German zevatron plug zevatron model zevatron price

zevatron plug is an industrial data bus that has developed rapidly in recent years. It mainly addresses digital communication between intelligent instruments, controllers, actuators and other field devices on the industrial site, as well as information transfer between these field control devices and advanced control systems. Due to a series of prominent advantages such as simplicity, reliability, economy and practicality, fieldbus has received high attention from many standards bodies and computer manufacturers. It is an industrial data bus and serves as the underlying data communication network in the field of automation. The emergence of fieldbus plays a very important role in industrial development and has a significant impact on national economic growth. Fieldbus is mainly applied in fields such as petroleum, chemical industry, electric power, pharmaceuticals, metallurgy, processing and manufacturing, transportation, national defense, aerospace, agriculture and buildings.

zevatron plug introduction

Fieldbus is an open interconnection network that can interconnect with networks at the same layer or at different layers, and can also enable sharing of network databases. Fieldbus embodies the characteristics of distribution, openness, interconnectivity, and high reliability, which are precisely the shortcomings of DCS systems. DCS typically transmits signals on a one-to-one basis; the analog signals used have low accuracy and are susceptible to interference. Operators in the control room often find it difficult to adjust parameters and predict faults for analog instruments, leaving them in an "out-of-control" state. Many instrument manufacturers define their own standards, resulting in poor interchangeability. The functions of instruments are relatively single-purpose and difficult to meet modern requirements, and almost all control functions are located in the control station. In contrast, FCS adopts one-to-many bidirectional signal transmission. The digital signals used offer high accuracy and strong reliability, keeping equipment under the remote monitoring and controllable status of operators at all times. Users can freely select devices of different brands and types for interconnection according to needs. Smart instruments possess rich functions such as communication, control, and computation, and control functions are distributed among various smart instruments. Thus, we can see the significant progress of FCS compared to DCS. It is precisely due to the above characteristics of FCS that it offers considerable advantages from design and installation through commissioning to normal production: First, since intelligent devices distributed at the front end can perform relatively complex tasks, separate controllers and computing units are no longer required, saving on hardware investment and footprint; the wiring of FCS is relatively simple, and a single transmission line can connect multiple devices, greatly reducing installation costs; since field control devices often have self-diagnostic functions and can send fault information to the control room, maintenance workload is reduced; meanwhile, users have a high degree of autonomy in system integration and can flexibly select suitable products from manufacturers; the reliability and accuracy of the overall system are also significantly improved. All of this helps users reduce installation, operation, and maintenance costs, ultimately achieving the goal of increasing profits.

zevatron plug material

1) The material for female or male terminals shall be copper alloy, plated copper alloy, nickel, or nickel alloy. [Exception: If the structure of the electrical appliance or device permits, female or male terminals may be plated sheet metal or non-plated corrosion-resistant alloy. 2) If formed female terminals or trimmed male terminals appear in the form of terminal strips, when the terminal strip is continuously fed into the processing tool, the terminals are curled and separated from the strip; in this case, the edge where the terminal connects to the strip does not need plating. The standard terminals used in temperature and thermal cycling tests shall be tin-plated sheet metal or corrosion-resistant steel. According to the Rockwell 30T hardness standard, their hardness shall be Rockwell hardness 68 ± 5. Exception: If the female terminal is only suitable for connecting to male terminals made of copper alloy, then C26000 copper alloy standard terminals shall be used for testing. 2.3 According to the Rockwell 30T hardness standard, the hardness of standard terminals made of brass shall be 62 ± 7.

zevatron plug precautions for use

Fieldbus is gradually being promoted in industrial sites. Many devices not only have traditional instrument functions but also possess fieldbus capabilities. In DCS, fieldbus is widely used. The following issues should be noted when using fieldbus: 1) Communication distance. Fieldbus communication distance generally has certain requirements. For example, PROFIBUS/DP at a rate of 12Mbps can reach 200m using standard cable. If a rate of 187.5kbps is used, it can reach 1 000m. Communication distance has two meanings: first, the distance achievable between two nodes without repeaters; generally, distance is inversely proportional to communication rate; second, the distance between the two farthest nodes in the entire network. Manufacturers' descriptive materials are often unclear on this point. In actual use, the scope of the entire network must be considered. Electromagnetic wave signals take time to propagate through cables, especially in some high-speed fieldbuses. If the distance is increased, certain communication parameters must be modified; 2) Cable selection. The field environment determines the communication speed and medium of the fieldbus. Generally, fieldbus uses electrical signals to transmit data, and is inevitably affected by the surrounding electromagnetic environment during transmission. Most fieldbuses use shielded twisted pair cables. It must be noted that different types of fieldbuses may require different shielded twisted pair cables. Fieldbus developers generally specify a special type of cable, and the specified rate and transmission distance can only be achieved when this cable is used correctly. In extremely harsh electromagnetic conditions, optical fiber is a reasonable choice; otherwise, local interference may affect the operation of the entire fieldbus network; 3) Isolation. Generally, fieldbus electrical signals are electrically isolated from the interior of the device. Fieldbus cables are distributed throughout the workshop. If high voltage intrudes, it will damage the bus transceivers of all devices on the network segment. Without isolation, high voltage signals will continue to damage other internal circuits of the device, leading to serious consequences; 4) Shielding. The outer layer of the shielded cable used for fieldbus must be grounded at a single point. If high-frequency interference is severe, multi-point capacitive grounding can be used. Multi-point direct grounding is not allowed to avoid ground loop currents; 5) Connectors. Fieldbus generally does not have strict regulations for connectors, but improper handling can affect the communication of the entire system. For example, fieldbus generally uses a bus-type daisy chain connection method. When connecting each device, attention must be paid to how to insert and remove equipment without affecting existing communication, which places certain requirements on connectors; 6) Termination matching. Fieldbus signals, like all electromagnetic wave signals, exhibit reflection phenomena. Resistive matching should be used at both ends of each network segment of the bus. The first function is to absorb reflections, and the second is to achieve correct voltage levels at both ends of the bus to ensure communication. Therefore, fieldbus technology is the intersection and integration of control, computer and communication technologies. Its emergence and rapid development reflect the requirements in the control field for reducing costs, improving reliability, enhancing maintainability and increasing the intelligence of data acquisition.

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