Description
ABB 5SHX1960L0006 3BHB016120R0002 3BHE019719R0101 GVC736BE101
Shanxi Runsheng Import and Export Co., Ltd
We hope to meet your needs beyond the usual way and focus on economic and efficient cooperation. Xiongba Spare Parts Center is a reliable delivery partner. We are committed to establishing long-term partnership
To identify your common opportunities to save costs. We are pleased to translate these opportunities into working methods to ensure the best efficiency of the partnership.
Service of Shanxi Runsheng
1) 100% brand new!
2) Warranty: 12 months!
3) Packaging: carton for original packaging.
4) Delivery time: delivery within 3 days after payment
5) All goods will be tested before shipment.
6) We have experienced staff and extensive testing facilities.
What are the main sources of electromagnetic interference in PLC control system?
Radiated interference from space
Radiated electromagnetic field (EMI) in space is mainly generated by power network, transient process of electrical equipment, lightning, radio broadcasting, television, radar, high-frequency induction heating equipment, etc. It is usually called radiated interference, and its distribution is extremely complex. If the PLC system is placed in the radio frequency field, the radiation interference will be recovered, and its impact mainly passes through two paths; The first is to directly radiate the PLC and cause interference by circuit induction; It is the radiation of the network in the PLC communication, and the interference is introduced by the induction of the communication line. The radiation interference is related to the field equipment layout and the size of the electromagnetic field generated by the equipment, especially the frequency. It is generally protected by setting shielded cables, PLC local shielding and high-voltage relief elements.
Interference from external leads of the system
It is mainly introduced through power and signal lines, which is usually called conducted interference. This kind of interference is serious in the industrial scene of our country.
Interference from power supply
Practice has proved that there are many failures of PLC control system caused by the interference introduced by power supply. The author has encountered some problems in the commissioning of a project, and then replaced the PLC power supply with higher isolation performance to solve the problem.
The normal power supply of PLC system is supplied by the power grid. Due to the wide coverage of the power grid, voltage and circuit will be induced on the line due to all spatial electromagnetic interference. In particular, changes in the power grid, switching surges, startup and shutdown of large power equipment, harmonics caused by AC and DC rotating devices, and short circuit transient impact of the power grid are all connected to the power supply side through the transmission line. PLC power supply usually adopts isolated power supply, but its isolation is not ideal due to its mechanism and manufacturing process factors. In fact, due to the distribution parameter
All prices listed on the official website are subject to confirmation by contact: Wu Jiedong (manager).
Our product: brand new original packaging
Our warranty: All new or repaired parts have a 12 month warranty period beginning
Our payment: 100% telegraphic transfer of inventory items before shipment, conditions can be proposed!
If you have any downtime spare parts that you cannot find, please feel free to call or use email to contact me. If there are issues that the product cannot solve, please contact me. Product prices can be negotiated. Please do not consider contacting me!
