Chamberlain Power Drive PD505D Owner's Manual page 17

MOUNTING 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.
Recommended Wire Routing
1. Using insulated staples, run the wires from both sensors
to the rail at the door header (Figure 5A).
2. Run the wires through wire clips at the top of the rails.
NOTE: If your access door is near the garage door, you
may choose to install the door control at this time and run
the door control wire along the rail with the sensor wires.
3. Separate the white and white/black wires. Strip 7/16"
(11 mm) of insulation from the end of the sensor wires.
Twist like colored wires together. Connect the bell wire
from safety reversing sensors to the quick-connect
terminals: white wires to the white terminal and white/
black wires to grey terminal (Figure 5B).
Figure 5A
Sensor Wire
Wire Clips
SAFETY REVERSING
Figure 5B
SENSORS CONNECTIONS
Quick-Connect
Terminals
Left Side Panel
Strip wire 7/16"
7/16" (11 mm)
White Wire
To release
or insert
wire, push
in tab with
screwdriver tip
Rail
White/Black
Wire
Grey
White
Antenna
Carriage Bolt
1/4"-20x1/2"
Bell Wire
Safety Reversing Sensor
Invisible Light Beam
Protection Area
17
HARDWARE SHOWN ACTUAL SIZE
Wing Nut
1/4"-20
Figure 5
Bracket
Wing Nut
1/4"-20
Lens
Wire Clip
Staples
Carriage Bolt
1/4"-20x1/2"
Bell Wire