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- Siemens
- 6SN1118-0NH11-0AA0
- Control Unit
- Germany
- 330 × 51 × 152 mm
- 0.828 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 6SN1118-0NH11-0AA0 is a SIMODRIVE 611 Universal E HR digital closed-loop control unit for two-axis CNC drive applications. It supports incremental encoders with SIN/COS 1 Vpp signals and compatible absolute-value encoders using SIN/COS 1 Vpp or EnDat interfaces. The unit also incorporates a PROFIBUS-DP2 motion-control option for compatible SINUMERIK control systems, making its configuration distinct from standard SIMODRIVE 611 Universal HR control units. <Cite refs={[“turn195579search12″,”turn195579search4″,”turn195579search6”]}/>
In a CNC machine, the control unit processes drive commands and feedback from the connected axes. For example, a machining center may use two feed axes to position a workpiece and cutting tool during a programmed cycle. The CNC controller determines the requested movement, while the control unit handles the associated closed-loop drive functions and works with the power modules to regulate motor operation.
The Universal E configuration is particularly relevant when the machine architecture uses SINUMERIK 802D or 840Di with motion control over PROFIBUS-DP. The integrated option module is a defining part of this order code, so replacement selection should account for the communication arrangement as well as the encoder interface and axis count.
The unit supports two independent drive controls, although single-axis operation is also possible in a compatible configuration. Actual functionality depends on the installed power modules, motor and encoder types, machine software, and parameter settings. A two-axis label alone does not establish compatibility with every motor or CNC system.
When servicing an existing SIMODRIVE installation, verify the complete order number and the installed PROFIBUS-DP arrangement before exchanging the control unit. The memory module and machine parameters also need to be handled according to the applicable replacement procedure to preserve the required axis configuration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6SN1118-0NH11-0AA0 |
| Product Family | SIMODRIVE 611 Universal E HR |
| Product Type | 2-Axis Digital Closed-Loop Control Unit |
| Control Configuration | Universal E HR |
| Number of Axes | 2 |
| Encoder Compatibility | Incremental encoders with SIN/COS 1 Vpp; compatible absolute-value encoders with SIN/COS 1 Vpp or EnDat |
| Setpoint Interface | Speed, rotational-speed, and torque setpoint |
| Communication Interface | PROFIBUS-DP2 motion-control option |
| Compatible CNC Systems | SINUMERIK 802D / 840Di, subject to system configuration |
| Installation Type | Digital plug-in control unit |
| Compatible Drive System | SIMODRIVE 611 Universal E |
| Dimensions | 330 × 51 × 152 mm |
| Weight | 0.828 kg |
Product Features
- Two-axis closed-loop control: Processes drive-control functions for two independent axes in a compatible system.
- Universal E HR configuration: Combines the Universal E architecture with the HR control-board generation.
- Integrated PROFIBUS-DP2 option: Supports the specified motion-control communication arrangement.
- Multiple feedback options: Accommodates compatible SIN/COS 1 Vpp and EnDat encoder configurations.
- Speed and torque setpoint processing: Supports the required drive commands for compatible applications.
- Single-axis operating capability: Can be used in a permitted one-axis configuration where the drive hardware supports it.
- Memory-module-based configuration retention: Supports the established SIMODRIVE replacement and commissioning workflow.
Working Principle
The 6SN1118-0NH11-0AA0 operates as the control unit in a SIMODRIVE 611 Universal E drive system. It receives motion-related commands through the configured CNC and communication architecture, processes encoder feedback, and works with the associated power modules to regulate the connected motor axes.
A typical arrangement is:
SINUMERIK CNC → PROFIBUS-DP2 → 6SN1118-0NH11-0AA0 → SIMODRIVE Power Module → Motor → Machine Axis
Encoder Feedback → Control Unit → Closed-Loop Drive Regulation
During a machining operation, the CNC system issues a movement command and the connected encoder reports motor or position information. The control unit evaluates the configured setpoint and feedback signals to regulate the drive response. The resulting positioning behavior depends on the encoder type, motor characteristics, power-module configuration, and machine parameters.
The PROFIBUS-DP2 option is significant because the control unit is intended for a particular motion-control arrangement rather than serving as a generic communication adapter. The CNC system, bus configuration, and drive setup must be compatible for the unit to function as intended.
Encoder selection also affects commissioning. SIN/COS incremental feedback and EnDat absolute feedback use different signal arrangements and configuration requirements. The installed encoder, wiring, and parameter set must match the supported interface.
If an axis fails to respond after replacement, inspect the PROFIBUS-DP configuration, encoder signals, axis assignment, power-module status, and restored machine parameters. A communication problem can prevent correct drive operation even when the power stage and motor are otherwise functional.
Role in the SIMODRIVE 611 Universal E Drive Architecture
The 6SN1118-0NH11-0AA0 connects the CNC motion-control architecture to the associated drive hardware. Its integrated PROFIBUS-DP2 option supports the specified communication arrangement, while the control unit processes feedback and drive-control functions for the configured axes.
SINUMERIK Controller → PROFIBUS-DP2 → Universal E HR Control Unit → Power Module → Motor
| System Element | Function |
|---|---|
| SINUMERIK 802D / 840Di | Generates motion commands within a compatible CNC architecture |
| PROFIBUS-DP2 Interface | Carries the configured motion-control communication |
| 6SN1118-0NH11-0AA0 | Processes two-axis closed-loop drive-control functions |
| SIMODRIVE 611 Power Module | Supplies controlled electrical power to compatible motors |
| Feed Motor or Spindle Motor | Produces the required mechanical movement |
| SIN/COS 1 Vpp Encoder | Supplies compatible incremental feedback |
| EnDat Absolute Encoder | Provides supported absolute-position information |
| Memory Module | Retains relevant machine and drive configuration data |
| CNC Electrical Cabinet | Houses the control and drive hardware |
Industrial Applications
| Application | Practical Use |
|---|---|
| CNC Machining Centers | Coordinating two configured drive axes during machining cycles |
| CNC Milling Machines | Processing axis feedback in a compatible SINUMERIK-controlled system |
| CNC Turning Machines | Supporting suitable feed-drive configurations |
| SINUMERIK 802D Installations | Integrating drive control with the supported motion-control architecture |
| SINUMERIK 840Di Installations | Connecting compatible CNC motion commands to SIMODRIVE hardware |
| Machine Tool Retrofit Projects | Replacing a control unit where the PROFIBUS-DP and feedback arrangements match |
| Automated Metalworking Equipment | Regulating motor movement through a modular CNC drive system |
| Multi-Axis Production Machinery | Providing two-axis drive control within a larger coordinated machine |
Installation and Maintenance
- Verify the complete order number: Confirm 6SN1118-0NH11-0AA0 and distinguish it from the related NH01 and NH11 variants.
- Check the CNC architecture: Confirm that the intended system supports the Universal E motion-control configuration and the required PROFIBUS-DP2 arrangement.
- Identify the encoder interfaces: Check whether the installed feedback devices use SIN/COS 1 Vpp or a compatible EnDat interface.
- Verify the axis configuration: Confirm the number of active axes, associated power modules, and intended feed-drive or spindle-drive arrangement.
- Inspect the PROFIBUS-DP connection: Check bus wiring, connector seating, addressing, and the configured communication setup.
- Isolate the drive system: Follow the approved electrical isolation and DC-link discharge procedures before removing or installing the control unit.
- Handle the memory module correctly: Follow the applicable Siemens replacement procedure when transferring or restoring machine data.
- Inspect encoder cables: Look for damaged insulation, loose contacts, incorrect pin assignments, and other faults that could affect feedback signals.
- Back up the machine parameters: Preserve the existing axis configuration and relevant drive settings before replacement.
- Verify software compatibility: Check the CNC and commissioning-tool versions against the requirements of the installed Universal E system.
- Test communication and axis response: Confirm that the bus connection is operational and that the configured axes respond correctly under controlled commissioning conditions.
- Record the final configuration: Document the order number, encoder types, PROFIBUS-DP settings, software versions, and commissioning results.
Compatible System Components
| Component | Function |
|---|---|
| Siemens 6SN1118-0NH11-0AA0 | Provides two-axis Universal E HR closed-loop control |
| SINUMERIK 802D | Supplies CNC commands in compatible configurations |
| SINUMERIK 840Di | Provides CNC and motion-control functions in compatible installations |
| PROFIBUS-DP Network | Carries the configured motion-control communication |
| SIMODRIVE 611 Power Modules | Supply controlled power to the connected motors |
| Compatible Feed Motors | Produce movement for configured feed axes |
| Compatible Spindle Motors | Support suitable spindle-drive configurations |
| SIN/COS 1 Vpp Encoders | Supply compatible incremental feedback |
| EnDat Absolute Encoders | Provide supported absolute-position feedback |
| SIMODRIVE Memory Module | Retains the relevant machine and drive data |
Recommended Related Models
| Model | Product Type | Typical Application |
|---|---|---|
| Siemens 6SN1118-0NH11-0AA1 | SIMODRIVE 611 Universal E HRS 2-Axis Control Unit | Comparing the related higher-performance control-board generation |
| Siemens 6SN1118-0NH01-0AA0 | SIMODRIVE 611 Universal HR 2-Axis Control Unit | Applications using the standard Universal HR configuration |
| Siemens 6SN1118-0NH01-0AA1 | SIMODRIVE 611 Universal HRS 2-Axis Control Unit | Evaluating the HRS control-board generation for compatible systems |
| Siemens 6SN1118-1NH01-0AA1 | SIMODRIVE 611 Universal HRS 2-Axis Positioning Control Unit | Applications requiring the corresponding positioning-control configuration |
| Siemens 6SN1118-0NK01-0AA1 | SIMODRIVE 611 Universal HRS 2-Axis Resolver Control Unit | Drive systems using compatible resolver feedback |
| Siemens 6SN1114-0NB01-0AA0 | SIMODRIVE 611 PROFIBUS-DP2 Option Module | Reviewing the corresponding communication option within the SIMODRIVE family |
Key Advantages
- Supports two independent drive-control axes.
- Combines Universal E HR control with the specified PROFIBUS-DP2 option.
- Accommodates compatible SIN/COS 1 Vpp and EnDat feedback arrangements.
- Integrates with compatible SINUMERIK and SIMODRIVE 611 hardware.
- Supports established drive-parameter and memory-module commissioning workflows.
Technical FAQs
What distinguishes the NH11-0AA0 configuration from the NH01-0AA0?
The NH11-0AA0 is the Universal E HR version associated with the integrated PROFIBUS-DP2 motion-control option, whereas the NH01-0AA0 belongs to the standard Universal HR configuration. The CNC communication architecture must match the selected control unit.
Which encoder signals are supported by this control unit?
The unit supports incremental encoders with SIN/COS 1 Vpp signals and compatible absolute-value encoders using SIN/COS 1 Vpp or EnDat interfaces. Confirm the exact encoder and wiring arrangement against the machine’s configured feedback system.
Why is the PROFIBUS-DP2 option relevant during replacement?
The option is part of the unit’s intended motion-control arrangement. A replacement must preserve the required bus communication and CNC integration; matching only the two-axis designation is insufficient.
What needs attention when transferring the control unit to another machine?
Check the encoder type, bus configuration, drive parameters, memory-module data, power-module compatibility, and CNC software. Parameters from another machine should not be assumed suitable without verifying the complete axis and motor configuration.