The Siemens 6ES5135-3KA12 is a 21-slot central controller rack chassis designed for the Simatic S5-135U and S5-155U automation platforms. This rack serves as the primary physical and electrical backplane for housing CPUs, memory modules, and various I/O interface cards, providing a stable infrastructure for complex, multi-processor industrial control systems. It is engineered for high-availability environments, including power generation, heavy manufacturing, and mineral processing, where reliable signal distribution and modular maintenance are critical.

Features

• 21-slot capacity allowing for high-density module integration.
• Passive backplane architecture reduces thermal stress and eliminates active electronic components on the bus board, enhancing long-term reliability.
• Parallel address and data bus paths support high-speed communication between processors and I/O modules.
• Rugged mechanical design provides secure module positioning, structural grounding, and vibration resistance.
• Compatible with S5-135U and S5-155U processor lines for scalable control configurations.

Applications

This controller rack is intended for use in large-scale automation systems requiring centralized processing and extensive I/O capacity. It is commonly deployed in:

• Steel and metal processing production lines.
• Power generation and distribution control centers.
• Large-scale mining and material handling facilities.
• Automated batch processing and chemical manufacturing plants.

Technical Specifications

Installation Guidelines

• Grounding: Connect the rack frame protective earth terminal directly to the cabinet's main ground bus using a minimum 10 mm squared conductor to ensure effective EMI suppression.
• Module Handling: Always de-energize the system before inserting or removing any modules to prevent bus transient errors or damage to the backplane pins.
• Thermal Clearance: Ensure at least 100 mm of vertical space is maintained above and below the chassis to allow for adequate natural convection cooling.
• Environment: Install in a clean, dry environment protected from excessive dust, moisture, and corrosive gases.

FAQ

Is the power supply included with this rack?

No, the 6ES5135-3KA12 is a passive chassis and does not include an integrated power supply. External modular power supplies must be sourced separately to provide the required voltage to the backplane.

Can this rack be used with S5-155U CPUs?

Yes, this chassis is designed to be compatible with both S5-135U and S5-155U processor configurations, provided the system architecture is correctly configured for the specific CPU type.