GTO SW-2502 User manual

©2007 GTO, Inc.
Installation Manual for the
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, Inc. 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, Inc. 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 operators are intended for use on vehicular gates only and
should never be used by pedestrians.
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.
R2502INST rev - 04/18/07
GTO/PRO • 3121 Hartsfield Road • Tallahassee, Florida, USA 32303
Telephone GTO/PRO Sales: 1-800-543-GATE (4283) or [phone] • Fax [phone]
or GTO/PRO Technical Service: 1-800-543-1236 or [phone] • Fax [phone]
www.gtopro.com
Dual Automatic Gate Operators
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©2007 GTO, Inc.
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 GTO for service or assistance with your automatic gate
Serial Number ____________________ Date of Purchase ____________________
Place of Purchase ____________________
Remember to keep all receipts for proof of purchase.
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
Conversion Chart
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.
Restricted Access Vehicular Gate Opener–Class IV: A vehicular gate opener (or system) intended for use in
a guarded industrial location or building such as an airport security area or other restricted access locations not
servicing the general public, in which unauthorized access is prevented via supervision by security personnel.
The GTO/PRO SW-2502 Gate Opener is intended for use with vehicular swing gates. The opener can be used in Class
I, Class II, Class III and Class IV applications.

Gate Opener Class Categories ------------------------------------------------------------- inside cover
Units and Standards Conversion Chart ---------------------------------------------------inside cover
PLEASE READ THIS FIRST! --------------------------------------------------page iii
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
Technical Specifications -------------------------------------------------------------page 10
Installation Overview ------------------------------------------------------------------ page 11
Installation of the Mounting Hardware ----------------------------------------------page 12
Mounting the Master Arm -------------------------------------------------------------page 16
Installing the Slave Arm ---------------------------------------------------------------page 16
Installation of the Closed Position Stops --------------------------------------------page 17
Mounting the Control Box-------------------------------------------------------------page 19
Connecting the Opener Power Cables -----------------------------------------------page 20
Powering the System --------------------------------------------------------------page 21
Solar Chart-------------------------------------------------------------------------------page 21
Connecting the Transformer-----------------------------------------------------------page 21
Control Board Settings ----------------------------------------------------------page 24
Main DIP Switches ---------------------------------------------------------------------page 24
Setting Closed Position Limits--------------------------------------------------------page 25
Setting Your Personal Transmitter Code ---------------------------------------------page 26
Stall Force--------------------------------------------------------------------------------page 27
Installing the Receiver -----------------------------------------------------------page 27
Connecting Additional Safety Devices ----------------------------------------page 28
Connecting Accessories ----------------------------------------------------------page 30
Push to Open Installation --------------------------------------------------------page 32
Setting Open Position Limits----------------------------------------------------------page 33
Warranty and Repair Service --------------------------------------------------page 34
Troubleshooting Guide -----------------------------------------------------------page 35
Column Installation Information ----------------------------------------------page 38
Accessory Catalog ----------------------------------------------------------------page 39
Table of Contents
KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE

iii
PLEASE READ THIS FIRST!
Thank you for purchasing a GTO/PRO-SW2502 When correctly installed and properly used, your GTO/PRO-
SW2502 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. This manual will enable you to properly install your GTO/PRO-
SW2502 Automatic Gate Operator.
The GTO/PRO-SW2502 Operator is designed for installation on pull-to-open gates (gates that open into the
property). By purchasing an accessory bracket, the GTO/PRO-SW2502 Operator can accommodate push-to-open
gates (gates that open out from the property). The gates must not exceed 16 feet in length (per leaf) nor weigh more
than 500 pounds (per leaf) (please see Technical Specifications on page 10). The GTO/PRO-SW2502 Operator
can be used on vinyl, aluminum, chain link, farm tube, and wrought iron gates. Use on solid (wood) gates is not
recommended. Solid surface gates have a high resistance to the wind. If the wind is strong enough, the operator will
obstruct and stop.
The GTO/PRO-SW2502 Operator accommodates extra transmitters, digital keypads, solar panels, push buttons,
automatic gate locks, and other access control products. These optional accessories (see the enclosed GTO/PRO
Accessory Catalog) are available.
The GTO/PRO-SW2502 Operator 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 GTO/PRO-SW2502 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.
Please call GTO/PRO at (800) 543-GATE [4283] or [phone] for more information about our GTO/PRO
professional line of gate operators and accessories. Our Sales Department will be glad to give you the name and phone
number of a GTO/PRO dealer near you.
PLEASE NOTE—If your application requires any of the following:
Swing gates longer than 16 feet or weighing more than 500 pounds;
Slide gates;
Heavy duty or commercial uses;
Professional installation;
please call GTO at (800) 543-GATE [4283] or [phone] 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 videotape and read these instructions carefully and completely
to become familiar with all parts and installation steps. The video tape is only designed as
a 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.

1
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/PRO 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.
NOTE: Substitute a Pin Lock for the clevis pin on the front
mount of each gate opener to prevent unauthorized removal of
the opener from the gate (see Accessory Catalog).
Disconnecting the operator
1. Turn operator power switch OFF.
2. Remove hairpin clip, clevis pin, and bushing
from the front mounting point.
3. Remove the operator from the mount.
The gate can be opened and closed manually
when the operator is disconnected.
To Manually Open and Close the
Gate, Follow the Procedure Below:
CAUTION: The gate will move freely and uncontrolled when the gate operator is
removed from the gate. ONLY disconnect the operator when the operator power
switch is OFF and the gate is NOT moving.
Clevis Pin
Hairpin Clip
Gate Bracket
Front or Rear Mount
Bushing
CAUTION: Because the GTO/PRO gate operator is
battery powered, disconnect the operator ONLY when the
power switch on the operator is turned OFF. Unplugging
the transformer does not turn power to the operator OFF.
IMPORTANT: NEVER allow operator arm to hang by
the front mount - it will break from the arm weight.

2
IMPORTANT SAFETY INSTRUCTIONS
ZONE 2
ZONE 3
ZONE 4
ZONE 5
ZONE 1
ZONE 2
ZONE 4
ZONE 5
ZONE 3
For The Consumer
WARNING: To reduce the risk of injury or death:
1. 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.
2. 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 dual opener is proper for the type and size of gate, its frequency of use and the proper class rating.
2. Make sure the dual 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.
3. 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.
Entrapment Zones for a
Pull-To-Open Application

3
IMPORTANT SAFETY INSTRUCTIONS
Entrapment Zones for a proper Pull-To-Open installation:
Zone 1 – leading edge of the master and slave gates - Area between two gates.
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. Devices such as contact sensors (safety edges) and non contact sensors (photo beams) provide additional protection
against entrapment.
4. 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
Moving Gate
Area
Moving Gate
Area
NEVER INSTALL
any control device
within gray area

4
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/PRO 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 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 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.
7. Service the gate and gate opener regularly. Grease hinges, spray push/pull tube with high quality silicone spray and
replace the battery every 3-5 years.
8. 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/PRO Service Department.
9. Disconnect the opener ONLY when the power is TURNED OFF and the gate is NOT moving.
10. Make arrangements with local fire and law enforcement for emergency access.
11. Distribute and discuss copies of the IMPORTANT SAFETY INSTRUCTIONS section of this manual with all
persons authorized to use your gate.
12. 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.
Should you lose or misplace this manual, a copy can be obtained by
downloading one from the GTO/PRO web site (www.gtopro.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

5
IMPORTANT SAFETY INSTRUCTIONS
Secondary Means of Protection Against
Entrapment
As specified by Gate Operator 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 GTO/PRO utilizes Type A, an inherent (i.e., built-in) entrapment sensing system as the primary type
of entrapment protection. Also, the GTO/PRO has provisions for the connection of Type B2 protection to be used as the
secondary type of entrapment protection, if desired.
1. For gate operators utilizing a contact sensor (e.g., safety edge sensor– Type B2) in accordance with UL 325 (51.8.4 [i]):
A. 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.
B. 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.
C. 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.
ENTRAPMENT ALARM (UL 325; 30A.1.1A)
The GTO/PRO gate operator 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 hard wired 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.
Bottom Edge Contact Sensor
on both sides of the gate
Leading Edge Contact Sensor
on both sides of the gate
Post Edge Contact Sensor
on both sides of the gate
Post Edge Contact Sensor
on both sides of the gate
Vehicular GateVehicular Gate
500
UL325SERIES
®
E-ZGATEOPENER
1-800-543-GATE(4283)
www.mightymule.com

6
IMPORTANT SAFETY INSTRUCTIONS
Install Warning Signs
Entrapment Protection
GTO/PRO SW2502 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.
Required Safety Precautions for Gates
Warning Signs
The warning signs (at right) must
be installed on both sides of the
gates (see page 7 for details).
Warning signs alert people of automatic gate operation and are required when installing the GTO/PRO gate operator.
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.
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.
Moving Gate Can Cause
Injury Or Death
WARNING
!
Warning SignWarning Sign Contact Sensor
(
recommended, not included
)
Contact Sensor
( recommended, not included )
Pedestrian Gate
Bulldog Pedestrian
Gate Lock
(recommended, not included )
Vehicular GateVehicular Gate
Contact Sensor
( recommended, not included )
Contact Sensor
( recommended, not included )

7
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.
!
Warning signs (2 enclosed) to be installed on each side
of the gate (3–5 feet above the bottom of the gate)
Maximum Gate: 500 lb. (226.7 kg); 16 ft. (4.8 m)
Voltage: 12 Vdc; Frequency: 0 Hz; Power: 25 W
Class I, II, III and IV Vehicular Swing Gate Operator.
Serial Number: XXXXXXXXXX
#xxxxxxx
Conforms to UL 325 STANDARDS
TO MANUALLY OPEN AND CLOSE THE GATE:
1. Turn control box power switch OFF.
2. Disconnect front or rear mount from gate bracket.
3. Pull opener away from front or rear mount.
DC 2500 Series
GTO, Inc. Tallahassee, Florida USA
Disconnect operator ONLY when the control box power
switch is OFF and the gate is NOT moving.
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Product identification and manual operation instruction
label (1) installed on right hand side of the control box
Logo and warning labels (2) installed on each side of
opener housin
g
C

8
Dual Gate Opener Parts List
Opener and Mounting Hardware
Hairpin Clip (4)
3/8" x 1-1/2" Clevis Pin (4)
5/16" x 1-3/4" Bolt (2)
3/8" x 2" Bolt (2)
3/8" x 3" Bolt (4)
3/8" x 8" Bolt (8)
8" Nylon Cable Tie (20)
3/8" Washer (18)
3/8" Lock Washer (14)
5/16" Washer (2)
3/8" Nut (14)
5/16" Nut (2)
Hardware
Gate Opener Arm (1)
w/ 6' Power Cable
Gate Opener Arm (1)
w/ 32' Power Cable
Gate Bracket (2) Post Pivot Bracket (2)
Customer Support Card (1)
Post Bracket (4)
Closed Position
Stop Plate (2)
2" Mounting Screw (5)
®
E-ZGATEOPENER
3/8" Bushings (4)

9
Tools Needed
• Power Drill
• Open End Wrenches — 3/8", 7/16", 1/2", and 9/16"
• 3/8" Drill Bit
• Hacksaw or Heavy Duty Bolt Cutters
• Small (Flat Bladed) Screwdriver
• Phillips Screwdriver
Dual Gate Opener Parts List (continued)
Control Box and Electrical Components
Transformer (1)
Battery (1)
Control Box (1)
Warning Signs (2)
GTO Transmitter(1)
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.
Moving Gate Can Cause
Injury Or Death
WARNING
!
Receiver (1)
• Tape Measure
• Level
• Wire Strippers
• C-Clamps — small, medium, and large
• Center Punch
• An 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 39):
• 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 Powering the System on page 21, 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 10 to 30 Watts of solar charging
power to trickle charge the battery. 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.
• If your fence post is larger than 6" in diameter you will need threaded rods or carriage bolts longer than 8". See page 15.
• 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.
• If the gate is a push-to-open refer to page 32.
• Additional washer or a metal plate may be needeed for wooden post.
• For Push-to-open applications, you'll need the push-to-open bracket 347 IH
• Low profile ground stop. See page 18, step 3.

10
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 680
ft. lb. of torque at 12 V.
• Maximum opening arc of 110º. Approximate opening time (90º): 30 seconds, depending on weight of gate.
POWER
• The system is powered by a 12 Vdc, 7.0 Ah, sealed, rechargeable lead acid battery.
• Battery charge is maintained by a 120 Vac input, 18 Vac output transformer rectified to 14.5 Vdc (40 VA) through the
GTO/PRO control board. One (1) blade-style control board fuse is rated for 25 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.
• Battery charge is maintained by a GTO/PRO Solar Panel Charger: float voltage of 14.5 Vdc output is from a solar panel.
Generates a minimum of 10 W at 600 mA. A gated diode on the control board prevents battery discharge.
CONTROL
•GTO/PRO microprocessor-based control board is set for single 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 20 mA; "active draw" is 2 to 5 A.
• Auto-memorization of digital transmitter code.
•GTO/PRO remote-mounted RF receiver tuned to 318 MHz.
• Opener length with push-pull tube fully retracted is 401/4", mounting point to mounting point. Push/pull tube extends 22".
• Adjustable auto-close timer, and obstruction sensitivity.
• Power terminal block accommodates a transformer or solar panels.
• DIP switches simplify setup of gate opener.
• Accessory terminal lock is fully compatible with push button controls, digital keypads, safety loops, etc.
• 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 GTO/PRO SW-2502 Automatic
Gate Operator when powered with a transformer. Actual cycles may vary slightly depending upon the type and condition
of gate and installation.
GTO/PRO 2502 GATE OPERATOR
Technical Specifications
These specifications are subject to change without notice.
IMPORTANT: BALL BEAR-
ING HINGES SHOULD
BE USED ON ALL GATES
WEIGHING OVER 250 Lbs.
To determine the number of cycles the gate opener will perform using solar panels, please see the specifications
listed on page 21 or call [phone] or [phone] for more information.
* An operation cycle is one full opening and closing of the gate.
Gate Weight
Gate Length
Number of Cycles Per Day
GTO/PRO SW2502 Dual Gate Capacity / Cycle Chart
Estimated number of daily cycles, based on use with a transformer and one(1) 12 Volt battery.
500 lbs.
400 lbs.
300 lbs.
200 lbs.
150 lbs.
100 lbs.
50 lbs.
83
88
93
98
103
108
113
5’ - 6’
78
83
88
93
98
103
108
8’
73
78
83
88
93
98
103
10’
68
73
78
83
88
93
98
12’
63
68
73
78
83
88
93
14’
50
63
68
73
78
83
88
16’

11
Preparation of the Gate
Step 1
The gates must be plumb, level, and swing freely on
their hinges. Wheels must not be attached to the gates.
The gates must move throughout their arc without
binding or dragging on the ground. Note that gates
over 250 lb. should have ball bearing hinges with grease
fittings.
Step 2
The fence posts must be secured in the ground with
concrete so they will minimize twist or flex when the
openers are activated. We recommend you position the
openers near the centerline of the gates to keep the gates
from twisting and flexing. The addition of horizontal
or vertical cross members (if they are not already in
place) to provide a stable area for mounting the gate
brackets is also important.
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 gates. Mounting the
openers on a masonry column requires special procedures; see Column Installation Information on page 38 if you intend
to mount the openers on columns. Furthermore, if you have push-to-open gates, you will need to purchase two (2) push-
to-open brackets (see Accessory Catalog) to properly configure your system. See Push to Open Installation on page 32
before proceeding.
Horizontal Cross Member
Vertical Cross Member
Gate Swings Evenly and Freely
Hung Firmly and Plumb
Receiver
PVC conduit (not included)
to protect second opener
power cable and low voltage wire
from lawn mowers and weed eaters.
Post Bracket Assembly
Control Box with Battery
Gate Bracket
Master Gate Opener
Concrete Poured
Around Gate Post
Run 1000' (max.) of low
voltage wire to control
box from transformer
(wire not included).
6' Power Cable
Closed Position Positive Stop Plates
120 Volt Indoor
Transformer
(surge protector
not supplied)
Slave Gate Opener

12
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.
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.
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.
Post 
Bracket
Post 
Pivot Bracket
Metal Plate
Wooden Post
Post
Bracket
Post
Pivot Bracket
Metal Plate
Wooden Post

Center of Gate Hinge
Pull-to-Open Installation
Larger than 6" diameter post
Recommended Reinforcement Examples
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.
Thin Walled Tube Gate
Steel Pipe Cut in Half
Gate Bracket
Gate Bracket
Wood or Metal
Reinforcement
Gate Bracket
Panel Gate
1" x 6" Wood Reinforcement
(not supplied)
(not supplied)

13
Clevis Pin
Hairpin Clip
Post Bracket Assembly
Bushing
Rear Mount
Opener
Clevis Pin
Hairpin Clip
Bushing
Gate Bracket
Front Mount
Determining the Mounting Position
of the Post Bracket Assembly and the Gate Bracket
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.
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" lock
washer, 3/8" 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.
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.
3/8" x 2" Bolt
3/8" Nut
Post Pivot Bracket
Post Bracket
Post Bracket
3/8" Lock Washer
Post Bracket Assembly
3/8" Washer
Level Opener
Fence Post
Gate In Open Position 

LEVEL horizontal cross member
Post Bracket Assembly
Gate Bracket
NOTE: The following steps are
intended for pull-to-open gate
installations. If you are mounting
your opener on a push-to-open gate
(e.g., a gate on a sloped driveway)
you will need to purchase a Push
To Open bracket (see Accessory
catalog). Also, see Push-to-Open
Installation beginning on page 32.

14
Gate in the
CLOSED POSITION
Pinch Area
Gate in the
OPENED POSITION
Pinch Area
2" minimum
2" minimum
Be sure gate opener
and bracket don't bind.
Step 6
When you have achieved the required 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.
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.
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.

15
Installing the Post Bracket Assembly and Gate
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.
Step 8
Drill 3/8" holes into fence post
as marked.
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.
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.
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.
Gate Bracket Mounting Examples
Gate In Open Position 

LEVEL horizontal cross member
Mark cross member through middle of
gate bracket slots and drill 3/8" holes
Post Bracket
Assembly
Mark fence post through 
middle of bracket slots
and drill 3/8" holes
Round Metal Post
Round Wood Post
Square Metal Post
Square Wood Post
Remove excess bolt length 
with hacksaw or bolt cutters
SIDE VIEW
TOP VIEW
EXAMPLES
Round Tube & Chain Link Gate
Square Tube Gate
Mounting Plate 
Created for 
Decorative Gate
(required but not
supplied)

Remove excess bolt length 
with hacksaw or bolt cutters
FRONT VIEW SIDE VIEW
FRONT VIEW
SIDE VIEW

16
Mounting the Master Arm
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.
Level Opener
Gate In Open Position 

LEVEL horizontal cross member
Post Bracket Assembly
bolted to fence post
Clevis Pin, Bushing, and Hairpin Clip
Clevis Pin, Bushing, and Hairpin Clip
Gate Bracket bolted
to gate cross member
Fence Post
Mounting the Slave Arm
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 on the next page.