German WONDERWARE plug WONDERWARE model WONDERWARE price

WONDERWARE 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 multiple line characteristics, especially during long-distance transmission. In serial communication, both communicating parties are required to use a standard interface to enable different devices to connect conveniently 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 a 25-pin DB25 connector, defines the signal content for each pin of the connector, and specifies the voltage levels for various signals.

WONDERWARE Plug Introduction

As automation technology has evolved from standalone machine control to Factory Automation FA, and further 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 underlying field devices. 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 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. 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 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 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.

WONDERWARE Plug Classification

Buses can be divided into five major types according to function and specification: Data Bus (Data Bus): Transmits data that needs to be processed or stored back and forth between the CPU and RAM. Address Bus (Address Bus): Used to specify the address of data stored in RAM (Random Access Memory). Control Bus (Control Bus): Transmits signals from the microprocessor Control Unit (Control Unit) to peripheral devices. Expansion Bus (Expansion Bus): A bus for data communication between external devices and the computer host, such as the ISA bus and PCI bus. Local Bus (Local Bus): Replaces expansion buses for higher-speed data transmission. Among them, the Data Bus DB (Data Bus), Address Bus AB (Address Bus), and Control Bus CB (Control Bus) are collectively referred to as the system bus, which is the bus in the usual sense. In some systems, the data bus and address bus are multiplexed, meaning that the signals appearing on the bus represent data at certain times and addresses at other times; while in other systems, they are separate. The address bus and data bus of the 51 series microcontrollers are multiplexed, whereas the buses in general PC systems are separate. The "Data Bus DB" is used to transmit data information. The data bus is a bidirectional tri-state bus, meaning it can transmit data from the CPU to memory or other components such as the I/O interface, and can also transmit data from other components to the CPU. The bit width of the data bus is an important indicator of a microcomputer and is usually consistent with the word length of the microprocessor. For example, the Intel 8086 microprocessor has a word length of 16 bits, and its data bus width is also 16 bits. It should be pointed out that the meaning of data is broad; it can be actual data, instruction code, or status information, and sometimes even control information. Therefore, in practical work, what is transmitted on the data bus is not necessarily only data in the strict sense.

WONDERWARE Plug Main Parameters

1) Rated Voltage: Rated voltage, also known as operating voltage, mainly depends on the insulating materials used in the connector and the spacing between contact pairs. Certain components or devices may fail to perform their intended functions when operated below their rated voltage. The rated voltage of a connector should effectively be understood as the maximum operating voltage recommended by the manufacturer. In principle, connectors can operate normally at voltages below the rated voltage. The author tends to select the rated voltage reasonably based on the connector's withstand voltage (dielectric strength) specifications, according to the usage environment and safety level requirements. That is to say, with the same withstand voltage specification, different maximum operating voltages can be applied depending on the usage environment and safety requirements. This aligns better with objective usage conditions. 2) Rated Current: Also known as operating current. Like rated voltage, connectors can generally operate normally at currents below the rated current. In the connector design process, thermal design is used to meet the rated current requirements, because when current flows through the contact pair, heat is generated due to conductor resistance and contact resistance. When the heating exceeds a certain limit, it will damage the connector's insulation and cause softening of the contact pair surface plating, leading to failure. Therefore, limiting the rated current effectively means limiting the internal temperature rise of the connector to not exceed the designed specified value. An issue to note during selection is that for multi-core connectors, the rated current must be derated. This deserves more attention in high-current scenarios. For example, for a φ3.5mm contact pair, the rated current is generally specified as 50A, but for 5 cores, it must be derated by 33%, meaning the rated current per core is only 38A. The greater the number of cores, the larger the derating amplitude. 3) Contact Resistance: Contact resistance refers to the resistance generated at the contact interface between two conductive contacts. Two issues should be noted during selection. First, the contact resistance specification of a connector is effectively the contact pair resistance, which includes the contact resistance and the conductor resistance of the contact pair. Since conductor resistance is usually small, the contact pair resistance is often referred to as contact resistance in many technical specifications. Second, in circuits carrying small signals, pay attention to the conditions under which the given contact resistance specification was tested, because oxide layers, oil stains, or other contaminants on the contact surfaces can generate film resistance. As the film thickness increases, the resistance rises rapidly, making the film a poor conductor. However, the film can undergo mechanical breakdown under high contact pressure, or electrical breakdown under high voltage and large current. For some small-volume connectors, the designed contact pressure is quite low, and the usage scenario is only at the mA and mV levels. In such cases, the film resistance is not easily broken down, which may affect signal transmission. One of the contact resistance test methods in GB5095 "Basic Test Procedures and Measurement Methods for Electromechanical Components Used in Electrical Equipment," namely "Contact Resistance - Millivolt Method," stipulates that to prevent breakdown of the insulating film on the contacts, the DC or AC peak value of the open-circuit electromotive force of the test circuit shall not exceed 20mV, and the DC or AC test current shall not exceed 100mA. 4) Shielding: In modern electrical and electronic equipment, the increasing density of components and their interrelated functions impose strict limits on electromagnetic interference. Therefore, connectors are often enclosed in metal housings to prevent internal electromagnetic energy radiation or interference from external electromagnetic fields. At low frequencies, only magnetic materials can provide significant shielding against magnetic fields. In this case, there are certain requirements for the electrical continuity of the metal housing, which corresponds to the housing contact resistance.

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