02-00374-00 辐射电磁场 通信线路的感应引入干扰

>>>>>型号:02-00374-00 辐射电磁场 通信线路的感应引入干扰

【功能描述】

02-00374-00空间的辐射电磁场(EMI)主要是由电力网络、电气设备的暂态过程、雷电、无线电广播、电视、雷达、高频感应加热设备等产生的,通常称为辐射干

扰其分布极为复杂。若PLC系统置于所射频场内，就回收到辐射干扰，其影响主要通过两条路径:是直接对PLC内部的辐射,由电路感应产生干扰:;而

是对PLC通信内网络的辐射,由通信线路的感应引入干扰。02-00374-00辐射干扰与现场设备布置及设备所产生的电磁场大小特别是频率有关,一般通过设置 屏蔽

电缆和PLC局部屏蔽及高压泄放元件进行保护。随着科学技术的发展，PLC在工业控制中的应用越来越广泛。PLC控制系统的可靠性直接影响到工

业企业的安全生产和经济运行,系统的抗干扰能力是关系到整个系统可靠运行的关键。自动化系统中所使用的各种类型PLC,有的是集中安装在控制

室,有的是安装在生产现场和各电机设备上,02-00374-00它们大多处在强电电路和强电设备所形成的恶劣电磁环境中。要提高PLC控制系统可靠性,一方 面要求

PLC生产厂家用提高设备的抗干扰能力;另-方面,要求工程设计、安装施工和使用维护中引起高度重视,多方配合才能完善解决问题,有效地增强系统

的抗干扰性能。

【英文介绍】

The radiation electromagnetic field (EMI) in space is mainly generated by power networks, transient processes of electrical equipment, lightning, radio broadcasting, television, radar, high-frequency induction heating equipment, and so on, and is often called radiation dry

The distribution of perturbations is extremely complex. If the PLC system is placed in the radio frequency field, the radiation interference is recovered, and its impact is mainly through two paths: it is directly to the radiation inside the PLC, and interference is generated by the circuit induction: while

It is the radiation to the network in PLC communication, and interference is introduced by the induction of the communication line. Radiation interference is related to the field equipment layout and the size of the electromagnetic field generated by the equipment, especially the frequency, which is generally set by shielding

Cable and PLC local shielding and high voltage drain element protection. With the development of science and technology, the application of PLC in industrial control is more and more extensive. The reliability of PLC control system directly affects the work

The safe production and economic operation of industrial enterprises, the anti-interference ability of the system is the key to the reliable operation of the whole system. Various types of PLCS used in automation systems, some are centrally installed in control

Some of the rooms are installed on the production site and various motor equipment, most of which are in the harsh electromagnetic environment formed by strong current circuits and strong current equipment. To improve the reliability of PLC control system, one side requirements

PLC manufacturers use to improve the anti-interference ability of equipment; On the other hand, it requires great attention in engineering design, installation, construction and use and maintenance, and multi-party cooperation can perfect the problem and effectively enhance the system

The anti-interference performance.

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