German PTR plug PTR model PTR price

PTR 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 either serial communication or parallel communication. Serial communication is widely adopted because it uses fewer lines, has lower costs, 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 the most commonly used serial communication interface. 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 Communication 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.

PTR 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-layer structure: factory management level, workshop monitoring level, and field device level. The fieldbus is the communication network between devices at the bottom layer of the factory. 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 introduced 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.

PTR Plug Types

Common data buses include ISA, EISA, VESA, and PCI. The "Address Bus AB" is dedicated to transmitting addresses. Since addresses can only be transmitted from the CPU to external memory or I/O ports, the address bus is always unidirectional and tri-state, which differs from the data bus. The bit width of the address bus determines the size of the memory space that the CPU can directly address. For example, if the address bus of an 8-bit microcomputer is 16 bits, its maximum addressable space is 2^16=64KB. The address bus of a 16-bit microcomputer (the term "x-bit processor" refers to the number of bits (1, 0) that the microprocessor can process in one clock cycle, i.e., the word length) is 20 bits, and its addressable space is 2^20=1MB. Generally, if the address bus is n bits, the addressable space is 2^n bytes. The "Control Bus CB" is used to transmit control signals and timing signals. Among control signals, some are sent by the microprocessor to memory and I/O interface circuits, such as read/write signals, chip select signals, and interrupt acknowledgment signals; others are fed back to the CPU by other components, such as interrupt request signals, reset signals, bus request signals, and device ready signals. Therefore, the transmission direction of the control bus is determined by the specific control signal, and (information) flow is generally bidirectional. The bit width of the control bus depends on the actual control needs of the system. In practice, the specific configuration of the control bus mainly depends on the CPU. Classified by data transmission method, buses can be divided into serial buses and parallel buses. In serial buses, binary data is sent bit by bit to the destination device through a single data line; parallel buses typically have more than 2 data lines. Common serial buses include SPI, I2C, USB, and RS232. Classified by whether the clock signal is independent, buses can be divided into synchronous and asynchronous buses. The clock signal of a synchronous bus is independent of the data, while the clock signal of an asynchronous bus is extracted from the data. SPI and I2C are synchronous serial buses, while RS232 uses an asynchronous serial bus.

PTR Plug Selection Criteria

Communication between PC and intelligent devices mostly relies on RS232, RS485, Ethernet, and other methods, depending mainly on the device's interface specifications. However, RS232 and RS485 only represent the physical media layer and data link layer of communication. To achieve bidirectional data access, one must write custom communication applications, but most such programs do not comply with ISO/OSI specifications, can only implement relatively simple functions, are suitable for a single device type, and lack universality. In a device network formed by RS232 or RS485 devices, if the number of devices exceeds 2, RS485 must be used as the communication medium. Information exchange between devices in an RS485 network can only be achieved through relay by a "Master (Master)" device. This master device is usually a PC, and only one master device is allowed in such a device network, with all others being Slave (Slave) devices. Fieldbus technology is based on the ISO/OSI model, has a complete software support system, and can resolve issues such as bus control, collision detection, and link maintenance.

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