The WJ-1 is a controller for building facilities such as HVAC, lighting, and chiller plants. This product is designed to be robust, have higher reliability, longer product lifespan, and controls energy consumption to a low level in a building without periodical maintenance. RJ-1 is a unit that extends the functionality of WJ-1. Connected with Daisy Chain Ethernet, original wire-saving technology by Azbil, wiring cost and installation time can be reduced. Near Field Communication with a smartphone enables users easy access to managing parameters and data as well as reduces installation and troubleshooting time on site.