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The PLC host comprises a CPU, memory (EPROM and RAM), input/output units, peripheral I/O interfaces, communication interfaces, and a power supply. Building upon traditional sequential controllers, the PLC control system integrates microelectronics, computer, automatic control, and communication technologies, giving rise to a new generation of industrial control devices. Its purpose is to replace relay‑based logic, timing, counting, and other sequential control functions, thereby establishing a flexible, remote‑control system.
Electrical control cabinets assemble switching devices, measuring instruments, protective relays, and auxiliary equipment within enclosed or semi-enclosed metal enclosures or panels, in accordance with electrical wiring requirements. Their layout must ensure normal operation of the power system, facilitate maintenance, and safeguard both personnel and surrounding equipment. An energy management system is an information‑based control platform designed to help industrial enterprises expand production while optimizing energy planning and utilization, reducing energy consumption per unit of output, improving economic efficiency, and lowering CO2 emissions. A single‑chip PLC integrates all these components within a single housing. In contrast, modular PLCs consist of individually packaged units called modules, which are mounted on racks and interconnected via cables. These modules communicate with the central processor through power buses, control buses, address buses, and data buses, enabling the construction of diverse PLC control systems that interface with various external devices depending on the specific application. Common external devices include programmers, EPROM writers, and similar equipment. Additionally, PLC communication modules can be configured to enable communication with host computers and other PLCs, supporting the implementation of distributed PLC control systems.
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Jiangsu Chengye Tools Co., Ltd.
Address: Next door to the east of the Maojiagang Border Police Station, Lüsi Town, Qidong City, Jiangsu Province.
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