BACnet/IP protocol allows communication between the components of a building automation and control system (for example, an electric boiler, lighting, security systems, and related equipment). The BACnet/IP protocol defines a number of services that are used to communicate between devices and the objects that are acted upon by those services.

SCR's or silicon controlled rectifiers are switching devices for electrical power consisting of thyristors and a control circuit. Since there are no moving parts, this device can switch electrical loads within milliseconds and for millions of times.