PLC | Siemens | 6FC5357-0BB25-0AA0 6FC5 357-0BB25-0AA0 SINUMERIK 840DDE CNC hardware

Product Description: Siemens 6FC5357‑0BB25‑0AA0

The Siemens 6FC5357‑0BB25‑0AA0 is an NCU 572.5 PowerLine module used as the central processor in SINUMERIK 840D and 810D CNC control systems. With a 650 MHz Pentium®‑class processor and 64 MB of system RAM, it executes real‑time motion control, PLC logic, and HMI tasks for multi‑axis machine tools. Integrated NC and PLC memories (3 MB NC, 128 KB PLC) store part programs and user logic, while on‑board PROFIBUS DP provides high‑speed fieldbus communication for I/O, drives, and peripheral devices. Designed for 24 V DC cabinet supply, the unit features passive cooling and is engineered for reliable operation in demanding industrial environments.

Key Features

• High‑speed CPU: 650 MHz PowerLine processor for precise motion and logic execution
• System Memory: 64 MB SDRAM for CNC kernel, PLC, and HMI tasks
• NC / PLC Memory: 3 MB NC program memory, 128 KB PLC work memory
• Fieldbus Interface: Built‑in PROFIBUS DP master/slave port (12 Mbit s max)
• Axes & Spindles: Scalable control—up to 31 axes including spindles with appropriate expansion
• Diagnostics: Extensive onboard self‑monitoring with error and status LEDs
• Software Support: Compatible with SINUMERIK 840D/810D system software V6.x and STEP 7 PLC programming
• Cooling: Passive convection; no integrated fan, reducing maintenance needs
• Mechanics: Compact plug‑in card format for quick replacement and minimal downtime

Technical Specifications

• Processor: 650 MHz PowerLine CPU
• System RAM: 64 MB
• NC Program Memory: 3 MB
• PLC Work Memory: 128 KB
• Integrated Fieldbus: PROFIBUS DP (up to 12 Mbit s)
• Maximum Axes / Spindles: Up to 31 (with expansion)
• Supply Voltage: 24 V DC (19.2 … 28.8 V DC)
• Power Consumption: ≈ 25 W
• Protection Class: IP20 (installed in control cabinet)
• Operating Temperature: 0 °C … +55 °C
• Dimensions (W × H × D): 214 mm × 107 mm × 28 mm (board outline)
• Weight: ≈ 0.7 kg

Application Areas

• Central CNC processor for milling, turning, grinding and multitasking machine tools
• Retrofits or upgrades of SINUMERIK 840D/810D PowerLine control cabinets
• Precision machining centers requiring multi‑axis interpolation and high‑speed cutting
• Production lines with integrated PLC logic, HMI, and distributed I/O via PROFIBUS DP

Advantages

• Powerful Processing: 650 MHz CPU and ample RAM deliver smooth high‑speed machining and fast PLC cycle times.
• Integrated Fieldbus: Native PROFIBUS DP master/slave simplifies wiring and reduces external hardware.
• Scalable Control: Supports expansion up to 31 axes, covering complex multi‑channel machines.
• Robust Design: Passive cooling, wide temperature range, and industrial‑grade components ensure long‑term reliability.
• Unified Platform: Combines NC, PLC, and HMI processing in one compact module, lowering cabinet footprint and maintenance complexity.