One of my frustrations has been the lack of a reliable outdoor z-wave motion sensor. Less than two years ago, I purchased a commercially available sensor and mounted it on my garage. It lasted a few months. I replaced it under warranty, and the new sensor lasted about another year before failing. I have trouble understanding this because in three places on my house, I have inexpensive motion sensors lights that I purchased for less than $15 at a major home improvement superstore. All of these lights have worked reliably for over a decade. One is mounted very close to the position of z-wave motion sensor, so it is exposed to the same conditions as the much more costly motion sensor that failed.
I decided to try to convert an outdoor motion sensor light from that superstore into a z-wave motion sensor. To do this, I added a Vision ZL7431 z-wave relay. (I selected the Vision relay because it was the smallest I could find. There is another similar relay on the market which is slightly larger. I assume it will work fine, but I did not test it.) The wiring I used is as follows:
- Connect white wires from power mains, motion sensor, ZL7431 relay, and lights.
- Connect black wires from power main, ZL7431 relay, and motion sensor.
- Connect green wire ZL7431 relay, red wire from motion sensor, and black wires from lights.
- Cap off yellow wire from ZL7431 relay.
- Cap off red wire from ZL7431 relay.
- Cap off blue wire from ZL7431 relay.
The resulting light is mounted on the corner of my garage, pointed so that if there is motion detected in my driveway, the motion sensor lights turn on. Then, the ZL7431 sends a signal to my Vera controller, which turns on other lights around the outside of my house. The On time of the motion sensor lights is controlled by the timer on the motion sensor, while the On time of the other lights is controlled by the Vera.
The attached wiring diagram and pictures show what I did.
DISCLAIMER: If you do not have confidence in your ability to work with 120 volt wiring, do not attempt this. This is enough voltage to kill someone, so you must take appropriate precautions, such as turning off the circuit before installing a light, and triple checking your work before turning power back on. Also, while this has worked fine for me for about a month now, I cannot provide any assurance that it will work at your house.