ABB ICST08A9 远程终端单元

远程终端单元( Remote Terminal Unit, RTU)， -种针对通信距离较长和工业现场环境恶劣而设计的具有模块化结构的、特殊的计算机测控单元,它将末端检测仪表和执行机构与远程调控中心的主计算机连接起来,有远程数据采集、控制和通信功能，能接收主计算机的操作指令,控制末端的执行机构动作。按照国标CB/T 14429 - 93《远动设备及系统术语》中的定义,远动指应用通信技术,完成遥测、遥信、遥控和遥调等功能的总称,简称“四遥”

RTU可以用各种不同的硬件和软件来实现，取决于被控现场的性质、现场环境条件、系统的复杂性、对数据通信的要求、实时报警报告、模拟信号测量精度、状态监控、设备的调节控制和开关控制。由于各制造商采用的数据传输协议、信息结构和检错技术不同,各制造厂家-般都生产SCADA系统中配套的专用RTU

Remote Terminal Unit (RTU) is a special computer measurement and control unit with a modular structure designed for long communication distances and harsh industrial environment. It connects the end detection instrument and execution mechanism with the main computer of the remote control center, and has remote data collection, control, and communication functions. It can receive operation instructions from the main computer and control the actions of the end execution mechanism. According to the definition in the national standard CB/T 14429-93 "Terminology of Telecontrol Equipment and Systems", telecontrol refers to the general term for the application of communication technology to complete functions such as telemetry, remote signaling, remote control, and remote adjustment, abbreviated as "four remotes"

RTU can be implemented using various hardware and software, depending on the nature of the controlled site, on-site environmental conditions, system complexity, requirements for data communication, real-time alarm reporting, analog signal measurement accuracy, status monitoring, equipment regulation control, and switch control. Due to the different data transmission protocols, information structures, and error detection technologies adopted by various manufacturers, they generally produce specialized RTUs that are matched in SCADA systems