ISO 16484-2:2004规定了在楼宇自动化和控制系统（BACS）内执行任务的硬件要求。本手册提供了用于理解ISO 16484-2和ISO 16484-3的术语、定义和缩写。ISO 16484-2:2004仅涉及物理项目/设备，即用于管理功能的设备、操作员站和其他人机界面设备；控制器、自动化站和专用控制器；现场设备及其接口；设备的布线和互连； 工程和调试工具。 ISO 16484-2:2004显示了一个通用系统模型，所有不同类型的BAC及其互连（BAC网络）都可以适用。ISO 16484-5将提供BACS网络在LAN拓扑方面的图形概念。

ISO 16484-2:2004 specifies the requirements for the hardware to perform the tasks within a building automation and control system (BACS). It provides the terms, definitions and abbreviations for the understanding of ISO 16484-2 and ISO 16484-3. ISO 16484-2:2004 relates only to physical items/devices, i.e. devices for management functions, operator stations and other human system interface devices; controllers, automation stations and application specific controllers; field devices and their interfaces; cabling and interconnection of devices; engineering and commissioning tools. ISO 16484-2:2004 shows a generic system model to which all different types of BACS and their interconnections (BACS network) can fit. A graphical concept of the BACS network in terms of LAN topology will be provided in ISO 16484-5.