以前是S5。3-1983. 建立由计算机、可编程控制器、微型计算机和具有共享控制、共享显示或其他接口功能的基于微处理器的系统组成的该类仪器的文档。提供了用于将现场仪表、控制室仪表和其他硬件连接到上述设备的符号。术语以最广泛的通用形式定义，以描述这些设备的各种类别。

Formerly S5.3-1983. Establishes documentation for that class of instrumentation consisting of computers, programmable controllers, minicomputers, and microprocessor-based systems that have shared control, shared display or other interface features. Symbols are provided for interfacing field instrumentation, control room instrumentation, and other hardware to the above. Terminology is defined in the broadest generic form to describe the various categories of these devices.