solar panel facing sun and in a non-shaded open area
that allows 8 hours of direct sunlight for a full charge.
SOLAR PANEL INSTALLATION
For multiple solar panels, wire the panels in parallel as shown.
With the Control Panel OFF, remove control panel cover by
unscrewing center cover fastener.
Feed 4” of the solar panel wire through strain relief into control
box.
Insert red (+) wire into the top CHGR terminal and the black (–)
wire into the COM terminal.
Reattach cover. Turn power on.
12
ON/OFF Switch
Take hold of your transmitter. Turn off control box. Press and hold a preferred transmitter
button while sliding the ON/OFF switch to the ON position.
Continue to hold transmitter button for 8 - 10 seconds. You will
hear a single or a series of beeps, followed by a pause then a
single beep. Release transmitter’s button. Your personal code is
now programmed. NOTE: The button you chose will be the button
used to operate your system.
Programming a MMT103 Transmitter.
TRANSMITTER PROGRAMMING
1. Adding additional MMT103 transmitters - Repeat the above process for up to a total of 20 transmitters.
2. Erasing an individual MMT103 transmitter - Repeat the above programming process to erase/delete a
transmitter.
3. Erase all - this process will erase all transmitters.
a. Press and hold down the button on a programmed transmitter.
b. Turn the unit off while holding down the button on the transmitter.
c. Continue to hold down the button for at least 10 seconds. The status LED will ash and then illuminate
solid. This indicates the Erase All procedure has completed.
4. Program the FM135 type transmitter (see Programming an FM135/134 Dip Switch Style Transmitter,
next page).

8MM271 Installation Instructions MM271 Installation Instructions 9
1
POWER
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16
D13
D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tal lahasse e , FL
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
2
3
ON/OFF
SWITCH
4
SETTING CLOSED LIMIT POSITION
TRANSMITTER PROGRAMMING
With gate in the open position, (arm retracted) turn the
control box ON/OFF switch to the off position. Press and
hold the transmitter while sliding the ON/OFF switch to the
ON position and you will hear a single or a series of beeps
followed by a pause then a single beep. At that point release
the transmitter button. This process may take 8 - 10 seconds.
Press and release the learned transmitter button; gate should
start closing. When the gate reaches the desired CLOSED
position, press and release the transmitter button again.
NOTE: If your gate stops and reverses before it fully closes, you
may need to increase the stall force. (See page 10)
Press and release the transmitter button again; gate should
start opening. Once the gate reaches the OPEN position, a
single audible alarm will sound to indicate the limit is set.
Gate operator’s closed position is now set. Press and release
transmitter to close gate for normal operation.
WARNING: Changes, modications or adjustments not expressly approved by Nortek Security and Control, LLC could void the user’s
authority to operate this equipment. There Are No User Serviceable Parts.
NOTICE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 the FCC. These limits are designed to provide reasonable protection
against harmful interference in a residential 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.
This device complies with Part 15 of the FCC Rules. 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.
34
ON/OFF Switch
Replace and secure back cover of the opener remote.
Turn off control box. Press and hold a transmitter button while sliding
the ON/OFF switch to the ON position. Continue to hold transmitter
button for 8 - 10 seconds. You will hear a single or a series of beeps,
followed by a pause then a single beep. Release transmitter’s button.
Your personal code is now programmed. NOTE: The button you chose
will be the button used to operate your system.
• An innite number of the transmitters can be used, provided that
the dip switches are set to match one another.
Remove back cover of the opener remote. Flip opener remote over. Use small screwdriver to move switches
to random positions. If you have more than one transmitter, now
is a good time to set them all with the same code.
1
123456789
2
All Mighty Mule transmitters are set to a standard code at the factory. However, for your safety and security, we
strongly recommend that you replace the factory setting with your own personal code. Follow the directions below:

10 MM271 Installation Instructions MM271 Installation Instructions 11
2
POWER
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16 D13 D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tallahassee, FL
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
MIN MAX
STALL
FORCE
POWER
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16 D13 D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tallahassee, FL
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
MIN MAX
AUTO CLOSE
TIME
3 4
POWER
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16
D13
D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tall ah as see , F L
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
1
POWER
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16
D13
D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
PGOK200 Rev. XC
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
GTO Inc. Tall ah as see , F L
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
Do not use the Dual Sense Stall Force adjustment to compensate for a
gate that is sticking or binding.
Excessive Stall Force may cause damage to the gate operator,
gate system, Bodily Injury or Death.
The Stall Force adjustment controls the amount of force the operator
will apply against an obstruction before it stops and reverses direction.
The adjustment on the control board operates like a volume control
on a radio. It controls the amount of force the operator will apply to an
obstruction before it automatically reverses direction.
The Stall Force adjustment is located on the control board. Turn the
“STALL FORCE” arrow in the center of the potentiometer with small
flat head screwdriver. Adjust the sensitivity to the point where the gate
operates without obstructing from its own weight or the wind conditions
in your area.
You may need to increase the stall force in cold weather due to
increased resistance from gate hinges. However, the adjustment
must remain as near to minimum as possible and when the weather
improves decrease the setting to the appropriate position.
NOTE: The stall force setting must at the lowest (minimum) possible
position.
Close control box, unless you are adding additional accessories
If adding additional accessories, see next page.
Turn the “AUTO CLOSE TIME” arrow in the center of the
potentiometer with small flat head screwdriver to determine how
long the gate will remain open before it automatically closes. The
limits are OFF and 3 - 120 seconds. The factory setting is OFF.
SETTING DUAL SENSE DETECTION & AUTO CLOSE TIMER
For safety reason the Dual Sense Stall Force setting on the Mighty Mule control
board comes from the factory set at set at the 10 o’clock position. This setting
may need adjustment depending on the size and weight of the gate.
ALWAYS KEEP SAFETY AT THE TOP OF YOUR LIST WHEN ADJUSTING OR
SERVICING YOUR GATE SYSTEM.
CAUTION
CONNECTING ADDITIONAL DEVICES
Wiring Accessories through Control Board Wiring Knockout
Carefully remove wiring
knockout (on cover) to insert
accessory wires.
Remove control box cover.
Reattach control box cover.
Insert accessory wires
through the knockout and
route to the accessory input
terminals on the control
board.
(See pg. 12)
ON/OFF Switch
Accessory Wires
(Photo beams, keypad, etc.)
Mighty Mule strongly recommends the use of additional obstruction detection devices. However, we do not
endorse any specic brand names. Only use products that are listed to be in compliance with any applicable UL
safety standards and national and regional codes.
PLEASE NOTE: Contact sensors, non-contact sensors, shadow loops, etc. are not included with the Mighty
Mule. Refer to the sensor manufacturer’s instructions for information about installing accessory devices.
The Mighty Mule ONLY accepts accessory devices with normally open dry contact outputs.
Make sure the operator power switch is turned OFF before connecting ANY
device wiring to the terminals of the controller. Unplugging the transformer
does not turn power to the operator off.
WARNING
With the Control Panel OFF, remove control panel cover by unscrewing
center cover fastener.

12 MM271 Installation Instructions MM271 Installation Instructions 13
1CHGR: Power Input Terminals:
• Input terminals for transformer.
2CHGR: Power Input Terminals:
• Input terminals for transformer or solar panel.
3 COM:
• Common/Negative terminal for accessory devices
and negative wire from solar panel(s).
4SAFETY: (Typically for use with photo beam device,
loop detector or other non-contact sensors)
• Activation of this input while the gate is closing, or at
a position other than fully open or fully closed will cause
the gate to stop and return to the opened position.
• Activation of this input while the gate is opening has
no effect. (gate will continue to open)
• Activation of this input while the gate is open will prevent
gate from closing.
• Activation of this input while at open limit will restart the
auto close time (if enabled).
5EXIT: (Typically for use with exit loop or wand)
• Activation of this input will open the gate if it’s not already
at the open position.
• Activation of this input while at open limit will restart the
auto close time (if enabled).
6CYCLE: (Typically for use with doorbell button or hard wired keypad)
• Each activation at this input will cycle the operation
as follows:
….→OPEN →STOP →CLOSE →STOP →OPEN →…
7EDGE: (Typically for use with contact edge sensor)
• Activation of this input while gate is moving will cause it to
reverse direction for 2 seconds.
• Activation of this input while idle will prevent gate from running.
8COM:
• Common/Negative terminal for accessory devices.
9LOCK +:Positive terminal to connect electro-mechanical lock. (FM143)
10 LOCK - : Negative terminal to connect electro-mechanical lock. (FM143)
4
7
5
6
8
POWER
OFF 120
AUTO CLOSE
TIME
MIN MAX
STALL
FORCE
ON OFF
SG1
ED1
K1
06
AVR-ISP
D1
C2
C7
C15
LED3
D15
R20
IC4
D16 D13 D14
K2
BATT- BATT+
STATUS
ANT SHLD
S9.8874
EDGE
COM
LOCK+
LOCK -
M_BLK
M_RED
VAR2
GRN
VAR3
VAR3
VAR1
VAR4
VAR5
PF1
VAR6
WHT
CYCLE
EXIT
SAFETY
COM
CHGR
CHGR
1
2
3
9
10
NOTES:
• All accessory inputs are dry-contact, normally open, inputs. DO NOT apply external voltage sources to these inputs.
• All accessory inputs are connected with respect to COMMON terminal.
LOCK OUTPUTS
CHARGE POWER
INPUTS
ACCESSORY INPUTS
CONTROL BOARD CONNECTIONS
POWER
LED3
EDGE COM
LOCK+ LOCK -
M_BLK M_RED
GRN
VAR3
VAR3
VAR1
VAR4 VAR5 VAR6
CYCLE
EXIT
SAFETY
COM
CHGR CHGR
Photo Beams
Mighty Mule
Push Button Control
Mighty Mule
Vehicle Sensor
Refer to Vehicle Sensor
manual for additional
information if needed.
Edge Sensor
Automatic Game Lock
NOTE: Connections are for typical applications.
For additional connection options not illustrated
here refer to the accessory manual for details.
6
3
8
4
8
7
1 32 4 5 8 9 10
6 7
9
5
8
+-
Red
Blue
Black
Shield
Yellow
10
CONNECTING ACCESSORIES

14 MM271 Installation Instructions MM271 Installation Instructions 15
●Monthly, test the obstruction and entrapment protection systems.
●Monthly, service the gate operator (make sure the power switch is OFF). Clean extended operator arm with a soft,
dry clean cloth.
●On all gates weighing 250 lb. or more, routinely grease the ball bearing hinges at least 4 times a year; more
frequently if the gates are near a coastal area.
●Monthly, turn off the power switch and disconnect the Mighty Mule and move the gate to make sure the gate is
moving freely without sticking or binding. Lubricate the hinges or repair the gate as required before reattaching
the Mighty Mule.
●Monthly, check the gate system for potentially entrapments from new landscaping or construction. Eliminate or
guard as required.
●Monthly, check that the warning signs are mounted on each side of the gate and clearly visible. Replace the signs
if they are missing or damaged.
●Replace batteries every 2-3 years and properly recycle old batteries.
AUDIBLE FEEDBACK
Symptom Diagnosis Check
1 or more short beeps upon
power up
Circuit Board Powered
Up & Ready
hNormal Operation
Rapid beeping
hNo battery preset
hCircuit Board Senses an
Obstruction
hBlown fuse in battery
harness cable
hPath of Gate
hGate for Level and Plumb
hStall Force Adjustment
hDisconnect Obstruction Detection Devices
hBattery connections
hCheck fuse
1 beep every 20 seconds off Low Battery Condition hTransformer or Solar Panel Voltage
hCharge the battery if solar conditions have been poor
hBattery Harness Connections
hBattery Under Load
2 beeps every 2 seconds Position sensor is short circuit. hArm Power Cable for Damage
1 beep every 2 seconds off Position sensor is open circuit. hArm Power Cable for Damage
1 beep when attempting to
run the gate
Blown fuse
Battery is low or damaged
Loose Connection
hCheck and replace fuse
hTest battery voltage
hCheck all connections
Additional information can be found by contacting Nortek Security and Control.
If your gate operator does not function properly after it is installed, use this guide before calling the Nortek
Security and Control Service Department.
Troubleshooting Guide
Maintenance VISUAL FEEDBACK
Symptom Diagnosis Check
Power (green) ON AC or Solar Power Present Normal Operation
Power (green) OFF No AC or Solar Power Transformer:
hBreaker or GFI
hPower at AC outlet.
hOutput of Transformer.
hVoltage on wire at 18 VAC Input
Solar:
hSolar Panel Wires Reversed
hWeather
hSolar Panel Placement
hOutput of Solar Panel
hVoltage on wire at Solar Input
Status (amber) Receiving RF Signal hCheck for a stuck transmitter
hReceiving RF interference

16 MM271 Installation Instructions MM271 Installation Instructions 17
1. First use the procedures found in the Maintenance
& Troubleshooting Guide (see page 14 and 15).
2. For 24 hour 7 days a week trouble shooting and
support online go to our TECH WIZARD site at
www.mightymule.com
3. If you are unable to solve the problem, call the
Tech Service Department at [phone], or
[phone].
4. If repair or replacement of your gate operator is
necessary, the Service Department will assign a
Return Authorization (RA) number.
5. Include a copy of your receipt and securely pack the
component(s) authorized for return to the factory.
Write the RA number issued to you on the outside
of the package in LARGE BOLD PRINT. Ship the
package(s) freight prepaid to:
Nortek Security and Control, LLC • 3121
Hartseld Road • Tallahassee, Florida • USA 32303
If your Mighty Mule Gate Opener is not operating properly, please follow the steps below:
NOTE: Products returned to Nortek Security and Control without a Return Goods Authorization
(RGA) number in LARGE BOLD PRINT on the outside of the package WILL NOT be accepted. Items
returned to Nortek Security and Control freight collect WILL NOT be accepted. Items returned
without proof of purchase will not be repaired under warranty.
The Mighty Mule Technical Service Department is open
Monday – Friday 8:00 A.M. – 7:00 P.M. (Eastern Time)
Fax [phone] • Web site: www.mightymule.com
Telephone [phone]
For 24 hour 7 days a week trouble shooting and sup-
port online go to our TECH WIZARD site at
www.mightymule.com
Repair Service
For Your Records
Please record the product serial number (located on the right hand side of the control box), and the date and place of purchase in the
spaces provided below. Refer to this information when calling Nortek Security and Control for service or assistance with your automatic
gate operator.
Serial Number ____________________________________________
Date of Purchase _________________________________________
Place of Purchase ________________________________________
Remember to keep all receipts for proof of purchase.
VOLTAGE READINGS
18 Vac Transformer _________________________ 18.0 to 22.0 Vac
5 W Solar panel (single) _____________________ 18.0 to 22.0 Vdc
Measure voltage at panel and control box.
12 V Battery _______________________________ 12.0 to 13.5 Vdc
Charging circuit ____________________________ 12.0 to 14.8 Vdc
Measure voltage with battery connected
CONVERSION CHART
Converting Metric Units to English Equivalents
When You Know Multiply By To Find Symbol
Centimeters 0.3937 Inches in. (or “)
Meters 3.2808 Feet ft. (or ‘)
Kilograms 2.2046 Pounds lb. (or #)
Converting English Units to Metric Equivalents
When You Know Multiply By To Find Symbol
Inches 2.5400 Centimeters cm
Feet 0.3048 Meters m
Pounds 0.4535 Kilograms kg
Converting Temperature
deg. Celsius (ºC x 1.8) + 32 deg. Fahrenheit ºF
deg. Fahrenheit (ºF - 32) ÷ 1.8 deg. Celsius ºC

18 MM271 Installation Instructions MM271 Installation Instructions 19
Accessories are Available From Your Retail Store
AUTOMATIC
GATE LOCK
®
ELECTRONIC SECURITY LOCK
Solar Panel (FM123)
The Solar Panel is a 10 watt solar powered battery charger for use with the Mighty Mule 271 gate operator systems. Particularly
suited for remote installations, each Solar Panel comes with tubular steel support, mounting clips, wire connectors, and 10
ft. of low voltage wire (see Low Voltage Wire for additional wire). The Mighty Mule control board has clearly labeled terminal
connections for easy installation of the Solar Panel. Installation in some regions of the world will require multiple solar panels for
adequate charging power.
Push Button Control (FM132)
Unlit doorbell button for remote entry or exit control. Wires directly to the control board and uses 16 gauge stranded, dual
conductor low voltage wire (sold separately).
Pin Lock (FM133)
The Pin Lock substitutes for the clevis pin at the front end of the Mighty Mule gate operators. Helps prevent theft of the operator
from the gate, while allowing quick release of the operator.
Key Chain Two Button Transmitter (FM134)
The Key Chain Transmitter is a dual button version of the Mighty Mule single button entry transmitter and has the same adjustable
code settings. Used for 2 gates or 1 gate and garage door (when used with in conjunction with a garage door receiver – RB709U-NB).
(Battery is included.)
Single Button Transmitter (FM135)
The Mighty Mule entry transmitter, with adjustable code settings, is standard equipment with all Mighty Mule systems.
(Battery is included.)
MMK200 Keypad
The Mighty Mule Wireless Keypad is designed to control access to all Mighty Mule Garage Door Openers. This keypad features a
LED back light that allows you to see numeric keys throughout dark or unfavorable weather conditions.
Mounting Post (FM100) - In Ground
This black powder coated pedestal is designed to provide convenient access to your keypad, wireless intercom, or other access
control device from your vehicle. With its break down design it is easy to install and works well in most standard applications.
Surface Mount Flanges (F102) and Extensions (F103) for added height are available.
Mighty Mule Vehicle Sensor (FM138)
The Gate Opening Sensor is designed for residential and agricultural applications and is compatible with most Mighty Mule
automatic gate operator models. The Sensor is an electromagnetic sensor, which offers 'hands free' operation of the Mighty Mule
Gate Operator with a 12 ft. radius of detection of vehicles in motion.
Automatic Gate Lock Pull-to-Open (FM143)
AMUST for added security. Solenoid driven, with a steel housing. Used with Mighty Mule DC swing gate operating systems for
maximum stability and security. Comes with a keyed manual release.
Accessories
Replacement Transformer (RB571)
Standard 18 volt, 2260 mA, AC transformer for maintaining the battery with the Mighty Mule gate operator.
Garage Door Receiver (RB709U-NB)
The Garage Door Receiver allows you to use the same 2 button Mighty Mule entry transmitter to operate your gate operator and
your garage door operator. Compatible with most garage door operators.
Driveway Alarm (FM231)
This device alerts you of vehicles entering your driveway (with or without an automated gate). The indoor base station signals you
with a door chime when a vehicle passes the driveway sensor.
Wireless Driveway Vehicle Sensor (FM130)
Automatically activates gate operator “Hands-Free” when a vehicle exits the property. 100 ft. range between transmitter and
receiver. Easy installation.
If you have a question about any special order item, call 1-800-543-4283
The contents of all material available on this installation manual are copyrighted by Nortek Security and Control, LLC (“Nortek Security and Control”), unless otherwise indicated. All
rights are reserved by Nortek Security and Control, and content may not be reproduced, downloaded, disseminated, published, or transferred in any form or by any means, except with
the prior, written permission of Nortek Security and Control. Any reprinting of Nortek Security and Control publications is by permission only. Copyright infringement is a violation of
federal law.
Mighty Mule¨, E-Z Gate¨, Nortek Security and Control¨, “Dual Sense Technology” are registered trademarks of Nortek Security and Control, LLC, America’s DIY Automatic Gate Openers
is a trademark of Nortek Security and Control, LLC and are the exclusive property of Nortek Security and Control, LLC (“Nortek Security and Control”).
All rights are reserved by Nortek Security and Control, and these marks may not be used, in any for without the prior, written permission of Nortek Security and Control.
®
MMT103
The MMT103 Code Safe digital transmitter is a wireless radio control designed for use with Mighty Mule garage door
openers and can also be programmed to your Mighty Mule gate openers. One remote for two or three devices.
Wireless Entry Intercom / Keypad (FM136)
Allows owner to screen guest at the gate before allowing access to the property. Keypad also allows owner to give up to 25
programmable entry codes to family, friends or approved delivery personnel. Codes can be permanent or temporary. Up to
500 feet reception.
Additional base stations available (F3101MBC).
Low Voltage Wire (RB509)
The 16 gauge, stranded, dual conductor Low Voltage Wire is for connecting the AC powered transformer, or the Solar Panel
to the control board. Also used for the connection of accessories, such as locks, keypads, push buttons and other wired
control devices. This specially designed wire is UV treated, PVC coated and ready for direct burial. Available in 1000' rolls or
special lengths.
®

Gate Operator Installation Checklist
Telephone Mighty Mule Sales: 1-800-543-4283 • Fax [phone]
or Mighty Mule Technical Service: 1-800-543-1236 • Fax [phone]
www.mightymule.com
Copyright©2019 Nortek Security and Control, LLC.
❑1. The gate has been checked to make sure it is level and moves freely in both directions.
❑2. Potential pinch areas have been guarded so as to be inaccessible OR have sensing edges and/or
photo beam obstruction detection devices installed.
❑3. The installer has installed one or more contact or non-contact obstruction sensing devices, if
required for this installation.
❑4. If pedestrian trafc is expected, a separate pedestrian gate has been installed, a minimum of
seven feet from the gate system. All pedestrian trafc must use the pedestrian gate.
❑5. Warning signs have been installed on each side of the gate in highly visible locations. These
signs must remain at all times.
❑6. There are no controls installed on the gate operator, or within 10 feet of the gate.
❑7. The Dual Sense Technology™ feature has been properly adjusted to the minimum operational
setting for your application..
❑8. Reviewed and understand all of the operational functions, obstruction sensing devices, warning
beeper and reset, etc.
❑9. Review and understand the proper use of the operator’s manual disconnect feature. The manual
disconnect must never be used while the gate is in motion. The power switch must be turned off
before using the manual disconnect and disengaging the operator.
❑10. Reviewed all safety instructions, and keep the safety instructions and owner’s information sheets
for reference.
❑11. Review and understand the maintenance schedule for both the gate and the gate operator.