Chamberlain RJO20C Manual page 19

Installation
(continued)
MOUNTING THE SAFETY REVERSING SENSORS
1. Slide a 1/4"-20x1/2" carriage bolt head into the slot on each sensor.
2. Use wing nuts to fasten safety reversing sensors to brackets, with lenses
pointing toward each other across the door. Be sure the lens is not
obstructed by a bracket extension.
3. Finger tighten the wing nuts.
Door
Wing Nut
WIRE THE SAFETY REVERSING SENSORS
1. Run the wire from both sensors to the garage door opener. Securely affix
the wire to the wall and ceiling with staples (not provided).
2. Strip 7/16 inch (11 mm) of insulation from each set of wires. Separate white
from the black the wires. Twist the white wires together. Twist the white/
black wires together.
3. On the garage door opener, push the tab with a screwdriver tip to insert the
white wires into the white terminal and the white/black wires into the grey
terminal.
To insert or
release wire,
push in tab with
screwdriver tip
7/16
(11 mm)
Tab
WHT/
WHT
BLK
Carriage Bolt
Wire
19
HARDWARE
Carriage Bolt
1/4"-20x1/2" (2)
Wing Nut
1/4"-20 (2)