German D-E-K Dischereit plug, D-E-K Dischereit model, D-E-K Dischereit price

D-E-K Dischereit plugs are conductive devices that bridge two conductors in a circuit, allowing current or signals to flow from one conductor to another. They are widely used in various electrical circuits to connect or disconnect current or signals. This connection may be temporary and allow for easy plugging and unplugging, or it may be a permanent junction between electrical equipment or wires. Electronic connectors are devices that transmit electronic signals (analog or digital) and provide a separable interface to connect two sub-electronic systems. They are components used to complete electrical connections between circuits or electronic machines. Examples include power plugs/sockets, IC sockets, and telephone line plugs. They are widely used in the electronics industry. An electronic connector is an electromechanical system that provides a separable interface to connect two sub-electronic systems. Simply put, components used to complete electrical connections between circuits or electronic machines are called connectors, acting as a bridge between them. Connectors serve as electrical/electronic transmission and connection components between circuits, components, and systems, ensuring stable and reliable flow of power, signals, and current, while facilitating product assembly, maintenance, and replacement.

D-E-K Dischereit plug structure

Electrical connectors consist of a fixed-end electrical connector, i.e., the female contact (referred to as the socket), and a free-end electrical connector, i.e., the male contact (referred to as the plug). The socket is fixed to the powered component via its square (or round) flange (some also use welding methods). The plug is generally connected to a cable, and the plug-socket connection is achieved through a coupling nut. Electrical connectors are composed of three basic units: the shell, the insulator, and the contacts. 1) Shell: The electrical connector shell refers to the housing of the plug and socket, the coupling nut, and the rear accessories. The housing protects internal parts of the electrical connector, such as the insulator and contacts (collectively referred to as pins and sockets), from damage. Positioning key slots on the housing ensure proper alignment of the plug and socket. The coupling nut is used for connecting and separating the plug and socket. Rear accessories protect the wire-to-contact termination area from damage and secure the cable. The shell also provides a certain degree of electromagnetic shielding. Shells are typically machined from aluminum alloy (machining, cold extrusion, die casting). Steel shells are mostly used for glass-sealed and high-temperature electrical connectors. 2) Insulator: Composed of pin insulators, socket insulators, interface seals, and wire seals. It holds pins and sockets in their designated positions and provides electrical insulation between contacts and between contacts and the shell. Sealing measures are achieved using insulators with interface seals and wire seals to improve the environmental resistance of the electrical connector. To withstand high temperatures, low temperatures, and flame retardancy, and to ensure stable and reliable geometric dimensions of components, insulators are mostly molded from thermosetting plastics. Interface seals and wire seals are formed by molding silicone rubber, etc. 3) Contacts: Contacts include male and female contacts, sometimes referred to as pins and sockets. Connection methods include soldering, crimping, press-fit, and wire-wrapping, used to achieve circuit connections. Pins and sockets are key components of electrical connectors, directly affecting their reliability. Pins and sockets are mostly machined from elastic copper alloys with good conductivity, and their surfaces are silver- or gold-plated to achieve low contact resistance and corrosion resistance. Sockets generally include split-type sockets, wire-spring sockets, crown-spring sockets, and stamped sockets. Structural features include: environmental resistance, bayonet (quick) connection, multiple key positions (anti-misinsertion), crimped connection between contacts and wires (single-wire insertion/removal facilitates fault handling). The shell with a shielding ring ensures 360° electromagnetic interference shielding capability.

D-E-K Dischereit plug classification

Industrial bus networks can be categorized into three types: 485 networks, HART networks, and FieldBus fieldbus networks. 485 network: RS485/MODBUS is a popular industrial networking method, characterized by simple and convenient implementation, and there are many instruments supporting RS485. Instrument manufacturers have also shifted to support RS485/MODBUS, for the simple reason that RS485 conversion interfaces are not only inexpensive but also available in a wide variety. At least in the low-end market, RS485/MODBUS will remain the primary industrial networking method. HART network: HART is a transitional bus standard proposed by Emerson, mainly characterized by superimposing digital signals on a 4-20 mA current signal. However, this protocol is not truly open; one must join its foundation to obtain the protocol, which requires a fee. HART technology is mainly monopolized by several large foreign companies. In recent years, domestic companies have also been working on it, but have not yet reached the level of foreign companies. Many smart instruments come with [HART round card] and support HART communication functions. However, from a domestic perspective, this functionality has not been truly utilized for device networking and monitoring; at most, handheld communicators are used for parameter setting. In the long term, due to reasons such as low HART communication speed and difficult networking, the application of HART instruments will show a downward trend. FieldBus Fieldbus network: Fieldbus is one of the hot technologies in the automation field today, hailed as the computer LAN of the automation field. Its emergence marks the beginning of a new era in automation control technology. Fieldbus is a digital, serial, multi-station communication network connecting instruments at the control site with control devices in the control room. Its key hallmark is the ability to support bidirectional, multi-node, bus-style fully digital communication. Fieldbus technology has become a hotspot in the development of international automation and instrumentation. Its emergence has brought revolutionary changes to traditional control system structures, further advancing automatic control systems towards "intelligence, digitization, informatization, networking, and decentralization," forming a new type of networked communication fully distributed control system—the Fieldbus Control System FCS (Fieldbus Control System). However, fieldbus has not yet formed a truly unified standard. Multiple standards such as ProfiBus, CANbus, and CC-Link coexist, each with its own niche. When they will be unified remains uncertain. There are relatively few types of instruments supporting fieldbus, leaving little room for choice, with higher prices and smaller usage volumes.

D-E-K Dischereit plug safety parameters

1) Insulation resistance: Insulation resistance refers to the resistance value exhibited due to leakage current generated within or on the surface of the insulating part of a connector when voltage is applied to it. It is mainly influenced by factors such as insulating materials, temperature, humidity, and contamination. The insulation resistance values provided in connector catalogs are typically specified under standard atmospheric conditions; under certain environmental conditions, the insulation resistance may decrease to varying degrees. Additionally, pay attention to the test voltage value for insulation resistance. According to Insulation Resistance (MΩ) = Voltage Applied to the Insulator (V) / Leakage Current (μA), applying different voltages yields different results. In connector testing, the applied voltages generally have three levels: 10V, 100V, and 500V. 2) Rated voltage: Dielectric strength is the critical voltage that the mutually insulating parts of a contact pair, or the insulating parts and ground, can withstand for a specified time without breakdown, exceeding the rated voltage. It is mainly influenced by contact pair spacing, creepage distance, geometric shape, insulator material, ambient temperature and humidity, and atmospheric pressure. 3) Mechanical life: The mechanical life of a connector refers to its mating cycle life, typically specified as 500 to 1000 cycles. When this specified mechanical life is reached, indicators such as contact resistance, insulation resistance, and dielectric strength of the connector should not exceed specified limits. Strictly speaking, mechanical life is related to time; using 500 cycles over 10 years is obviously different from using 500 cycles over 1 years. First, select the number of contact pairs based on circuit requirements, while considering the connector's volume and total separation force. A larger number of contact pairs naturally results in a larger volume and a relatively higher total separation force. In cases with high reliability requirements where volume permits, two contact pairs can be connected in parallel to improve connection reliability. In connector plugs and sockets, pins (male contacts) and sockets (female contacts) are generally interchangeable. In actual use, selection can be made based on the live status at both ends of the plug and socket. For example, if the socket needs to remain live, choose a socket equipped with female contacts, because the live contacts are embedded in the insulator, making them less accessible to human touch and thus relatively safer. Mainly consider the electrical continuity of contact pairs during vibration, shock, and collision under specified frequency and acceleration conditions. Contact pairs may experience instantaneous open circuits under such dynamic stress. The specified instantaneous interruption times are generally 1μs, 10μs, 100μs, 1ms, and 10ms. Note how to judge instantaneous interruption faults in contact pairs. Currently, it is considered that a fault in a closed contact pair (contact) has occurred when the voltage drop across its ends exceeds 50% of the power source electromotive force. In other words, there are two criteria for judging instantaneous interruption: duration and voltage drop, both of which are indispensable. Connectors generally consist of plugs and sockets, where the plug is also called a free-end connector, and the socket is also called a fixed connector. Circuit connection and disconnection are achieved through the mating and separation of plugs and sockets, resulting in various connection methods for plugs and sockets. For circular connectors, the main connection methods are threaded coupling, bayonet coupling, and push-pull (ball-lock) coupling. Among these, threaded coupling is the most common, offering advantages such as simple processing technology, low manufacturing cost, and wide applicability, but it has a slower connection speed and is not suitable for applications requiring frequent mating/unmating and rapid connections. Bayonet coupling has a faster connection speed due to the longer lead of its three bayonet slots, but it is more complex to manufacture and thus has a higher cost. Push-pull (ball-lock) coupling is the fastest among the three connection methods; it does not require rotational motion, only linear motion, to achieve connection, separation, and locking. As it belongs to the straight push-pull connection method, it is only suitable for connectors with low total separation force. It is generally more common in small-sized connectors.

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