Mighty Mule FM-352 - All Gate Operator Manuals

Mighty Mule FM-352 - All Gate Operator Manuals
Installation Manual for the
®
E-Z GATE OPENER
352
UL325 SERIES
WARNING!
This equipment is similar to other gate or door equipment and meets or exceeds
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 GTO shall in no event be liable for direct,
indirect, incidental, special or consequential damages or loss of profits 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 GTO 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 opener. This gate opener produces a high level
of force. Stay clear of the unit while it is operating and exercise caution at all times.
All automatic gate openers are intended for use on vehicular gates only.
GTO Sales: (800) 543-GATE (4283) or (850) 575-0176 • Fax (850) 575-8912 or
GTO Technical Service (800) 543-1236 or (850) 575-4144
For 24 hr/day, 7 day/week Technical Service visit http://support.gtoinc.com/support/troubleshooter.aspx
2008 Gates That Open, LLC
©
rev - 02/25/10
For more information on Mighty Mule’s full line of Automatic Gate Openers and Access Controls visit our website at www.mightymule.com
R352INST
This product meets and exceeds the requirements of UL 325, the standard which regulates gate opener safety,
as established and made effective March 1, 2000, by Underwriters Laboratories Inc.
The Mighty Mule® Gate Opener is intended for use with vehicular swing gates. The opener can be used in
Class I, Class II and Class III applications. Vehicular gate opener class categories
Residential Vehicular Gate Opener-Class I: A vehicular gate opener (or system) intended for use in a
home of one-to-four single family dwelling, or a garage or parking area associated therewith.
Commercial/General Access Vehicular Gate Opener-Class II: A vehicular gate opener (or system)
intended for use in a commercial location or building such as a multifamily housing unit (five or more
single family units), hotel, garages, retail store, or other building servicing the general public.
Industrial/Limited Access Vehicular Gate Opener–Class III: A vehicular gate opener (or system)
intended for use in an industrial location or building such as a factory or loading dock area or other
locations not intended to service the general public.
Conversion Chart
Converting Metric Units to English Equivalents
When You Know
Multiply By
To Find
Symbol
centimeters
meters
kilograms
0.3937
3.2808
2.2046
inches
feet
pounds
in. (or ")
ft. (or ')
lb. (or #)
Converting English Units to Metric Equivalents
When You Know
Multiply By
To Find
Symbol
inches
feet
pounds
2.5400
0.3048
0.4535
centimeters
meters
kilograms
cm
m
kg
deg. Fahrenheit
deg. Celsius
ºF
ºC
Converting Temperature
deg. Celsius
deg. Fahrenheit
(ºC x 1.8) + 32
(ºF-32) ÷ 1.8
FOR YOUR RECORDS
Please record the product serial number (located on the rear of opener arm),
and the date and place of purchase in the spaces provided below. Refer to this
information when calling GTO for service or assistance with your automatic
gate opener.
Serial Number ____________________ Date of Purchase ____________________
Place of Purchase ____________________
Remember to keep all receipts for proof of purchase.
Table of Contents
Gate Opener Class Categories------------------------------------------------------------- inside cover
Units and Standards Conversion Chart------------------------------------------------- inside cover
PLEASE READ THIS FIRST!-------------------------------------------------- page iii
KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE
Important Safety Instructions ----------------------------------------------- page 1
Disconnecting the Opener-------------------------------------------------------------- page 1
Important Safety Instructions for the Consumer-------------------------------- page 2
Secondary Means of Protection Against Entrapment------------------------- page 5
Required Safety Precautions for Gates--------------------------------------------- page 6
Warning Signs and Labels-------------------------------------------------------------- page 7
Installation ------------------------------------------------------------------------- page 8
Parts List-------------------------------------------------------------------------------------- page 8
Tools and Items Needed for Installation-------------------------------------------- page 9
Technical Specifications -------------------------------------------------------------- page 10
Installation Overview --------------------------------------------------------------------- page 11
Installation of the Mounting Hardware---------------------------------------------- page 12
Mounting the Master Opener---------------------------------------------------------- page 16
Mounting the Second Opener--------------------------------------------------------- page 16
Installation of the Closed Position Stops------------------------------------------ page 16
Trench and Lay Conduit for Wiring-------------------------------------------------- page 19
Preparing To Connect The Wires ------------------------------------------- page 19
Attaching Master Battery and Communication Cables----------------------- page 20
Attaching Second Battery and Communication Cables --------------------- page 21
Powering Options: Transformer or Solar------------------------------------------- page 22
Connecting the Battery------------------------------------------------------------------ page 23
Connecting the Transformer----------------------------------------------------------- page 24
Connecting Solar Panel(s)-------------------------------------------------------------- page 26
Master Control Board Settings --------------------------------------------- page 26
DIP Switches-------------------------------------------------------------------------------- page 26
Dual Mode DIP Switches---------------------------------------------------------------- page 26
Stall Force and Auto-Close------------------------------------------------------------- page 27
Installing the Receiver ------------------------------------------------------------------ page 28
Setting the Closed Position Limit----------------------------------------------------- page 29
Setting Your Personal Transmitter Code -------------------------------- page 30
Connecting Additional Safety Devices ---------------------------------- page 31
Control Board Connections ------------------------------------------------- page 32
Connecting Accessories ------------------------------------------------------ page 33
Routing Wires Through the Access Panel - ---------------------------- page 34
Final Step - ------------------------------------------------------------------------ page 35
Push to Open Installation ----------------------------------------------------- page 36
Setting the Open Position Limit - ------------------------------------------- page 37
Visual and Audible Diagnostic Indicators ------------------------------ page 39
Repair Service ------------------------------------------------------------------- page 41
Column Installation Information ------------------------------------------- page 42
Accessory Catalog ------------------------------------------------------------- page 43
®
E-Z GATE OPENERS
PLEASE READ THIS FIRST!
Thank you for purchasing a Mighty Mule® 352 E-Z Gate Opener—GTO's "do-it-yourself" automatic gate
opener! When correctly installed and properly used, your Mighty Mule® 352 E-Z Gate Opener will give
you many years of reliable service. Please read the following information and watch the enclosed video to
ensure you have the correct system for your particular needs. Furthermore, this manual and the video will
enable you to properly install your Mighty Mule® 352 E-Z Gate Opener.
The Mighty Mule® 352 E-Z Gate Opener is designed for installation on a pull-to-open dual gate leafs
(gates that open into the property). By purchasing an accessory bracket (FM148), the Mighty Mule®
352 E-Z Gate Opener can accommodate a push-to-open dual gate leafs (gates that open out from the
property). The gates must not exceed 8 feet and 550 pounds or exceed 16 feet and 150 pounds (please
see Technical Specifications on page 10). The Mighty Mule® 352 EZ Gate Opener can be used on vinyl,
aluminum, chain link, farm tube, and wrought iron gates.
Use on solid (surface) gates is not recommended. Solid surface gates have a
high resistance to the wind. If the wind is strong enough, the opener will obstruct
and stop, blow fuses, or may damage the equipment.
The Mighty Mule® 352 E-Z Gate Opener accommodates extra transmitters, digital keypads, solar panels,
push buttons, automatic gate locks, and other access control products. These optional accessories (see
the enclosed 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
GTO Sales Department (800-543-GATE).
The Mighty Mule® 352 E-Z Gate Opener features adjustable obstruction sensing. This safety feature
makes the gate stop and reverse direction within 2 seconds when it comes in contact with an obstruction.
MIN is the factory setting; meaning the gate will exert the minimum force on an obstruction before it stops
and reverses direction.
The Mighty Mule® 352 E-Z Gate Opener 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.
PLEASE NOTE—If your application requires any of the following:
Slide gates;
Heavy duty or commercial uses;
Professional installation;
please call GTO at (800) 543-GATE [4283] or (850) 575-0176 for information about our GTO/PRO
professional line of gate openers and accessories. Our Sales Department will be glad to give you the name
and phone number of a GTO/PRO dealer near you.
BEFORE YOU BEGIN TO INSTALL YOUR AUTOMATIC GATE OPENER:
watch the enclosed video and read these instructions carefully and completely
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 opener safety and proper use of the gate opener.
iii
IMPORTANT SAFETY INSTRUCTIONS
Because automatic gate openers produce high levels of force, consumers need to know the potential
hazards associated with improperly designed, installed, and maintained automated gate opener systems.
Keep in mind that the gate opener is just one component of the total gate operating system. Each
component must work in unison to provide the consumer with convenience, security, and safety.
This manual contains various safety precautions and warnings for the consumer. Because there are many
possible applications of the gate opener, the safety precautions and warnings contained in this manual
cannot be completely exhaustive in nature. They do, 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.
Precautions and warnings in this manual are identified with
this warning symbol. The symbol
identifies conditions that can result in damage to the opener or its components, serious injury, or death.
Because GTO automatic gate openers are only part of the total gate operating system, it is the
responsibility of the consumer to ensure that the total system is safe for its intended use.
To Manually Open and Close the
Gate, Follow the Procedure Below:
CAUTION: The gate will move freely and uncontrolled when the gate
opener is removed from the gate. ONLY disconnect the opener when the
opener power switch is OFF and the gate is NOT moving.
Disconnecting the Opener
1. Turn opener power switch OFF.
2. Remove hairpin clip, clevis pin, and
bushing from the front mounting point.
3. Remove the opener from the mount.
The gate can be opened and closed manually
when the opener is disconnected.
Front Mount
Clevis Pin
Gate Bracket
IMPORTANT: NEVER allow opener arm to hang by the
front mount - it will break from the arm weight.
CAUTION: Because the Mighty Mule gate
opener is battery powered, disconnect the opener
ONLY when the power switch on the opener is
turned OFF. Unplugging the transformer does not
turn power to the opener OFF.
Bushing
Hairpin Clip
NOTE: Substitute a Pin Lock (FM133) for the clevis pin
on the front mount only of the gate opener to prevent
unauthorized removal of the opener from the gate
(see Accessory Catalog). M i g h t y M u l e 3 5 2 1
IMPORTANT SAFETY INSTRUCTIONS
For The Consumer
WARNING: To reduce the risk of injury or death:
1.
2.
READ AND FOLLOW ALL INSTRUCTIONS. Failure to meet the requirements set forth in the instruction
manual could cause severe injury and/or death, for which the manufacturer cannot be held responsible.
When designing a system that will be entered from a highway or main thoroughfare, make sure the
system is placed far enough from the road to prevent traffic congestion.
3.
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.
4.
The gate and gate opener installation must comply with any applicable local codes.
I. Before Installation
1. Verify this opener is proper for the type and size of gate, its frequency of use and the proper class rating.
2.
3.
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 opener and safety devices used with the system.
Review the operation of the system to become familiar with its safety features. Understand how to
disconnect the opener for manual gate operation (see page 1).
4.
This gate opener is intended for vehicular gates ONLY. A separate entrance or gate must be installed
for pedestrian use (see page 6).
5.
Always keep people and objects away from the gate and its area of travel. NO ONE SHOULD CROSS
THE PATH OF A MOVING GATE.
6.
Pay close attention to the diagram below and be aware of these areas at all times.
ZONE 1
ZONE 2
ZONE 2
ZONE 5
ZONE 4
Gate in the
Open Position
2
ZONE 3
ZONE 3
Driveway
Entrapment Zones for a
Pull-To-Open Application
Mighty Mule 352
ZONE 5
ZONE 4
Gate in the
Open Position
IMPORTANT SAFETY INSTRUCTIONS
Entrapment Zones for a proper Pull-To-Open installation:
Zone 1 – leading edge of the master and second gate.
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 opener and gate.
II. During Installation
1.
Install the gate opener on the inside of the property and fence line. DO NOT install an opener 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 fingers or hands could be pinched.
3.
4.
Devices such as contact sensors (safety edges) and non contact sensors (photo beams) provide
additional protection against entrapment.
If push buttons or key switches are installed, they should be within sight of the gate, yet 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 opener.
5.
Do not activate your gate opener 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 opener controls in order to prohibit unauthorized use of the gate.
Pull-To-Open
Application
10'
10'
10'
Moving Gate
Area
10'
Moving Gate
Area
Driveway
10'
NEVER INSTALL
any control device
within gray area
10'
M i g h t y M u l e 3 5 2 3
IMPORTANT SAFETY INSTRUCTIONS
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 become damaged, illegible or missing, replace them immediately. Contact GTO for
free replacements.
2.
The gate is automatic and could move at any time, posing a serious risk of entrapment. No one should
be in contact with an activated 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 controls away from children and unauthorized users; store controls where children and
unauthorized users do not have access to them.
6.
KEEP GATES PROPERLY MAINTAINED. Always turn power to opener OFF before performing any
maintenance. Clean the push-pull tube with a soft, dry cloth and apply silicone spray to it at least once
per month. Grease hinges, spray push pull tube with high quality silicone spray.
7. To operate this equipment safely, YOU must know how to disconnect the opener for manual gate
operation (see page 1). If you have read the instructions and still do not understand how to disconnect
the opener, contact the GTO Service Department.
8. Disconnect the opener ONLY when the power is TURNED OFF and the gate is NOT moving.
9.
Make arrangements with local fire and law enforcement for emergency access.
10. Distribute and discuss copies of the IMPORTANT SAFETY INSTRUCTIONS 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 opener are aware of the
dangers associated with automated gates. In the event you sell the
property with the gate opener or sell the gate opener, provide a copy
of these safety instructions to the new owner.
Additional copies of this manual can be obtained by downloading
one from the Mighty Mule® web site (www.mightymule.com), by
contacting GTO, Inc., at 3121 Hartsfield Road, Tallahassee, Florida
32303 or by calling 1-800-543-4283 and requesting a duplicate copy.
One will be provided to you free of charge.
4
Mighty Mule 352
IMPORTANT SAFETY INSTRUCTIONS
Secondary Means of Protection Against
Entrapment
As specified by Gate Opener Safety Standard, UL 325 (30A.1.1), automatic gate openers shall have
an inherent entrapment sensing system, and shall have provisions for, or be supplied with, at least one
independent secondary means to protect against entrapment. The Mighty Mule® 352 utilizes Type A, an
inherent (i.e., built-in) entrapment sensing system as the primary type of entrapment protection. Also, the
Mighty Mule® has provisions for the connection of Type B2 protection to be used as the secondary type
of entrapment protection.
1. For gate openers utilizing a contact sensor (e.g., safety edge sensor– Type B2) in accordance with
UL 325 (51.8.4 [i]):
A.
B.
C.
One or more contact sensors shall be located at the leading edge, bottom edge, and post edge, both inside and outside of a vehicular swing gate system.
A hard wired contact sensor shall be located and its wiring arranged so that the communication between the sensor and the gate opener is not subjected to mechanical damage.
A wireless contact sensor such as one that transmits radio frequency (RF) signals to the gate opener for entrapment protection functions shall be located where the transmission of the signals are not obstructed or impeded by building structures, natural landscaping or similar obstruction.
A wireless contact sensor shall function under the intended end-use conditions.
Leading Edge Contact Sensor
on both sides of the gate
Vehicular Gate
Post Edge Contact Sensor
on both sides of the gate
Vehicular Gate
Bottom Edge Contact Sensor
on both sides of the gate
Post Edge Contact Sensor
on both sides of the gate
ENTRAPMENT ALARM (UL 325; 30A.1.1A)
The Mighty Mule® 352 Gate Opener is designed to stop and reverse within 2 seconds when the
gate comes in contact with an obstruction. Additionally, these openers 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 opener receives an intended signal from a hardwired
entry/exit source (e.g. push button control or keypad) and the gate returns to a fully open or fully closed
position. 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.
M i g h t y M u l e 3 5 2 5
IMPORTANT SAFETY INSTRUCTIONS
Required Safety Precautions for Gates
Install Warning Signs
Warning signs alert people of automatic gate operation and are required when installing the Mighty Mule®
352 E-Z Gate Opener. Furthermore, a walk-through gate must be installed if pedestrian traffic is expected
near the vehicular gate. We recommend using the GTO Bulldog Pedestrian Gate Lock (Call the GTO
Sales Department) for controlled access.
Bulldog Pedestrian
Gate Lock
(recommended, not included)
Warning Sign
Pedestrian Gate
Contact Sensor
(recommended, not included)
Vehicular Gate
Vehicular Gate
Contact Sensor
Contact Sensor
(recommended, not included)
(recommended, not included)
Warning Sign
Contact Sensor
(recommended, not included)
Entrapment Protection
GTO’s inherent obstruction settings, even when properly adjusted, may not be sensitive enough to
prevent bodily injury in some circumstances. For this reason, safety devices such as safety edge
sensors (or photoelectric sensors), which stop and reverse gate direction upon sensing an obstruction,
are suggested for enhanced protection against entrapment.
Warning Signs
The warning signs (at right) must
be installed on both sides of the
gate (see page 7 for details).
! WARNING
Moving Gate Can Cause
Injury Or Death
1. KEEP CLEAR! Gate may move at any time.
2. Do not allow children to operate gate or
play in gate area.
3. This gate is for vehicles only. Pedestrians
must use a separate entrance.
6
Mighty Mule 352
IMPORTANT SAFETY INSTRUCTIONS
These warning labels should be
found at the locations specified
below. If any of them are
missing, immediately contact
GTO for replacements.
!
Product identification label
GTO DC SWING Series
Conforms to UL325
5th Edition Standards
Serial No.
05/14/08
MM350DUAL-0000000
Gates Thats Open, LLC - Tallahassee, Florida USA
This label is located
under rear mount on the opener.
Warning signs (4 enclosed) to be installed on each side
of the gate (3–5 feet above the bottom of the gate).
®
E-Z GATE OPENER
®
352
UL325 SERIES
1-800-543-GATE (4283) • www.mightymule.com
!
MOVING
GATE!
TO MANUALLY OPEN AND CLOSE THE GATE
1. Turn opener power switch OFF.
2. Disconnect front or rear mount from
mounting bracket.
3. Pull opener away from mounting bracket
and move gate.
Disconnect opener ONLY when the power
switch is OFF and the gate is not moving.
!
Can Cause Injury or Death
1. KEEP CLEAR! Gate may move at any time.
2. Do not allow children to operate gate or play in gate area.
3. This gate is for vehicles only. Pedestrians must use separate entrance.
Maximum Gate: 550 lbs. (249.4 kg); 16 ft. (4.9 m) • Voltage: 12 Vdc; Frequency: 0Hz; Power: 25W • Class I, II, and III Vehicular Swing Gate Operator
Logo and warning labels (2) installed on each side of
opener housing.
M i g h t y M u l e 3 5 2 7
Parts List - Opener and Mounting Hardware
! WARNING
Customer Support Card (1)
Installation Video (1)
32’ Second Opener
Battery Harness (1)
32’ Communication
Cable (1)
Moving Gate Can Cause
Injury Or Death
1.
KEEP CLEAR! Gate may move at any time.
2.
Do not allow children to operate gate or
play in gate area.
3.
This gate is for vehicles only. Pedestrians
must use a separate entrance.
Warning Signs (4)
Receiver (1)
GTO Transmitter (1)
8" Nylon Cable Tie (14)
Closed Position
Stop Plate (1)
Master Opener (1)
Second Opener (1)
Gate Bracket (2)
Post Pivot Bracket (2)
Post Bracket (4)
Transformer (1)
10’ Master
Battery Harness (1)
Hardware Bag Contents
3/8" x 8" Bolt (8)
3/8" Washer (18)
3/8" x 3" Bolt (4)
3/8" Lock Washer (14)
3/8" x 2" Bolt (2)
5/16" Washer (2)
3/8" x 1-1/2" Clevis Pin (4)
Hairpin Clip (4)
8
2" Mounting Screw (5)
5/16" x 1-3/4" Bolt (2)
Mighty Mule 352
3/8" Nut (14)
5/16" Nut (2)
3/8" Bushings (4)
Tools Needed
• Center Punch
• Open End Wrenches — 3/8", 7/16", 1/2", and 9/16"
• Small (Flat Bladed) Screwdriver
• Tape Measure
• Level
• Wire Strippers
• Phillips Screwdriver/ Large
• C-Clamps — small, medium, and large
• Power Drill
• 3/8" Drill Bit
• Hacksaw or Heavy Duty Bolt Cutters
• Extra person will be helpful
YOU MAY ALSO NEED THESE ITEMS BEFORE YOU BEGIN THE INSTALLATION
(Some of these items can be found in the Accessory Catalog page 42):
•
Low voltage wire (RB509) will be needed to run from the transformer to the opener control board;
length depends upon the distance between the transformer power supply and the opener arm. See
Powering Options: Transformer or Solar on page 22, and the Accessory Catalog.
•
If your gate is more than 1000' away from AC power source you will need to use at least one
Mighty Mule® 10 watt Solar Panel (FM123) to charge the 12 Volt automotive or marine type battery
(not included). See the Accessory Catalog.
•
If your fence post is made of wood and is less than 6" in diameter or 6" square, see page 12.
•
Metal plate or washer between nuts and fence posts to prevent pulling bolts out of wood.
•
If your fence post is larger than 6" in diameter you will need threaded rods or carriage bolts longer
than 8". See page 15.
•
•
Low profile ground stop page 17.
•
If you have thin walled tube or panel gates, see Recommended Reinforcement Examples on page 12.
•
Depending on the type of gate, a horizontal cross member or mounting plate may be needed to
mount the front of the opener and gate bracket to the gate. See page 11, step 2; page 15, step 10.
•
Surge protection for transformer.
•
Some types of installations require U-Bolts.
•
PVC conduit.
Spade terminal for transformer page 25, step 4.
M i g h t y M u l e 3 5 2 9
Technical Specifications
MIGHTY MULE® 352 E-Z GATE OPENER
DRIVE
•Low friction screw drive (linear actuator) rated for -5 ºF to +160 ºF (-21 ºC to +71 ºC).
•Powered by a 12 V motor with integral case hardened steel gear reducer. Motor speed reduced to 260 rpm.
Generates 520 inch lb. of torque at 12 V.
•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 a 120 Vac, 18 Vac output transformer [rectified to 14.5 Vdc (40 VA) through
the GTO control board] or by optional GTO Solar Panels [the panel should generate minimum of 10 W at
600 mA]. A diode on the control board prevents battery discharge.
IMPORTANT: Never use both transformer and solar panel - this will damage the battery and control board.
•One (1) blade-style control board 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
• GTO microprocessor-based control board is set for dual leaf, pull-to-open gate installations. DIP switches can
be adjusted to accommodate an optional kit for push-to-open gates (see Accessory Catalog).
•Control board has temperature compensated circuits.
•A circuit on the control board regulates charging. "Sleep draw" is 25 mA; "active draw" is 2 to 5 A.
•Auto-memorization of digital transmitter code.
• GTO remote-mounted RF receiver tuned to 318 MHz.
•Opener length with push-pull tube fully retracted is 371/4", mounting point to mounting point. Max stroke 19".
•Adjustable auto-close timer (OFF to 120 s), and obstruction sensitivity.
•Power terminal bock accommodates a transformer or solar panels.
•DIP switches simplify setup of gate opener.
•Accessory terminal block fully compatible with all Mighty Mule access controls.
•Control board allows connection of safety edge sensors and photoelectric sensors.
•Audio entrapment alarm sounds if unit encounters an obstruction twice while opening or closing.
OPERATIONAL CAPACITY
•The Gate Capacity Chart shows approximate cycles, per day, you can expect from the Mighty Mule 352 Automatic Gate Opener when powered with a transformer. Actual cycles may vary slightly depending upon the
type and condition of gate and installation.
Mighty Mule 352 Gate Capacity /Cycle Chart
Gate Weight
Estimated number of daily cycles, based on use with a transformer and one(1) 12 Volt battery.
550 lbs.
450 lbs.
350 lbs.
250 lbs.
150 lbs.
100 lbs.
50 lbs.
62
67
72
77
82
87
92
5’ - 6’
Number of Cycles Per Day
NR
NR
57
57
NR
62
57
62
67
62
67
72
67
72
77
72
77
82
77
82
87
12’
10’
8’
NR
NR
NR
57
62
67
72
14’
NR
NR
NR
NR
57
62
67
16’
NOTE: "NR" indicates
this size and weight
combination is not
recommended for the
Mighty Mule 352.
* These specifications are subject
to change without notice.
Gate Length
NOTE: BALL BEARING HINGES SHOULD BE USED ON ALL GATES WEIGHING OVER 250 LB.
To determine the number of cycles the gate opener will perform using solar panels, please see the specifications
listed on page 22 or call (800) 543-1236 or (850) 575-4144 for more information.
* An operation cycle is one full opening and closing of the gate.
10
Mighty Mule 352
Installation Overview
Pull-to-Open Gates (Gate Opens into the Property)
The diagram shown below is an example of a pull-to-open installation on a chain link fence and dual
gate. Mounting the openers on masonry columns requires special procedures; see Column Installation
Information on page 42 if you intend to mount the openers on columns. Furthermore, if you have pushto-open gates, you will need to purchase 2 push-to-open brackets (FM148) (see Accessory Catalog) to
properly configure your system. See push-to-open installation on page 36 before proceeding.
Gate Swings Evenly and Freely
Hung Firmly and Plumb
Receiver
120 Volt indoor
Transformer
Master Opener
Second Opener
(surge protector
not supplied)
Gate Bracket
10'
Battery Harness
Closed Position Positive Stop Plates
Fence Post
Set in Concrete
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
You will need to trench across the
driveway in order to lay conduit
for the second battery harness
and communication cable.
32 foot communication cable
allows the MASTER and SECOND
gate openers to operate as an
integrated dual gate system. (run
in PVC conduit)
Run 1000' (max.) of low
voltage wire to battery
from transformer
(wire not included).
32 foot power cable connects
SLAVE to 12 Volt marine or
automotive type battery. (run in
PVC conduit)
Preparation of the Gate
Step 1
The gate must be plumb, level, and swing freely
on its hinges. Wheels must not be attached to
the gate. The gate must move throughout its arc
without binding or dragging on the ground.
Note that gates over 250 lb. should have ball
bearing hinges with grease fittings.
Horizontal Cross Member
Step 2
The fence post must be secured in the ground
with concrete so it will minimize twist or flex
when the opener is activated. We recommend
you position the opener near the centerline
of the gate to keep the gate from twisting and
flexing and to avoid backsplash from rainwater.
The addition of a horizontal or vertical cross
member (if one is not already in place) to provide
a stable area for mounting the gate bracket is
also important.
Vertical Cross Member
M i g h t y M u l e 3 5 2 11
Installation of Mounting Hardware
The position of the post bracket determines the leverage and efficiency of the opener. The post bracket
position also sets the clearance between the opener and gate in the open and closed positions (minimum
2 inches for safety reasons).
The curved design of the post bracket works well for installations on round and square fence posts.
Because the post bracket carries the entire thrust of the active opener, bolts that completely penetrate
the fence post must be used.
On wooden posts, place a metal plate or
washer (not supplied) between the nuts
and the fence post to prevent the thrust
of the opener from pulling the bolts and
washers out of the wood.
Metal Plate
Wooden Post
NOTE: A fence post smaller than 6" in
diameter or 6" square should be made
of metal instead of wood so that it will
remain stable while the opener is moving
the gate.
Wooden Post
Metal Plate
Post
Bracket
Post 
Bracket
Post
Pivot Bracket
Post 
Pivot Bracket
Larger than 6" diameter post
On round posts of 6" diameter or larger, the post pivot
bracket may not be necessary for the installation. In this
instance, the two post brackets are mounted by themselves.
Center of Gate Hinge

Pull-to-Open Installation
IMPORTANT:
We strongly recommend using steel pipe, wood or metal to reinforce thin walled tube gates or wood to
reinforce panel gates as shown. These reinforcement methods will prevent damage to the opener and gate
when the opener is installed.
Recommended Reinforcement Examples
Steel Pipe Cut in Half
(not supplied)
Gate Bracket
Gate Bracket
Panel Gate
Thin Walled Tube Gate
12
Wood or Metal
Reinforcement
(not supplied)
Mighty Mule 352
Gate Bracket
1" x 6" Wood Reinforcement
Determining the Mounting Position
of the Post Bracket Assembly and the Gate Bracket
Post Bracket Assembly
Step 3
Insert the 3/8" x 2" bolt
through the center hole
of the post brackets
and post pivot bracket
as shown. Fasten a
3/8" washer, 3/8" lock
washer and 3/8" nut on
the end of the bolt. DO
NOT overtighten the nut
because the post pivot
bracket will have to be
adjusted later.
NOTE: The following steps are
intended for pull-to-open gate
installations. If you are mounting
your opener on a push-toopen gate (e.g., a gate on a
sloped driveway) you will need
to purchase a Push To Open
bracket (FM148) (see Accessory
catalog). Also, see Push-toOpen Installation beginning on
page 36.
3/8" x 2" Bolt
Post Bracket
Post Pivot Bracket
Post Bracket
3/8" Washer
3/8" Lock Washer
3/8" Nut
Step 4
Attach post bracket assembly and gate bracket to the opener with the clevis pins and bushings. Secure the
clevis pins with hairpin clips.
Clevis Pin
Front Mount
Rear Mount
Clevis Pin
Bushing
Gate Bracket
Opener
Bushing
Hairpin Clip
Post Bracket Assembly
Hairpin Clip
Step 5
With the gate in the open position (up to 110º from its closed position), and the opener fully retracted,
adjust the post bracket assembly and gate bracket until the opener is level. While holding the opener
level, use C-clamps to temporarily keep the post bracket assembly and gate bracket in their respective
positions on the fence post and gate.
Post Bracket Assembly
Level Opener
LEVEL hori
zontal cro
Gate In Open Position
ss membe
r
Gate Bracket
Fence Post
M i g h t y M u l e 3 5 2 13
IMPORTANT: While determining the mounting point for the post pivot bracket assembly, be sure that the
position allows for minimum 2 inches of clearance between the gate and the opener in both the open and
closed positions, as shown in the diagrams below. This clearance will give the opener the most efficient
leverage point for opening and closing the gate and more importantly provides the least possible pinch area.
Step 6
After verifying that you have the best position for the post pivot bracket in the open position, insert the
5/16" x 1-3/4" bolt through the aligned holes of the post bracket and post pivot bracket to hold it in place.
Remove the clevis pin from the front mount and while supporting the gate opener, swing the gate and gate
opener to the closed position. With the gate and gate opener in the closed position check the clearance
and be sure that the gate opener is not binding at the post pivot bracket.
If you don't have 2 inches of clearance or the gate opener is binding on the post pivot bracket, remove the
5/16" x 1-3/4" bolt and readjust the pivot bracket until you can achieve these important clearances.
With the post pivot bracket in the optimum position for clearance and freedom of movement, reattach
the opener to the gate bracket in the open position and recheck the gate opener level and make sure the
brackets are clamped securely.
2" minimum
Pinch Area
Gate in the
CLOSED POSITION
Be sure gate opener
and bracket don't bind.
Pinch Area
Gate in the
OPENED POSITION
2" minimum
TIP: Turning the pivot bracket over
gives more hole alignment options for
the post pivot bracket assembly. You
can also move the entire post pivot
bracket assembly to different positions
on the gate post to help achieve the
proper clearances.
14
Mighty Mule 352
Installing the Post Bracket Assembly and Gate Bracket
Step 7
Mark reference points for bolt holes on the fence
post through middle of bracket slots. Marking
reference points in this manner allows room for
adjustment when mounting the post bracket
assembly and gate bracket. After marking your
reference points, remove the opener and brackets
from the fence and gate.
Mark fence post through 
middle of bracket slots
and drill 3/8" holes
EXAMPLES
TOP VIEW
Step 8
Post Bracket
Assembly
Drill 3/8" holes into fence post as marked.
Round Metal Post
Step 9
Fasten post bracket assembly to the fence post
using (4) 3/8" x 8" bolts, washers, lock washers,
and nuts (provided). Remove excess bolt length
extending beyond the tightened nuts with a hacksaw
or bolt cutters.
Square Metal Post
SIDE VIEW
Square Wood Post
NOTE: In cases where the fence post has a
diameter larger than 6", threaded rods or carriage
bolts longer than 8" (not supplied) must be used.
Step 10
Mark reference points for bolt holes on the gate
cross member through middle of gate bracket slots.
Drill 3/8" holes into the gate
cross member as marked.
Remove excess bolt length 
with hacksaw or bolt cutters
Round Wood Post
Gate In Open Position
Mount gate bracket using (2)
3/8" x 3" bolts, washers, lock
washers, and nuts (provided).
Cut off excess bolt length
extending beyond the
tightened nuts.
LEVEL ho
rizontal c
ross mem
ber
Mark cross member through middle of
gate bracket slots and drill 3/8" holes
Gate Bracket Mounting Examples
FRONT VIEW

SIDE VIEW
Round Tube & Chain Link Gate
Square Tube Gate
FRONT VIEW
SIDE VIEW
Mounting Plate 
Created for 
Decorative Gate
(required but not
supplied)
Remove excess bolt length 
with hacksaw or bolt cutters
M i g h t y M u l e 3 5 2 15
Mounting the Master Opener
Step 11
Attach the opener to the securely bolted post bracket assembly and gate bracket using clevis pins, bushings, and
hairpin clips, or optional Pin Locks (see Accessory Catalog). Verify that the opener is level and adjust the post bracket
assembly if necessary.
Post Bracket Assembly
bolted to fence post
Level Opener
Gate Bracket bolted
to gate cross member
ss member
zontal cro
LEVEL hori
Clevis Pin, Bushing, and Hairpin Clip
Clevis Pin, Bushing, and Hairpin Clip
Gate In Open Position
Fence Post
Mounting the Second Opener
Step 12
Install the second opener on the remaining gate leaf by repeating Step 3 through Step 11, starting on page
13. After you have mounted the second opener, proceed to Installing the Positive Stops.
Installation of the Closed Position Stops
The Mighty Mule® 352 Gate Openers firmly hold the gates in the closed position using
positive stops. The positive stops help stabilize the gate leaves in the closed position.
To further enhance stability and security, we strongly recommended using an optional
Mighty Mule® Automatic Gate Lock (see Accessory Catalog) with your dual gate.
Illustration A
Optional Ground Stop
(beneath gate)
Gate Hinge
SECOND GATE
Gate Hinge
MASTER GATE
Closed Position
Stop Plates
The gate leaf can open
up to 110˚ (max.)
16
BATTERY BOX
The gate leaf can open
up to 110˚ (max.)
Mighty Mule 352
IMPORTANT: You need to
determine which side of the
driveway you will place the battery.
The MASTER gate and gate opener
should be mounted on the same
side as the battery. The gate and
gate opener on the opposite side
of the driveway from the MASTER
and battery will be referred to as the
SECOND gate and gate opener.
Step 1
Closed Position Stop Plate mounted
horizontally on metal post with U-bolts.
Attach the horizontal closed position stop plate
to the MASTER gate leaf.
Detach the gate operators from the gates
and move the gates to their closed position
(Illustration A). Using appropriate hardware
for your type of gate (U-bolts for tube or chain
link; screw or bolts for wood or metal - not
supplied) attach the closed position stop
plate (horizontally) about mid height on
the MASTER gate frame. Do not tighten it
completely at this time. Slide the stop plate
toward the frame of the SECOND gate leaf
until they touch (Illustration B). Once you have
moved the stop plate to the correct position,
tighten its hardware completely.
FRONT VIEW
SECOND Gate Frame
MASTER Gate Frame
Illustration B
TOP VIEW
NOTE: The optional ground stop post is used to provide a secure point for the
SECOND gate to close against. If you will be using the GTO Horizontal Gate Lock
accessory with your gate opener system, the closed position ground stop is REQUIRED,
as shown in Steps 2 and 3.
Closed Position Stop Plate mounted
on the gate leaf that CLOSES FIRST
Install a low profile ground stop (not provided)
beneath the SECOND gate stop plate.
The ground stop needs to be positioned near
the end of the gate as shown in Illustration A and
may be made of metal or concrete and should
be firmly secured in the ground (we recommend
setting it in concrete).
Mount Vertically
Step 2
SIDE VIEW
Closed Position Stop Plate

Low Profile Ground Stop
in Near the Center of Driveway
FRONT VIEW
Illustration C
Step 3
Attach a vertical closed position stop plate to the SECOND gate.
Using appropriate hardware for your type of gate attach the vertical closed position stop plate to the
SECOND gate frame at the point where it will come in contact with the ground stop post. Do not tighten
it completely at this time. You must slide the closed position stop plate toward the ground stop until they
touch (Illustration C). Once you have moved the stop plate to the correct position, tighten its hardware
completely.
NOTE: For a push-to-open installation (gates open out from the property) attach the closed position stop
plate to the outside of the gate.
M i g h t y M u l e 3 5 2 17
At this stage of the installation, the openers should be installed on the
gate leaves and the open and closed position stops should be in place.
Check List
• The gate is plumb, level, and swings smoothly on its hinges.
• A plate or support was added for the gate bracket (if necessary).
• The openers are level and mounted on the centerline of the gate.
SECOND Gate Opener
Post Bracket Assembly
MASTER Gate Opener
Gate Bracket
OPTIONAL Closed Position
Ground Stop Post
18
Closed Position
Positive Stop Plates
Mighty Mule 352
Trench and Lay Conduit for Wiring
Step 1
Trench and place 3/4 inch or larger PVC conduit from Master Opener Arm to Second Opener Arm.
At this time you may also choose to trench and lay conduit from an AC power source to the gate for
connecting the 18V transformer.
NOTE: If using solar power, trenching for the transformer is not necessary
Step 2
Route the 32 foot second battery harness cable and 32 foot Communication Cable through the PVC conduit
running from the Second Opener Arm to the Master Opener Arm.
Second Opener
3/4 inch or larger
PVC Conduit
Master Opener
Trench cut across driveway for
routing of the Communication Cable
and Second Battery Harness Cable.
32 foot Second Battery Harness Cable
and 32 foot Communication Cable
routed through the PVC conduit.
IMPORTANT: After trenching driveway follow these guidelines for PVC installation and running wire.
• DON'T use too many curves in PVC. Use sweeping 90° angles. Wire should be easily removeable if needed.
• DON'T splice wire. This can cause a voltage drop and can interfere with sequencing and the rev counter.
• DON'T run wire in same conduit as AC wiring. This causes communication interference and electrical noise.
• DO use minimum of 3/4" ID (interior diameter) PVC conduit available at your local home improvement store.
Preparing to Connect the Wires
In order to have easy access to the control boards during the rest of the installation,
remove the master and second openers and remount them upside down.
ON/OFF
Switch
Bottom
Access Panel
IMPORTANT:
Return opener arms to the
upright position when installation
is complete to prevent water
damage to the control board.
O
F
F
O
N
M i g h t y M u l e 3 5 2 19
Attaching Master Opener Battery and Communication Cables
NOTE: At this point your 32 foot Power Cable and 32 foot Communication Cable should be run
through conduit to connect your master and second.
Control Board Access Cover
Step 1
With the MASTER opener mounted in the
upside down position remove the Control
Board Access Panel on the bottom of the
opener arm.
ON/OFF
Communication
Cable (LINK)
Master Battery
Harness
Connector
Control Board
Step 2
FF
ON/O
Place the 12 Volt automotive or marine type
battery and its weatherproof case within 6 feet
of the fence post where the master opener arm
is mounted.
ON/OFF Switch
Receiver Wires
FF
Connect the Communication Cable coming out
of the conduit from the Second Opener to the
LINK terminal on the master opener arm control
board. Be sure to leave enough slack in the
cable to accomodate routing of cable through
access panel.
10 Foot
Battery Harness Cable
Master
Battery Harness Connector
Step 4
Run the end of the10 foot Master Battery
Harness cable up to the Master Opener and
plug it into the Battery Harness Connector
located in the opener access panel. DO NOT
connect the other end of the Battery Harness
cable at this point.
ON/O
Step 3
FF
ON/O
Step 5
IMPORTANT: Make sure the power switch on
the opener arm is in the OFF position.
Master Opener in
Upside Down Position
Conduit
20
Communication
Cable
Mighty Mule 352
Second
Battery Harness
Cable
Attaching Second Opener Battery and Communication Cables
Step 1
With the SECOND opener mounted in the
upside down position remove the Control
Board Access Panel on the bottom of the
opener arm.
Control Board Access Cover
Step 2
ON/OFF
Connect the Communication Cable coming
out of the conduit from the Master Opener to
the LINK terminal on the second opener arm
control board. Be sure to leave enough slack
in the cable to accomodate routing of cable
through access panel.
Second Battery Harness
Connector (32’)
FF
ON/O
Control Board
Step 3
Run the end of the Second Battery Harness
Cable up to the Second Opener and plug it
into the battery harness terminal on the control
board. DO NOT connect the other end of the
Battery Harness cable at this point.
ON/OFF Switch
Communication
Cable (LINK)
Step 4
FF
ON/O
IMPORTANT: Make sure the power switch on
the opener arm is in the OFF position.
At this point your gate openers should be connected like the picture below.
Second Opener
Master Opener
M i g h t y M u l e 3 5 2 21
Powering Options: Transformer or Solar
IMPORTANT:
• The Mighty Mule 352 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 of the
opener arm. The 10 foot harness supplied connects the battery to the master arm.
• The battery charge is maintained by the 18 Volt transformer included or by using optional solar
panel(s). The transformer or solar panel is connected to the opener arm control board using
low voltage, 16 gauge, dual conductor, multi-stranded, direct burial wire (RB509) (see page 24
and the Accessory Catalog).
• All low voltage wire used with the Mighty Mule® 352 Gate Opener must be 16 gauge dual
conductor, multi-stranded, direct burial wire (see page 24 and the Accessory Catalog). Do not
run more than 1000 feet of wire.
• The transformer is designed and intended for indoor use. If the transformer can be plugged
only into an outside electrical outlet, a weatherproof cover or 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 one
10 watt Solar Panel to charge the battery (see Accessory Catalog). Refer to the Solar Panels
and Gate Activity chart below.
NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT THE SAME TIME
– it will damage the control board –
Solar Panel and Gate Activity Chart
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. (see Accessory
Catalog). The figures shown are
for winter (minimum sunlight) and
do not account for the use of any
accessory items.
Winter Ratings
12 v dual gate (10 watts) solar charger 12 v dual gate (15 watts) solar charger 12 v dual gate (20 watts) solar charger 12 v dual gate (25 watts) solar charger 12 v dual gate (30 watts) solar charger Accessories connected to your
system will draw additional
power from the battery and will
require additional solar panels.
* Use up to 250 feet of 16 AWG
wire to place solar panel in a
good location.
22
Mighty Mule 352
Zone 1
4
7
10
13
16
Zone 2
Zone 3
8
13
18
23
28
13
20
27
34
41
Connecting The Battery
Attach the 10 foot battery harness wires provided, to the terminals of the battery. Take care to attach the
BLACK wire to the NEGATIVE terminal and the RED wire to the POSITIVE terminal. Reverse connection will
cause damage to the control board.
IMPORTANT: Make sure the power switch on the both opener arms is in the OFF position
Master Opener
10 ft Master Opener
Battery Harness Cable
BLACK to NEGATIVE
RED to POSITIVE
32 ft Communication Cable
PVC Conduit
32 ft Second Opener
Battery Harness Cable
run through PVC
M i g h t y M u l e 3 5 2 23
Connecting the Transformer
IMPORTANT: Never connect the transformer and a solar panel to the opener control board at the same
time. It will damage the control board.
If you are using SOLAR PANEL(S) to charge the opener battery, skip this section and go to "Connecting
Solar Panel(s)" section on page 26.
IMPORTANT INFORMATION ABOUT LOW VOLTAGE WIRE
The only wire acceptable for use with GTO products is 16 gauge multi-stranded, low voltage,
PVC sheathed wire. This particular gauge enables the transformer to provide an adequate
charge through the control board to the battery at distances up to 1000 ft.
DO NOT use telephone wire or solid core wire. Unlike multi-stranded wire, these types of wire
are inadequate for use with your gate opener system. Telephone wire and solid core wire do
not deliver enough voltage for your gate opener to function and will cause the system to go
into a condition known as "low voltage lockout."
NEVER splice wires together. Splicing permits corrosion and seriously degrades the wire's
ability to carry an adequate current.
Step 1
Select the 120 Volt electrical outlet into which you will plug the transformer. Lay the low voltage wire in a
trench following a path from the selected electrical outlet to the control box. Wires coming up from the
ground should be run through PVC conduit to protect them from lawn mowers, weed eaters, and grazing
animals. Be sure to bury the wire laid in the trench.
Step 2
Bring enough wire up through the PVC
conduit to allow for gate movement
from open to closed position. See
example right.
Master Opener
GTO indoor
Transformer
(surge protector
not supplied)
PVC conduit (not included) to protect
wire from lawn mowers and weed eaters.
Run 1000' (max.) of low
voltage wire to control
board from transformer
(wire not included).
24
Mighty Mule 352
15
2
3
4
Strip 3/16" off the ends of the low
voltage wire and twist tightly.
Insert these ends to the 18 VAC
terminal block located on the
control board (see illustration at
right). The wires can be inserted
into either terminal regardless of
color. Be certain not to let the
exposed wires touch each other!
ON
1
Step 3
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
RF
CHARGING
POWER
RED
BLK
GRN
COMMON
CYCLE
EDGE
18VAC
SOLAR
PANEL
SAFETY
AUX
OUT
EXIT
LINK
RCVR
Master Arm
Control Board
Tighten set screws against
exposed end of wires. A dab of
household petroleum jelly on
each terminal will help prevent
corrosion.
Low Voltage Wire
from Transformer
Step 4
At the AC outlet strip 1/2" of insulation from
the ends of the low voltage wire. Attach these
stripped ends to the transformer terminals.
A dab of household petroleum jelly on each
terminal will help prevent corrosion.
We suggest crimping a spade tongue terminal
(not provided) to the end of each wire before
attaching it to the transformer.
Spade Tongue Terminal
(not provided)
Make sure the exposed wires do not touch
each other!
Plug the transformer into the electrical outlet.
(Use of a surge protector with the transformer is
strongly recommended - not included) If electrical
outlet is located outdoors, outlet and transformer
should be protected by a weatherproof cover.
Transformer
SURGE PROTECTOR
Step 5
M i g h t y M u l e 3 5 2 25
15
ON
1
2
3
4
Connecting Solar Panel(s)
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
RF
CHARGING
POWER
IMPORTANT: Never connect the transformer and a solar panel
to the opener control board at the same time. It will damage the
control board.
Strip 3/16" off the ends of the low voltage wire from
the solar panel and twist tightly. Attach the RED solar
panel wire to the SOLAR terminal marked (+) and the
BLACK solar panel wire to the SOLAR terminal marked
(–) on the MASTER control board.
BLK
RCVR
If you are using the transformer included with the Mighty Mule
352 to charge the opener battery, skip this section and go to
"MASTER CONTROL BOARD SETTINGS" below.
BLK
RED
GRN
COMMON
EDGE
SOLAR
PANEL
CYCLE
EXIT
AUX
OUT
SAFETY
LINK
18VAC
RED
Low Voltage Wire
from Solar Panel(s)
Solar Panels connect in PARALLEL
Tighten set screws against exposed end of wires. A dab
of household petroleum jelly on each terminal will help
prevent corrosion.
STATUS
NOTE: For multiple panels wire the panels in parallel as
shown in this diagram.
RED
RED
BLACK
BLACK
attach BLACK to negative (–) solar terminal on control board
attach RED to positive (+) solar terminal on control
board
MIN
MAX
Master Control Board Settings
DIP Switches
STALL FORCE
OFF
Main DIP Switch Settings (MODES)
15
ON
1
2
3
4
4
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
ON
3
LEARN
REMOTE
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
RF
CHARGING
POWER
OFF
MASTER opens 1st, SECOND opens 2 seconds later.
SECOND closes 1st, MASTER closes 4 seconds later. (factory)
OFF
ON
MASTER opens 1st, SECOND opens 2 seconds later.
SECOND closes 1st, MASTER closes 8 seconds later.
ON
ON
MASTER and SECOND simultaneously open and close.
RED
ON
BLK
Single Gate Mode
GRN
OFF
SOLAR
PANEL
COMMON
OFF
AUX OUT
EDGE
Dual Mode Sequence
CYCLE
18VAC
DIP #2 DIP #3
EXIT
* MODE1 or MODE 2 must be in the ON position to operate in DUAL mode.LINK
SAFETY
MODE 2
2
MODE 1
1
DIP Switch #1 - Push/Pull-to-Open
If your gates open into the property the DIP Switch
is set to OFF (factory default). If your gates open out
from the property the DIP Switch must be set to the
ON position. NOTE: if you have a Push-to-Open gate
application you will need Push-to-Open brackets
(see Push-to-Open Instructions on page 36).
120
CLOSE TIME
SET
LIMIT
RCVR
DIP Switch #4 - Lock/Beacon
This DIP selects the mode of operation of the "AUX OUT" terminal. The OFF (factory) setting is selected
when the Mighty Mule Automatic Gate Lock is used with the Mighty Mule 352. The RED wire from the
lock is connected to the "AUX OUT +" terminal and the BLACK wire from the lock is connected to the
"AUX OUT –" terminal. Factory default-(OFF position provides a timed pulse of voltage to the accessory
while the gate opener is activated). Lock and circuit board will be damaged if #4 is on.
The ON setting is selected when a beacon or light is used with the Mighty Mule 352. One wire from the
low voltage beacon or light is connected to the "AUX OUT +" terminal and the other to the "AUX OUT –"
terminal. (ON position provides a continuous voltage to the accessory while the gate opener is activated).
Important: Make sure your light or beacon is a 12Vdc system that draws less than 2 amps or less than 25 watts.
26
Mighty Mule 352
Stall Force Potentiometer Setting
IMPORTANT: For safety reasons the obstruction setting or Stall Force on the Mighty Mule®
352 control board comes from the factory set at
MIN (minimum). In many gate installations this
setting will need to be adjusted to overcome the
weight and size of the gates.
STAT
MIN
MAX
STALL FORCE
OFF
The Stall Force potentiometer on the control board operates like a volume control on a
radio. It controls the obstruction sensitivity (or
the amount of force the opener will apply to an
obstruction) before it automatically stops and
reverses direction for approximately two (2)
seconds.
LEARN
REMOTE
MIN
1
2
3
4
SET
LIMI
MAX
STALL FORCE
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
MIN
MAX
STALL FORCE
RF
RED
BLK
GRN
COMMON
EDGE
CYCLE
SAFETY
15
NOTE: You may need to increase the
stall force in cold weather due to increased
resistance from gate hinges.
SET
LIMIT
ON
Use a small slotted screwdriver to turn the arrow
in the center of the potentiometer. Adjust the
sensitivity from the MINIMUM position where the
gate operates without obstructing from its own
weight or the wind conditions in your area.
120
CLOSE TIME
RECR
MASTER
SECOND
Control Board
Control Board
ALWAYS KEEP SAFETY AT THE TOP OF YOUR LIST WHEN ADJUSTING OR
SERVICING YOUR AUTOMATIC GATE OPENER!
STATUS
Setting Auto-Close Time
MASTER ARM CONTROL BOARD ONLY
MIN
MAX
STALL FORCE
15
CLOSE TIME (auto close timer): Determines how long
the gate will remain open before it automatically closes.
The limits are OFF to 120 seconds. The factory setting
is the OFF position.
120
CLOSE TIME
SET
LIMIT
OFF
LEARN
REMOTE
120
1
CLOSE TIME
ON
2
3
4
Note: Gate will NOT automatically close unless both
gates are at the fully open position regardless of the
auto-close timer setting.
OFF
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
RF
CHARGING
POWER
BLK
RED
GRN
COMMON
EDGE
M i g h t y M u l e 3 5 2 CYCLE
SOLAR
PANEL
EXIT
AUX OUT
SAFETY
LINK
18VAC
RECR
27
Installing the Receiver
Use the transmitter to check the range of the receiver before permanently mounting it.
Consider the following when mounting the receiver:
• Standard receiver cable length is 10 feet (receivers with a longer cable are
available as special order items; call the GTO Sales Department). NEVER splice
receiver cable!
• Run the cable through PVC conduit to protect it from damage.
• DO NOT run cable through metal conduit because the receiver signal range will
be decreased.
• DO NOT coil excess cable or store it in the control box.
• DO NOT run cable in conduit containing ac wiring.
• The receiver range can vary from 50 to 100 feet depending upon weather,
topography, and external interference.
NOTE: Do not mount upside down.
FCC Regulation
This device complies with FCC rules Part 15. Operation is subject to the
following conditions:
1. This device may not cause harmful interference.
2. This device must accept an interference that may cause undesired
operation.
Transmitter distance may vary due to circumstances beyond our control.
NOTE: The manufacturer is not responsible for any radio or TV
interference caused by unauthorized modifications to this equipment.
Such modifications could void the user’s authority to operate the
equipment.
28
Mighty Mule 352
Setting the Closed Position Limit
* NOTE: You may need to set the stall force slightly off of minimum
depending on the size and weight of the gate.
For PULL-TO-OPEN Installation
Turn the power switches on the
opener arms to the ON position
FF
ON/O
Fully Open Position
Your Mighty Mule 352 has two Limit Settings
1) OPEN Limit setting: (gates in the OPEN POSITION /
FACTORY SET & NOT ADJUSTABLE) The open limit setting
is the fully open position. At this point the arms are
fully retracted.
Fully Closed Position
2) CLOSED Limit setting:
The CLOSED Limit setting (gates in the CLOSED POSITION)
To achieve optimum closed position, you are required to complete
the following FOUR STEPS:
STATUS
Step 1
While programming, be sure the gate is in the OPEN POSITION and
the operator is mounted upside-down with “SET LIMIT" PROGRAM
BUTTON visible on the control board.
MIN
MAX
STALL FORCE
MASTER CONTROL BOARD
SET LIMIT Button
OFF
Step 2
120
CLOSE TIME
SET
LIMIT
LEARN
REMOTE
15
Activate your opener by pressing the entry transmitter. Your gates
should now be moving from the fully open position toward the
closing position. Press the transmitter again to stop the gate at the
desired closed position. Note: whichever gate reached its desired
closed position first that will be the first one to be programmed.
1
ON
2
3
4
RF
CHARGING
POWER
Save the setting by pressing the transmitter and allowing the gate to
return to the fully open position. YOUR CLOSED POSITION LIMIT IS
NOW PROGRAMMED.
BLK
RED
GRN
EDGE
COMMON
Step 3
SOLAR
PANEL
CYCLE
AUX OUT
EXIT
LINK
18VAC
SAFETY
• If the second arm is stopped at the desired closed position,
press the 'SET LIMIT' on the SECOND ARM for 5 seconds.
• If the master arm is stopped at the desired closed postion,
press the 'SET LIMIT' on the MASTER ARM for 5 seconds.
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
RECR
STATUS
Step 4
SECOND CONTROL BOARD
SET LIMIT Button
TESTING YOUR CLOSED LIMIT SETTING:
Press your entry transmitter and allow your gate to close. If CLOSED
position is not correct or needs to be changed you will need to CLEAR
your CLOSED LIMIT (see below) setting and follow steps 1 through 3
again.
M i g h t y M u l e 3 5 2 MIN
MAX
STALL FORCE
15
CLEARING PROGRAMMED CLOSED LIMIT SETTING:
If you make a mistake and set the limit at the wrong position – press your
transmitter to return the gate to its fully opened position, then press and
hold the "SET LIMIT" button on the corresponding arm for 5 seconds. This
will clear the memory for the closed limit position. Follow Steps 1-3 again.
SET
LIMIT
LINK
Repeat step 2-3 for the other arm that has not been programmed in
step 2.
29
Setting Your Personal Transmitter Code
All GTO transmitters are set to a standard code at the factory and are ready to operate your Mighty Mule®
352 Gate Opener®. For your safety and security, however, we strongly recommend that you replace the
factory setting with your own personal code. Follow the directions below:
1. Remove the Transmitter Cover
On the back of the transmitter use a small phillips head screw driver
to remove the two screws on the sides of the visor clip and separate
the front cover from the transmitter. With the front cover removed,
the battery and the DIP switches will be exposed. To set a new code,
use a small screwdriver to move the switches.
LE
D
–
0
+
1
2
3
4
5
A2
A
LK
AL
6
3S
IN
E
7
8
9
12
BA
TT
ER
EC
E
V
Y
2. Set the transmitter DIP Switches
There are nine (9) transmitter DIP switches; each can be placed in three
different positions (+, 0, –). DO NOT set all the switches in the same
position, such as all +, all 0, or all –. Once the DIP switches have been set to
a personal code, replace and close the access cover.
1 2 3 4 5 6 7 8 9
+
0
ECE
WARNING: No other adjustments should be made inside the transmitter.
3. “Teach” the New Code to Control Board Memory
STATUS
A. Press and hold transmitter button.
B. Press and hold the LEARN REMOTE button on
the control board until it beeps.
C. Release transmitter button.
D. Release LEARN REMOTE button. The new code
is stored in control board memory.
MIN
MAX
STALL FORCE
OFF
120
CLOSE TIME
Master Arm
Control Board
LEARN
REMOTE
15
SET
LIMIT
1
ON
2
3
4
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
RF
CHARGING
POWER
30
Mighty Mule 352
BLK
RECR
RED
GRN
COMMON
EDGE
CYCLE
SOLAR
PANEL
EXIT
AUX OUT
SAFETY
LINK
18VAC
LEARN REMOTE
Button
Connecting Additional Safety Devices
Although GTO strongly recommends the use of additional safety devices, we do not endorse any
specific brand names. Only use products that are certified and listed to be in compliance with any
applicable UL standards (Underwriters Laboratories) and national and regional safety codes.
Call GTO Sales at 1-800-543-4283 for information on compatible
products for your specific application.
M i g h t y M u l e 3 5 2 31
LOCK OUTPUTS
Control Board Connections
1 AUX OUT (+): (Typically for use with automatic gate lock or light)
• Provides 12Vdc power @ a maximum of 2 Amps or less than 25 watts when the gate is in motion.
2 AUX OUT (-): (Typically for use with automatic gate lock or light)
• Provides 12Vdc power @ a maximum of 2 Amps or less than 25 watts when the gate is in motion.
NOTE:
• All control inputs are dry-contact, normally open, inputs. DO NOT apply external voltage sources to these inputs.
• All inputs are connected with respect to COMMON terminal.
• The status light will blink once when its corresponding input is activated.
3 SOLAR PANEL (-)
• Input for 18-22Vdc charge power from solar panel
4 18 VAC
• Input for 18-22Vac charge power from transformer
2
5 SOLAR PANEL (+):
• Input for 18-22Vdc charge power from solar panel
• Input for 18-22Vac charge power from transformer.
4
EXIT
7
SAFETY
8
EDGE
9
CYCLE
10
10 COM: Circuit common (reference for all logic input)
• Two (2) terminals to provide extra common connection point.
32
Mighty Mule 352
BLK
RED
LOCK/BEACON
9 CYCLE: (Typically for use with doorbell button or hardwired keypad)
• Each activation at this input will cycle the operation as follows:
….→ OPEN → STOP → CLOSE → STOP → OPEN → …
GRN
RF
8 EDGE: (Typically for use with safety edge device or other
contact sensor)
• Activation of this input while the gate is operating will cause the
gate to stop and reverse direction for approximately 2 seconds.
• Activation of this input while gate is idle will prevent gate
from opening or closing.
COMMON
RCVR
ACCESSORY INPUTS
6
CHARGING
POWER
7 SAFETY: (Typically for use with photo beam device, loop
detector or other non-contact sensors)
• Activation of this input while the gate is closing 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 gate is idle will prevent gate from
closing.
5
LINK
6 EXIT: (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).
3
18VAC
1
SOLAR
PANEL
AUX
OUT
CHARGE POWER INPUTS
Connecting Accessories
RF
GTO
Automatic Lock
6
7
1
10
6
7
8
9
10
COMMON
5
CYCLE
4
RED
BLK
SOLAR
PANEL
GRN
18VAC
AUX
OUT
2
IC
TRON
3
LINK
1
ELEC
2
EDGE
ATIC
OM CK ®
AUTE LOLOCK
GASETCURITY
1
SAFETY
NOTE: When
connecting Automatic
Lock make sure
DIP #4 is set to off.
EXIT
CHARGING
POWER
RCVR
1
According to
Application
8
10
10
ON
DIP
1 2 3 4 5 6 7 8 9 10
NO
COM
NC
V+
V–
LOOP
LOOP
Edge Sensor
GTO Loop Detector
7
10
LOOP
10
8
GTO Photo Beams
Mighty Mule
Push Button Control
1
4
GHI
7
PRS
2
ABC
5
JKL
8
TUV
Red
1
Blue
6
Black
10
Shield
10
Yellow
3
DEF
6
MNO
9
WXY
0
9
10
Mighty Mule
Vehicle Sensor
10
Mighty Mule
Keypad
Refer to Vehicle Sensor
manual for additional
connections.
Black - Power
Red + Power
10
1
GTO Universal Receiver
Ch 1 Remotes
9
10
10
6
Ch 2 Wireless Wand
NOTE: Connections are
for typical applications.
There may be additional
connection options for
applications that are not
illustrated here.
M i g h t y M u l e 3 5 2 33
Routing Wires Through The Access Panel
Master Opener
Routing Pin
Neatly arrange all
wires to lay flat as
they come out of
the opener.
Second Opener
The battery harness and
communication cable must be
routed down the sides of the opener
and flatly out of the slot in the back
of the opener.
Battery Harness Wires
Transformer or Solar Wires
Receiver Wires
Communication Cable (LINK)
Accessory Wires
It is IMPORTANT that the wires lay
flat and run inside the routing pins
at the back of the opener and out
the slot without being pinched when
the control board access cover is
replaced. See the illustrations to the
right and below.
–o
ON/OFF
Mighty Mule 352
Second Opener
Wire Routing
–o
20 amp fuse
20
It is IMPORTANT that the wires lay flat and run inside the
routing pins at the back of the opener and out the slot
without being pinched when the control board access
cover is replaced. See the illustrations to the right and
below.
Mighty Mule 352
Master Opener
Wire Routing
ON/OFF
The master opener's battery harness wire has an in-line 20 Amp fuse
that must be placed inside the opener prior to closing the access
panel. The illustration to the right shows the best placement for the battery harness wire, connector and in-line
fuse, communication cable, receiver wire, transformer
or solar panel and any accessories that have been
installed. All wires must be routed down the sides of the
opener and flatly out the slot in the back of the opener.
To avoid stripping screw
holes - tightening screws
by hand with a hand held
screwdriver is recommended.
Wire Slot
Routing Pin
Neatly arrange
both wires to lay
flat as they come
out of the opener.
Battery Harness Wires
If you have any questions please
call GTO Technical Service at
1-800-543-1236.
Communication Cable
34
Mighty Mule 352
Final Step
When everything has been connected to the opener...
Replace the control board access
cover. If you were working with the
opener with the control board access
facing up, remove the opener arm
from both mounts and remount
it in the upright position (control
board cover facing down). Failure
to remount opener in the up right
position will allow water to enter the
opener and cause damage to the
opener control board.
M i g h t y M u l e 3 5 2 35
Push to Open Installation
Determining The Mounting Position
of The Post Bracket Assembly
"Push-to-Open" gates open out from the property.
Push-to-Open Brackets are required for this type of
installation (see Accessory Catalog). If you have pull-to-open
gates (gate opens into the property), return to page 13; step 3.
In a PUSH-TO-OPEN installation the opener is installed while
the gate is in the closed position.
Step 1
With the gate in the closed position (up to 110º from its
open position), and the opener fully retracted, adjust
the post bracket assembly and gate bracket until
the opener is level. While holding the opener level,
use C-clamps to temporarily keep the post bracket
assembly and gate bracket in their respective positions
on the fence post and gate.
Post Bracket Assembly
Swinging gates shall not open into public access areas!
3/8" x 2" Bolt
Post Bracket
Push-To-Open Bracket
(optional accessory)
Post Bracket
3/8" Washer
3/8" Lock Washer
3/8" Nut
IMPORTANT: While determining the mounting point for the
post pivot bracket assembly, be sure that the position allows for
minimum 2 inches of clearance between the gate and the opener
in both the open and closed positions, as shown in the diagrams
below. This clearance will give the opener the most efficient
leverage point for opening and closing the gate and more
importantly provides the least possible pinch area.
Step 2
Gate in the Open Position
Pinch Area (gray)
After verifying that you have the best
position for the post pivot bracket, insert the
5/16" x 1 3/4" bolt through the aligned holes
of the post bracket and post pivot bracket
and fasten it with the 5/16" washer and nut.
IMPORTANT: If you loosened the clamp on
the post bracket to achieve the optimum
position, tighten it in its new position and
recheck the gate bracket with the gate in
the open position (move the gate bracket
and re-clamp it if necessary).
2" minimum
Gate in the Closed Position
Pinch Area (gray)
2" minimum
36
Mighty Mule 352
Step 3
With the gate in the fully closed position and the opener retracted, swing the opener to the gate. Mark
reference points for bolt holes on gate cross member through middle of gate bracket slots. The opener
must be level. (Some vertical adjustment is possible by sliding the post bracket assembly up and down.)
Drill 3/8" holes into the gate cross member as marked. Fasten gate bracket to cross member using (2)
3/8" x 3" bolts, washers, lock washers, and nuts. Attach the opener to the post bracket assembly and gate
bracket using clevis pins, bushings, and hairpins clips.
Fence Post
LEVEL
Gate Post and Gate Cross Member
(In Closed Position)
Operato
r
LEVEL
STATUS
POST PIVOT BRACKET level with the
horizontal surface of the GATE BRACKET
LEVE
L
MIN
MAX
STALL FORCE
OFF
120
CLOSE TIME
SET
LIMIT
1
ON
15
2
2
3
3
4
4
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
RF
CHARGING
POWER
BLK
RED
GRN
COMMON
EDGE
SOLAR
PANEL
CYCLE
AUX OUT
EXIT
LINK
18VAC
SAFETY
Make sure the control box power switch is OFF. Use a small
screwdriver to move the Number 1 DIP switch from the factory
setting (OFF / Pull-To-Open) to ON for Push-To-Open. Turn
power switch ON. The control board is now configured to
push the gate open.
ON
1
Step 4
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
LEARN
REMOTE
RCVR
Setting the Open Position Limit
Step 1
Confirm that the power switch is in the ON position, and the gate is in the CLOSED POSITION.
Step 2
Activate your opener by pressing the entry transmitter. Your gates should now be moving from the fully
CLOSED POSITION toward the opening position. Press the transmitter again to stop the gate at the desired
OPEN position. Note: whichever gate reached its desired open position first that will be the first one to be
programmed.
• If the second arm is stopped at the desired open position,
press the 'SET LIMIT' on the SECOND ARM FOR 5 SECONDS.
• If the master arm is stopped at the desired open postion,
press the 'SET LIMIT' on the MASTER ARM FOR 5 SECONDS.
M i g h t y M u l e 3 5 2 37
STATUS
Step 3
Save the setting by pressing the transmitter and allowing the gates
to return to the fully closed position. YOUR OPEN POSITION LIMIT
IS NOW PROGRAMMED.
MIN
SET LIMIT Button
Step 4
Repeat step 2-3 for the other arm that has not been programmed
in step 2.
120
CLOSE TIME
SET
LIMIT
1
2
3
4
LEARN
REMOTE
PULL-PUSH
MODE1
MODE2
LOCK/BEACON
RF
CHARGING
POWER
BLK
RED
GRN
COMMON
EDGE
CYCLE
SOLAR
PANEL
EXIT
LINK
18VAC
SAFETY
CLEARING PROGRAMMED OPEN LIMIT SETTING:
If you make a mistake and set the limit at the wrong position – press
your transmitter to return the gate to its fully closed position, then AUX OUT
press and hold the "SET LIMIT" button for the corresponding arm for
5 seconds. This will clear the memory for the open limit position.
Follow Steps 1-3 again.
ON
TESTING YOUR OPEN LIMIT SETTING:
Press your entry transmitter and allow your gate to open. If OPEN
position is not correct or needs to be changed you will need to
CLEAR your OPEN LIMIT (see below) setting and follow steps 1
through 3 again.
OFF
15
MAX
STALL FORCE
MASTER CONTROL BOARD
RECR
STATUS
SECOND CONTROL BOARD
SET LIMIT Button
SET
LIMIT
MIN
MAX
STALL FORCE
LINK
15
38
Mighty Mule 352
Visual and Audible Diagnostic Indicators
If your gate opener does not function properly after it is installed, use this guide or use the online
troubleshooter at http://support.gtoinc.com/support/troubleshooter.aspx before calling the
GTO Service Department.
• 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 in a coastal area.
• Clean the push-pull tube with a soft, dry cloth and apply silicone spray to it at least once a month.
• While oxidation is a normal part of weathering of equipment that is exposed to the elements, we recommend you apply silicone spray the front and rear mounts to minimize this effect.
Audible/Buzzer/Alarm Feedback:
1. 1 beep with 2 seconds off:
Limit switch error: Limit switch’s normally open and normally close inputs both open or both shorted.
Circuit board is indicating faulty limit switch inside the operator. The alarm will automatically shut off in
4 seconds after the problem is corrected. Call Tech Support.
2. 5 beeps with 2 seconds off:
Low battery condition detected:
- Check battery voltage to ensure you have 12.5 to 13.5 Vdc
- Check transformer output to ensure you have 18-22 Vac
- Check charging circuit with transformer or solar panel connected to ensure battery is being charged to
13.8 to 14.8 vDC. Battery may be charged with a trickle charger at 12Vdc 2 amps for 3 to 4 hours but
be sure to disconnect it from the system.
3. 1 beep when attempt to run the unit:
- Blown fuse
- Dead cell or extremely low battery condition.
- Bad connection from battery to circuit board.
4. Alarm continuously beeps (remote does not operate unit AND not at either limits):
- Two consecutive obstructions have been detected without reaching the limit. Alarm
will automatically shut off after 5 minutes. ‘Power-cycle’ the unit will also shut off the alarm.
- The battery may be extremely low.
5. Learn Remote: (MASTER ARM ONLY)
When a new code is learned from the remote the alarm will sound. Release the ‘LEARN REMOTE’ button
will turn the alarm off. See "Setting Your Personal Transmitter Code" section on page 30.
6. Power-Cycle:
The alarm will beep for 1 second upon power up to indicate the opener is ready to operate.
Visual/LEDs Feedback:
1. RF LED (LED2): (MASTER ARM ONLY)
Blinking when there is 318 MHz signal is received. This LED is typically off when the receiver is connected
and no 318 MHz signal is presented.
If no light:
a. Check receiver connection on the control board
b. Replace the battery in the remote.
c. Relocate antenna
d. Re-learn the remote
M i g h t y M u l e 3 5 2 39
2. STATUS LED (LED1):
While the unit is IDLE:
1 blink with 2 seconds off:
Free Exit terminal is shorted to common. Check exit wand or loop detector.
2 blink with 2 seconds off:
Safety terminal is shorted to common. Check photo beams or loop detector.
3 blink with 2 seconds off:
Edge terminal is shorted to common. Check edge sensor.
4 blink with 2 seconds off:
Cycle terminal is shorted to common. Check push button, wired keypad or wired intercom.
LEARN LIMIT Mode:
This LED will turn on when the ‘SET-LIMIT’ button is pressed. It will turn off after 3 seconds
indicating that it has entered the learn limit mode (if not at the retracted limit) or cleared the
previous learned limit (if at retracted limit). See "Setting Closed Position" section on page 27.
Whenever there is a change in state at any of the inputs this LED will blink once.
3. POWER LED (Green): (MASTER ARM ONLY)
ON: AC power or solar power is present.
OFF: NO AC power or solar power is present.
4. CHARGING LED (Red): (MASTER ARM ONLY)
Continuously ON: Fast charging mode. (~1.5 Amps charging current). 14.8 Vdc Blinking (two blinks per
second): Soak charge. Enter this mode after fast charging. The battery is almost at full charge in this
mode. 14.2 Vdc Slow blinking (one blink per second): Float charge. In this mode when the battery is
fully charged. 13.8 Vdc
The Gate CLOSES Then Opens Again on its Own:
1. Check the position of the pivot and post brackets and readjust if necessary.
2. Check the gate for binding or hinge damage.
3. Reset closed position limit.
4. Adjust stall force.
The Gate OPENS Then Closes Again on its Own:
1. Check the position of the gate brackets and readjust if necessary. Take opener off gate. Retract tube
with remote. Re-attach arm to see if hole in front mount aligns with hole in gate bracket.
2. Check the gate for binding or hinge damage.
3. Adjust stall force.
VOLTAGE RATINGS
18 Vac Transformer__________________________18.0 to 22.0 Vac
10 W Solar panel (single)_____________________18.0 to 22.0 Vdc 600 mA
measure voltage at panel and control box.
12 V Battery_________________________________12.5 to 13.5 Vdc
Charging circuit _____________________________13.8 to 14.8 Vdc
measure voltage with battery connected
40
Mighty Mule 352
Repair Service
If your Mighty Mule® 352 Gate Opener is not operating properly, please follow the steps below:
1. First use the procedures found in the Visual and Audible Diagnostic Indicators section (see page 39).
2. Use the Online Troubleshooter at http://support.gtoinc.com/support/troubleshooter.aspx.
3. If you are unable to solve the problem, call the GTO Service Department at (800) 543-1236, or
(850)575-4144. Refer to the serial number (located on the back of opener arm) and date of purchase when calling for assistance.
4. If repair or replacement of your gate opener is necessary, the Service Department will assign a
Return Goods Authorization (RGA) number to you for all warranty repairs
5. Securely pack the component(s) authorized for return to the factory. Include a copy of your receipt for proof of purchase. Write the RGA number issued to you on the outside of the package in
LARGE BOLD PRINT. Ship the package(s) freight prepaid to:
Gates That Open, LLC • 3121 Hartsfield Road • Tallahassee, Florida, USA 32303.
NOTE: Products returned to GTO without a Return Goods Authorization (RGA) number in
LARGE BOLD PRINT on the outside of the package WILL NOT be accepted. Also, items
returned to GTO freight collect WILL NOT be accepted.
®
E-Z GATE OPENERS
For more information on Mighty Mule’s full line of Automatic Gate Openers and Access Controls visit our website at www.mightymule.com
For 24 hour/day, 7 day/week Technical Service visit
http://support.gtoinc.com/support/troubleshooter.aspx
The GTO Technical Service Department is open
Monday – Friday 8:00 A.M. – 7:00 P.M. (Eastern Time)
1-800-543-1236
For sales call toll free:
1-800-543-GATE (4283)
Gates That Open, LLC
3121 Hartsfield Road • Tallahassee, Florida, USA 32303 • (850) 575-0176
Fax (850) 575-8912 • www.mightymule.com
M i g h t y M u l e 3 5 2 41
Column Installation Information
IF THIS OPENER WILL BE USED WITH GATES THAT ARE MOUNTED ON
MASONRY, BRICK, OR ROCK (etc.) COLUMNS:
READ THE FOLLOWING CAREFULLY BEFORE PROCEEDING
A.
The simplest solution is to install the opener in a push-to-open configuration (requires Push-ToOpen Bracket, see Accessory Catalog). The minimum clearance is easier to achieve and clearance
is no longer a problem, since the opener will be pushing the gate away from the column instead of
pulling it toward the column. It is recommended that you place a steel plate between the opener
mounting brackets and masonry surface for additional strength.
B.
If a push-to-open installation is impossible due to traffic hazards, terrain, etc., another option is
to re-hang the gate. You may hang it on a post, either in the center of the column or at the back
corner, or move the gate to the back corner of the columns.
C.
The most difficult solution is to cut a notch in the column to accommodate the opener and power
cable. This job is NOT for the inexperienced!
Column Mount Example
(A + B can not exceed 14 inches)
Example: If A is 2" then B can not exceed 12"
A
Pivot Bracket
B
Gate
Column
Hinge
42
Mighty Mule 352
®
E-Z GATE OPENERS
ACCESSORIES
Accessories are Available From Your Retail Store
Solar Panel (FM123) 10 watt (FM121) 5 watt - requires two - 5 watt panels
The Solar Panel is a 10 watt solar powered battery charger for use with the FM350 & FM352 gate
operator systems. Particularly suited for remote installations, each Solar Panel comes with tubular
steel support, mounting clips, wire connectors, and 8 ft. of low voltage wire (see Low Voltage Wire
for additional wire). The Mighty Mule® 352 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. Dual gates require a minimum of 10 watts of solar
charging power. (5 watt panels require 2 panels)
Push Button Control (FM132)
Unlit doorbell button for remote entry or exit control. Wires directly to the control board and uses 16
gauge multi-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® 352 gate openers.
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.
(battery is included)
Single Button Transmitter (FM135)
The Mighty Mule® entry transmitter, with adjustable code settings, is standard equipment with all
Mighty Mule® 352 systems. (battery is included)
Digital Keypad (FM137)
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The specially designed digital keypad can be easily installed as a wireless or wired keypad. It can
be programmed to use up to 25 different personal identification number (PIN) codes. Each code is
face programmable with additional security features built in. Wired installations require 16 gauge,
low voltage, multi-stranded, dual conductor, direct burial wire (sold separately). Requires 3 AA
batteries (not included).
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 opener models (see Sensor Box for model compatibility).
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.
A wireless version of the Gate Opening Sensor is available. (FM130)
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Accessories are Available From Your Retail Store (con't)
Automatic Gate Lock Pull-to-Open (FM143)
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AUTO LOCK
GATE
A MUST for added security. Solenoid driven, with a steel housing. Unlocks and locks automatically
as gates open and close. Used with Mighty Mule® DC swing gate operating systems for maximum
stability and security. Comes with a keyed manual release. Recommended for gates over 8 ft. long.
Ideal for animal enclosures or high wind areas.
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 of temporary. Can be wireless up to 500 feet or hard wired up to 1000 feet.
Additional base stations available (F3101MBC).
Low Voltage Wire (RB509)
The 16 gauge, multi-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.
Driveway Alarm (FM131)
Keep track of the comings and goings on your property with this electromagnetic sensor alert
system. When a vehicle passes the sensor, the receiver emits an audible tone and lets you know
someone’s there. Functional range of up to 400 ft. Easy-to-install and stake is included in kit.
Transmitter requires 2 “C” batteries (not included)
Wireless Driveway Vehicle Sensor (FM130)
The wireless gate opening sensor offers hands free operation of the Mighty Mule Gate Opener. Works
wirelessly up to 100 feet from the gate. Transmitter, receiver and two AA batteries are included.
Push to Open Bracket (FM148)
Required when Mighty Mule® 350/352 gate operator(s) must push the gate open, such as on a sloping
driveway or where space prevents gate(s) from opening inward (pulled open). Order two PTO brackets for
conversion of a dual swing gate installation.
Column Mount Lock Receiver (433IH)
For mounting the Automatic Gate Lock on brick columns, walls, or for other applications with limited
space between gate and post.
Replacement Transformer (RB570)
Standard 18 volt, 2200 mA, AC transformer for maintaining the battery included with the Mighty Mule®
352 gate operator. This is the only transformer approved for use with all UL325 Mighty Mule® gate
operator systems.
Universal Receiver (RB709U-NB)
The Universal Receiver allows you to use the same Mighty Mule® 352 entry transmitter to operate your
gate operator and your garage door operator. Compatible with most garage door operators.
If you have a question about any special order item,
just call 1-800-543-GATE!
The contents of all material available on this installation manual are copyrighted by Gates That Open, LLC (“GTO”), unless otherwise indicated. All rights are reserved by GTO, 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 GTO. Any reprinting of GTO
publications is by permission only. Copyright infringement is a violation of federal law.
Mighty Mule¨, E-Z Gate¨, GTO¨, are registered trademarks of Gates That Open, LLC, America’s DIY Automatic Gate Openers is a trademark of Gates That Open, LLC and are the exclusive
property of Gates That Open, LLC (“GTO”).
All rights are reserved by GTO, and these marks may not be used, in any for without the prior, written permission of GTO.
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