ABB TVB-1202-1ANET 1381-647980-12 输入模块

ABB TVB-1202-1ANET 1381-647980-12  输入模块

工业公司应确保自身网络设计良好，有着防护周全的边界。企业应按ISA IEC 62443标准划分自身网络，保护所有无线应用，部署能快速排除故障的安全远程访问解决方案。公司网络，包括其工业网络基础设施设备，都应列入监视对象范围。运营技术(OT)团队可能会觉得公司的终端受到边界防火墙、专利安防软件、专业协议和物理隔离的防护，可以抵御数字攻击。但事实不是这样的，雇员、承包商和供应链员工将他们的笔记本电脑或U盘带入企业网络时，这些安全防护措施就被绕过了。必须确保所有终端都是安全的，要防止员工将自己的设备接入公司网络。事实上，黑客可以侵入OT环境中基于PC的终端。公司企业还应保护其IT终端不受OT环境中横向移动的数字攻击侵袭。

检测主电路的电压、电流等，当发生过载或过电压等异常时，为了防止逆变器和异步电动机损坏。工业世界联网程度的提升有一个关键问题：如果发生网络攻击且攻击成功，后果不堪设想，比如，网络罪犯入侵计算机系统并切断城市供电或供水。而且，不仅网络犯罪团伙会盯上ICS，民族国家黑客也常将ICS列为攻击敌对国关键基础设施的入口点。正如2017年6月NotPetya数据清除恶意软件爆发所展现的，ICS已经成为网络犯罪的主要目标。然而，很多工控设备都面临安全措施老化过时的风险，需要进行替换或升级。如何应对ICS面临网络攻击风险的事实?公共事业机构该从哪里开始防御这种之前从未考虑过的威胁?

为确保ICS能抵御今天的在线安全威胁，公司企业需采取足够的措施以创建有效工业安全项目并合理排定企业风险优先级。这听起来似乎是令人生畏的浩大工程，但健壮的多层安全方法可以分解为基本的3步：1)保护网络;2)保护终端;3)保护控制器。控制电路是给异步电动机供电（电压、频率可调）的主电路提供控制信号的回路，它有频率、电压的“运算电路”，主电路的“电压、电流检测电路”，电动机的“速度检测电路”，将运算电路的控制信号进行放大的“驱动电路”，以及逆变器和电动机的“保护电路”组成。将外部的速度、转矩等指令同检测电路的电流、电压信号进行比较运算，决定逆变器的输出电压、频率。

ABB TVB-1202-1ANET 1381-647980-12  输入模块

Industrial companies should ensure that their networks are well designed and have well-protected borders. Enterprises should divide their own networks according to ISA IEC 62443 standard, protect all wireless applications, and deploy secure remote access solutions that can quickly troubleshoot. The company network, including its industrial network infrastructure equipment, should be included in the scope of monitoring. Operational Technology (OT) teams may feel that the company's terminals are protected by border firewalls, proprietary security software, professional protocols and physical isolation, and can resist digital attacks. But this is not the case. When employees, contractors and supply chain employees bring their laptops or USB flash drives into the enterprise network, these security measures are bypassed. All terminals must be secure, and employees should be prevented from connecting their devices to the company network. In fact, hackers can invade PC-based terminals in the OT environment. Companies should also protect their IT terminals from digital attacks that move horizontally in the OT environment.

Detect the voltage and current of the main circuit, in order to prevent the inverter and asynchronous motor from being damaged when overload or overvoltage occurs. There is a key problem in improving the degree of networking in the industrial world: if a cyber attack occurs and succeeds, the consequences will be unimaginable. For example, cyber criminals invade computer systems and cut off urban power or water supply. Moreover, not only cyber criminal gangs will target ICS, but also hackers in nation-state often list ICS as the entry point to attack the key infrastructure of hostile countries. ICS has become the main target of cyber crime, as shown by the outbreak of malicious software in NotPetya data cleaning in June 2017. However, many industrial control equipment are facing the risk of outdated safety measures and need to be replaced or upgraded. How to deal with the fact that ICS faces the risk of cyber attacks? Where should public utilities start to defend against this threat that has never been considered before?

In order to ensure that ICS can resist today's online security threats, companies and enterprises need to take adequate measures to create effective industrial security projects and reasonably prioritize enterprise risks. It sounds like a daunting project, but a robust multi-layer security method can be broken down into three basic steps: 1) protecting the network; 2) protect the terminal; 3) Protect the controller. The control circuit is a circuit that provides control signals for the main circuit that supplies power to the asynchronous motor (with adjustable voltage and frequency). It consists of an arithmetic circuit of frequency and voltage, a voltage and current detection circuit of the main circuit, a speed detection circuit of the motor, a driving circuit that amplifies the control signals of the arithmetic circuit, and a protection circuit of the inverter and the motor. The external speed, torque and other instructions are compared with the current and voltage signals of the detection circuit to determine the output voltage and frequency of the inverter.