German Guntermann & Drunck plugs, Guntermann & Drunck models, Guntermann & Drunck prices

Guntermann & Drunck plugs are connectors used to connect serial and parallel cables to a data bus. The naming format for data bus connectors is DB-x, where x represents the number of wires inside the connector. Each wire is connected to a pin in the connector, but in many cases, not all pins are assigned a function. Data bus connectors are defined by various EIA/TIA standards. They are a type of connector used to connect serial and parallel cables to a data bus. DB connectors are named in the DB-x format, where x represents the number of wires inside the connector. Each wire is connected to a pin in the connector, but in many cases, not all pins are assigned a function. DB connectors have 9, 15, 25, 37, and 50 pin configurations. DB connectors define the physical structure of the connector, not the purpose of each wire. For example, DB-9 has 9 pins and is used to connect a mouse. DB-25 has 25 pins and is used to connect a printer.

Introduction to Guntermann & Drunck plugs

As automation technology has evolved from standalone machine control to factory automation FA and then to system automation, the factory automation information network can be divided into the following three-layer structure: factory management level, workshop monitoring level, and field device level. The fieldbus is the communication network between devices at the factory bottom layer. Here we first introduce Ethernet, specifically industrial Ethernet. Industrial Ethernet is an industrial network protocol derived from the office automation domain. By convention, it mainly refers to the IEEE 802.3 protocol. If the TCP/IP protocol suite is further adopted, it is expressed as "Ethernet + TCP/IP". Its technical characteristics are mainly suitable for information management and information processing systems, and it has achieved great success in the IT industry. In the field of information integration at the factory management level and workshop monitoring level, there are many successful cases of industrial Ethernet, and there are also many applications at the device layer where real-time performance is not strictly required. Due to the wide variety of fieldbuses and inconsistent standards, many people hope that Ethernet technology can intervene in the lower layers of devices and widely replace existing fieldbus technologies. Schneider Electric is an active advocate and practitioner of this idea, with a batch of industrial-grade products released and put into practical application. However, Ethernet cannot truly solve real-time and determinism issues, so most field layers will still prefer fieldbus technology. Due to technological limitations and conflicts of interest among various manufacturers, the current situation of coexistence of multiple industrial bus technologies and continuous penetration of Ethernet technology will persist for some time. Users can choose the required solution based on technical requirements and actual conditions.

Guntermann & Drunck plug types

1) 232-C is a serial physical interface standard established by the American EIA (Electronic Industry Association). RS is the abbreviation for "Recommended Standard," 232 is the identifier number, and C indicates the revision number. The RS-232-C bus standard has 25 signal lines, including a main channel and an auxiliary channel. In most cases, the main channel is primarily used. For general full-duplex communication, only a few signal lines are needed, such as one transmit line, one receive line, and one ground line. The RS-232-C standard specifies that the driver allows a capacitive load of 2500pF. The communication distance is limited by this capacitance. For example, when using a communication cable with 150pF/m, the maximum communication distance is 15m; if the capacitance per meter of cable decreases, the communication distance can increase. Another reason for the short transmission distance is that RS-232 uses single-ended signal transmission, which suffers from common ground noise and cannot suppress common-mode interference, so it is generally used for communication within 20m. 2) RS-485 bus: When the required communication distance ranges from tens of meters to kilometers, the RS-485 serial bus standard is widely adopted. RS-485 uses balanced transmission and differential reception, thus having the ability to suppress common-mode interference. Additionally, the bus transceiver has high sensitivity and can detect voltages as low as 200mV, allowing signal recovery over distances beyond a kilometer. RS-485 operates in half-duplex mode, meaning only one point can be in the transmitting state at any time; therefore, the transmitting circuit must be controlled by an enable signal. RS-485 is very convenient for multi-point interconnection, saving many signal lines. Applying RS-485 allows networking to form distributed systems, permitting up to 32 drivers and 32 receivers to be connected in parallel.

Guntermann & Drunck plug operation

A bus operation process completes the transfer of information between two modules. The master module initiates the operation process, and the other is the slave module. At any given moment, only one master module can occupy the bus. Bus operation steps: The master module requests bus control, and the bus controller makes the arbitration. Error checking during data transmission: After the master module obtains bus control, it addresses the slave module, and data transmission proceeds after confirmation from the slave module. Bus timing protocols: Timing protocols ensure synchronized operation between both parties in data transmission and correct transmission. There are three types of timing protocols: Synchronous bus timing: All modules on the bus share the same clock pulse for controlling the operation process. All actions of each module occur at the start of a clock cycle, and most actions are completed within one clock cycle. Asynchronous bus timing: The occurrence of an operation is determined by specific signals from the source or destination module. The occurrence of an event on the bus depends on the occurrence of the previous event, with both parties providing handshake signals to each other.

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