Chamberlain C2405C Istallation Manual page 28

Installation
STEP 14 Wire the Safety Reversing Sensors (continued)
OPTION A - PRE-WIRED INSTALLATION
1. Cut the sensor wires, making sure there is enough wire to reach the pre-installed wires from the
wall.
2. Separate the sensor wires and strip insulation from each end. Choose two of the pre-installed
wires and strip insulation from each end. Choose the same color pre-installed wires for each
sensor.
3. Connect the pre-installed wires to the sensor wires with wire nuts making sure the colors
correspond for each sensor.
4. At the garage door opener, strip the end of the wires previously connected to the sensors. Twist
the like-colored wires together.
5. Using a screwdriver, push in the terminal tabs, and insert the wire color connected to the
sensor's white wire into the white terminal. Insert the other wire color connected to the sensor's
white/black wire into the grey terminal.
Pre-installed
wires
Safety reversing sensor wires
Safety reversing
sensor wires
White
White/Black
Pre-installed wires
Yellow
Purple
7/16" (11 mm)
28
7/16" (11 mm)
Wire nuts (not provided)
Pre-installed wires
Yellow (for example)
Purple (for example)
Wire channel
Purple
Yellow