German SCHUHMANN plug SCHUHMANN model SCHUHMANN price

SCHUHMANN plugs are conductive devices that bridge two conductors in a circuit, allowing current or signals to flow from one conductor to another. An electronic connector is an electromechanical system that provides a separable interface for connecting two subsystems. Simply put, components used to complete electrical connections between circuits or electronic devices are called connectors, acting as a bridge between them. In addition to meeting general performance requirements, it is particularly important that electrical connectors achieve good contact, reliable operation, and easy maintenance. Their operational reliability directly affects the normal functioning of aircraft circuits and involves the safety of the entire host system. For this reason, host circuits have very strict requirements for the quality and reliability of electrical connectors. It is precisely because of the high quality and high reliability of electrical connectors that they are also widely used in military systems such as aviation, aerospace, and national defense. Common classification methods for electrical connectors include appearance, structure, and application.

SCHUHMANN plug working principle

If the motherboard (Mother Board) is a city, then the bus (bus) is like the public buses in the city, transporting bits (bit) that operate continuously back and forth along fixed routes. Each of these lines can only be responsible for transmitting one bit at a time. Therefore, multiple lines must be used simultaneously to transmit more data. The number of data items that the bus can transmit simultaneously is called the width (width), measured in bits. The greater the bus width, the better the transmission performance. The bus bandwidth (i.e., the total amount of data that can be transmitted per unit of time) is: Bus Bandwidth = Frequency x Width (Bytes/sec). When the bus is idle (other devices are connected to the bus in a high-impedance state) and a device needs to communicate with a target device, the initiating device drives the bus, sending out address and data. Other devices connected to the bus in a high-impedance state, upon receiving (or being able to receive) address information matching their own, accept the data on the bus. After the sending device completes communication, it releases the bus (output changes to high-impedance state).

SCHUHMANN plug material

Material selection is based on a comprehensive consideration of processability, product applicability, and strength properties. The cost of electronic connectors varies depending on material prices, processing difficulty, and production efficiency. Electronic connector materials mainly include insulator materials (plastic raw materials) and conductor materials (phosphor bronze, brass). Common engineering plastics used in electronic connectors include: LCP, NYLON, PBT. 1) LCP: Features a low coefficient of linear expansion, low injection molding shrinkage rate, outstanding strength and elastic modulus, and excellent heat resistance, with a high load deformation temperature, some reaching above 340 degrees. LCP also has excellent chemical resistance and airtightness. Therefore, LCP material is generally the first choice for connectors, especially those requiring SMT, such as eg:MINI PCI EXPRESS; DDR. 2) NYLON: Lower cost, very high tensile strength, outstanding wear resistance and self-lubricity, good fluidity beneficial for thin-wall molding, but significant shrinkage and prone to burrs. Strict baking is required before molding to prevent hydrolysis. NYLON material is mostly used for general connectors, especially DIP, such as eg:PCI 120P; PCI EXPRESS. 3) PBT: Plug-in electronic connectors, low cost, high strength, wear-resistant, but poor moldability and significant shrinkage. Due to the lower melting temperature, plastic melting phenomena may occur during wave soldering.

SCHUHMANN 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 using a rate of 187.5kbps, 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' introductory materials often lack clarity on this description. In actual use, the scope of the entire network must be considered. Electromagnetic 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 site environment determines the fieldbus communication speed and medium. Generally, fieldbus uses electrical signals to transmit data, 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 cable, and the specified rate and transmission distance can only be achieved under correct use of this cable. 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 internal equipment. Fieldbus cables are distributed throughout the workshop. If high voltage intrudes, it will damage the bus transceivers of all devices in the entire network segment. Without isolation, high voltage signals will continue to damage other internal circuits of the equipment, leading to serious consequences. 4) Shielding. The outer layer of the shielded cable used in 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 conditions, which places certain requirements on the connector. 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.

Weidou Intelligent Technology professionally sells German SCHUHMANN connectors, SCHUHMANN connectors, SCHUHMANN interface modules, SCHUHMANN terminal blocks, SCHUHMANN bus interfaces, SCHUHMANN bus modules, SCHUHMANN communication modules, SCHUHMANN fieldbus, SCHUHMANN plug interfaces, SCHUHMANN communication interfaces, SCHUHMANN adapters, SCHUHMANN output modules, SCHUHMANN distributor converters, SCHUHMANN plug bus, SCHUHMANN expansion modules, SCHUHMANN original German imports. Welcome customers to inquire and order.