SR511拍前咨询价格优势库存货品
¥6300.00
TA25 DU 32工控系统系列产品卡件模块
¥4120.00
TA524工控系统系列产品卡件模块
¥4120.00
TB521-ETH工控系统系列产品卡件模块
¥4120.00
TC625工控系统系列产品卡件模块
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主营产品，备件供应，充足库存
Foxboro（福克斯波罗）：I/A Series系统，FBM全系列（现场输入/输出模块）
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、
数据通信及处理等。
Westinghouse（西屋）：1C31系列DCS系统、CPU、OVATION系统、WDPF系统、
WEStation系统备件。
Triconex（英维思）:冗余容错控制系统、基于三重模件冗余（TMR）结构的现代化的容错控制器。
EMERSON（艾默生）:模块、卡件、驱动器等各类备件。
The anti-interference problem of PLC and man-machine interface in field application is messy and meticulous. Anti-interference design is a very d***rderly systematic project, involving detailed input and output equipment and detailed environment of industrial site. It is necessary to think about all aspects of the project. It is necessary to consider comprehensively from the aspects of reducing interference sources and interference paths according to the actual situation of the site, and make full use of various anti-interference methods to carry out programmable controllers The design of human-computer interface. Only by enhancing the anti-interference ability of PLC and HMI in field application can the system operate safely and stably.
1. select the power supply with excellent performance to restrain the interference introduced by the power grid.
For the power supply of PLC controller, non power line shall be selected for power supply, and special line shall be directly selected from the main bus line of low-voltage distribution room. The transformer is selected, and the capacity of the transformer should be about 1.2-1.5 times larger than the actual demand. The filter can also be added in front of the barrier transformer. For external power supply of transmitter and common signal, distributor with small distribution capacitance, repeated blocking and shielding and leakage sensing technology shall be selected.
The controller and i/o system are powered by their respective barrier transformers and separated from the main circuit power supply. The 24V DC power supply of PLC controller shall not supply power to all kinds of sensors outside, so as to reduce the interference of short circuit fault on PLC controller in peripheral sensor or power supply line. In addition, in order to ensure the power supply of the power grid is not stopped, the on-line uninterruptible power supply (UPS) can be selected for power supply. UPS has the performance of over voltage, undervoltage protection, software monitoring, and ***lation from the power grid, which can enhance the safety and reliability of power supply. For some main equipment, the communication power supply circuit can choose two-way power supply system.
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