US Patent 7821160 Modular wall box system

A device is provided and includes an actuator, mounted to a wall box, including a power supply, an electrical load controller and a terminal coupled to the power supply and the controller, an actuator interface disposed on the actuator to receive first commands relating to basic electrical load control by the controller and a separate interface, including a header to communicate with the terminal whereby the separate interface receives power and communicates with the controller, the separate interface being supportable at the wall box and, when the header and terminal communicate, configured to identify a type of the actuator and to receive second commands of a type unique to the identified actuator type and relating to the basic and enhanced electrical load control by the controller.