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S7-200
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The 6ES7901-3CB30-0XA0 is a mounting rail from Siemens’ SIMATIC S7-300 series, designed as a mechanical and electrical interface base for mounting S7-300 modules in industrial control systems. It serves as a foundational component to securely fasten and electrically interconnect S7-300 modules, ensuring stable operation in automation setups.
Key Features & Specifications:
- Length: Measures 350 mm (approximately 13.8 inches), providing sufficient space to mount a typical combination of S7-300 modules (e.g., a CPU, power supply, and several signal modules) in a compact arrangement.
- Mechanical Design: Constructed from durable metal, the rail features a standardized profile compatible with DIN rail mounting systems, allowing easy installation in control cabinets. Its rigid structure ensures modules remain securely fastened, even in vibration-prone industrial environments.
- Electrical Function: Integrates a built-in backplane bus that establishes electrical connections between mounted S7-300 modules (e.g., CPU, power supply, SM 321/322 I/O modules, or communication modules). This eliminates the need for external wiring between modules, simplifying system assembly and reducing connection errors.
- Compatibility: Specifically designed for SIMATIC S7-300 modules, including:
- S7-300 CPUs (e.g., 312, 314, 315).
- Power supply modules (e.g., PS 307).
- Signal modules (e.g., SM 321 digital inputs, SM 322 digital outputs, SM 331 analog inputs).
- Special function modules (e.g., communication processors).
Integration & Installation:
- Mounting: Installed on standard DIN rails (35 mm) within control cabinets, following industrial mounting practices. Modules are clipped onto the rail, where they automatically engage with the backplane bus for electrical connectivity.
- Scalability: Can be combined with longer rails (e.g., 530 mm or 830 mm) for larger systems, but the 350 mm length is ideal for medium-sized S7-300 configurations.
Industrial Durability:
- Built to withstand typical industrial conditions, including resistance to vibration and mechanical stress, ensuring long-term stability in factory floors, process plants, or machinery enclosures.
Applications:
Essential for assembling S7-300-based automation systems, such as:
- Control cabinets for machinery (e.g., conveyor systems, packaging lines).
- Process control setups requiring a compact arrangement of S7-300 modules.
- Industrial panels where organized, space-efficient mounting of PLC components is critical.
This rail forms the physical and electrical backbone of S7-300 systems, enabling reliable, streamlined integration of modules in industrial automation environments.
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