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- Siemens
- 6SN1118-0NH11-0AA1
- 2-Axis Digital Closed-Loop Control Plug-In Unit
- Germany
- 330 × 51 × 152 mm
- 0.55 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 6SN1118-0NH11-0AA1 is a SIMODRIVE 611 Universal E HRS two-axis digital closed-loop control plug-in unit used in CNC machine tools with compatible SINUMERIK motion-control systems. It processes drive commands and encoder feedback for configured motor axes and incorporates the Universal E architecture for motion control over PROFIBUS-DP. The associated motion-control option, 6SN1114-0NB01-0AA0, is required for the specified PROFIBUS-DP configuration.
In a CNC machining center, the control unit connects the machine’s motion commands with the drive hardware responsible for moving the axes. When a milling machine positions its table and cutting tool along a programmed path, the CNC controller coordinates the required movement while the control unit processes drive information and feedback. The connected power modules then supply the electrical energy needed by the motors.
The NH11-0AA1 variant belongs to the HRS generation of the SIMODRIVE 611 Universal E control range. Compared with the earlier NH11-0AA0 version, the HRS configuration has different control-board hardware and software requirements. This distinction matters when servicing an existing machine because a replacement must match the CNC architecture, feedback arrangement, option module, and supported software version.
For example, a production machine using SINUMERIK 802D with motion control over PROFIBUS-DP needs a compatible drive-control configuration to coordinate its axes. The 6SN1118-0NH11-0AA1 can serve this function when the complete system meets the relevant hardware and software requirements. Its two-axis capability supports the configured drive arrangement, but motor compatibility and actual motion performance depend on the associated power modules, encoders, parameters, and mechanical transmission.
When replacing this unit, verify the installed PROFIBUS-DP option and the machine’s memory-module configuration before removing the original control board. The control unit is not a standalone drive: its operation depends on the correct combination of CNC software, feedback devices, power modules, and commissioning data.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6SN1118-0NH11-0AA1 |
| Product Family | SIMODRIVE 611 Universal E |
| Product Type | 2-Axis Digital Closed-Loop Control Plug-In Unit |
| Control Configuration | Universal E HRS |
| Number of Axes | 2 |
| Encoder Compatibility | Incremental encoders with SIN/COS 1 Vpp and compatible absolute-value encoders with EnDat |
| Setpoint Interface | Digital speed/torque setpoint |
| Communication Interface | PROFIBUS-DP motion-control configuration |
| Required Option Module | 6SN1114-0NB01-0AA0 |
| Compatible CNC Systems | Supported SINUMERIK configurations, including applicable 802D systems |
| Software Requirement | SIMODRIVE Universal software compatible with the HRS control generation |
| Installation Type | Digital plug-in control unit |
| Compatible Drive System | SIMODRIVE 611 Universal E |
| Dimensions | 330 × 51 × 152 mm |
| Weight | 0.55 kg |
Product Features
- Two-axis digital control: Processes closed-loop drive functions for two configured axes within the compatible SIMODRIVE system.
- Universal E HRS architecture: Combines the Universal E motion-control arrangement with the HRS control-board generation.
- PROFIBUS-DP motion control: Supports communication with compatible CNC systems through the required option module.
- Encoder-based feedback: Accepts supported SIN/COS 1 Vpp and EnDat encoder configurations.
- Digital setpoint processing: Handles the configured speed and torque commands for supported drive applications.
- Memory-module configuration: Works with the SIMODRIVE parameter and user-data storage arrangement used during commissioning and replacement.
- CNC integration: Connects the machine controller’s motion commands with the corresponding drive hardware.
Working Principle
The 6SN1118-0NH11-0AA1 processes drive commands and feedback within the SIMODRIVE 611 Universal E architecture. The CNC controller supplies motion instructions through the configured communication system, while the control unit manages the corresponding drive-control functions and works with the power modules to operate the connected motors.
A typical arrangement is:
SINUMERIK CNC → PROFIBUS-DP → 6SN1118-0NH11-0AA1 → SIMODRIVE Power Module → Motor → Machine Axis
Encoder Feedback → Control Unit → Closed-Loop Drive Regulation
During machining, the CNC controller requests a movement and the encoder supplies feedback about the motor or measured position. The control unit processes the configured setpoint and feedback information so that the drive can regulate the motor’s response. Actual positioning depends on the encoder arrangement, motor characteristics, drive parameters, and mechanical transmission.
The Universal E configuration is especially relevant where the CNC and drive exchange motion-control information over PROFIBUS-DP. The required communication option must be installed and configured correctly; the control unit’s two-axis capability alone does not establish that it can communicate with every CNC controller.
Encoder selection is another important part of the arrangement. SIN/COS incremental feedback and EnDat absolute feedback use different signal and configuration requirements. The encoder, wiring, control-unit interface, and parameter settings must match the selected feedback method.
If an axis fails to follow its command after a control-unit replacement, check the PROFIBUS-DP connection, encoder signals, axis assignment, power-module status, and restored machine parameters. A communication or configuration fault can prevent the motor from responding correctly even when the motor and power stage are functional.
Role in the SIMODRIVE 611 Universal E Drive Architecture
The 6SN1118-0NH11-0AA1 occupies the drive-control layer between the CNC motion-control system and the associated motor power hardware. Its Universal E configuration supports the specified PROFIBUS-DP arrangement, while its closed-loop functions process the feedback and commands associated with the configured axes.
SINUMERIK Controller → PROFIBUS-DP Option → Universal E HRS Control Unit → Power Module → Motor
| System Element | Function |
|---|---|
| SINUMERIK CNC Controller | Generates motion commands and coordinates machining operations |
| PROFIBUS-DP Network | Carries the configured motion-control communication |
| 6SN1118-0NH11-0AA1 | Processes two-axis digital closed-loop drive-control functions |
| 6SN1114-0NB01-0AA0 Option Module | Provides the required motion-control interface for the specified configuration |
| SIMODRIVE 611 Power Module | Supplies controlled electrical power to compatible motors |
| Feed Motor or Spindle Motor | Produces the mechanical movement required by the machine |
| SIN/COS 1 Vpp Encoder | Supplies compatible incremental feedback signals |
| EnDat Absolute Encoder | Provides supported absolute-position feedback |
| Memory Module | Stores relevant drive software and user configuration data |
| CNC Electrical Cabinet | Houses the control and drive hardware |
Industrial Applications
| Application | Practical Use |
|---|---|
| CNC Machining Centers | Coordinating configured feed axes during programmed machining cycles |
| CNC Milling Machines | Processing motion commands in compatible SINUMERIK-controlled systems |
| CNC Turning Machines | Supporting suitable feed-drive arrangements |
| SINUMERIK 802D Installations | Connecting CNC motion control to compatible SIMODRIVE hardware |
| SINUMERIK 840Di Installations | Supporting applicable CNC and drive-control configurations |
| Machine Tool Retrofit Projects | Replacing an HRS control unit where the communication and feedback architecture match |
| Automated Metalworking Equipment | Regulating motor movement through a modular CNC drive system |
| Multi-Axis Production Machinery | Providing two-axis control within a larger coordinated machine architecture |
Installation and Maintenance
- Verify the complete order number: Confirm 6SN1118-0NH11-0AA1 and distinguish it from the NH11-0AA0 and standard NH01 variants.
- Check the CNC architecture: Confirm that the installed controller supports the intended SIMODRIVE Universal E motion-control arrangement.
- Verify the required option module: Check that the PROFIBUS-DP motion-control option 6SN1114-0NB01-0AA0 is present where required by the configuration.
- Identify the encoder type: Determine whether the connected feedback devices use SIN/COS 1 Vpp signals or a compatible EnDat interface.
- Review software compatibility: Confirm that the control-unit generation, drive software, and commissioning tools support the installed configuration.
- Isolate the drive system: Follow the approved electrical isolation and DC-link discharge procedures before removing or installing the control unit.
- Inspect the bus connections: Check PROFIBUS-DP cabling, connectors, addressing, and communication configuration for faults.
- Handle the memory module correctly: Follow the established replacement procedure when transferring or restoring drive software and user data.
- Inspect encoder wiring: Check connector seating, cable condition, signal assignments, and possible interference affecting feedback signals.
- Back up existing parameters: Preserve the axis configuration, feedback settings, and relevant drive data before replacement.
- Test communication and axis response: Confirm that the CNC communication is operational and verify the configured axes under controlled commissioning conditions.
- Record the final configuration: Document the control-unit reference, option module, encoder types, software versions, parameter settings, and commissioning results.
Compatible System Components
| Component | Function |
|---|---|
| Siemens 6SN1118-0NH11-0AA1 | Provides two-axis Universal E HRS digital closed-loop control |
| Siemens 6SN1114-0NB01-0AA0 | Supplies the required PROFIBUS-DP motion-control option |
| SINUMERIK 802D | Provides CNC motion commands in compatible configurations |
| SINUMERIK 840Di | Supports applicable CNC and motion-control arrangements |
| PROFIBUS-DP Network | Carries configured communication between the CNC and drive system |
| SIMODRIVE 611 Power Modules | Supply controlled electrical power to compatible motors |
| Compatible Feed Motors | Produce movement for configured feed axes |
| Compatible Spindle Motors | Support suitable spindle-drive arrangements |
| SIN/COS 1 Vpp Encoders | Supply compatible incremental feedback |
| EnDat Absolute Encoders | Provide supported absolute-position feedback |
| SIMODRIVE Memory Module | Stores relevant software and drive configuration data |
Recommended Related Models
| Model | Product Type | Typical Application |
|---|---|---|
| Siemens 6SN1118-0NH11-0AA0 | SIMODRIVE 611 Universal E HR 2-Axis Control Unit | Comparing the earlier HR-generation Universal E configuration |
| Siemens 6SN1118-0NH01-0AA1 | SIMODRIVE 611 Universal HRS 2-Axis Control Unit | Evaluating the related HRS control configuration without the Universal E designation |
| Siemens 6SN1118-0NH01-0AA0 | SIMODRIVE 611 Universal HR 2-Axis Control Unit | Comparing the standard Universal HR configuration |
| Siemens 6SN1118-0NK01-0AA1 | SIMODRIVE 611 Universal HRS 2-Axis Resolver Control Unit | Evaluating a related control arrangement for compatible resolver feedback |
| Siemens 6SN1118-1NH01-0AA1 | SIMODRIVE 611 Universal HRS 2-Axis Positioning Control Unit | Reviewing a positioning-control configuration for compatible drive systems |
| Siemens 6SN1114-0NB01-0AA0 | SIMODRIVE 611 PROFIBUS-DP Motion-Control Option Module | Providing the required communication option for the Universal E configuration |
Key Advantages
- Supports two-axis digital closed-loop control within the SIMODRIVE 611 Universal E system.
- Accommodates compatible SIN/COS 1 Vpp and EnDat feedback arrangements.
- Supports CNC motion control through the specified PROFIBUS-DP option.
- Integrates with compatible SINUMERIK controllers and SIMODRIVE power modules.
- Uses the established SIMODRIVE software and memory-module configuration approach.
Technical FAQs
What distinguishes the 6SN1118-0NH11-0AA1 from the 6SN1118-0NH11-0AA0?
The 0AA1 version belongs to the HRS control-board generation, while the 0AA0 version is the earlier HR generation. Their software requirements differ, so replacement selection must account for the installed CNC software, drive configuration, and applicable hardware replacement procedure.
Is the PROFIBUS-DP option included in the control-unit reference?
The NH11-0AA1 Universal E configuration requires the associated motion-control option 6SN1114-0NB01-0AA0. Verify that the option module and CNC communication setup match the intended installation.
Which feedback devices can be used with this unit?
The supported arrangement includes incremental SIN/COS 1 Vpp encoders and compatible absolute-value encoders using EnDat. The encoder interface, wiring, and configured drive parameters must correspond to the actual feedback device.
What should be investigated if the CNC communicates with the drive but an axis does not move correctly?
Check the axis assignment, drive parameters, encoder feedback, power-module status, and motor connections. Also verify that the required PROFIBUS-DP option is correctly configured and that the machine’s drive data matches the installed control-unit generation.