German Demag plug, Demag model, Demag price

Demag plug is a common line or path used in computers to connect various functional components and transmit data between them. In computer systems, buses are classified according to the objects they connect: Chip bus, also known as device-level bus, which is the bus inside the central processor chip. Internal bus, also known as system bus or board-level bus, which is the transmission path between various functional components of the computer; microcomputer buses are usually referred to as internal buses. External bus, also known as communication bus, which is the transmission path between computer systems, or between the computer host and peripheral devices. In computer systems, the common path for transmitting information between various components is called the bus, and microcomputers use a bus structure to connect various functional components.

Demag plug introduction

Any microprocessor must be connected to a certain number of components and peripheral devices. However, if each component and every type of peripheral device were directly connected to the CPU with a separate set of lines, the wiring would become intricate and complex, even difficult to implement. To simplify hardware circuit design and system structure, a set of lines configured with appropriate interface circuits is commonly used to connect to various components and peripheral devices. This set of shared connection lines is called the bus. Adopting a bus structure facilitates the expansion of components and devices, especially when unified bus standards are established, making it easier to achieve interconnection between different devices. In microcomputers, buses generally include internal buses, system buses, and external buses. The internal bus is the bus between various peripheral chips and the processor inside the microcomputer, used for chip-level interconnection; the system bus is the bus between various plug-in boards and the system board in the microcomputer, used for board-level interconnection; the external bus is the bus between the microcomputer and external devices. As a device, the microcomputer exchanges information and data with other devices through this bus, which is used for device-level interconnection. Additionally, broadly speaking, computer communication methods can be divided into parallel communication and serial communication, with the corresponding communication buses referred to as parallel buses and serial buses. Parallel communication offers high speed and good real-time performance, but due to the large number of occupied lines, it is not suitable for miniaturized products; although serial communication has a lower rate, it appears simpler, more convenient, and flexible in microprocessor circuits where data communication throughput is not very high. Serial communication is generally divided into asynchronous mode and synchronous mode. --- With the development of microelectronics and computer technology, bus technology is constantly developing and improving, resulting in a wide variety of computer bus technologies, each with its own characteristics.

Demag plug features

Utilizing existing DIN-rail terminal block frame screw connection technology, and adding circuits composed of electronic components, optoelectronic transmission coupling is achieved. The core of automatic control requires that the control unit be reliably isolated from various sensors and actuators to avoid interference. Sanmenwan WUKG2 opto-isolated terminals can effectively perform this function, ensuring that field signals match the low voltage required by electronic control devices. They can also serve as interface elements between peripheral equipment for process control and control, signal, and regulator devices, and are suitable for different voltage and power ranges. Opto-isolated terminals have advantages such as low signal loss at the control end, high switching frequency, no mechanical contact bounce, wear-free switching, high insulation voltage, resistance to vibration, independence from position, and long service life, thus they are widely used in the field of automatic control.

Demag plug main parameters

1) Rated voltage: Also known as operating voltage, it mainly depends on the insulating materials used in the connector and the spacing between contact pairs. Certain components or devices may fail to perform their intended functions when operated below their rated voltage. The rated voltage of a connector should effectively be understood as the maximum operating voltage recommended by the manufacturer. In principle, connectors can operate normally at voltages below the rated value. The author recommends selecting the rated voltage reasonably based on the connector's dielectric strength (withstand voltage) specifications, according to the application environment and safety level requirements. This means that with the same withstand voltage specification, different maximum operating voltages can be applied depending on the specific usage environment and safety requirements, which better aligns with actual operating conditions. 2) Rated current: Also known as operating current. Similar to rated voltage, connectors generally operate normally when the current is below the rated value. During the connector design process, thermal design is employed to meet rated current requirements because current flowing through contact pairs generates heat due to conductor resistance and contact resistance. If the temperature rise exceeds a certain limit, it can damage the connector's insulation and cause softening of the contact pair surface plating, leading to failures. Therefore, limiting the rated current effectively means limiting the internal temperature rise of the connector to not exceed the designed specified value. A key consideration during selection is that for multi-core connectors, the rated current must be derated. This is particularly important in high-current applications; for example, for 3.5mm contact pairs, the rated current is generally specified as 50A, but when using 5 cores, it must be derated by 33%, meaning the rated current per core is only 38A. The greater the number of cores, the larger the derating amplitude. 3) Contact resistance: Contact resistance refers to the resistance generated at the contact interface between two conductive contacts. Two issues should be noted during selection: First, the connector's contact resistance specification actually refers to the contact pair resistance, which includes both the contact resistance and the conductor resistance of the contact pair. Since conductor resistance is typically small, the contact pair resistance is often referred to as contact resistance in many technical specifications. Second, in circuits carrying small signals, attention must be paid to the conditions under which the specified contact resistance is tested, because oxide layers, oil stains, or other contaminants on the contact surfaces can create film resistance. As the film thickness increases, the resistance rises rapidly, making the film layer a poor conductor. However, this film layer can undergo mechanical breakdown under high contact pressure, or electrical breakdown under high voltage and large current. For some compact connectors designed with relatively low contact pressure, where the application involves only mA and mV levels, the film resistance is not easily broken down, which may affect signal transmission. One of the contact resistance test methods specified in GB5095 "Basic Test Procedures and Measurement Methods for Electromechanical Components Used in Electrical Equipment," namely the "Contact Resistance - Millivolt Method," stipulates that to prevent breakdown of the insulating film on the contacts, the open-circuit electromotive force (DC or AC peak) of the test circuit shall not exceed 20mV, and the DC or AC test current shall not exceed 100mA. 4) Shielding: In modern electrical and electronic equipment, the increasing density of components and their interrelated functions impose strict limits on electromagnetic interference. Therefore, connectors are often enclosed in metal housings to prevent internal electromagnetic energy radiation or interference from external electromagnetic fields. At low frequencies, only magnetic materials provide significant shielding against magnetic fields. In such cases, there are specific requirements for the electrical continuity of the metal housing, which relates to the housing contact resistance.

Weidou Intelligent Technology specializes in selling German Demag connectors, Demag connectors, Demag interface modules, Demag terminal blocks, Demag bus interfaces, Demag bus modules, Demag communication modules, Demag fieldbus, Demag plug interfaces, Demag communication interfaces, Demag adapters, Demag output modules, Demag distributor converters, Demag plug buses, Demag expansion modules, Demag original imports from Germany. Welcome customers to inquire and order.