BuildMark 1345BMM, Owner'S Manual

18

Invisible Light Beam
Protection Area

Safety Reversing Sensor

Safety Reversing Sensor

Connect Wire to
Opener Terminal Screws

Bell Wire

Finished Ceiling

OPENER TERMINAL SCREWS

Sensor
Connections

Door Control

Connections

(dotted line)

1 

2 

3 

Bell Wire

MOUNTING AND WIRING THE SAFETY SENSORS

•  Slide a 1/4"-20x1/2" carriage bolt head into the slot on each 

sensor. Use wing nuts to fasten sensors to brackets, with 
lenses pointing toward each other across the door. Be sure the 
lens is not obstructed by a bracket extension (Figure 5).

•  Finger tighten the wing nuts. 

• 

Run the wires from both sensors to the opener. Use insulated 
staples to secure wire to wall and ceiling. 

•  Strip 1/4" (6 mm) of insulation from each set of wires. 

Separate white and white/black wires sufficiently to connect to 
the opener terminal screws: white to 2 and white/black to 3 
(Figure 6).

ALIGNING THE SAFETY SENSORS

• 

Plug in the opener. The indicator lights in both the 

sending

 and 

receiving eyes

 will 

glow steadily

 if wiring connections and 

alignment are correct.

The 

sending eye

 amber indicator light will glow regardless of 

alignment or obstruction. If the green indicator light in the 

receiving eye

 is

off, dim, or flickering (and the invisible light beam 

path is not

obstructed), alignment is required.

• Loosen the 

sending eye

 wing nut and readjust, aiming directly 

at the 

receiving eye

.

 Lock in place.

• Loosen the 

receiving eye

 wing nut and adjust sensor until it 

receives the sender’s beam. When the green indicator light 

glows steadily

, tighten the wing nut.

TROUBLESHOOTING THE SAFETY SENSORS

1. If the 

sending eye

 indicator light does not 

glow steadily

 after 

installation, check for:

•  Electric power to the opener.

•  A short in the white or white/black wires. These can occur at 

staples, or at opener connections.

•  Incorrect wiring between sensors and opener.

•  A broken wire.

2. If the 

sending eye

 indicator light 

glows steadily

 but the 

receiving eye

 indicator light doesn’t:

• Check alignment.

•  Check for an open wire to the 

receiving

eye

.

3. If the 

receiving eye

 indicator light is dim, realign either sensor.

NOTE: 

When the invisible beam path is obstructed or misaligned 

while the door is closing, the door will reverse. If the door is 
already open, it will not close. The opener lights will blink 10 
times. See page 16.

Carriage Bolt 
1/4"-20x1/2"

Lens

Wing Nut
1/4"-20

Figure 5

Figure 6