由于开放系统技术的应用,在一个建筑自动化系统中,同样功能的各种产品,可以由多个生产厂商供货,从而使用户有权选择最好的产品;此外,在系统长期运行过程中,可以选择不同品牌的同样功能的价格较低的替代产品进行维修,因此降低了建筑自动化系统的寿命周期成本。所以,用户现在要求建筑自动化控制网络必须是一个开放系统。 Due to the application of open system technology, in a building automation system, a variety of products with the same functions can be supplied by multiple manufacturers so that users have the right to select the best products. In addition, during long-term operation of the system, You can choose the same function of different brands of lower-priced alternative products for maintenance, thus reducing the life cycle cost of building automation systems. Therefore, the user now requires that the building automation control network must be an open system.