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Input coupling unit ICU KS d211 B101 3bhe022455r1101

Contact person: Linda

Contact number: 86 18050025541 (WeChat：18050025541)

E-mail: 3005304301@qq.com

Since 2014, we have been working in the field of industrial automation parts. We mainly provide automation spare parts for manufacturers to stop production for heavy industries around the world. We have stock including PLC, DCS, operation panel, servo drive and servo motor, excitation board, other electrical equipment parts, and also provide in-production products.

Reliability is the life of DCS development. There are three main measures to ensure the high reliability of DCS: one is to apply high reliability hardware equipment and production technology; Second, redundancy technology is adopted; The third is to realize the fault-tolerant technology, fault self diagnosis and automatic processing technology of the system in software design. The MTBF of most distributed control systems can reach tens of thousands or even hundreds of thousands of hours. The process control level realizes the decentralized control functions of signal input, transformation, operation and output. In different DCS, the control devices of the process control level are different, such as the process control unit, the field control station, the process interface unit, etc., but their structural forms are basically the same, and they can be collectively referred to as the field control unit FCU. The process management level is composed of engineer station, operator station, management computer, etc. to complete the centralized monitoring and management of the process control level, which is usually called operation station. The hardware and software of DCS are designed according to the modular structure, so the development of DCS is actually to combine various basic modules provided by the system into a system according to the actual needs. This process is called system configuration. The field control unit is generally far from the control center and installed near the site. Its highly modular structure can be configured into a process control unit with a scale ranging from several monitoring points to hundreds of monitoring points according to the needs of process monitoring and control. The structure of the field control unit is that many plug-in boards (or cards) with dispersed functions are installed in the plug-in board box according to certain logic or physical sequence. Each field control unit and its control management level are connected by bus to realize information interaction.

The hardware configuration of the field control unit needs to complete the following contents:

Configuration of plug-ins: configure host plug-ins (CPU plug-ins), power plug-ins, I / O plug-ins, communication plug-ins and other hardware devices according to system requirements and control scale;

Hardware redundancy configuration is an important means to improve the reliability of DCs by redundant configuration of key equipment. DCs can usually realize redundant configuration of host plug-in, power plug-in, communication plug-in, network and key I / O plug-in.

The hardware installation is different from DCS, and the installation of various plug-ins in the plug-in box will have corresponding provisions in the logical sequence or physical sequence. In addition, the field control unit is generally divided into two types: basic type and extended type. The so-called basic type means that various plug-ins are installed in a plug-in box, but more often, an expandable structural form is required, that is, a field control unit also includes several digital input / output expansion units, which are connected with each other by bus.

In essence, the structural form and configuration requirements of the field control unit are consistent with the hardware configuration of the modular PLC.