Lift-master CPS-04-01 User Manual

1

Protector System

®

OWNER’S MANUAL

Models: CPS-N4, CPS3-N4 and CPS-LN4

Application

CPS-N4: Suitable for use on all operators with a reversing

N.O. contact input.

CPS-LN4: Direct connect photo eyes suitable with Logic 2 and

Logic 3 operators.

CPS-N4: Suitable for use with Logic 2 and Logic 3 operators

when more than (1) set of photo eyes are required.
Example: Fire station, use (1) set of direct connect
CPS-LN4 and CPS-N4.

Install the Protector System

®

IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING
SENSOR

Be sure power to the operator is disconnected.

When properly connected and aligned, the sensor will detect an
obstacle in the path of its electronic beam. The sending eye
(emitter with an amber indicator light) transmits an invisible
light beam to the receiving eye (receiver with a green indicator
light). If an obstruction breaks the light beam while the door is
closing, the door will stop and reverse to full open position.

The units must be installed inside the garage so that the
sending (emitting) and receiving eyes face each other across the
door, no more than 6" (15 cm) above the floor. Either can be
installed on the left or right of the door as long as the sun never
shines directly into the receiving eye lens.

The brackets must be securely fastened to a solid surface such
as the wall framing. If installing in masonry construction, add a
piece of wood at each location to avoid drilling extra holes in
masonry if repositioning is necessary.

The invisible light beam path must be unobstructed. No part of
the garage door (or door tracks, springs, hinges, rollers or other
hardware) may interrupt the beam while the door is closing. If it
does, use a piece of wood to build out each sensor mounting
location to the minimum depth required for light beam
clearance.

—

Facing the door from inside the garage (installation procedures are the same for all door types).

Part # Description

41K4629 CPS-N4 - Commercial Protector Interface

CPS3CARD CPS3 PC Board (Only)

K77-16011 Sensor Hardware Kit

50-15514 Emitter

50-15515 Receiver

To reduce the risk of SERIOUS INJURY or DEATH,

• This device is for use ONLY on LiftMaster®Commercial
Door Operators.

• Disconnect power BEFORE installing the Commercial
Protector System®.

• Read and follow ALL instructions.

WARNING

WARNING

—Left Side of Garage—

Safety Reversing
Sensor

Invisible Light
Beam Protection
Area

— Right Side of Garage

Safety Reversing
Sensor

2

Figure 4

INSTALLING THE BRACKETS

Be sure power to the operator is disconnected. Install and align
the brackets so the sensors will face each other across the
door/gate, with the beam no higher than 6" (15 cm) above the
floor. For sensing above 6" a second set of eyes would be
required.

Floor or Wall Mount Installation (Figure 1)

If necessary, see Figure 2 for various assembly options to fit
your application. Always use flat washer next to slot with radius
as shown in Figure 3. Insert track bolts through holes as shown.

NOTE: Putting track bolts in slots will prevent brackets from
pivoting. Attach brackets to wall with lag screws provided.

Fasten to the floor with concrete anchors (not provided).

Track Installation (Figure 3)

To mount to door track use only one bracket per side.
To vertically attach to 2" x 4" wall stud it may become necessary

to rotate bracket to prevent wood from splitting.

Figure 1

Floor or Wall Mounting

See Wiring
Connections

Sensor Beam
6" (15 cm) max. above floor

Sensor Beam
6" (15 cm) max. above floor

Invisible Light Beam
Protection Area

Liquid Tight
Conduit

Liquid Tight
Junction Box

Liquid Tight
Junction Box

Door Track Mounting

Figure 2

CONDUIT CONNECTIONS

Use a liquid tight fitting (1/2" trade size) with
sealing washer to connect to sensors. The
sensors are supplied with 36" long leads. We
recommend the use of a liquid tight junction
box near each sensor to make the connection to
the sensor leads (Figure 4). Use rigid or flexible
liquid tight conduit (depending on local codes)
from junction boxes to operator.

IMPORTANT: Use a minimum size 20 ga. copper
wire for connection between the sensors and
the operator.

WIRING CONNECTIONS:

CPS-N4 - See page 3
CPS3-N4 - See page 4
CPS-LN4 - See page 5

Figure 3

Assembly Variations

INSTALLATION FOR LIFTMASTER COMMERCIAL OPERATORS

Assemble to either side

Flip one bracket and
assemble to either side

1/4"-20 x 5/8"
Track Bolts

1/4" Drill
Holes

Hex Mounting Nut
for Sensor

Door

1/4" Flat Washer
1/4" Lock Washer
1/4"-20 Hex Nut

1/4" Flat Washer
1/4" Lock Washer
1/4"-20 Hex Nut

Lock Washer for Sensor

1/4"-20 x 5/8"
Track Bolts

1/4" x 1-1/2"
Lag Screws

1/4" Lock Washer
1/4"-20 Hex Nut

1/2" Hole Spacing

2" Hole Spacing

1/4"-20 x 5/8" Track Bolts

3

CPS3-N4 Wiring Connections for use with Logic Operators (L2 or L3)

Commercial Door Opener Protector System®Only

Commercial Door Opener Protector System®and 2-Wire Fail Safe Door Edge

WIRING FOR LIFTMASTER COMMERCIAL OPERATORS

CPS3 protector and 2-wire fail-safe door edge connections

For a 2-wire safety edge with an embedded resistor;

1. Remove the 270K resistor from the A & B terminals.

2. Connect 2-wire coil cord or cord reel to the A & B terminals.
For a 4-wire safety edge using a 2-wire coil cord;

1. Remove the 270K resistor from the A & B terminals.

2. Add the resistor to 2 of the 4 wires at the safety edge,
connect the coil cord to the other 2 safety edge wires
(Figure 1).

3. Connect the 2-wire coil cord or cord reel to the A & B
terminals.

NOTE: If the LiftMaster®photo eyes are not being connected
you must remove the JU1 and R16 resistors from the
CPS3CARD.

Insert Logic Board into
any available slot

I

270KΩ Resistor

Brown

Blue

A
B
C
D

E
F
G
H

J

2-Wire Edge

JU1
R16

A
B
C
D

Brown

E
F
G
H

I

J

Blue

CPS3
Option Logic Board

Logic 3 Board Shown

Figure 1

Terminal A

Terminal B

270K
Resistor

2-Wire s.e. with Embedded Resistor

or

4-Wire s.e. Adding the Resistor

4

NOTE: When using a 4-wire door edge only (without the LiftMaster®photo eyes), you must remove the JU1 and R16 resistors from the
CPS3 card. Logic 3 Board will have the same connection. The maximum door edge resistance should be less than 1000 ohms as
measured between any 4 conductors. This measurement should be taken when the door edge is in the closed contact state.

Commercial Door Opener Protector System

®

and 4-Wire Fail Safe Door Edge

A
B
C

D

E
F
G
H

I

J

270KΩ Resistor

Brown

Blue

4-Wire Edge

Door Edge Contacts

JU1
R16

*NOTES: Typical connections shown. On mechanical operators always refer to diagram that came with the operator.

For gate operator controls not listed above, refer to their respective owner’s manuals.

Operator/Auxiliary Point

Connections

Connection at CPS CPS-N4 Interface Box

24V Common

Sensor Black

or Brown

Sensor White

or Blue

Sensing Edge

Input (1/2)

Sensing Edge

Input (2/2)

Diagram

Reference

Page

Emitter Wire

at CPS

CPS-N4

Emitter Black

or Brown

Emitter White

or Blue

Receiver Wire

at CPS

CPS-N4

Receiver Black

or Brown

Receiver

White or Blue

Mechanical

Terminal

at Operator 3* Wire Nut* 3* 10* 7

Logic 2

Terminal

at Operator 12 13 8 11 5

Logic 3

Terminal

at Operator 13 14 8 11 5

HCT Terminal

OmniControl

Surge

Suppressor

Terminals

13 11 3 4 7

Elite Gate

Application 1

OmniBoard

Terminals

Sensor (1/2) Sensor (1/2)

7

OmniControl

Surge

Suppressor

Terminals

13 11

Elite Gate

Application 2

OmniControl

Surge

Suppressor

Terminals

13 11 3 4 7

Estate Series
with X3 or B3
Control Board

at Operator

TB7 1/2

Available

TB7 2/2

Available

TB3 1/3

See page 5

for inside vs

outside

photoeye

TB3 2/3

See page 5

for inside vs

outside

photoeye

5

Operators

with GL

Control Board

at Operator

External

Radio
Terminal
Strip R1

External

Radio

Terminal

Strip R2

GL Board

Terminal 5

GL Board

Terminal 9 or

10 See page 6

for inside vs

outside

photoeye

6

5

CPS-N4 Wiring Connections for use with Estate
Series X3 or B3 Control Board

WIRING FOR LIFTMASTER GATE OPERATORS

The eyes are required for all timer modes and fail-safe modes.
The eyes are automatically learned once connected and
operating correctly.

To Unlearn Eyes

• For Logic 3, remove the eyes from the circuit. Set the selector
switch to “DIAG” mode, then press and hold the stop button
for 5 seconds until the “MAS” LED blinks. the eyes LED
should be off. Set the selector switch back to the
desired mode.

• For Logic 2, remove the eyes from the circuit board. Turn dip
switches 1 and 2 off, and 3 and 4 on. Then, push the open
button twice, the close button twice, and the stop button
twice. Return dip switches back to desired mode.

CPS-N4 Wiring Connections

CPS-LN4 Wiring Connections for use with
Logic Operators [L2 or L3]

WIRING FOR LIFTMASTER COMMERCIAL OPERATORS

24Vac/Vdc
Power Supply

To Sending Eye
(Emitter) and
Receiving Eye
(Receiver)

Commercial Protector Interface

24V

Common

Sensor
Brown

Sensor
Blue

Commercial Door Operator N.O.
Sensing Edge Input

Brown Blue

1

543

2

Connections shown good for

Logic 2 or Logic 3

131211

109876

14

NOTE: Depending on where you will
place the photo eye, you can use the
inside photo or the outside photo.

24V

Common

Emitter

Receiver

Sensor
Brown

Sensor
Blue

Inside Photo

TB3

Outside Photo

TB7

Smart Gate
X3/B3 Board

24Vac Output

6

CPS-N4 Wiring Connections for use with Elite

®

Omni Control Board Operators

Application 1

Wiring the Protector Interface to the Sensor Alarm causes
operator to reverse only a few inches before stopping.

WIRING FOR LIFTMASTER COMMERCIAL OPERATORS

ALARM SENSOR

OR

CPS-N4 Wiring Connections for use with GL
Control Board

24V

Common

Sensor
Brown

Sensor
Blue

NOTE: Depending on where you will
place the photo eye, you can use the
input 9 for safety open or the input
10 for safety close.

Emitter

Receiver

FETY EXIT

ALARM SENSOR

DC-BACKUP

CK ALARM

M/S LINK

ARMED

SYSTEM ON

SENSORS

1 3

ALARM

SENSOR

COMMAND

DEPT.

PROCESSED

FIRE

EXIT
LOOP

1 3

STRIKE

SAFETY

REVERSE

OPEN

LOOP

SENSOR

TIMER

OFF

OPEN LEFT

RADIO

RECEIVER

CENTER

LOOP

60

ON

OPEN RIGHT

1 3

GATE

LOCKED

RESET

MOTOR

POWER

3

OVERLOAD

MADE IN USA

OPEN

STOP CLOSE

GG BB

M

/S LinkM/S Link

24V

Common

Sensor
Brown

Sensor
Blue

®

OmniControl Sur

Center

Center

AA

Patent PendingPatent Pending

++

––

Strike

Strike

O

O

pe

pe

n

n

R

R

ad

ad

io

Pu

Pu

s

s

h

h

Bu

Bu

P/N Q410

Fire Dept

Fire Dept

Strike Open

Strike Open
Push Button

Push Button

Patent Pending

Patent Pending

P/N Q410

++

––

Radio

Radio

Receiver

Receiver

ge Suppressor

Safety

Safety

Exit

Exit

Loop

Loop

Loop

Loop

Loop

Loop

Key Switch

Key Switch

io

tt

tt

on

on

R

R

ec

ec

eiver

eiver

Class 2

Class 2
Supply

Supply

2

2

4

4

V

V

o

o

lts

lts

D

D

C

C

13

11

Emitter

Receiver

7

Testing the Protector System

®

Test the Commercial Protector System

®

• Press the OPEN button to fully open the door.

• Press the CLOSE button to close the door.

• Obstruct the light beam while the door is closing. The door

should stop and reverse.

The operator will not close if the indicator light in either
sensor is not glowing steadily, alerting you to the fact that the
sensor is misaligned or obstructed.

NOTE: For non-solid state operators, if the door is stopped in a
mid position, activation of the sensors will cause the door to
open. This is similar to activating a sensor edge.

TROUBLESHOOTING

1. If the sending eye and receiving eye indicator lights do not
glow steadily after installation, check for:

• Electric power to the opener.

• A short in the Blue or Brown wires.

• Incorrect wiring between sensors and interface.

• An open wire (wire break).

2. If receiving eye indicator light is off (and the invisible light
beam path is not obstructed), check for alignment of the eyes
and/or an open wire to the receiving eye.

To reduce the risk of SERIOUS INJURY or DEATH, the
Commercial Protector System®must be properly installed
and working.

WARNING

WARNING

FKeF

Ke

C

enter

Lo

o

p

C

enter

Lo

o

p

S

a

f

et

y

Loop

S

a

f

et

y

Loop

Exit
Lo

o

p

Exit
Lo

o

p

OmniControl Surge S

Application 2

If an obstruction breaks the light beam while the door is closing,
the door will stop and reverse to full open position.

CPS-LN4 Only

3. If the sending eye and receiving eye indicator lights are both
lit, but interrupting the photo eyes does not cause the door to
reverse when closing, check both eyes and make sure one
eye is the sending and the other is a receiving eye.

NOTES:

1. Direct sunlight to the sending eye may cause operator from
closing even when both the sending and receiving indicator
lights are illuminated. A protective cover shielding both eyes
from direct sunlight will resolve this issue.

2. Professional service is required if the operator closes the
door when the photo eyes are obstructed.

Strike

Strike
Pu

Pu

Patent Pen

Patent Pen

ding

ding

++

––

O

O

pe

pe

n

n

R

R

ad

ad

io

s

s

h

Bu

h

Bu

io

tton

tton

R

R

ec

ec

eiver

eiver

24V

Common

Sensor
Brown

Sensor
Blue

GG BB

M

/S LinkM/S Link

®

OmniControl Sur

Center

Center

AA

Loop

Loop

Safety

Safety

Loop

Loop

ge Suppressor

Exit

Exit

Loop

Loop

Key Switch

Key Switch

Fire Dept

Fire Dept

Strike Open

Strike Open
Push Button

Push Button

P/N Q410

P/N Q410

Patent Pending

Patent Pending

––

++

Radio

Radio

Receiver

Receiver

Class 2

Class 2
Supply

Supply

24

24

V

V

o

o

lts D

lts D

C

C

3

4

13

11

Emitter

Receiver

© 2006, The Chamberlain Group, Inc.

01-32274B All Rights Reserved

HOW TO ORDER REPAIR PARTS

OUR LARGE SERVICE ORGANIZATION

SPANS AMERICA

INSTALLATION AND SERVICE INFORMATION

SIMPLY DIAL OUR TOLL FREE NUMBER:

1-800-528-2806

www.liftmaster.com

WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE
FOLLOWING INFORMATION:

• PART NUMBER

• PART NAME

• MODEL NUMBER

ADDRESS ORDERS TO:

THE CHAMBERLAIN GROUP, INC.

Technical Support Group

6020 S. Country Club Road

Tucson, Arizona 85706