German TELEFRANG plug TELEFRANG model TELEFRANG price

TELEFRANG plug refers to the interface between the central processing unit and the standard communication subsystem. For example: RS232 interface. The RS232 interface is a serial port. Data transmission between computers or between a computer and a terminal can use two methods: serial communication and parallel communication. Serial communication is widely adopted because it uses fewer lines, has low cost, and avoids inconsistencies in line characteristics, especially during long-distance transmission. In serial communication, both communicating parties are required to use a standard interface so that different devices can be easily connected for communication. The RS-232-C interface (also known as EIA RS-232-C) is one of the most commonly used serial communication interfaces. It was established in 1970 by the Electronic Industries Alliance (EIA), together with the Bell System, modem manufacturers, and computer terminal manufacturers, as a standard for serial communication. Its full name is "Technical Standard for Serial Binary Data Exchange Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE)." This standard specifies the use of a 25-pin DB25 connector, defines the signal content for each pin of the connector, and specifies the voltage levels for various signals.

TELEFRANG Plug Introduction

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-tier structure: factory management level, workshop monitoring level, and field device level. 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 denoted as "Ethernet + TCP/IP". Its technical characteristics are primarily suitable for information management and information processing systems, and it has achieved significant success in the IT industry. In the field of information integration at the factory management level and workshop monitoring level, Industrial Ethernet already has many successful cases, 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 penetrate the lower device layers and widely replace existing fieldbus technologies. Schneider Electric is an active advocate and practitioner of this idea, with a range of industrial-grade products already available and in practical application. However, since Ethernet cannot truly solve real-time and determinism issues, 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 select the required solution based on technical requirements and actual conditions.

TELEFRANG Plug Types

1) 232-C is a serial physical interface standard developed by the Electronic Industries Alliance EIA (Electronic Industry Association). RS is the abbreviation for "Recommended Standard" in English, 232 is the identification 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 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 stipulates that the driver allows a capacitive load of 2500pF, and 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 over a kilometer, 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 transmission signals to be recovered even beyond a kilometer. RS-485 operates in half-duplex mode, meaning only one node 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 a distributed system, permitting up to 32 drivers and 32 receivers to be connected in parallel.

TELEFRANG Plug Data Exchange Methods

Data Bus (DataBus). It specifies methods for data sharing and exchange in homogeneous and heterogeneous systems within a large integrated application system, serving as a standard for data exchange between systems. It can be used to transmit information between microprocessors and memory, and between microprocessors and input/output interfaces. The width of the data bus is an important indicator determining computer performance. Most microcomputers have data buses that are 32-bit or 64-bit. 1) Business Entity Data Exchange: Each subsystem has a business entity layer in its architectural stratification. The data exchange mechanism establishes a layer transparent to all application systems at the business entity layer. Between subsystems, regardless of the specific technical implementation, sharing and interaction can occur through the business entity layer. This establishes a structure for continuous integration and business expansion between subsystems, thereby realizing a scalable, complete, integrated information system. 2) WebService Data Exchange: This is a Web service standard. Web services provide solutions for sharing and exchanging data between heterogeneous systems and can also be used for data sharing and exchange using unified interface standards in product integration.

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