Lift-master SL575 User Manual

CONTROLLER BOARD

GL

Serial # ________________________
(located on electrical box cover)

Installation Date __________________

2 YEAR WARRANTY

MODEL SL575 IS FOR VEHICULAR PASSAGE

GATES ONLY AND IS NOT INTENDED FOR

PEDESTRIAN PASSAGE GATE USE

MODEL SL575

HEAVY DUTY SLIDE GATE OPERATOR

2

OPERATOR SPECIFICATIONS

Carton Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Operator Dimensions & Horsepower Chart . . . . . . . . . . . . . . . . .3

UL325 Model Classifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

OPERATOR WARNINGS

Safety Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . .5

Suggested Entrapment Protection Device Locations . . . . . . . . . .6

Safety Precautions for Open Roller Gates . . . . . . . . . . . . . . . . . .7

Warning Label Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

WIRING

Power Wiring Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

INSTALLATION

Mounting Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Pad Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Post Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Install Gate Bracket & Drive Chain . . . . . . . . . . . . . . . . . . . . . . .12

On/Off Switch Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Manual Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

ADJUSTMENT

Limit Switch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Hall Effect Sensor Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . .14

Gate System Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . .15

UL325 Entrapment Protection . . . . . . . . . . . . . . . . . . . . . . .15-16

Control Board Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Program Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Control Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . .18

Accessory Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-20

Sequenced Access Management System . . . . . . . . . . . . . . . . .21

OPERATION AND MAINTENANCE

Operator Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Friction Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Solenoid Actuated Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

GL Board Programming and Features . . . . . . . . . . . . . . . . .23-24

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25-26

Single Phase Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . .27

Three Phase Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .28

REPAIR PARTS

Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Illustrated Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Electrical Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Warranty Policy and Service . . . . . . . . . . . . . . . . . . . . . . . . . . .32

CARTON INVENTORY

Before beginning your installation check that all components
were supplied and received undamaged. Refer to list below for
factory supplied parts.

HARDWARE KIT

When you see these Safety Symbols and Signal Words on the
following pages, they will alert you to the possibility of SERIOUS
INJURY or DEATH if you do not comply with the warnings that
accompany them. The hazard may come from something
mechanical or from electric shock. Read the warnings carefully.

When you see this Signal Word on the following pages, it will
alert you to the possibility of damage to your gate and/or the gate
operator if you do not comply with the cautionary statements that
accompany it. Read them carefully.

Description Qty.

Safety Gate Brochure 1
Gate Bracket 2
Nickel Plated Chain #50 1
Master Link #50 2
Warning Sign 2
U-Bolt 2" 5/16-18 4
U-Bolt 3" 3/8-16 4
Flat Washer 7/16" 4
Hex Nut 3/8"-16 8
Lock Washer 5/16" 8
Lock Washer 3/8" 8
Eyebolt Chain #50 2
Hex Nut 5/16-18 8
Hex Nut 7/16-14 4
Set Screw 7/16-14 4
Flat Washer 3/8 8
Flat Washer 7/16 8
Spring Washer 7/16 4
Antenna 1

IMPORTANT NOTES

• BEFORE attempting to install, operate or maintain the operator,
you MUST read and fully understand this manual and follow all
safety instructions.

• These instructions are intended to highlight certain safety
related issues. These instructions are not intended to be
comprehensive. Because each application is unique, it is the
responsibility of the purchaser, designer, installer and end user
to ensure that the total gate system is safe for its intended use.

Mechanical

Electrical

TABLE OF CONTENTS

WARNING

CAUTION

WARNING

WARNING

WARNING

WARNING

WARNING

3

MODEL SL575

• 1/2 HP Motor

Gate Speed – 10"/sec. (25.4 cm/sec.)
Maximum Gate Weight – 1200 lbs. (544.3 kg)
Maximum Cantilever Gate Width – 25 ft. (7.6 m)
Maximum Overhead Roller Gate Width – 40 ft. (12.2 m)
Maximum V-Track Gate Width – 30 ft. (9.1 m)

• 1 HP Motor

Gate Speed – 10"/sec. (25.4 cm/sec.)
Maximum Gate Weight – 1800 lbs. (816.5 kg)
Maximum Cantilever Gate Width – 32 ft. (9.8 m)
Maximum Overhead Roller Gate Width – 50 ft. (15.2 m)
Maximum V-Track Gate Width – 45 ft. (13.7 m)

27.5"
(69.9 cm)

17.2"
(43.7 cm)

23.6"
(59.9 cm)

14.1"
(35.8 cm)

19.5"
(49.5 cm)

15.0"
(38.1 cm)

8.5"
(21.6 cm)

2.1"
(5.3 cm)

MODEL SL575

OPERATOR DIMENSIONS AND HORSEPOWER CHART

4

CLASS I – RESIDENTIAL VEHICULAR GATE OPERATOR

A vehicular gate operator (or system) intended for use in a home of one-to four single family dwellings,
or a garage or parking area associated therewith.

CLASS II – COMMERCIAL/GENERAL ACCESS VEHICULAR GATE OPERATOR

A vehicular gate operator (or system) intended for use in a commercial location or building such as a
multi-family housing unit (five or more single family units) hotel, garage, retail store or other building
servicing the general public.

CLASS III – INDUSTRIAL/LIMITED ACCESS VEHICULAR GATE OPERATOR

A vehicular gate operator (or system) intended for use in a industrial location or building such as a
factory or loading dock area or other location not intended to service the general public.

CLASS IV – RESTRICTED ACCESS VEHICULAR GATE OPERATOR

A vehicular gate operator (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.

SAFETY ACCESSORY SELECTION

All UL325 compliant LiftMaster gate operators will accept external
entrapment protection devices to protect people from motorized
gate systems. UL325 requires that the type of entrapment
protection correctly matches each gate application. Below are the
six types of entrapment protection systems recognized by UL325
for use on this operator.

ENTRAPMENT PROTECTION TYPES

Type A: Inherent obstruction sensing system, self-contained

within the operator. This system must sense and initiate
the reverse of the gate within two seconds of contact
with a solid object.

Type B1: Connections provided for a non-contact device, such as

a photoelectric eye, can be used as a secondary
protection.

Type B2: Connections provided for a contact sensor. A contact

device, such as a gate edge, can be used for secondary

protection.
Type C: Inherent adjustable clutch or pressure relief valve.
Type D: Connections provided for a control

requiring continuous pressure to

operate the operator open and close.
Type E: Built-in audio alarm. Examples

include sirens, horns or buzzers.

NOTE: UL requires that all installations must
have warning signs placed in plain view on
both sides of the gate to warn pedestrians of
the dangers of motorized gate systems.

UL325 ENTRAPMENT PROTECTION REQUIREMENTS

The chart above illustrates the entrapment protection
requirements for each of the four UL325 classes.

In order to complete a proper installation you must satisfy the
entrapment protection chart shown above. That means that
the installation must have one primary means of entrapment
protection and one independent secondary means of
entrapment protection. Both primary and secondary
entrapment protection methods must be designed, arranged
or configured to protect against entrapments in both the open
and close directions of gate travel.

For Example: For a slide gate system that is installed on a
single-family residence (UL325 Class I) you must provide the
following: As your primary type of entrapment protection you
must provide Type A inherent (built into the operator)
entrapment sensing and at least one of the following as your
secondary entrapment protection: Type B1- Non-contact
sensors such as photoelectric eyes, Type B2- Contact sensors
such as gate edges or Type D- Constant pressure control.

GATE OPERATOR ENTRAPMENT PROTECTION

Class
I & II

Class III

Class IV

A, B1, B2,

C or D

A, B1, B2,

C, D or E

A, B1, B2,

D or E

A, B1, B2

or D

A, B1 orB2A, B1, B2,

D or E

A, B1, B2

or C

A, B1, B2,

or C

A or C

B1, B2

or D

A

UL325 Slide Gate Operator Swing & Gate Barrier

Installation (Arm) Operator

Class

Primary

Type

Secondary

Type

Secondary

Type

Primary

Type

A, B1, B2,

C, D or E

UL325 MODEL CLASSIFICATIONS

Moving Gate Can Cause

Injury or Death

KEEP CLEAR! Gate may move at any
time without prior warning.

Do not let children operate the gate or
play in the gate area.

This entrance is for vehicles only.
Pedestrians must use separate entrance

5

1. Vehicular gate systems provide convenience and security. Gate systems are comprised of many component parts. The gate
operator is only one component. Each gate system is specifically designed for an individual application.

2. Gate operating system designers, installers and users must take into account the possible hazards associated with each individual
application. Improperly designed, installed or maintained systems can create risks for the user as well as the bystander. Gate
systems design and installation must reduce public exposure to potential hazards.

3. A gate operator can create high levels of force in its function as a component part of a gate system. Therefore, safety features
must be incorporated into every design. Specific safety features include:

• Gate Edges • Guards for Exposed Rollers • Photoelectric Sensors

• Screen Mesh • Vertical Posts • Instructional and Precautionary Signage

4. Install the gate operator only when:
a. The operator is appropriate for the construction and the usage class of the gate.
b. All openings of a horizontal swing gate are guarded or screened from the bottom of the gate to a minimum of 4' (1.2 m) above

the ground to prevent a 2-1/4" (57.15 mm) diameter sphere from passing through the openings anywhere in the gate, and in
that portion of the adjacent fence that the gate covers in the open position.

c. All exposed pinch points are eliminated or guarded, and guarding is supplied for exposed rollers.

5. The operator is intended for installation only on gates used for vehicles. Pedestrians must be supplied with a separate access
opening.

6. The gate must be installed in a location so that enough clearance is supplied between the gate and adjacent structures when
opening and closing to reduce the risk of entrapment. Swinging gates shall not open into public access areas.

7. The gate must be properly installed and work freely in both directions prior to the installation of the gate operator.

8. Controls must be far enough from the gate so that the user is prevented from coming in contact with the gate while operating the
controls.

9. Controls intended to be used to reset an operator after 2 sequential activations of the entrapment protection device or devices
must be located in the line of sight of the gate, or easily accessible controls shall have a security feature to prevent unauthorized
use.

10. All warning signs must be installed where visible, on each side of the gate.

11. For a gate operator utilizing a non-contact sensor:
a. See instructions on the placement of non-contact sensor for each type of application.
b. Care shall be exercised to reduce the risk of nuisance tripping, such as when a vehicle trips the sensor while the gate is still

moving.

c. One or more non-contact sensors shall be located where the risk of entrapment or obstruction exists, such as the perimeter

reachable by a moving gate or barrier.

12. For a gate operator utilizing a contact sensor such as an edge sensor:
a. A hard wired contact sensor shall be located and its wiring arranged so the communication between the sensor and the gate

operator is not subject to mechanical damage.

b. A wireless contact sensor such as the one that transmits radio frequency (RF) signals to the gate operator 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.

c. One or more contact sensors shall be located at the leading edge, trailing edge and post mounted both inside and outside of a

vehicular horizontal slide gate.
d. One or more contact sensors shall be located at the bottom edge of a vehicular vertical lift gate.
e. One or more contact sensors shall be located on the inside and outside leading edge of a swing gate. Additionally, if the bottom

edge of a swing gate is greater than 6" (152 mm) above the ground at any point in its arc of travel, one or more contact sensors

shall be located on the bottom edge.

SAFETY INSTALLATION INFORMATION

6

GATE SYSTEM (MASTER/SECOND SLIDE GATE)

GATE SYSTEM (COMMERCIAL SLIDE GATE)

SUGGESTED ENTRAPMENT PROTECTION DEVICE LOCATIONS

Close
Edge

STREET

6' (1.8 m)

Interrupt

Gate 2

Open

Edge

Photo Eyes for
Close Cycle

Loop

4' (1.2 m)
Typical

4' (1.2 m)
Typical

4' (1.2 m)
Typical

6' (1.8 m)

Gate 1

Interrupt

Loop

12'

COMPLEX

(3.7 m)

OR

PARKING LOT

Open
Edge

Photo Eyes for
Open Cycle

Run Twisted Wire
from Loop
to Operator

Seal Loops

1-1/2" (37 mm)

Loop Wire Layer

1/4" (6 mm) or Larger
Depending on Loop
Wire Size

Photo Eyes for
Open Cycle

Telephone
Entry
System

STREET

8' (2.4 m)

Interrupt

Loop

Photo Eye for
Close Cycle

4' (1.2 m)

4' (1.2 m)
Typical

4' (1.2 m)
Typical

4' (1.2 m)
Typical

Interrupt

Loop

Open
Edge

Close
Edge

COMPLEX

OR

Photo Eye for
Open Cycle

Run Twisted Wire
from Loop
to Operator

Seal Loops

1-1/2" (37 mm)

Loop Wire Layer

1/4" (6 mm) or Larger
Depending on Loop
Wire Size

PARKING LOT

7

NOT FOR USE AS PEDESTRIAN PASSAGE! This operator is
intended for vehicular use only. To prevent INJURY to
pedestrians, a separate pedestrian access should be supplied,
visible from the gate. Locate the pedestrian access where there is
not a chance of INJURY at any point during full movement of the
gate.

DO NOT MOUNT ACCESSORIES THAT ARE
ACCESSIBLE THROUGH GATE!

WARNING SIGN PLACEMENT

To prevent SERIOUS INJURY or DEATH from a moving gate:

• Install Warning signs on EACH side of gate in PLAIN VIEW.

• Permanently secure each Warning sign in a suitable
manner using fastening holes.

SAFETY PRECAUTIONS FOR OPEN ROLLER GATES

• Injuries occur when people get their hands or feet caught
between the top or bottom of the gate and the gate roller.
These potential pinch-points should be guarded against at all
times. Enclosed style gate tracks are available for refitting of
these rollers from many fence suppliers. Also, roller guards
are available for installing over the rollers.

• UL325 requires that, when used, contact sensors shall be
located at the leading edge, trailing edge, and be post
mounted both inside and outside of a vehicular horizontal
slide gate. Non-contact sensors such as photo eyes must
protect during both open and close gate cycles.

• Injuries occur when people put their hands and arms
through openings in the grill while the gate is operating.
They cannot retract their arm and it gets caught between the
moving gate grill and the stationary fence post or fence. This
potential hazard can be averted by placing a 4' (1.2 m)
screen mesh on the gate to prevent access through openings
anywhere the gate may travel. See Safety Brochure for
details. To prevent entrapment injuries, mount controls at
least 6' (1.8 m) from the gate or any moving parts of the
gate.

WARNING

WARNING

WARNING

WARNING

Gate Edge on
Rear of Gate for
Open Direction

Gate Edge on Fence
Post for Open Direction

Gate Edge On
Leading Edge of Gate
For Close Direction

Photo Beam
for Open
Direction

Pinch-Point
Hazard

Gate Edge

Unit

Additional Post Mounted Gate
Edge for Close Direction

Photo Beams Anytime They Are

Pinch-Point
Hazard

Vertical Post Placed On Both
Sides of the Exposed
Rollers Can Prevent Hands
From Reaching These
Pinch-points

Gate Edge
For Open Direction

Gate Edge for
Close Direction

Photo Beam for
Close Direction

Additional Post Mounted Gate
Edge for Open Direction

Always Te st Gate Edges And

Adjusted Or Serviced

Gate Edge
For Close
Direction

Moving Gate Can Cause

Injury or Death

KEEP CLEAR! Gate may move at any
time without prior warning.

Do not let children operate the gate or
play in the gate area.

This entrance is for vehicles only.
Pedestrians must use separate entrance

8

POWER WIRING INSTALLATION

Wiring Specifications (STRANDED COPPER WIRE)
On a Dual Gate System, each unit must be installed on ITS OWN separate circuits

NOTE: Calculated using NEC guidelines. Local codes and conditions must be reviewed for suitability of wire installation. All power
wiring should be dedicated and protected. Location of primary power disconnect should be labeled.

To reduce the risk of SEVERE INJURY or DEATH:

• ANY maintenance to the operator or in the area near the
operator MUST not be performed until disconnecting the
electrical power and locking-out the power via the operator
power switch. Upon completion of maintenance the area
MUST be cleared and secured, at that time the unit may be
returned to service.

• Disconnecting power at the fuse box BEFORE proceeding.
Operator MUST be properly grounded and connected in
accordance with local electrical codes. NOTE: The operator

should be on a separate fused line of adequate capacity.

• ALL electrical connections MUST be made by a qualified

individual.

• DO NOT install any wiring or attempt to run the operator
without consulting the wiring diagram. We recommend that
you Install an optional reversing edge BEFORE proceeding with
the control station installation.

• ALL power wiring should be on a dedicated circuit and well
protected. The location of the power disconnect should be
visible and clearly labeled.

• ALL power and control wiring MUST be run in separate
conduit.

• BEFORE installing power wiring or control stations be sure to
follow all specifications and warnings described below. Failure
to do so may result in SEVERE INJURY to persons and/or
damage to operator.

WIRING

WARNING

WARNING

SINGLE PHASE

115 VAC 230 VAC

THREE PHASE

230 VAC 460 VAC 575 VAC

WIRE GAUGE 6

• 1/2 HP Motor ------ 425 ft. (129.5 m) 1845 ft. (562.4 m) 2557 ft. (779.4 m) 12789 ft. (3898.1 m) 15987 ft. (4872.8 m)

• 1 HP Motor---------- 213 ft. (64.9 m) 852 ft. (259.7 m) 1278 ft. (389.5 m) 5115 ft. (1559.1 m) 7993 ft. (2436.3 m)

WIRE GAUGE 8

• 1/2 HP Motor ------ 269 ft. (82 m) 1165 ft. (355.1 m) 1614 ft. (492 m) 8072 ft. (2460.4 m) 10089 ft. (3075.1 m)

• 1 HP Motor---------- 134 ft. (40.8 m) 537 ft. (163.7 m) 807 ft. (246 m) 3228 ft. (983.9 m) 5044 ft. (1537.4 m)

WIRE GAUGE 10

• 1/2 HP Motor ------ 168 ft. (51.2 m) 730 ft. (222.5 m) 1012 ft. (308.5 m) 5064 ft. (1543.5 m) 6330 ft. (1929.4 m)

• 1 HP Motor---------- 84 ft. (25.6 m) 337 ft. (102.7 m) 506 ft. (154.2 m) 2025 ft. (617.2 m) 3165 ft. (964.7 m)

WIRE GAUGE 12

• 1/2 HP Motor ------ 105 ft. (32 m) 458 ft. (139.6 m) 634 ft. (193.2 m) 3171 ft. (966.5 m) 3964 ft. (1208.2 m))

• 1 HP Motor---------- 53 ft. (16.2 m) 211 ft. (64.3 m) 316 ft. (96.3 m) 1269 ft. (386.8 m) 1982 ft. (604.1 m)

9

INSTALLATION

MOUNTING CONFIGURATIONS

PAD MOUNT

NOTE: For the following instructions refer to Figures 1 and 2.

For your convenience, the new SL575 model LiftMaster Gate
operator comes configured from the factory to meet the pad
mounting of the original LiftMaster SL570 model. If you are
replacing a unit other than the SL570 or if you prefer for a new
installation, the SL575 can be reconfigured to mount to a (10-7/8"
x 21-1/8") pad mount by following these instructions:

1. Remove the bolts attaching the inside lower mounting angle
(1) to the frame uprights (2).

2. Reattach the lower mounting angle (1) to the outside of the
frame uprights as shown; be sure the frame is “squared” and
tighten all hardware securely.

POST MOUNT

NOTE: For the following instructions refer to Figures 3 and 4.

For your convenience, the new SL575 model LiftMaster Gate
operator comes configured from the factory to meet the inside
frame post mounting of the original LiftMaster SL570 model (26"
outside to outside of posts). If you are replacing a unit other than
the SL570 or if you prefer for a new installation, the SL575 can
be reconfigured to mount to an inside the frame post mount
dimension of 24-1/8" outside to outside of posts by following
these instructions:

1. Identify the side of the frame which has the “slotted”
attachment holes in the motor mounting plate (3).

2. Loosen the bolts attaching the frame upright (2) to the motor
plate (3) and the bolts attaching the lower mounting angles (1)
to the upright (2).

3. Remove the four bolts that are not in the slotted holes.

4. Reposition the frame upright (2) by sliding inward towards the
opposite upright until the through holes line up. Replace the
four bolts removed in step 3; be sure the frame is “squared”
and tighten all hardware securely.

3

2

1

Figure 1: Factory Configured

Figure 2: Field Reconfigured

Figure 3: Factory Configured

Figure 4: Field Reconfigured

2

1

2

1

2

3

1

10

PAD MOUNTING

CONCRETE PAD PREPARATION

NOTE: For the following instructions refer to Figures 1 and 2.

1. Lay out concrete pad as detailed in Figure 1.

2. Locate electrical conduit, as required, prior to pouring

concrete.

3. Pour concrete pad.

4. Secure operator (Figure 2) to the concrete pad using (4) 1/2"

concrete anchors (not provided).

Figure 1

Figure 2

4"

8-1/2"

Rear of Gate
or Back Frame

Fence Line

1"

18"

Using suitable hardware
secure operator to L-bolts

7"

22"

36"

Drive and idler sprocket
toward gate side

Power and control
wiring should be run
in separate conduit

Concrete
Anchor Holes

1/2" Concrete anchors
(4 required)

Concrete Pad

2" to 4" above grade

Depth required by local
codes or below frost line

11

3" U-bolt
(4 required)

Power and Control
Wiring Should Be Run In
Separate Conduit

Drive and Idler
Sprocket Toward
Gate Side

Angle
Bracket

POST MOUNTING

NOTE: For the following instructions refer to Figures 1 and 2.

1. Locate and anchor two posts made of 3" outer diameter heavy walled pipe. Posts should be parallel and square to the gate.

2. Remove the mounting angles from base of the operator. Use the angles as a guide for proper distance between posts. Secure the

angles to the posts using U-bolts provided.

3. Locate electrical conduit, as required, prior to pouring concrete.

4. After concrete has set, remove angle brackets from post and reinstall on operator.

5. Secure operator to posts using (4) 3" U-bolts and hardware provided.

Figure 2

SL575

8"

Ground Level

Depth As Required By
Local Codes or Below

Frost Line

14" min.

Gate

Outside to Outside

Fence Line

26"6"

End Post

L

C

3" Outside Diameter
Heavy Wall Fence Pipe

Figure 1

3" (7.6 cm)
U-bolts

12

Figure 1

* *

* Gate Brackets Must Be Level and Centered
With Bottom of Idler Sprocket

Figure 2

1. Mount gate brackets to the vertical front and rear posts of the

gate (Figure 1).

2. Remove the operator cover.

3. Locate and engage the manual disconnect and lock it in place

(refer to page 14).

4. Connect chain take-up bolt to the end of the chain and attach

to the rear gate bracket (Figure 2).

5. Ensure that the drive and idler sprockets are in line with each

other. Thread the chain through the plastic chain guide, around
drive and idler sprockets, and then through the second plastic
chain guide toward front gate bracket (Figure 3).

6. Adjust the chain to proper length and attach second take-up

bolt to chain end. Secure the take-up bolt to the front gate
bracket as shown.

Adjust nuts on chain take-up bolts to remove chain slack. A
general rule of thumb is to leave a maximum of 1" of chain slack
for every 10' of chain length.

Do not overtighten chain.

NOTE ABOUT SOME TYPES OF CANTILEVER GATES:

With some cantilever gates over 20' long, you may need to add a
brace along the length of the gate to prevent the gate from
bowing when chain is tightened. This may also be required on
some styles of gates that are constructed out of aluminum. If
positioned properly, this brace can also be used as a chain
support.

Figure 3

INSTALL GATE BRACKET & DRIVE CHAIN

To prevent damage to the operator or gate, DO NOT drive the

limit (nuts) actuators on the shaft past their normal positions.

WARNING

CAUTION

WARNING

WARNING

Gate

2" (5.1 cm) U-bolts
With Lock Washers
and Nuts

Gate Bracket

“Outside”

“Inside”

Anti-Rotation
Set Screw

Gate Bracket

Idler Sprocket

Drive Sprocket

Gate Post

Idler Sprocket

Insert Chain Through Plastic Guides

Safety Bracket

13

IMPORTANT NOTE: On three phase operators, power connections
must be properly phased. If phased incorrectly, the gate operator
will run reversed. To correct this situation, shut off power at main
power source and at the operator’s electrical disconnect switch.
Then reverse any two of the three power leads.

ON/OFF SWITCH POWER WIRING

NOTE: Before running power wiring refer to wiring specifications
on page 8 for correct wire gauges.

Secure all electrical power connections inside the disconnect
switch electrical box. Refer to electrical wiring diagrams on pages
27 and 28.

SINGLE PHASE

All single phase 115V/208/230V operators will have the
following:

• L1 White

• L2 Black

• Ground, Green

THREE PHASE

All three phase operators will have the following:

• L1 Black

• L2 Black

• L3 Black

• Ground, Green

115V SINGLE PHASE

POWER SWITCH ASSEMBLY

230V SINGLE PHASE &

THREE PHASE

POWER SWITCH ASSEMBLY

14

MANUAL DISCONNECT

NOTE: Make sure the limit nuts are positioned between the limit
switch actuators before proceeding with adjustments.

1. Remove control panel cover and locate the limit switch

assembly.

2. Disengage the unit’s manual disconnect (see above), then

manually open the gate to its full open position (note direction
of limit nut travel).

3. Adjust the open limit nut by depressing the retaining bracket

to allow nut to spin freely. Adjust open limit nut so that it trips
the open limit switch. After adjustment, release plate and
ensure it seats fully in slots of both nuts.

4. Manually close the gate to its full closed position.

5. Disengage the retaining bracket and rotate the close limit nut

until it trips the close limit switch.

6. Re-engage the retaining bracket into both limit nuts and also

re-engage the manual disconnect.

DIRECTION OF
GATE TO OPEN

RIGHT

LEFT

OPEN
LIMIT

A

B

CLOSE

LIMIT

B

A

LIMIT SWITCH ADJUSTMENT

LIMIT DIRECTION

NOTE: When the operator is under load, you may find it
necessary to relieve the tension on the drive chain before
disengaging the system.

n
v

To reduce the risk of SEVERE INJURY or DEATH:

• Disconnect power BEFORE performing ANY adjustments.

WARNING

WARNING

HALL EFFECT SENSOR ADJUSTMENT

NOTE: Normally the hall effect sensor does not need adjustment,
but may go out of alignment due to shipping vibration or rough
handling.

These operators use an internal entrapment protector system.
This system consists of the GL control board, magnet, and Hall
Effect sensor. It may become necessary to adjust the sensor for
correct alignment. To do so please perform the following steps:

1. The sensor must be
centered over the magnet
wheel. Adjust with
horizontal screws.

2. The sensor must be
level.

3. The sensor air gap
should be adjusted to
.010 - .015 of an inch.
(The thickness of a
business card may be
used to gauge the
correct distance.) Adjust
with vertical screws.

MODEL SL575
DISENGAGEMENT: Pull the disconnect chain and engage it

in the slot provided. The gate may now
be moved manually.

RE-ENGAGEMENT: Release the chain from the slot. (Some

operator output sprocket rotation may
be required for engagement).

ADJUSTMENT

Vertical Adjustment

Screws
Horizontal Adjustment
Screws

Hall Sensor

.010 - .015"

(.25 - .38 mm)

Air Gap

Magnet

Limit Switch

Limit Nut A

Limit Switch

Limit Nut B

Retaining
Bracket

Depressed Plate

Each Notch of the Nut Indicates a
Estimated 1" (2.5 cm) of Gate Tra

15

GATE SYSTEM TEST PROCEDURES

Make sure that the gate’s path is clear from any obstructions and that all associated gate hardware is properly mounted and
secured.

1. With the power off, manually move the gate to the fully closed position.

2. At the closed position, turn the power on and observe the GL controller board’s diagnostic and limit LEDs. When power is turned
on, these LEDs should flash simultaneously for a few seconds.

3. Locate the 3-button control that is built into the electrical box.

4. Push the open button and observe the operator’s behavior. The gate should begin opening. If the operator fails to open or has
difficulty opening, refer to the troubleshooting section.

5. Once at the open limit, the gate will stop. Push the close button and observe the operator’s behavior. If the operator fails to close or
has difficulty closing, refer to the troubleshooting section.

6. While the gate is closing, push the stop button. The gate should now stop.

7. Push the close button to return the gate to the fully closed position.

UL325 ENTRAPMENT PROTECTION

PRIMARY ENTRAPMENT PROTECTION ADJUSTMENTS
Force Control

Set the force control pot such that the unit will complete a full
cycle of gate travel but can be reversed off an obstruction without
applying an unreasonable amount of force. On most operators
this will be around the middle of the range.

SECONDARY ENTRAPMENT PROTECTION ADJUSTMENTS
Terminals 9 & 5 - Obstruction While Opening

(Edge/Photo Eye Input)
Edge Input: See Programming Section on page 17.

This input will reverse an opening gate to the close limit.
Activating this input when the gate is closing will have no effect.

NOTE: If upon reversal a second separate obstruction is detected
(gate edge or RPM sensor), gate will stop and alarm.

Photo Eye Input: See Programming Section on page 17.
This input will pause an opening gate. Once the input (photo eye)

is cleared, the gate continues to open. Activating this input when
the gate is closing will have no effect.

Terminals 10 & 5 - Obstruction While Closing
(Edge/Photo Eye Input)

Edge Input: See Programming Section on page 17.

This input will reverse a closing gate to the open limit. When
reaching the open limit the timer to close, if enabled, will be
disabled until another command is given. Activating this input
when the gate is closing will have no effect.

NOTE: If upon reversal a second separate obstruction is detected
(gate edge or RPM sensor), gate will stop and alarm.

Photo Eye Input: See Programming Section
This input will reverse a closing gate to the open limit. This input

will not affect the timer to close. Activating this input when the
gate is closing will have no effect.

Photo Eye Input: See Programming Section on page 17.
This input will reverse a closing gate to the open limit. This input

will not affect the timer to close. Activating this input when the
gate is closing will have no effect.

GL Controller Board

Obstruction While Opening

(Edge/Photo eye input)

5678910

Obstruction While Closing

(Edge/Photo eye input)

5678910

Transformer

Electrical
Box

Force Control

Max

Min

Edge Sensors

Edge Sensors

16

EDGE/PHOTO CLOSE

This switch (S2-4) selects edge or photo sensor for the gate
closing protection input.

Close Photo Eye (Reverse): When
the controller is configured for
photo eyes, the input functions to
reverse the gate to the open limit
when activated during the close
cycle.

Note: Timer to close will reset if
enabled.

Close Edge: When the controller is
configured for safety edges, the
input functions to reverse the gate
to the open limit when activated
during the close cycle. The
entrapment is not cleared at the
limit and the timer to close will be
disabled. The timer to close may be
enabled by activating the interrupt
loop, open or override open inputs.

UL325 ENTRAPMENT PROTECTION (CONTINUED)

CONTROL BOARD ILLUSTRATION

EDGE/PHOTO OPEN

This switch (S2-3) selects edge or photo
sensor for the gate opening protection
input.

Open Photo Eye (Pause): When the
controller is configured for photo eyes,
the input functions to pause the gate
during the opening cycle. Once the input
is cleared the gate continues to open.

Open Edge: When the controller is
configured for safety edges, the input
functions to reverse the gate to the close
limit when the edge is activated during
the opening cycle.

PHOTO CLOSE

ON

CLED PH

OPED PH

1 2 3 4

WARN

MAG

ON

S2

PHOTO OPEN

ON

CLED PH

OPED PH

1 2 3 4

WARN

MAG

ON

S2

EDGE OPEN

ON

CLED PH

OPED PH

1 2 3 4

WARN

MAG

ON

S2

ON

CLED PH

OPED PH

1 2 3 4

WARN

MAG

ON

S2

EDGE CLOSE

Connector (J2)

Connector SAMS (J5)

Connector
Main Terminal
Wiring (J1)

Connector
Master/Second (J4)

Dip Switch
Master/Second (S4)

Timer to Close

Force Adjustment

Dip Switch (S2)

Dip Switch (S1)

Diagnostic
LED

Limit LEDs

Relay Drive Troubleshooting LEDs (D6)

Terminal Troubleshooting LEDs (D11)

Motor Learn Button (S3)

17

SLIDE/SWING

This switch selects slide or swing gate operation, in order to
optimize gate behavior for specific application.

SL = Slide • SW = Swing

RIGHT/LEFT OPERATION

This switch selects the gate opening direction, to the left or to
the right. Right/Left operation is determined from the inside of
fence looking out.

“SAVE” SWITCH

This switch stores all settings into memory and locks out changes.

NOTE: For any programming changes to take effect this switch
must be in OFF position. When switch is ON, no settings can be
changed.

RIGHT HAND LEFT HAND

1 2 3 4

ON

SAVE

TTC

ON

S1

1 2 3 4

ON

SAVE

TTC

ON

S1

RT LT

SW SL

RT LT

SW SL

RT LT

SW SL

1 2 3 4

ON

SAVE

TTC

ON

S1

LOCKED UNLOCKED

1 2 3 4

ON

SAVE

TTC

ON

S1

RT LT

SW SL

APEMs

TIMER TO CLOSE

ENABLED

TIMER TO CLOSE

DISABLED

1 2 3 4

ON

SAVE

TTC

ON

S1

1 2 3 4

ON

SAVE

TTC

ON

S1

RT LT

SW SL

RT LT

SW SL

SWING GATE SLIDE GATE

1 2 3 4

ON

SAVE

TTC

ON

S1

1 2 3 4

ON

SAVE

TTC

ON

S1

RT LT

SW SL

RT LT

SW SL

PROGRAM SETTINGS (DIP SWITCH S1)

NOTE: For all S1, S2 and S4 switch settings to take effect, the Save Mode switch must be set to the off position.

PROGRAM SETTINGS (DIP SWITCH S2)

MAGLOCK ENABLE

This switch enables the Maglock feature. On an open command
there will be a half second delay after the maglock relay is
released before the motor starts.

WARNING ENABLE

This switch enables the gate “in motion” alarm feature. The
alarm will beep 3 seconds prior to movement and throughout
movement.

MAGLOCK ENABLED MAGLOCK DISABLED

ON

CLED PH

OPED PH

1 2 3 4

WARN

MAG

ON

S2

ON

CLED PH

OPED PH

1 2 3 4

WARN

MAG

ON

S2

WARNING ENABLED WARNING DISABLED

ON

CLED PH

OPED PH

1 2 3 4

WARN

MAG

ON

S2

ON

CLED PH

OPED PH

1 2 3 4

WARN

MAG

ON

S2

Max = 180 sec

Min = 0 sec

TIMER TO CLOSE

TIMER TO CLOSE ENABLE

This switch enables the auto close timer. The timer to close
feature works in conjunction with the potentiometer located on
the board.

18

3

6

9

#

2

5

8

0

1

7

CONTROL CONNECTION DIAGRAMS

NOTE: See wiring diagrams shipped with kit for additional
information. See owner’s manual for wiring distances and wire
gauge information.

WARNING: All controls that are to be used to operate the gate
system, must be installed where the user cannot come into
contact with the gate while operating the controls where the user
has full view of gate operation.

*We strongly recommend that you follow the UL guidelines
presented throughout the manual. Installation device
instructions: Always follow the instructions provided by the
manufacturer when installing and adjusting any control device. If
these instructions are contrary to the advice given here, call for
assistance.

SINGLE PHASE BOX

Accessory Terminal Block

24VAC Accessory
Power May Be
Found On These
Terminals

R1

R3

R2

24 VAC

Control Board

Accessory Terminal Block

12345678910

R4

11 1213 14 15 16 17 18 19 20

Override Open

Input (N.O)

Override Close

Control Input (N.O.)

OP

E

N

C

L
O

S

E

S

T

O
P

Stop/Reset

Control Input (N.C.)

Override Open

Control Input (N.O)

O

P

E

N

C
L

O

S

E

ST

O

P

O

PE

N

C

L
O

S

E

S

T

O
P

Shadow Loop

Input (N.O.)

F

R

E

Q

Radio (Single Button)

Input (N.O.)

Interrupt (Safety)
Loop Input (N.O)

F

R

E

Q

Obstruction While Opening

Edge/Photo Eye Input (N.O.)

Obstruction While Closing

Edge/Photo Eye Input (N.O.)

19

ACCESSORY WIRING

All inputs are normally open and momentary, except the stop
(N.C.). The following instructions are based upon UL325, and
include recommendations for significant increase in safety.

The GL operator employs 24VDC “High” control signalling.
Meaning the input is not common, but is 24VDC. Take
precautions when wiring any type of surge protection.

We strongly recommend that you follow the UL guidelines
presented throughout the manual. Refer to instructions shipped
with optional control devices for mounting, wiring, programming
and adjustment.

24VAC Accessory Power can be found at terminals R1 and R2
located on radio terminal block.

The LiftMaster Radio Receiver comes pre-wired to the Operator

• Remove the brass antenna from the accessory box and screw
it onto the “F”-connector provided on the side of the gate
operator.

NOTE: The radio receiver is wired in the factory for single button
control to open and close the gate.

REMOTELY MOUNTED STOP/RESET CONTROL WIRING

• This control will function as a Stop/Reset command and is to
be wired within line of sight of the gate.

• Wire Stop/Reset control station to terminals 3 and 5 on the
control box on the operator. Make sure that all Stop/Reset

controls are wired in series.

STOP/RESET AUXILIARY CONTROL WIRING
Terminals 6 & 5 (Com) - Open

These terminals are intended for use as a general open control.
Accessories that may be wired to this input include: Telephone
Entry Systems, Radio Receiver (Commercial Applications), Exit
Loop Detector, Keypads, 7-Day Timer. NOTE: Will not override a

double entrapment (signalled by the gate stopped and
entrapment alarm on).

123

12345

6

7

Control
Conduit

Stop/Reset
Button

Control
Conduit

Stop/Reset
Button

3

6

9

#

2

5

8

0

1

7

Connector

Antenna

Receiver

R1

4

3

2

1

R2

24VAC

R3

R4

R3

R2

R1

R4

Operator
Terminal

Relay Control

24VAC Power

R.
V

RC

RADIO

4
R

R3

R1 R2

Accessory Tray

12345678910

Radio (Signal Button) Input

11 12 13 14

20

ACCESSORY WIRING (CONTINUED)

STOP/RESET AUXILIARY CONTROL WIRING (CONTINUED)
Terminals 7 & 5 (Com) - Open Override Control Input

These terminals are intended for use only with the open control
of a three-button station that is installed within line of sight of the
gate. A momentary activation of this input will cause the gate to
open. Activation of this input for longer than three seconds will
enable the control to be used as a constant pressure override
device. This will allow the user, in emergencies, to override a
failed accessory such as a loop detector or photo-eye.

Terminals 4 & 5 (Com) - Close Override Control Input

These terminals are intended for use only with the close control
of a three-button station that is installed within line of sight of the
gate. A momentary activation of this input will cause the gate to
close. Activation of this input for longer than three seconds will
enable the control to be used as a constant pressure override
device. This will allow the user, in emergencies, to override a
failed accessory such as a loop detector or photo-eye.

Terminals 8 & 5 (Com) - Interrupt (Safety) Loop Input

These terminals are intended for use with a loop detector. This
input functions to reverse a closing gate to the open limit.
Latching this input will reset the timer to close.

Terminals 2 & 5 (Com) - Shadow Loop Input

These terminals are intended for use with a loop detector and is
primarily used on swing gate operators. This input protects cars
by preventing the gate from moving off of the open or close limit
when the shadow loop input is active.

The GL operator controller board senses commands using
+24VDC from terminal #3. Commands are seen when +24VDC are
applied to the controller’s input terminals. NOTE: The GL

controller has built in surge suppression circuitry however please
take precautions when adding any additional surge protection.

MASTER/SECOND SYSTEMS
Dual Gate Communications

The controller is capable of running the operator in a master or
second mode depending on (S4) switch setting.

Before initiating any command, the master unit queries for the
presence of a “second unit” for a time period of one second. If
the master gets no response the operator will operate in a stand
alone mode. NOTE: For single unit applications, a jumper must be

placed between 11 and 12 of the field wiring terminal block. In
this mode no further communications will take place during
travel. If the master detects the presence of a second unit, the
master will continue to query the second unit during travel. The
second unit will send a response to the master for every query.
The second operator will stop if there is a period of one second
or more of no communications.

When two operators are connected in dual gate configuration
accessories may be connected to either the master or second.

NOTE: Do not run Master/Second communication wiring in the
same conduit as the power and control wiring. The second unit
will require a normally close stop circuit for proper system
operation. After Master/Second wiring has been completed and
the S4 switch programmed, both units must have their power
cycled to initiate proper Master/Second communication. The
motor learn function must be completed in stand alone mode
prior to Master/Second wiring.

20

Open Override
Control Input

N.O.

Close Override
Control Input

N.O.

123456789

123456

123456

Com

Interrupt (Safety)
Loop Input

3456 7 8

345 78

Com

9

8

7

123456

Shadow Loop
Input

S4

Master or

Standalone

Gate Setting

Master

Unit

ON

Second

Unit

STREET

S4

Second

Second

Gate

Setting

Master

Unit

ON

Second

Unit

rupt

r

te

n

I

Loop

6'

e

nt

I

Loop

upt

r

r

COMPLEX

PARKING LOT

Ter minal
Block

11

12

minimum 18 gauge

Master

OR

Shielded

cable

(twisted pair)

Conduit

Ter minal
Block

12

11

Ground

21

SAMS OPERATION

1. When an authorized vehicle accesses the gate system, the
SAM system responds by first opening the gate farthest from
the vehicle, the swing or slide gate.

2. Once the swing or slide gate is open, the barrier gate begins
its open cycle.

3. Once the barrier is open the vehicle may pass through the
SAM system. At this point you have two options in how you
would like to initiate the SAM systems closure. You may
chose to:

a) Use a timer to close system to automatically close the

barrier gate after a preset amount of time or

b) Use a loop system to close the barrier gate after the vehicle

has passed through the SAM system.

4. Once the barrier gate is closed the slide or swing gate will
activate its internal timer to close and begin closing.

5. If another authorized vehicle accesses the SAM system before
the slide or swing begins to close the barrier will open and
allow the vehicle to pass through the SAM system.

6. If another authorized vehicle accesses the SAM system during
the slide or swing gates closing cycle the SAM system will
reopen the slide or swing gate. Once the slide or swing gate
reaches the open position the barrier will then open to allow
the vehicle to pass through the SAM system.

7. If no other authorized vehicles access the SAM system the
swing or slide gate will close followed by the barrier.

SEQUENCED ACCESS MANAGEMENT SYSTEM (SAMS)

The Sequenced Access Management System or SAMS allows the customer more control when managing vehicular entrances to areas
such as apartment complexes, businesses and gated communities. The basic concept of the system is that traffic is controlled by two
gates installed in tandem, a fast moving gate such as a barrier gate operator and a slower moving more secure or ornamental gate
such as a single or pair of slide/swing gate operator. The design of this gate system balances the demands of speed during high traffic
periods with security during low traffic periods. Barrier gates typically have the fastest open times of the many gate operator types and
the slide or swing gates allow you to effectively seal off the perimeter of the complex you are planning to secure.

NOTE: Connect all entry devices to the slide or swing gate. If using a device, such as a 7-day timer, to latch the slide or swing gate
open during high traffic times, connect the device’s N/O relay output to the GL board’s Interrupt Loop input. Once the device activates
the Interrupt Loop input, the next vehicle to access the SAMS system will lock the gate in the open position until the device deactivates.
When the device deactivates, the timer to close will automatically close and secure the gate.

SAMS WIRING

1. Install conduit between the BG770 and the SL575 for SAMS
control wiring.

2. Run a 4-conductor cable in the conduit between the BG770
SL575.

3. Locate the SAMS relay terminals (J5) on the GL board in the
SL575 and locate the auxiliary limit switch in the BG770.

4. Attach a wire from the SAMS relay terminal (J5) on the GL
board to terminal 1 on the BG770 terminal strip.

5. Attach a wire from the SAMS relay terminal (J5) on the GL
board to terminal 3 on the BG770 barrier gates terminal strip.

6. Attach a wire from terminal 5 of the SL575 accessory wiring
terminal block to the common (COM) on the auxiliary limit
switch in the barrier gate.

7. Attach a wire from terminal 8 of the SL575 accessory wiring
terminal block to the normally open (NO) on the auxiliary
limit switch.

8. Test for correct functionality of the SAM system.

TERMINAL BLOCK

INTERRUPT LOOP INPUT

TB5

TB8

SAMS RELAY AT J5

N/O

COM

BG770 BARRIER GATE

AUXILIARY LIMIT SWITCH

N/O

COM

TERMINAL STRIP

1 (OPEN)

3 (COMMON)

SAMS
Conduit

TRAFFIC

Hold Open

Loop

STREET

rrupt

e

Int

Loop

PARKING LOT

COMPLEX

OR

22

NOTES:

1. Severe or high cycle usage will require more frequent
maintenance checks.

2. Inspection and service should always be performed anytime a
malfunction is observed or suspected.

3. Limit switches may have to be reset after any major drive
chain adjustments.

4 If lubricating chain, use only a proper chain lube spray or a

lightweight motor oil. Never use grease or silicone spray.

Internal Speed Sensor Check for proper operation X
External Entrapment Check for proper operation X

Protection Systems
Gate Caution Signs Make sure they are present X
Clutch System Check and adjust if required XX
Brake System Check and adjust if required
Manual Disconnect Check and operate X
Drive Chain Check for excessive slack and lubricate X
Sprockets and Pulleys Check for excessive slack and lubricate X
Gate Inspect for wear or damage X
Accessories Check all for proper operation X
Electrical Inspect all wire connections X
Frame Bolts Check for tightness X
Total Unit Inspect for wear or damage X

DESCRIPTION TASK 3 MONTHS 6 MONTHS 12 MONTHS

COMPLETE CHECK OUT

CHECK AT LEAST ONCE EVERY

5. When servicing, please do some “house cleaning” of the
operator and the area around the operator. Pick up any debris
in the area. Clean the operator as needed.

6. It is suggested that while at the site voltage readings be taken
at the operator. Using a Digital Voltmeter, verify that the
incoming voltage to the operator it is within ten percent of the
operators rating.

IMPORTANT SAFETY INSTRUCTIONS

To reduce the risk of SEVERE INJURY or DEATH:

1. READ AND FOLLOW ALL INSTRUCTIONS.

2. NEVER let children operate or play with gate controls.
Keep the remote control away from children.

3. ALWAYS keep people and objects away from the gate.
NO ONE SHOULD CROSS THE PATH OF THE MOVING
GATE.

4. Test the gate operator monthly. The gate MUST reverse
on contact with a rigid object or stop when an object
activates the non-contact sensors. After adjusting the
force or the limit of travel, retest the gate operator.
Failure to adjust and retest the gate operator properly
can increase the risk of INJURY or DEATH.

5. Use the emergency release ONLY when the gate is not
moving.

6. KEEP GATES PROPERLY MAINTAINED. Read the
owner’s manual. Have a qualified service person make
repairs to gate hardware.

7. The entrance is for vehicles ONLY. Pedestrians MUST
use separate entrance.

8. Disconnect ALL power BEFORE performing ANY
maintenance.

9. ALL maintenance MUST be performed by a LiftMaster
professional.

10.

SAVE THESE INSTRUCTIONS.

OPERATION AND MAINTENANCE

WARNING

WARNING

23

FRICTION CLUTCH

1. Remove cotterpin from nut on the clutch shaft.

2. Back off clutch nut until there is very little tension on the
clutch spring.

3. Tighten clutch nut gradually until there is just enough tension
to permit the operator to move the gate smoothly but to allow
the clutch to slip if the gate is obstructed. When the clutch is
properly adjusted, it should generally be possible to stop the
gate during travel.

4. Reinstall Cotterpin.

This friction clutch system is not an automatic reversing device. It
only serves to minimize damage to the gate operator and gate,
and to help minimize vehicle damage. If you need an external
automatic obstruction sensing device, items such as gate edges
and photo beams are available to help protect pedestrians
(see page 4).

SOLENOID ACTUATED BRAKE

The brake is adjusted at the factory and should not need
additional adjustments for the the life of the friction pad.

Replace friction pads when necessary. Refer to the illustration for
identification of components for the solenoid type brake system.

GL BOARD PROGRAMMING AND FEATURES

MOTOR LEARN FUNCTION (FORCE PROFILE)

This function is preprogrammed at factory. If either board or
motor is replaced, the controller will need to be programmed to
“LEARN” the specific motor RPM profile of your operator. Switch
“S3” is provided for this. This is important for accurate force
control. Failure to do so may result in improper and unsafe
operation.

Note: Motor Learn must be performed in stand alone mode.

1. Detach the unit from the gate, the motor needs to be learned
without a load. (Do not use the manual release, the limit shaft
must be turning during learn sequence.)

2. Press the motor learn button. The yellow LED should start to
flash rapidly.

3. Push and hold down either the open or the close buttons. The
motor will run for a few seconds and then stop. If the LED
goes out the motor is learned. If the unit activates a limit
before completing the learn or some other error occurs the
LED will go back to on continuously. If this happens try
learning while running in the opposite direction.

4. Reconnect the unit to the gate, reset the limits and adjust the
force control.

To reduce the risk of SEVERE INJURY or DEATH:

• Disconnect power BEFORE performing ANY adjustments.

WARNING

WARNING

Clutch Pad

Clutch Plate

Friction Pads

Plate Assembly

Cotterpin

Adjusting Nut

Spring

Washer

Clutch Pulley

Solenoid

Release Lever

Motor
Learn
Button (S3)

24

LED Code Diagnostic Meaning Cleared By
Flashed

OFF Normal operation N/A

1 Single entrapment sensed Control Input

2 Double entrapment Hard Input*

3 Failed or no hall Removal of

effect sensor problem

4 Exceed maximum motor Hard Input*

run time

5 Limit fault Control Input

6 Loss of communications Removal of

between master and problem
second during run mode

On No Motor not learned Completion

Flash of Motor

Learn Routine

*Hard inputs include open override, close override and

stop inputs.

LED LED NAME DESCRIPTION

RELAY DRIVE TROUBLESHOOTING LEDS

There are 5 troubleshooting LEDs on relay drives K1 through K5. These LEDs will be illuminated when the microcontroller relay drive is
activated.

D6 Contactor A On when Contactor A is activated
D5 Contactor B On when Contactor B is activated
D4 SAM On when SAM relay is activated
D3 Lock On when Mag Lock relay is activated
D2 Alarm On when Alarm Relay is activated

TROUBLESHOOTING LEDS

There are 9 troubleshooting LEDs.

LED LED NAME DESCRIPTION

D11 Radio On when Radio switch is activated
D13 Shadow On when Shadow Loop is activated
D15 Hard Close On when Close switch is activated
D17 Stop On when Stop switch is not activated
D19 Soft Open On when Open switch is activated
D21 Hard Open On when Open switch is activated
D24 Interrupt Loop On when Interrupt/Safety Loop activated
D29 Obstruction Open On when Edge is activated or when Photo Eye

Beam is broken

D31 Obstruction Close On when Edge is activated or when Photo Eye

Beam is broken

FORCE CONTROL

Set the force control pot such that the unit will complete a full
cycle of gate travel but can be reversed off an obstruction without
applying an unreasonable amount of force. On most operators
this will be around the middle of the range.

NOTE: For LED location refer to illustration on previous page.

DIAGNOSTICS (LEDS AND CODES)

There are three diagnostic LEDs. Two red LEDs (OL, CL) are
indicators for the open and close limits. The LEDs are illuminated
when the limit switch contacts are closed.

The third amber LED (DIA) is used to blink out diagnostic codes.
The number is the count of the number of times the LED is on in
an 8 second period. The LED is on for approximately 1/2 second
and repeats every second until the number is reached. There will
be a pause following each pulse cycle (1-6 pulses) to differentiate
between the different diagnostic codes.

GL BOARD PROGRAMMING AND FEATURES (CONTINUED)

Force Control

Max

Min

25

OPERATOR FAILS TO RUN

CONTACTOR CHATTERS
WHEN OPERATOR BEGINS
TO MOVE

OPERATOR RUNS SLOW
AND/OR TRIPS THE
INTERNAL OVERLOAD

1) Improper wired stop control

2) Fault in the operator check the yellow

diagnostic LED at the top right of the
GL board next to the programming dip
switches

3) An accessory is active or
malfunctioning check the red input

status LEDs, D11-D31

4) Improper J4 connector wiring
(master/second)

5) Low or no high voltage power

6) Low or no low voltage power

7) No LEDs illuminated on GL board

TROUBLESHOOTING

➤ Check the green LED (D17) on GL board. If the green LED is off,

check to make sure a stop control has been installed across terminals
TB1-3 and TB1-5 of the Terminal Strip.

➤ If the yellow LED blinks six times, there is a master/second unit

communication failure. If operator is a single unit, make sure there is
a jumper across terminals TB1-11 and TB1-12. If operator is in a dual
gate configuration, make sure that the communication wiring between
the two units is undamaged and complete.

➤ If the yellow light is solid, the board needs to learn the motor. Follow

the directions on page 23.

➤ If any red LEDs are on, check the corresponding input. An installed

accessory may be wired incorrectly or malfunctioning. Remove the
accessory and test the operator.

➤ If the open or interrupt loop LED is on, make sure factory plug-in loop

detectors are working properly and appropriate loops are installed on
the loop input terminals.

➤ Stand-Alone Operators: Make sure there is a jumper installed across

the J4 connector.

➤ Master/Second Operation: Make sure that the master/second wiring is

installed correctly and is intact (not damaged).

➤ Measure the incoming voltage at the unit’s on/off switch. It should be

within 5% of the operator’s rating when running. Make sure that the
proper wire gauge was used for the distance between breaker and
operator by consulting the wiring specifications section on page 8 of
this manual.

➤ Measure the voltage at terminals R1 and R2 in the operator. This

voltage should be within 5% of 24VAC. If the high voltage power is
good and the low voltage power is bad, check to make sure the circuit
fuse is not tripped and that the correct primary tap is used on the
transformer. If fuse and tap are correct, replace the transformer.

➤ If both primary and secondary power is good, check to make sure

that the J2 connector is making good contact with the pins on the GL
board. If all is good, replace GL board.

1) Transformer’s secondary is overloaded

2) Low primary (high voltage) power

➤ Remove all accessory devices and test the operator. If the contactor

stops chattering, find an alternate power source for some of the
devices.

➤ Measure the incoming line voltage at the unit’s on/off switch. It

should be within 5% of the operator’s rating when running. Make sure
that the proper wire gauge was used for the distance between breaker
and operator by consulting the wiring specifications section on page 8
of this manual.

1) Low primary (high voltage) power

2) Problem in the motor

3) Problem in the contactor

4) Problem in the brake system

➤ Measure the incoming line voltage at the unit’s on/off switch as well

as the meter base or sub panel. Make sure there is not a major
change in voltage. The voltage at the operator should be within 5% of
the operator’s rating when running.

➤ Check the number of amps currently being drawn from the panel.

Make sure that the total power being drawn does not exceed the
panel’s rating.

➤ Make sure that the proper wire gauge was used for the distance

between breaker and operator by consulting the wiring specifications
section on page 8 of this manual.

➤ Perform a visual inspection of the motor. Examine the motor’s labels

for any distortion or signs of overheating. Replace the motor if it is
humming, grinding or making excessive noise. Note: Repeated motor

problems indicate poor primary power.

➤ Examine the contactor for sparking, smoke or burn marks. Remove

the wires from one side of the contactor, then measure the contact
points for high resistance (above 1 ohm). Relace the contactor.

➤ Make sure that the brake is disengaging when the contactor pulls in

and engaging when the contactor releases. Replace solenoid.

FAULT POSSIBLE CAUSE FIX

26

FAULT POSSIBLE CAUSE FIX

MASTER OR SECOND
OPERATOR IS NOT
FUNCTIONING PROPERLY

OPERATOR RUNS IN
WRONG DIRECTION

OPERATOR RUNS BUT
THEN STOPS AND
REVERSES DIRECTION

MOTOR RUNS BUT GATE
DOES NOT MOVE;
OPERATOR STOPS AND
ALARMS

OPERATOR OPENS
IMMEDIATELY UPON
POWER UP AND DOES NOT
CLOSE

OPERATOR HAS TROUBLE
LEARNING THE MOTOR

PROGRAMMING CHANGES
DO NOT EFFECT THE GATE

GATE EDGE PAUSES GATE
WHEN STRUCK DURING
OPENING

GATE DOES NOT ACTIVATE
TIMER TO CLOSE AFTER
THE CLOSE PHOTO EYE IS
BROKEN

1) Failure to cycle power after setup

2) Communication wiring may be
damaged or improperly wired for dual
gate operation

3) Master or second unit is not
programmed correctly

TROUBLESHOOTING

➤ The power to each unit must be cycled in order to initiate proper

master/second communication if the operators were previously in
stand-alone mode.

➤ Make sure that the communication wire that is used is twisted pair

and not run in the same conduit with any power wiring. Failure to do
so will result in interference across the master/second
communication line.

➤ Review program settings page 20 and check both the master and

second for proper programming.

1) Operator’s main power is out of phase
(three phases only)

➤ Turn off the unit’s main power at the breaker and swap any two

power leads at the operator’s main power switch. Apply power and
retest the operator. See important note on page 13.

1) Entrapment (force pot) incorrectly set

2) Gate is binding or not running
smoothly

3) Clutch is not adjusted properly

4) Brake is not functioning properly

5) Observe red LEDs D29 and D31

6) Hall Effect Sensor is not aligned

➤ This pot must be set so that the gate will run smoothly normally and

reverse when encountering an obstruction.

➤ Disengage the manual release and roll gate open and close by hand at

normal operating speed. Make sure that the gate runs smoothly and
does not bind. If the gate is hard to move or binds, repair the gate.

➤ Adjust the clutch so that the operator can move the gate throughout

its travel without slipping but will slip when the gate hits an
obstruction.

➤ Make sure that the brake operates correctly. The brake should

disengage when the contactor activates and engage when the
contactor releases.

➤ Both LEDs will indicate the activation of entrapment protection

devices on terminals TB1-9 and TB1-10 on the GL board. Remove the
devices and retest. If the operator now runs without fault, check
those accessories as well as their wiring.

➤ Make sure that the sensor is adjusted so that it is centered over the

limit shaft’s magnet and is 10-15 thousandths of and inch (business
card thickness) from the magnet.

➤ Replace the sensor if it is adjusted correctly but continues to fail.

1) Clutch is not adjusted properly

2) Operator’s manual release is not
aligned

➤ Adjust the clutch so that the operator can move the gate throughout

its travel without slipping but will slip when the gate hits an
obstruction.

➤ Make sure that the unit’s manual release is not engaged. The unit’s

manual release, when engaged, will set off the entrapment if the gate
is given a command to move.

1) Active or malfunctioning accessory

check the red input status LEDs,
D11-D13

➤ If any red LEDs are on, check the corresponding input. An installed

accessory may be wired incorrectly or malfunctioning. Remove the
accessory and test the operator.

➤ If the soft open or interrupt loop LED is on, make sure factory plug-in

loop detectors are working properly and appropriate loops are
installed on the loop input terminals.

1) Operator’s manual release is engaged ➤ Make sure the the unit’s manual release is not engaged. The unit’s

manual release, when engaged, will not allow the entrapment sensor
to provide feedback to the GL board when the operator is moving.

1) Check the save switch on switch S1-1 ➤ If the switch S1-1 is in the on position, any subsequent programming

changes will not affect the gate. To make programming changes,
switch S1-1 off, make desired changes, and then switch S1-1 on.

1) Open obstruction input is
programmed incorrectly

➤ The open obstruction input has been programmed to function with

photo eyes, not gate edges. Refer to page 16 and reprogram the
obstruction inputs for correct operation.

1) Close obstruction input is
programmed incorrectly

➤ The close obstruction input has been programmed to function with

gate edges, not photo eyes. Refer to page 16 and reprogram the
obstruction inputs to match the accessories that are installed on
operator.

2727

1 PHASE

POWER IN

ON/OFF
SWITCH

6

(W)

8

4

5

1

2

3

(BK)

(BK)

(BL/BK)

(BL/BK)

1

2

5

A

B

115V MOTOR

CONNECTION

GROUNDED DUPLEX

OUTLET (115V ONLY)

3

4

B

4

115V ONLY

A

A

B

2

1

6

115V ONLY

(SEE NOTE 2)

208/230V ONLY

O/L

3

5

GROUND

115V BRAKE

SOLENOID

(BK)

(GN)

(BK)

(BK)

(PU)

(BL)

(YE)

(GY)

(W)

MOTOR OVERLOAD

(SEE NOTE 3)

PRIMARY

L1

L2

8

4

5

1

2

3

(BK)

(BK)

(BL/BK)

(BL/BK)

208V/230V MOTOR

CONNECTION

230V BRAKE

SOLENOID

(PU)

(BL)

(YE)

(GY)

TO REVERSE MOTOR

DIRECTION INTERCHANGE

PURPLE & GRAY WIRES

INTERNAL MOTOR

WIRING
1 - BLUE
2 - WHITE
3 - ORANGE
4 - YELLOW
5 - BLACK
8 - RED
O/L - BROWN

24V Sec.

FUSE

3.15A

(TB 2)

AB CD

24VAC

RADIO
SIGNAL

RADIO BLOCK

FACTORY INSTALLED RADIO

R1

R2

R3
R4

(BL)

(BL)

(YE)

4

6

7

8

9

10

4

6

7

8

9

10

TB 1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

-

+

SAFETY ALARM

(100 db)

J4 PLUG

1
2

DUAL
GATE

J1-1

J1-2

J1-3

J1-4

J1-5

J1-6

J1-7

J1-8

J1-9

J1-10

J1-11

J1-12

J1-13

J1-14

J1-15

J1-16

J1 PLUG

STOP RESET

OPEN

CLOSE

FREE EXIT

LOOP HARNESS

10 PIN - 1,2,3,5

CAPPED

INTERRUPT

LOOP HARNESS

10 PIN - 1,2,3,5

CAPPED

J2 PLUG

J2-3
J2-4
J2-5
J2-6
J2-7
J2-1

J2-8

J2-9
J2-10
J2-11

J2-2

L/S B

NC

COM

NC

COM

L/S A

B

A

A1

A2

A1

A2

RPM

SENSOR

GL CONTROL BOARD

24VAC-IN

24VAC-COMMON

SOFT OPEN

NC

"B" LIMIT

CONTACTOR B

"A" LIMIT

CONTACTOR A

RPM - IN

RPM - SUPPLY

RPM GND

RADIO COMMAND

SHADOW

+24VDC

CLOSE

STOP

SOFT OPEN

HARD OPEN

INT. LOOP

OBS. OPEN

OBS. CLOSE

24 VAC-COMMON

DC-GND

LOCK 1

LOCK 1

ALARM 1

ALARM 1

RADIO

SHADOW

VDC COM

CLOSE

STOP

SOFT OPEN

HARD OPEN

INTERRUPT

OPEN

CLOSE

MASTER / SECOND

MAGLOCK

24 VAC

INTERRUPT LOOP

EXIT LOOP

FIELD CONNECTIONS

EDGE/PHOTOEYE

(W)

(W)

(YE)

(BK)

(Y/BK)

(RD)

(SEE NOTE 1)

NOTES:

1) Transformer primary voltage same as operator line voltage 24V secondary 60VA.

2) Wire color: 115V black, 208V red, 230V orange.

3) Single phase units are equipped with an external line break device and may be
equipped with an additional internal pilot duty thermal o/l device.

4) Outlet wiring: Black wire to brass screw, white wire to silver screw and green wire to green screw.

(BK)

(WH)

(RD)

(BK)

3

2

1

(GN)

(WH)

(RD)

(BK)

(BRN)

(GY)

(GN)

(WH)

(RD)

(BK)

(BRN)

(GY)

(BL)

(YE)

(GN)

(PU)

(OR)

(PU)

(PU/WH)

(Y/BK)

(GN)

(Y/BK)

(BRN)

(OR)

(GN)

(GY)

(OR/BK)

(BK)

(BK)

(BL)

(RD)

(WH)

(RD)

(WH)

(PU)

(P/W)

(Y/BK)

(GN)

(Y/BK)

(Y/BK)

(WH)

(BRN)

(OR)

(GN)

(GY)

(OR/BK)

(WH)

(RD)

(BK)

(BK)
(BL)

(YE)

(GY)

(BRN)

(GY)

(BRN)

(Y/BK)

(OR)

(Y/BK)

(GN)

(Y/BK)

(YE)

(YE)

(BL)

(BL)

(BRN)

(W)

(BK)

(BK)

(W)

(PU)

(OR)

(BK)

(BL)

(BL)

(BK)

(BK)

(YE)

(YE)

(YE)

(RD)

(RD)

= TERMINAL BLOCK IN LIMIT SWITCH ENCLOSURE (SL595 ONLY).

(GN)

(S)

(S)

(B)

(B)

(W)

(NOTE 4)

SINGLE PHASE WIRING DIAGRAM

2828

6

2

1

3

7

9

1

2

5

A

B

3

4

B

4

A

A

B

2

1

6

OVERLOAD

3

5

230V
BRAKE
SOLENOID

(BK)

(GN)

(BK)

(GY)

(PU)

(BK)

(YE)

(WH)

PRIMARY

L1

L2

230V
BRAKE
SOLENOID

(BK)

(BK)

(SEE NOTE 3)

(BK)

(BK)

(BK)

8

4

5

6

2

1

3

7

9

(GY)

(PU)

(BK)

(YE)

(BK)

8

4

5

6

230V CONNECTION

460V CONNECTION

575V
BRAKE
SOLENOID

2

1

3

(GY)

(PU)

(BK)

(YE)

(BK)

575V CONNECTION

(SEE NOTE 2)

24V Sec.

FUSE

3.15A

(TB 2)

AB CD

24VAC

RADIO

SIGNAL

RADIO BLOCK

R1

R2

R3
R4

(BL)

(BL)

(YE)

4

6

7

8

9

10

4

6

7

8

9

10

TB1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

­+

J4 PLUG

1
2

J1-1

J1-2

J1-3

J1-4

J1-5

J1-6

J1-7

J1-8

J1-9

J1-10

J1-11

J1-12

J1-13

J1-14

J1-15

J1-16

J1 PLUG

FREE EXIT

LOOP HARNESS

10 PIN - 1,2,3,5

CAPPED

INTERRUPT

LOOP HARNESS

10 PIN - 1,2,3,5

CAPPED

J2 PLUG

J2-3
J2-4
J2-5
J2-6
J2-7
J2-1

J2-8

J2-9
J2-10
J2-11

J2-2

L/S B

NC

COM

NC

COM

L/S A

B

A

A1

A2

A1

A2

(YE)

(BK)

(Y/BK)

(RD)

(SEE NOTE 1)

= TERMINAL BLOCK IN LIMIT SWITCH ENCLOSURE (SL595 ONLY).

(WH)

(RD)

(BK)

3

2

1

(GN)

(WH)

(RD)

(BK)

(BRN)

(GY)

(GN)

(WH)

(RD)

(BK)

(BRN)

(GY)

(BL)

(YE)

(GN)

(PU)

(OR)

(PU)

(PU/WH)

(Y/BK)

(GN)

(Y/BK)

(BRN)

(OR)

(GN)

(GY)

(OR/BK)

(BK)

(BK)

(BL)

(RD)

(WH)

(RD)

(WH)

(PU)

(P/W)

(Y/BK)

(GN)

(Y/BK)

(Y/BK)

(WH)

(BRN)

(OR)

(GN)

(GY)

(OR/BK)

(WH)

(RD)

(BK)

(BK)
(BL)

(YE)

(GY)

(BRN)

(GY)

(BRN)

(Y/BK)

(OR)

(Y/BK)

(GN)

(Y/BK)

(YE)

(YE)

(BL)

(BL)

(BRN)

(PU)

(OR)

(BL)

(BL)

(BK)

(BK)

(YE)

(YE)

(YE)

(RD)

(RD)

L3

(BK)

(BK)

FACTORY INSTALLED RADIO

40-32351B

3 PHASE

POWER IN

ON/OFF
SWITCH

GROUND

SAFETY ALARM

(100 db)

NOTES:

1) Transformer primary voltage same as operator line voltage 24V secondary 60VA.

2) Wire color: 208V red, 230V orange, 460V violet, 575V gray.

3) Three phase units are equipped with an internal pilot duty thermal overload
device or an external line monitoring device.

DUAL

GATE

GL CONTROL BOARD

24VAC-IN

24VAC-COMMON

SOFT OPEN

NC

"B" LIMIT

CONTACTOR B

"A" LIMIT

CONTACTOR A

RPM - IN

RPM - SUPPLY

RPM GND

RADIO COMMAND

SHADOW

+24VDC

CLOSE

STOP

SOFT OPEN

HARD OPEN

INT. LOOP

OBS. OPEN

OBS. CLOSE

24 VAC-COMMON

DC-GND

LOCK 1

LOCK 1

ALARM 1

ALARM 1

RADIO

SHADOW

VDC COM

CLOSE

STOP

SOFT OPEN

HARD OPEN

INTERRUPT

OPEN

CLOSE

MASTER / SECOND

MAGLOCK

24 VAC

INTERRUPT LOOP

EXIT LOOP

FIELD CONNECTIONS

EDGE/PHOTOEYE

STOP RESET

OPEN

CLOSE

RPM

SENSOR

MOTOR OVERLOAD
SEE NOTE 3

THREE PHASE WIRING DIAGRAM

29

ITEM PART # DESCRIPTION QTY

B1 07-10179 BRAKE HUB 1
B2 10-10187 BRAKE SOLENOID COVER 1
B3 10-10190 BRAKE RELEASE LEVER 1
B4 10-10191 BRAKE DISC 1
B5 11-10192 SPRING CUP FOR BRAKE ASSEMBLY 4
B6 11-10193 BRAKE STUD 4
B7 18-10194 SPRING, COMPRESSION X .875" LONG 4
B8 19-48001 CHAIN, #48 X 1 PITCH 1
B9 22-120 BRAKE SOLENOID, 115V 1

22-240 BRAKE SOLENOID, 230-460V 1
B10 31-10186 SPACER, .20" I.D. X .31" LONG 2
B11 75-10180 BRAKE MOUNTING PLATE ASSEMBLY 1
B12 75-10184 BRAKE PRESSURE PLATE ASSEMBLY 1
B13 80-9001 FEATHER KEY 1
B14 82-WX10-08T SCREW, #10-32 X 1/2" SERRATED 8
B15 86-CP04-112 COTTER PIN, 1/8" X 1-3/4" ZINC PLATE 1
B16 87-P-062 PUSH ON FASTENER 2

BRAKE KIT 115V (71-B120) & 230/460V (71-B240)

ITEM PART # DESCRIPTION QTY

1 K75-34842 COVER 1
2 10-30678 LOCKBAR 1
3 23-30716 STOP SW, SINGLE BUTTON 3BCS 1
4 15-19478 OUTPUT SPROCKET 1
5 K76-G0537-1 ALARM AND CABLE 1
6 K12-4164 BEARING FLANGE MOUNT 4
7 10-10874 CONNECTING BRACKET 2
8 10-15569 MOTOR PLATE 1

9 16-5L304 V BELT COGGED 30.4" 1
10 K75-19977 DISCONNECT LEVER ASSEMBLY 1
11 17-6014 MOTOR PULLEY 1
12 SEE PAGE 31 MOTOR KITS 1
13 SEE PAGE 31 ELECTRICAL BOX KITS 1

INDIVIDUAL PARTS

ITEM PART # DESCRIPTION QTY

O1 11-19485 OUPUT SHAFT 1
O2 15-19478 SPROCKET ASSEMBLY 1
O3 15-19480 DUAL SPROCKET 32/14 1
O4 15-48B18LGE SPROCKET 48B18 X 1" 1
O5 15-50B12LGH SPROCKET 50B12 X 1" BORE 1
O6 158A0056 E RING, 1" 1
O7 80-206-11 WASHER 1" ID X 1/16" TH 1
O8 80-207-19 KEY 1/4" X 1-1/2" LONG 2

O9 82-NH31-06 SET SCREW, 5/16"-18 3
O10 86-RP10-112 ROLL PIN, 5/15" X 1.75" 1
O11 80-206-12 SPACER 3

OUTPUT SHAFT ASSEMBLY KIT (K72-19974)

ITEM PART # DESCRIPTION QTY

C1 11-19470 CLUTCH SHAFT 1
C2 15-19480 DUAL SPROCKET 32/14 1
C3 15-19484 SPLINED CORE SPROCKET 1
C4 158A0056 E RING, 1" PLATED 4
C5 18-19487 COMPRESSION SPRING 1
C6 75-19985 PULLEY ASSEMBLY 1
C7 80-19473 WASHER, .048 THICK 1
C8 80-19474 THRUST BEARING, 1.02" ID 1

C9 80-19475 THRUST BEARING, 1.26" ID 1
C10 80-19476 RETAINING RING 1
C11 80-19846 DISCONNECT SPLINED HUB 1
C12 80-206-11 WASHER 1" ID X 1/16" THICK 5
C13 86-RP10-112 ROLL PIN, 5/16" X 1.75" 1

CLUTCH SHAFT ASSEMBLY KIT (K72-19975)

REPAIR PARTS

ITEM PART # DESCRIPTION QTY

10-10376 CHAIN GUARD 1
10-3510 CHAIN GUIDE 1
10-3515 GUIDE RETAINER 1

K1 • CHAIN GUARD ASSEMBLY KIT (K75-34824)

ITEM PART # DESCRIPTION QTY

12-4164 BEARING SELF ALIGNMENT 2
15-50B12LGH SPROCKET 50B12 X 1" BORE 1/4 1
11-30930 IDLER SHAFT 1

K2 • IDLER SHAFT ASSEMBLY KIT (K75-34828)

ITEM PART # DESCRIPTION QTY

19-48047M ROLLER CHAIN, #48X47 W/MASTER 4
K1C3196-3 ANTENNA 1
01-34851 OWNERS MANUAL 1
01-34851FR OWNERS MANUAL - FRENCH 1
01-34851SP OWNERS MANUAL - SPANISH 1

NOT SHOWN

3030

ILLUSTRATED PARTS

C12

C11

C10

C9

C13

6

O4

6

O8

O9

C8

C5

C4

C7

C12

C3

C2

12

11

7

C1

8

O2

O10

7

O3

O6

O7

O11

O1

6

6

9

C6

10

1

O5

O8

O9

B15

B2

B9

B15

K1

B11

4

K2

13

2

K1

B4

B1

B16

B11

B8

B10

B7

B3

B12

B5

B6

K1

5

ON/OFF SW
SEE VARIABLE
PARTS LIST

K2

3

4

8

8

10

5

6

1

5

2

31

3

7

9

PART P/N DESCRIPTION USED ON

MOTOR 20-1050B-2P 1PH 1/2HP BASE MOUNT 115/230V SL575-50-11, SL575-50-21, SL575-50-81

20-1100B-2P 1PH 1HP BASE MOUNT 115/230V SL575-100-11, SL575-100-21, SL575-100-81
20-3050B-4P 3PH 1/2HP BASE MOUNT 208/230/460V SL575-50-23, SL575-50-43, SL575-50-83
20-3050M-5 3PH 1/2HP C-FACE/BM 575V SL575-50-53
20-3100B-4P 3PH 1HP BASE MOUNT 208/230/460V SL575-100-23, SL575-100-43, SL575-100-83
20-3100M-5 3PH 1HP BASE MOUNT 575V SL575-100-53

SOLENOID 22-120 115V ALL 115-1PH

22-240 230V ALL 230 1PH & 3PH, 460-3PH
22-575 575V 575V 3PH

SWITCH 23-20088 ON/OFF SWITCH 1PH ALL 115-1PH

23-3005 ON/OFF SWITCH 3PH ALL 3PH
23-3001 ON/OFF SWITCH 1PH 208/230 1PH

OVERLOAD 25-2006 6 AMP SL575-50-21, SL575-50-81

25-2008 8 AMP SL575-75-21, SL575-75-81,SL575-100-21,SL575-100-81
25-2010 10 AMP SL575-50-11
25-4002-SK 1.8 TO 2.6 AMP SL575-100-53

VARIABLE PARTS LIST

ELECTRICAL BOX

ITEM PART # DESCRIPTION QTY

1 K001A5566-3 LOGIC BOARD KIT 1

N/S K74-18379 HALL EFFECT KIT (NOT SHOWN) 1

2 OVERLOAD SEE VARIABLE PARTS LIST 1
3 312HM RADIO 1
4 K72-34818 LIMIT SHAFT KIT 1
5 13-10024 LIMIT NUT 1
6 23-10041-1 LIMIT SWITCH 2
7 03-8024-K CONTACTOR 1
8 23-34815 OPEN/CLOSE SWITCH 2
9 21-3260-1 TRANSFORMER 1

10 23-30716 STOP SWITCH 1

CONTROL BOX ASSEMBLY (K75-18620)

Refer to the parts list below for replacement parts available for your operator. If optional modifications and/or accessories are included with your
operator certain components may be added or removed from these lists. Please consult a parts and service representative regarding availability of
individual components.

Complete Electrical Box Replacement Kits:

To order a complete electrical box replacement kit add a “K” prefix to the model number of your operator.
For Example: SL-575-50-11 (Operator) = K-SL5755011 (Electrical Box)

HOW TO ORDER REPAIR PARTS

OUR LARGE SERVICE ORGANIZATION

SPANS AMERICA

INSTALLATION AND SERVICE INFORMATION

ARE AVAILABLE 6 DAYS A WEEK

CALL OUR TOLL FREE NUMBER

1-800-528-2806

HOURS 6:00 a.m. TO 7:00 p.m. (Central Std. Time)

MONDAY Through FRIDAY

HOURS 8:00 a.m. TO 6:00 p.m. (Central Std. Time)

SATURDAY

www.liftmaster.com

WHEN ORDERING REPAIR PARTS

PLEASE SUPPLY THE FOLLOWING INFORMATION:

PART NUMBER DESCRIPTION MODEL NUMBER

ADDRESS ORDER TO:

THE CHAMBERLAIN GROUP, INC.

Tucson Support Group

6020 Country Club Road

Tucson, AZ 85706

© 2005, The Chamberlain Group, Inc.

01-34851C All Rights Reserved Printed in Mexico

LIFTMASTER®TWO YEAR LIMITED WARRANTY

The Chamberlain Group, Inc. warrants to the first retail purchaser of this product, for the structure in which this product is originally
installed, that it is free from defect in materials and/or workmanship for a period of two years from the date of purchase. The proper
operation of this product is dependent on your compliance with the instructions regarding installation, operation, maintenance and
testing. Failure to comply strictly with those instructions will void this limited warranty in its entirety.

If, during the limited warranty period, this product appears to contain a defect covered by this limited warranty, call 1-800-528-2806,
toll free, before dismantling this product. Then send this product, pre-paid and insured, to our service center for warranty repair. You
will be advised of shipping instructions when you call. Please include a brief description of the problem and a dated proof-of-purchase
receipt with any product returned for warranty repair. Products returned to Seller for warranty repair, which upon receipt by Seller are
confirmed to be defective and covered by this limited warranty, will be repaired or replaced (at Seller’s sole option) at no cost to you
and returned pre-paid. Defective parts will be repaired or replaced with new or factory-rebuilt parts at Seller’s sole option.

ALL IMPLIED WARRANTIES FOR THE PRODUCT, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE TWO YEAR LIMITED
WARRANTY PERIOD SET FORTH ABOVE, AND NO IMPLIED WARRANTIES WILL EXIST OR APPLY AFTER SUCH PERIOD. Some
States do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. THIS LIMITED
WARRANTY DOES NOT COVER NON-DEFECT DAMAGE, DAMAGE CAUSED BY IMPROPER INSTALLATION, OPERATION OR CARE
(INCLUDING, BUT NOT LIMITED TO ABUSE, MISUSE, FAILURE TO PROVIDE REASONABLE AND NECESSARY MAINTENANCE,
UNAUTHORIZED REPAIRS OR ANY ALTERATIONS TO THIS PRODUCT), LABOR CHARGES FOR REINSTALLING A REPAIRED OR
REPLACED UNIT, OR REPLACEMENT OF BATTERIES.

THIS LIMITED WARRANTY DOES NOT COVER ANY PROBLEMS WITH, OR RELATING TO, THE GARAGE DOOR OR GARAGE DOOR
HARDWARE, INCLUDING BUT NOT LIMITED TO THE DOOR SPRINGS, DOOR ROLLERS, DOOR ALIGNMENT OR HINGES. THIS
LIMITED WARRANTY ALSO DOES NOT COVER ANY PROBLEMS CAUSED BY INTERFERENCE. ANY SERVICE CALL THAT
DETERMINES THE PROBLEM HAS BEEN CAUSED BY ANY OF THESE ITEMS COULD RESULT IN A FEE TO YOU.

UNDER NO CIRCUMSTANCES SHALL SELLER BE LIABLE FOR CONSEQUENTIAL, INCIDENTAL OR SPECIAL DAMAGES ARISING IN
CONNECTION WITH USE, OR INABILITY TO USE, THIS PRODUCT. IN NO EVENT SHALL SELLER’S LIABILITY FOR BREACH OF
WARRANTY, BREACH OF CONTRACT, NEGLIGENCE OR STRICT LIABILITY EXCEED THE COST OF THE PRODUCT COVERED HEREBY.
NO PERSON IS AUTHORIZED TO ASSUME FOR US ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OF THIS PRODUCT.

Some States do not allow the exclusion or limitation of consequential, incidental or special damages, so the above limitation or
exclusion may not apply to you. This limited warranty gives you specific legal rights, and you may also have other rights which vary
from state to state.

WARRANTY POLICY AND SERVICE