Evolution Perspective of Emcs

The primary purpose of energy management control systems (EMCS) is to provide healthy and safe operating conditions for building occupants, while minimizing the energy and operating costs of the given building. Aided by technological developments in the areas of electronics, digital computers, and advanced communications, EMCS have been developed to improve indoor quality while saving more energy.

Electromechanical Timers

The earlier devices used in the first half of the twentieth century to control building loads (such as lighting and space conditioning) were electromechanical timers, in which a small motor coupled to a gearbox was able to switch electrical contacts according to a predefined time schedule. Normally the output shaft of the gearbox causes one or more pairs of electrical contacts to open or close as it rotates. These electromechanical devices were simple and reliable, and they are still...