ABB REF541EM115BAAA 馈线保护装置
The data collection work of the DCS system is mainly carried out through the SCADA interface to meet the requirements of various production process parameters. Compared with other DCS systems, the collection content of DCS systems is more extensive, comprehensive, and reliable. 2. The control logic can achieve automatic operation control functions between industrial on-site equipment through the use of PID algorithm, and develop corresponding operation plans based on real-time fault points, production and automation levels. 3. Process analysis: The DCS system monitors the operating status and working parameter settings of on-site equipment in real-time through various sensors, making predictions for changes involved in the production process, thereby ensuring efficient and stable completion of the production process. 4. Fault diagnosis: The DCS system detects the status of control and executing mechanisms, and provides corresponding functional parameters for the system to timely detect and correctly handle problems when faults occur. 5. Data management: Using network real-time communication technology to collect and process communication information between on-site equipment and personnel.
Large supply of original imported DCS system accessories and PLC system accessories.
Main products: DCS system accessories, robot system accessories, and large servo system spare parts for major brands such as Bentley, Invensys, Woodward, Foxboro, Westinghouse, Ryan, Schneider Modicon, ABB, AB, Siemens, Motorola, GE Fanuc, Yaskawa, Bosch Rexroth, ACSO, YOKOGAWA Yokogawa, Rexroth, etc
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CPU module
The CPU module mainly consists of a microprocessor (CPU chip) and memory. In a PLC control system, the factory CPU module is equivalent to a human brain. It continuously collects input signals, executes user programs, and refreshes the system’s output; Memory is used to store programs and data.
2. I/O module
The input module and output module are abbreviated as I/O modules. They are the eyes, ears, hands, and feet of the system, serving as a bridge between external field devices and CPU modules.
The input module is used to receive and collect input signals, and the switch input module is used to receive slave buttons; Switch input signals from selector switches, digital dial switches, limit switches, proximity switches, photoelectric switches, pressure relays, etc; The analog input module is used to receive continuously changing analog current and voltage signals provided by potentiometers, tachogenerators, and various transmitters.
The switch output module is used to control output devices such as contactors, solenoid valves, electromagnets, indicator lights, digital display devices, and alarm devices, while the analog output module is used to control actuators such as regulating valves and frequency converters.
The working voltage of the CPU module is generally 5V, while the input/output signal voltage of the PLC is generally higher, such as DC 24V and AC 220V. The spike voltage and interference noise introduced from outside may damage the components in the CPU module or prevent the PLC from working properly. In the I/O module, devices such as optocouplers, thyristors, and small relays are used to isolate the internal and external I/O circuits of the PLC. In addition to transmitting signals, the I/O module also has level conversion and isolation functions.
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