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- Siemens
- 6SN1118-0NK01-0AA0
- 2-Axis Control Unit
- Germany
- 356 × 51 × 178 mm
- 0.8 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 6SN1118-0NK01-0AA0 is a SIMODRIVE 611 universal HR two-axis closed-loop control unit for resolver-based motor feedback. It supports speed and torque setpoint control and can be expanded with compatible option modules. Within a SIMODRIVE 611 drive system, the control unit processes drive commands and feedback information for two compatible axes, allowing coordinated motor control within industrial machinery.
In a CNC machine tool, two independently controlled feed axes may need to respond to commands from the machine controller while maintaining their respective motor feedback loops. This module supports that arrangement through its two-axis control architecture. The controller supplies the required setpoints, the associated power modules drive the motors, and resolver feedback contributes to the closed-loop regulation process.
The 6SN1118-0NK01-0AA0 is intended for compatible resolver-equipped motors and is associated with the SIMODRIVE 611 universal HR control-unit generation. It can be evaluated for machine-tool feed drives, industrial positioning mechanisms, and other equipment that requires two-axis speed or torque control. Actual suitability depends on the motor type, power-module configuration, feedback wiring, and required control functions.
The two-axis configuration distinguishes this model from the single-axis 6SN1118-0NJ01 series. Although both use resolver feedback, they serve different axis-count requirements. Selection should therefore account for the number of controlled axes and the complete drive-system configuration rather than relying on family similarity alone.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model / Article Number | 6SN1118-0NK01-0AA0 |
| Product Family | SIMODRIVE 611 universal HR |
| Product Type | 2-Axis Closed-Loop Control Unit |
| Module Configuration | Two axes |
| Feedback Type | Resolver |
| Control Function | Speed / Torque Setpoint Control |
| Drive System | SIMODRIVE 611 |
| Expansion Capability | Compatible optional interface modules |
| Supported Motor Families | Selected compatible Siemens motor configurations, including 1FT6, 1FK, 1FE1, 1FW6, 2SP1, 1PH, 1PM6, and 1FN |
| Optional Communication | PROFIBUS DP and other supported interfaces, depending on configuration |
| Engineering and Commissioning | Compatible SIMODRIVE configuration and commissioning tools |
| Dimensions | 356 × 51 × 178 mm |
| Weight | 0.8 kg |
Product Features
- Two-axis closed-loop control: Supports control of two compatible drive axes within the SIMODRIVE 611 architecture.
- Resolver feedback compatibility: Processes feedback from supported resolver-equipped motor configurations.
- Speed and torque setpoint control: Supports the specified operating mode for the connected axes.
- SIMODRIVE 611 integration: Fits into the associated drive-converter system.
- Optional interface expansion: Allows supported communication or connection options to be incorporated where required.
- Independent axis control: Supports separate drive-control channels for compatible motor arrangements.
- Machine-tool integration: Suitable for evaluating within existing feed-drive and industrial motion-control systems.
- Configuration-specific compatibility: Requires matching the control unit to the motor, power modules, feedback devices, and required functions.
Working Principle
The 6SN1118-0NK01-0AA0 operates as the control element in a two-axis closed-loop drive arrangement. It receives the required setpoints and processes resolver feedback from compatible motors. The associated power modules supply the electrical power required to operate the motors, while the control unit regulates their response according to the configured control strategy.
A typical system follows this arrangement:
Machine Controller → Setpoint Commands → 6SN1118-0NK01-0AA0 → Power Modules → Motors
Motor Resolvers → Feedback Signals → 6SN1118-0NK01-0AA0
For example, a machine tool may use two feed axes to coordinate the movement of a workpiece and a tool assembly. The machine controller issues the required commands, while the drive system uses resolver feedback to regulate the corresponding motors. The control unit supports the two-axis control process, but the final motion performance also depends on the mechanical transmission, motor characteristics, power stages, and parameter settings.
Resolver compatibility is central to correct operation. The resolver and its associated wiring must match the supported feedback arrangement. A control unit intended for resolver feedback should not automatically be substituted with a version intended for sin/cos incremental encoders or other feedback technologies.
The module is not a standalone power converter. It relies on compatible SIMODRIVE power modules, motors, feedback connections, and a correctly configured higher-level control interface. Optional communication modules may be used where the installation requires additional supported interfaces.
Role in the SIMODRIVE 611 Control Architecture
The 6SN1118-0NK01-0AA0 occupies the closed-loop control layer of the drive system. It processes the setpoints and feedback information for two axes, while the associated power modules drive the motors and the machine controller coordinates the overall movement sequence.
Machine Controller → Setpoint Interface → 6SN1118-0NK01-0AA0 → Power Modules → Motors
Motor Resolvers → Feedback Connections → Control Unit
| System Component | Function |
|---|---|
| 6SN1118-0NK01-0AA0 | Provides two-axis resolver-based closed-loop control |
| SIMODRIVE 611 Power Modules | Supply the connected motors |
| Compatible Siemens Motors | Produce the required mechanical movement |
| Motor Resolvers | Provide feedback for the control loops |
| Machine Controller | Coordinates the axis commands and machine sequence |
| Setpoint Interface | Transfers speed or torque commands |
| Optional Interface Module | Adds supported communication functionality |
| Motor Power Cables | Connect the motors to their power stages |
| Resolver Cables | Carry feedback signals to the control unit |
| Commissioning Tools | Support parameterization and drive-system testing |
Industrial Applications
| Application | Typical Use |
|---|---|
| CNC Machine Tools | Coordinating two resolver-based feed axes |
| Machine-Tool Feed Drives | Regulating two compatible motor-driven mechanisms |
| Industrial Positioning Systems | Controlling two axes within a larger motion system |
| Metalworking Machinery | Supporting coordinated feed movements |
| Automated Production Equipment | Integrating two controlled axes into a machine sequence |
| Material Processing Machinery | Regulating compatible motor-driven mechanisms |
| Industrial Motion-Control Cabinets | Providing two-axis drive-control functionality |
| Machine Rebuilding Projects | Replacing a control unit after compatibility verification |
| Legacy SIMODRIVE Installations | Maintaining compatible resolver-based drive configurations |
| Multi-Axis Drive Systems | Supporting two axes within a wider machine-control architecture |
Installation and Maintenance
- Verify the complete order number: Confirm 6SN1118-0NK01-0AA0 and distinguish it from related two-axis positioning modules and later hardware variants.
- Check the drive-system configuration: Confirm that the installed SIMODRIVE 611 system supports the intended universal HR control unit.
- Verify both motor configurations: Check the motor type and feedback arrangement for each axis against the control unit’s supported configuration.
- Confirm power-module compatibility: Ensure that the associated power stages are suitable for the connected motors and required operating conditions.
- Isolate the drive system: Follow the prescribed electrical safety procedure and verify that hazardous energy has been removed before accessing the equipment.
- Inspect the feedback connections: Check both resolver circuits, connectors, and cables for damage, loose connections, or incorrect assignment.
- Review optional interfaces: Confirm whether additional communication or terminal modules are required and verify their compatibility with the installed configuration.
- Check the control parameters: Verify motor data, setpoint scaling, and control settings for both axes before enabling operation.
- Test feedback independently: During controlled commissioning, confirm that each resolver signal is detected correctly and corresponds to the appropriate motor.
- Verify axis assignment: Ensure that each command and feedback channel is associated with the intended axis in the machine-control configuration.
- Investigate abnormal operation: If either axis behaves unexpectedly, inspect the corresponding feedback circuit, setpoint interface, power module, motor data, and parameter settings.
- Document the completed setup: Record the control-unit reference, motor assignments, feedback connections, option modules, parameter set, and commissioning results.
Compatible System Components
| Component | Function |
|---|---|
| Siemens SIMODRIVE 611 Power Modules | Supply electrical power to the connected motors |
| Compatible Siemens Resolver-Based Motors | Provide mechanical movement and resolver feedback |
| Motor Resolvers | Supply feedback for closed-loop regulation |
| Resolver Feedback Cables | Connect the motor feedback devices to the control unit |
| Motor Power Cables | Connect each motor to its power module |
| Higher-Level Machine Controller | Coordinates the two axes and overall machine sequence |
| Compatible PROFIBUS Option | Supports communication where required by the system configuration |
| Compatible Terminal Option | Provides supported connection functionality where specified |
| SIMODRIVE Commissioning Tools | Support drive parameterization and troubleshooting |
| Drive-System Documentation | Defines the approved component combinations and setup procedure |
Recommended Related Models
| Model | Product Type | Typical Application |
|---|---|---|
| Siemens 6SN1118-0NK01-0AA0 | 2-Axis Closed-Loop Control Unit | Two-axis resolver-feedback speed/torque control |
| Siemens 6SN1118-0NK01-0AA1 | 2-Axis Closed-Loop Control Module | Related two-axis resolver-control configuration |
| Siemens 6SN1118-0NK01-0AA2 | 2-Axis Control-Loop Block | HRS2 two-axis resolver-control configuration |
| Siemens 6SN1118-1NK01-0AA1 | 2-Axis Positioning Control Module | Two-axis resolver-based positioning |
| Siemens 6SN1118-0NH01-0AA0 | 2-Axis Closed-Loop Control Unit | Two-axis control using compatible sin/cos or TTL encoder feedback |
| Siemens 6SN1118-0NJ01-0AA0 | 1-Axis Closed-Loop Control Unit | Single-axis resolver-feedback speed/torque control |
Key Advantages
- Provides closed-loop control for two compatible resolver-based drive axes.
- Supports speed and torque setpoint control within the SIMODRIVE 611 architecture.
- Processes motor feedback as part of the drive-control process.
- Supports compatible interface expansion where required.
- Allows two axes to be managed within a coordinated machine-control system.
- Supports maintenance of existing drive installations when the complete configuration is verified.
Technical FAQs
What is the main difference between the 6SN1118-0NK01-0AA0 and the 6SN1118-0NJ01-0AA0?
The 6SN1118-0NK01-0AA0 is a two-axis resolver-based control unit, whereas the 6SN1118-0NJ01-0AA0 is configured for one resolver-based axis. The required number of controlled axes is a key selection criterion.
Can the two axes use different motor feedback technologies?
The module is specified for resolver-based feedback. Do not assume that one axis can use a different encoder technology without confirming the supported configuration and associated interface requirements.
What should be checked when integrating the control unit with two power modules?
Verify the drive-system architecture, motor ratings, feedback wiring, axis assignments, and control parameters. Confirm that each motor and power module combination is compatible with the intended control configuration before commissioning.
Why might one axis operate correctly while the other does not?
Possible causes include incorrect channel assignment, a faulty resolver cable, mismatched motor parameters, a setpoint configuration error, or an issue with the associated power module. Check the affected axis’s complete signal and power path independently.