Siemens 6FC5311-0AB00-0AA0 | SINUMERIK 840D NCU 571.2 Control Unit

Product Overview
The Siemens 6FC5311-0AB00-0AA0 is an NCU (Numerical Control Unit) module for the SINUMERIK 840D powerline CNC system. The NCU is the central control unit of the 840D system, integrating NC-CPU, PLC functions, and communication capabilities .

This module belongs to the NCU 571.2 series, designed for basic to medium complexity CNC applications .

Technical Specifications

• Model Number: 6FC5311-0AB00-0AA0

• Product Type: NCU (Numerical Control Unit)

• Series: SINUMERIK 840D NCU 571.2 / 561.2 

• Processor: NCU 571.2 series processor 

• User Memory: 256 KB (battery-backed, expandable up to 1.5 MB)

• Channels: Up to 2 channels

• Way Groups: 1 way group

• Axes: Up to 2 axes with interpolation function

• Drive System: SIMODRIVE 611D compatible

• Communication: PROFIBUS-DP interface (X102)

• Panel Interface: MPI interface (X101)

• Additional Interfaces: P/K bus for I/O expansion 

• Battery Backup: Yes (for user memory)

• Software Support: SW4.4 and later versions

Key Features

• Central CNC Control: Integrates NC-CPU and PLC functions in one module 

• Rigid Tapping Support: Available from SW4.4 software version

• Expandable Memory: User memory expandable from 256KB to 1.5MB

• Dual Measurement System Support: Up to 4 measuring systems (2 per axis)

• Compact Design: Fits in 50mm wide NCU Box frame 

• PROFIBUS-DP Ready: For industrial network integration 

SINUMERIK 840D System Integration
The NCU 571.2 is part of the SINUMERIK 840D digital control system, which operates in conjunction with:

• SIMODRIVE 611 digital drive system

• SIMATIC S7 programmable controller 

• PCU 50 for HMI operations

• OP (Operator Panel) for user interface

Typical Applications

• Basic CNC machine tools

• Drilling and milling machines

• Turning centers with limited axes

• Retrofit and upgrade projects for 840D powerline systems

• Applications requiring up to 2 axes of interpolated motion 

Compatibility Notes

• Compatible with SINUMERIK 840D powerline systems (SW4.4 and later)

• Requires NCU Box for installation (e.g., 6FC5247-0AA00-0AA2) 

• Compatible with SIMODRIVE 611D drive modules

• PLC options: PLC 315-DP (standard configuration) 

What's Included

• 6FC5311-0AB00-0AA0 NCU 571.2 module

• Battery (pre-installed)

• No system software included (unless specified)

• 

FAqS