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- Siemens
- 6SN1118-0NJ01-0AA0
- Closed-Loop Control Unit
- Germany
- 305 × 51 × 127 mm
- 0.8 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 6SN1118-0NJ01-0AA0 is a SIMODRIVE 611 Universal HR single-axis resolver control unit used in CNC drive systems. It processes drive commands and resolver feedback for applications requiring closed-loop motor control. The unit belongs to the HR generation of the SIMODRIVE 611 Universal family and supports speed/torque setpoint operation within a compatible drive configuration. <Cite refs={[“turn212819search23″,”turn212819search0”]}/>
Unlike the NH-series control units intended for encoder-based feedback, the NJ-series variant is associated with resolver feedback. This distinction is important when maintaining an older CNC machine: the replacement control unit must match the feedback device installed on the motor. Changing from a resolver-based control unit to an encoder-based version is not simply a matter of exchanging plug-in boards, because the feedback interface and drive parameters must also be compatible.
In a machine tool, the control unit processes the requested motor operation and the feedback received from the resolver. For example, a feed axis positioning a cutting tool needs the drive system to regulate motor movement according to the CNC command. The 6SN1118-0NJ01-0AA0 performs the relevant single-axis control functions while the associated SIMODRIVE power module supplies power to the motor.
The unit can also be relevant in machinery retrofit and repair work where the existing control architecture uses resolver-equipped motors. Before replacement, engineers should verify the control-unit generation, firmware requirements, resolver connections, and stored drive parameters. The motor, power module, CNC controller, and mechanical transmission all influence the final axis response.
The 6SN1118-0NJ01-0AA0 is a control component rather than a complete servo drive. Its operation depends on the surrounding SIMODRIVE hardware and the correct commissioning of the resolver-based feedback system.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6SN1118-0NJ01-0AA0 |
| Product Family | SIMODRIVE 611 Universal HR |
| Product Type | Single-Axis Resolver Closed-Loop Control Unit |
| Control Configuration | HR |
| Number of Axes | 1 |
| Feedback Type | Resolver |
| Setpoint Configuration | Speed/torque setpoint |
| Installation Type | Plug-in control unit |
| Expansion Capability | Compatible optional modules, subject to configuration |
| Compatible Drive System | SIMODRIVE 611 Universal |
| Typical Application | Resolver-based feed-drive control |
| Dimensions | 305 × 51 × 127 mm |
| Weight | 0.8 kg |
Product Features
- Single-axis closed-loop control: Handles drive-control functions for one configured motor axis.
- Resolver feedback: Supports applications using compatible resolver-equipped motors.
- Speed/torque setpoint processing: Works with the configured drive commands in the SIMODRIVE control architecture.
- SIMODRIVE 611 integration: Fits into the corresponding modular drive system.
- Option-module compatibility: Supports applicable expansion arrangements where the hardware and configuration permit.
- Service and retrofit suitability: Can be considered for replacement work when the original resolver interface and control configuration are retained.
Working Principle
The 6SN1118-0NJ01-0AA0 regulates a connected motor axis using the drive command and resolver feedback available within the SIMODRIVE 611 Universal system.
A typical arrangement is:
CNC Controller → 6SN1118-0NJ01-0AA0 → SIMODRIVE Power Module → Motor → Machine Axis
Motor Resolver → Control Unit → Closed-Loop Drive Regulation
When the CNC controller requests movement, the control unit processes the configured setpoint and uses resolver feedback to assess the motor’s response. The power module supplies the controlled electrical power required by the motor. The resulting movement depends on the drive settings, motor characteristics, resolver signals, and mechanical load.
Resolver feedback is central to selecting this model. A resolver provides rotor-position information through its excitation and output signals, and the control system must interpret those signals using the appropriate interface and configuration. An encoder-based control unit should not be assumed to offer direct replacement compatibility simply because it belongs to the same SIMODRIVE family.
During commissioning, the resolver connection, signal integrity, axis configuration, and control parameters should be checked together. If the motor rotates incorrectly or the measured response does not correspond to the commanded movement, possible causes include wiring errors, incorrect feedback configuration, drive parameter mismatches, or a mechanical transmission problem.
The control unit does not replace the power stage or the CNC controller. It performs the drive-control functions assigned to it within the complete system.
Role in the SIMODRIVE 611 Universal Drive Architecture
The 6SN1118-0NJ01-0AA0 occupies the control position for a resolver-based axis. The CNC controller supplies motion commands, the control unit processes the setpoint and feedback information, and the associated power module operates the motor.
CNC Controller → Resolver Control Unit → Power Module → Motor → Machine Axis
| System Element | Function |
|---|---|
| CNC Controller | Generates motion commands and coordinates machine operation |
| 6SN1118-0NJ01-0AA0 | Processes single-axis resolver-based closed-loop control |
| SIMODRIVE 611 Power Module | Supplies controlled electrical power to the motor |
| Resolver | Provides rotor-position feedback |
| Servo Motor | Produces the required mechanical movement |
| Optional Interface Module | Adds supported terminal or communication functions |
| Drive Parameters | Define the control behavior and feedback configuration |
| Machine Axis | Converts motor rotation into the required linear or rotary movement |
Industrial Applications
| Application | Practical Use |
|---|---|
| CNC Machine Tools | Controlling a resolver-equipped feed axis |
| CNC Milling Machines | Regulating motor movement during programmed machining |
| CNC Turning Machines | Supporting compatible resolver-based drive arrangements |
| Industrial Positioning Systems | Processing feedback for a single controlled axis |
| Machine Tool Maintenance | Replacing a matching control unit in an existing SIMODRIVE installation |
| CNC Retrofit Projects | Retaining resolver feedback where the original drive architecture supports it |
| Automated Production Machinery | Controlling motor movement in compatible single-axis applications |
| Legacy Servo Systems | Maintaining resolver-based drive control with matching hardware and parameters |
Installation and Maintenance
- Verify the complete order number: Confirm 6SN1118-0NJ01-0AA0 and distinguish it from the later 0NJ01-0AA1 variant.
- Confirm resolver compatibility: Check that the motor uses the resolver feedback arrangement supported by the installed control unit.
- Check the axis configuration: Verify that the application requires single-axis resolver control and that the associated power module is suitable.
- Review firmware requirements: Confirm that the control-unit generation matches the installed SIMODRIVE software and commissioning environment.
- Identify optional modules: Check whether the control unit uses terminal or communication expansion and verify compatibility with the intended configuration.
- Isolate the drive system: Follow the machine’s electrical isolation and DC-link discharge procedures before accessing the control unit.
- Inspect resolver wiring: Check connector seating, cable condition, shielding, and signal connections before energizing the drive.
- Back up drive parameters: Save the existing axis configuration and relevant machine data before replacement.
- Inspect the power-module interface: Check the plug-in connection and retaining hardware for damage or contamination.
- Verify motor feedback: Confirm that the resolver signal corresponds to the expected motor response during controlled commissioning.
- Test the axis movement: Check movement direction, response to commands, and fault indications before returning the machine to production.
- Document the replacement: Record the control-unit reference, resolver type, software configuration, and final drive parameters.
Compatible System Components
| Component | Function |
|---|---|
| Siemens 6SN1118-0NJ01-0AA0 | Provides single-axis resolver-based closed-loop control |
| SIMODRIVE 611 Power Module | Supplies controlled power to the connected motor |
| Compatible Resolver Motor | Produces mechanical movement and supplies resolver feedback |
| Motor Resolver | Provides rotor-position information |
| CNC Controller | Generates motion commands and coordinates machine operation |
| SIMODRIVE TERMINALS Option | Adds supported terminal functions |
| SIMODRIVE PROFIBUS-DP Option | Provides compatible communication functions where supported |
| Drive Parameter Data | Defines feedback configuration and axis-control behavior |
| Resolver Cable Assembly | Connects the motor feedback device to the control system |
Recommended Related Models
| Model | Product Type | Typical Application |
|---|---|---|
| Siemens 6SN1118-0NJ01-0AA1 | SIMODRIVE 611 Universal HRS Single-Axis Resolver Control Unit | Comparing the later HRS control-board generation |
| Siemens 6SN1118-1NJ01-0AA0 | SIMODRIVE 611 Universal HR Single-Axis Resolver Positioning Control Unit | Applications requiring the corresponding positioning-control configuration |
| Siemens 6SN1118-1NJ01-0AA1 | SIMODRIVE 611 Universal HRS Single-Axis Resolver Positioning Control Unit | Evaluating the HRS positioning variant |
| Siemens 6SN1118-0NK01-0AA0 | SIMODRIVE 611 Universal HR Two-Axis Resolver Control Unit | Applications requiring resolver feedback across two axes |
| Siemens 6SN1118-0NK01-0AA1 | SIMODRIVE 611 Universal HRS Two-Axis Resolver Control Unit | Comparing the HRS two-axis resolver configuration |
| Siemens 6SN1118-0NH01-0AA0 | SIMODRIVE 611 Universal HR Two-Axis Encoder Control Unit | Evaluating an encoder-based alternative when the feedback architecture permits |
Key Advantages
- Provides single-axis closed-loop control for compatible resolver-based drives.
- Processes speed/torque setpoints within the SIMODRIVE 611 Universal architecture.
- Supports integration with compatible CNC controllers and power modules.
- Fits resolver-based maintenance and retrofit applications where the existing configuration matches.
Technical FAQs
What is the main selection difference between the 6SN1118-0NJ01-0AA0 and the NH-series control units?
The NJ-series model is intended for resolver-based feedback, while the NH-series models are associated with encoder-based configurations. Confirm the installed motor feedback type before selecting a replacement.
Can the 6SN1118-0NJ01-0AA0 control two motor axes?
This model is a single-axis resolver control unit. If the machine requires two independently controlled resolver axes, evaluate a compatible two-axis control unit such as the 6SN1118-0NK-series variant.
What should be checked if the drive reports a resolver-related fault?
Inspect the resolver cable, connector contacts, signal wiring, and feedback configuration. Also check the motor and control-unit compatibility and verify that the drive parameters match the installed resolver arrangement.
Can the 0AA1 variant automatically replace the 0AA0 version?
Do not assume direct interchangeability based on the shared base model. The 0AA1 version belongs to a different control-board generation, so firmware, hardware compatibility, and the applicable machine replacement procedure must be checked before substitution.