German PARAT plug PARAT model PARAT price

PARAT plug is a standardized method for exchanging data (data) between computer components, providing data transmission and control logic for various components in a universal way. From another perspective, if the motherboard (Mother Board) is a city, then the bus is like a public bus (bus) in the city, capable of transmitting bits (bit) that operate back and forth along fixed routes. These lines can only be responsible for transmitting one bit at the same time. Therefore, multiple lines must be used simultaneously to send more data, and the number of data items that the bus can transmit simultaneously is called width (width), measured in bits; the greater the bus width, the better the transmission performance. The bus bandwidth (i.e., the total amount of data that can be transmitted per unit time) is: Bus Bandwidth = Frequency × Width (Bytes/sec).

PARAT plug composition

The fieldbus control system consists of three parts: measurement system, control system, and management system, with the hardware and software of the communication part being its most distinctive feature. 1) Fieldbus control system: Its software is an important part of the system. Control system software includes configuration software, maintenance software, simulation software, device software, and monitoring software. First, select development configuration software and control operation human-machine interface software. Through the configuration software, complete the connections between function blocks, select function block parameters, and perform network configuration. During network operation, real-time data collection, data processing, and calculation are performed on the system. Optimize control and logical control alarms, monitoring, display, reports, etc. 2) Fieldbus measurement system: Its characteristics include multi-variable high-performance measurement, enabling measuring instruments to have computing capabilities and other functions. Due to the use of digital signals, it has high resolution, high accuracy, strong anti-interference, and anti-distortion capabilities. It also has status information of instrument equipment, allowing adjustments to the processing process. 3) Equipment management system: It can provide diagnostic information, management information, equipment operating status information (including smart instruments), and equipment manufacturing information provided by manufacturers. For example, Fisher—Rosemoune company launched the AMS management system, which is installed in the main computer to complete management functions, forming a comprehensive management system information library for field devices. Based on this, equipment reliability analysis and predictive maintenance are realized, changing the passive management mode to a predictable management and maintenance mode. The AMS software is based on a T type structure with the field server as the platform, supporting modular, feature-rich application software on the field server to provide users with a graphical interface. 4) Bus system computer service mode: The client/server mode is a popular network computer service mode. The server represents the data source (provider), and the application client represents the data user, which obtains data from the data source and further processes it. The client runs on a PC or workstation. The server runs on a minicomputer or mainframe, using the intelligence, resources, and data of both parties to complete tasks. 5) Database: It can organically and dynamically store large amounts of data and applications, achieving full data sharing and cross-access with high independence. Industrial equipment parameters change continuously during operation, with large data volumes and high real-time requirements for operation and control. Therefore, a distributed and real-time database system with mutual access operations is formed. Mature options on the market include relational databases such as Oracle, sybas, Informix, SQL Server; and real-time databases such as Infoplus, PI, ONSPEC. 6) Network system hardware and software: Network system hardware includes system management hosts, servers, gateways, protocol converters, hubs, user computers, and underlying intelligent instruments. Network system software includes network operating software such as NetWarc, LAN Mangger, Vines, server operating software such as Lunix, os/2, Window NT, application software databases, communication protocols, network management protocols, etc.

PARAT plug features

1) Physical characteristics: Physical characteristics, also known as mechanical characteristics, refer to some characteristics exhibited by components on the bus during physical connection, such as the geometric dimensions, shape, number of pins, and arrangement order of plugs and sockets. 2) Functional characteristics: Functional characteristics refer to the function of each signal line, such as the address bus used to represent address codes. The data bus is used to represent transmitted data, and the control bus represents commands, states, etc., of operations on the bus. 3) Electrical characteristics: Electrical characteristics refer to the signal direction on each signal line and the effective voltage level range representing the signal. Usually, signals sent by the master device (such as CPU) are called output signals (OUT), and signals sent into the master device are called input signals (IN). Usually, data signals and address signals define high level as logic 1 and low level as logic 0. There is no customary convention for control signals, such as WE indicating active low and Ready indicating active high. There is no uniform regulation for the high and low voltage level ranges of different buses, usually consistent with TTL. 4) Timing characteristics: Timing characteristics, also known as logical characteristics, refer to when the signal on each signal line is effective during bus operation. Through this agreement on the timing relationship of effective signals, correct bus operation is ensured. To improve the scalability of computers and the universality of components and devices, except for on-chip buses, various components or devices are connected to the bus in a standardized form, and information transmission on the bus is implemented in a standardized way. These standardized connection forms and operation methods of the bus are collectively referred to as bus standards. Such as ISA, PCI, USB bus standards, etc. Correspondingly, buses adopting these standards are ISA bus, PCI bus, USB bus, etc.

PARAT plug selection factors

PC communication with intelligent devices mostly relies on RS232, RS485, Ethernet, etc., mainly depending on the device's interface specifications. However, RS232 and RS485 can only represent the physical media layer and link layer of communication. To achieve bidirectional data access, one must write communication applications themselves, but most of these programs cannot comply with ISO/OSI specifications, can only achieve relatively single functions, are suitable for single device types, and the program lacks 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 the RS485 network can only be achieved through transit by a "Master (Master)" device. This master device is usually PC, and only one master device is allowed in this 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 solve problems such as bus control, conflict detection, and link maintenance.

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