Chamberlain Series 1200 User Manual

1/4x1-1/2"

Lag Screw

#10-32x3/8"

Screw

1/4"-20

Lock Nut

#10x32

Lock Nut

Staples

1/4"-20x1/2"

Carriage Bolts

Mounting Bracket

With Square Holes

#10-32x3/8"

Screws

"C" Wrap

#10-32

Lock Nuts

Mounting Bracket

with Slot

1/4"-20

Lock Nuts

1/4x1-1/2"

Lag Screws

1/4-20x1/2" Carriage Bolts

(with square shoulder)

Inside

Garage

Wall

"C" Wrap

Mounting Bracket

with Square Holes

Inside

Garage

Wall

"C" Wrap

Mounting Bracket

with Square Holes

1/4"-20x1/2"

Carriage Bolts

1/4"-20 Lock Nuts

Drill 3/8"

Holes

Garage

Door Track

Figures 2, 3 and 4 show recommended assembly of
bracket(s) and "C" wrap based on the 

wall

installation of the sensors on each side of the
garage door as shown on page 17, or on the 
garage door tracks themselves. 

• Fasten the "C" wraps to the mounting brackets

having square holes, using the hardware shown in
Figure 2.

• Discard slotted bracket. Drill 3/8" holes in each

track and fasten securely with hardware as shown
in Figure 3.

• Connect each assembly to a slotted bracket, using

the hardware shown in Figure 4. Note alignment
of brackets for left and right sides of the door.

• Finger tighten the lock nuts.

• Use bracket mounting holes as a template to

locate and drill (2) 3/16" diameter pilot holes on
both sides of the garage door, 4"-6" above the
floor (but not exceeding 6"). (See warning on 
page 17.)

• Attach bracket assemblies with  

1/4"x1-1/2" lag screws as shown in Figure 4.

• Adjust right and left side bracket assemblies to the

same distance out from mounting surface. Make
sure all door hardware obstructions are cleared.
Tighten the nuts securely.

18

"C" Wrap

Inside

Garage

Wall

Mounting Bracket

with Square Holes

Garage

Floor

Mounting Bracket

with Slot

Sensor

with wire

Indicator Light

Indicator Light

Inside

Garage

Wall

Mounting Bracket

with Slot

Attach with

concrete anchors

(not provided)

Mounting Bracket

with Square Holes

"C" Wrap

Sensor with wire

Garage

Floor

Figures 5 and 6 are variations which may fit your installation requirements better. Make sure the wraps and
brackets are aligned so the sensors will face each other across the garage door.