NPBA-12 3BHL000510P0012 | ABB Bus adapter Module

Description

The Programmable Logic Controller was first introduced in the United States in the late 1960s, when it was called the Programmable Logic Controller (PLC), which was used to replace relays. To perform logical judgment, timing, counting and other sequential control functions. The concept of PLC was proposed by General Motors. The basic design idea of PLC is to combine the advantages of computer function perfect, flexible, universal and relay control system simple and easy to understand, easy to operate, cheap and so on, the controller hardware is standard and universal. According to the actual application object, the control content is compiled into software and written into the user program memory of the controller, so that the connection between the controller and the controlled object is convenient. 2.3 plc features and functions (1) The main characteristics of plc. The characteristics of plc are: reliable work, fast running speed, building block structure, flexible combination, good compatibility, simple programming and generation, rich, strong network function. (2) The main functions of plc. plc system can well complete the industrial real-time sequence control, condition control, counting control, step control and other functions; It can complete analog/digital (a/d), digital/analog (d/a) conversion, data processing, communication networking, real-time monitoring and other functions. Years of practice shows that plc, reliable, is designed for the factory, with reinforced components according to the requirements of the working environment, real-time scanning practice and fault diagnosis function, easy troubleshooting, won the preference of users. What makes a plc so reliable is a real-time core or operating system of executable relay logic, sequential function diagrams, function blocks, structured text, command catalogs, or a combination thereof. In case of failure, the built-in device can maintain mechanical damage and maintain an orderly and predictable sequence. 2.4 The development trend of plc: there are extremely fast logical operations and logic control, sequence control capabilities, reliability in discrete control, convenient and easy to learn programming methods, so that it has an undisputed position in the field of industrial automation based on discrete.

Power unit introduction 1) Rectification bridge Its function is to rectify (turn AC into DC). There are two types of internal package of the rectifier bridge. There are 6 rectifier diodes inside the package, which are used in the three-phase input end of the power unit. There are two rectifier diodes inside the package, which are used in the three-phase input of the power unit and in the bypass circuit. The rectifier bridge voltage levels used are: 1400V, 1800V; 2) Thyristor Thyristor is used in the charging circuit and by-pass circuit to play a "switch" role. The thyristor voltage levels used are: 1400V, 1800V; 3) Electrolytic capacitor Its function is to filter the DC after the rectifier bridge is rectified. The voltage levels used are: 400V. The capacity used is 3300uF, 6800uF, 10000uF. 4) IGBT Its function is to invert (to change DC into AC). Most IGBTs are "dual-tube" (two sets of IGBT modules are encapsulated inside). The IGBT voltage levels used are: 1200V, 1700V; The IGBT current levels used are: 75A, 100A, 150A, 200A, 300A, 400A, etc

Power unit board 1. Unit power supply board Board function: Take power from the DC bus of the power unit and output 24V DC power for the unit control board. Board interface: Input interface: power unit positive and negative DC bus Output interface: 24VDC output, connected to the unit control board 2. Unit control panel The function of the board: 1) receive the signal of the main control system and provide the control signal to the drive board; 2) Conduct real-time fault monitoring and report fault information to the main control system; 3) Supply power to the unit drive board. Board interface: 1) Optical fiber interface for communication with the main control system; 2)24V power input interface: connected with the power board; 3) Driver signal (Top1, Top2, Lock interface: connected with the driver board; 4)15V power output interface: connected with the driver board to supply power to the driver board; 5) Overvoltage, undervoltage detection interface: connected with the positive and negative bus of the unit; 6) Lack of phase detection interface: fuse auxiliary switch; 7) overheating detection interface: connected to the temperature detection switch; 8) Power on thyristor drive signal interface: Connect the thyristor gate; 9) By-pass thyristor driver signal interface: connected to the by-pass thyristor gate; 10) Bypass OK signal detection interface: connected to bypass OK board. 3. Unit drive board Function of the board: receive the control signal of the unit control board, provide driving signal for the four-way IGBT on the unit, and monitor the drive fault and report it to the unit control board. Board interface: 1)15V power input interface: connected to the unit control board; 2) Input signal (Top1, Top2, /Lock) : connected to the unit control board; 3) Output signal (ERRout) : connected to the unit control board; 4) Output signal (TOP1, BOT1, TOP2, BOT2 IGBT driver signal) : connected to the C, G, E pole of TOP1, BOT1, TOP2, BOT2 IGBT respectively. 4. Bypass OK board Board function: After the unit control board sends out the side communication number, the by-pass loop is detected to detect the signal input to the unit control board. Board interface: Input interface: bypass thyristor A, K pole; Output interface: connected to the unit control board

The company focuses on DCS, PLC, robot, large servo four systems

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