Light or Button Activated Relay Application Package
In this application we will set up a very simple application that will Require at least a 2 Relay Reactor controller or Key Fob controller. We will use one Light Sensor (CDS Photocell), One Button or Key Fob Button, One Light Bulb, and an AC Power Source. We have provided the Configuration File for your Reactor or Key Fob controller on this page so no configuration is required unless you would like to reverse the operation of the light or add more lights/relays.
This Device could be referred to as a Light Activated Relay or a Dark Activated Relay. To Start the Neutral leg of your AC power source is connected directly to the Neutral Connection of the Light Bulb. Once it is dark out Relay 1 will come on as controlled by the Light Sensor (The AC Power Leg is attached to the Common of Relay one and the Normally Open leg of Relay 1 is connected directly to the Common of Relay 2). When Relay 1 comes on AC power is switched to its Normally Open Pin which applies power to the Common of Relay 2. A wire is attached from the Normally Open of Relay 2to the light bulbs Power Leg Connection. So in essence when both relays are on, and only when both relays are on, the light will have power and will be energized. This is all documented in the provided Schematic on this page.
Resources
Product Resources:
Package Includes
- List of equipment included in package:
- LRR15
- Photo Cell Light Sensor
- Toggle Button
- Jumper Wire Pack
- USB Cable
- Power Supply
This Product:
Video Resources
(Select a thumbnail to view the video)Introduction to Reactor Relays

Part 1: An Overview of Reactor Series Relay Controllers
Understanding Inputs

Part 2: All about Reactor Series Controller Inputs
Understanding Events

Part 3: All about Reactor Series Controller Events
Understanding Outputs

Part 4: All about Reactor Series Controller Outputs
Configuration Utility

Part 5: Learn how to use the NCD Configuration Utility to Setup your Reactor Controller
Induction Suppression

Learn about Induction Suppression and how to counter it using Capacitors