I’ve used Wattstopper relays to control lights on quite a few projects. Wattstopper makes the Digital Lighting Management (DLM) System and it is a fairly simple way to control lights.
Today I will describe how I use a Room Controller known as the Wattstopper LMRC-111 to control lights in a room. The LMRC-111 attaches to a metal box through a ½” KO. It has five leads coming out of a nipple that inserts into a 1/2″ KO. The black lead connects to a hot, white lead to neutral and the red lead is the switch leg to the light. The purple lead is for the positive control signal and the pink lead is for the negative control signal. Signal leads are for 0-10V dimming control.
I usually use a luminary MC in between the 4S with the LMRC-111 and the light. In the picture above I piped to a light in the corridor in the right box and flexed to an overhead inslab stub down and flexed down to a newly installed Square D 42 circuit panel.
You can control the light with the “Load A” button on the LMRC-111 but that is not the recommended way. Using a low voltage switch is how you should control the light. An LMSW-101 is a simple DLM wall switch that connects to the LMRC-111 via a Cat5e cable. RJ45 connectors need to be terminated on both ends of the Cat5 cable in the T568B wiring configuration.
Wattstopper promotes their trademarked Plug n’ Go feature and that literally describes the ease of use. Just plug in the cat5 to the LMRC and the LMSW and the system works, lights turn on and off.
There you have it, an easy solution to lighting control for a room.
