BMS, otherwise known as a building automation system (BAS), is a computer-based control system installed in buildings that control and monitor the building's mechanical and electrical equipment such as ventilation, lighting, power systems, fire systems, and security systems. A BMS consists of software and hardware; the software program, usually configured in a hierarchical manner, can be proprietary, using such protocols as C-Bus, Profibus, and so on. In cooperation with our specialized partners, Emerald provides installation and maintenance of all BMS types.