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- Siemens
- 6SN1118-0DK23-0AA0
- Digital Closed-Loop Plug-In Performance Control Unit
- Germany
- 330 × 51 × 127 mm
- 0.9 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 6SN1118-0DK23-0AA0 is a high-performance digital closed-loop control unit in the SIMODRIVE 611-D drive system. It is configured for two-axis control with a direct measuring system, making it suitable for CNC machine tools that require feedback from an additional position-measuring device as part of the drive-control arrangement.
The module handles digital drive-control functions for feed drives and main spindle drives. It works with the numerical control system, associated power electronics, and compatible feedback devices to regulate the assigned axes according to the machine’s configured motion-control strategy.
The direct measuring system is a defining feature of this model. In applications where the position of the machine slide or another mechanical element must be measured independently of the motor encoder, direct feedback can support position control that accounts for mechanical movement beyond the motor itself. The exact feedback arrangement depends on the machine design and its configured measuring system.
The 6SN1118-0DK23-0AA0 is a plug-in control component rather than a complete drive. Its two-axis configuration, measuring-system requirements, encoder interface, and NC software compatibility must be checked when selecting it for an existing SIMODRIVE 611-D installation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model / Article Number | 6SN1118-0DK23-0AA0 |
| Product Family | SIMODRIVE 611-D |
| Product Type | Digital Closed-Loop Plug-In Performance Control Unit |
| Control Performance | High Performance |
| Control Configuration | 2-Axis |
| Drive Applications | Feed Drives and Main Spindle Drives |
| Measuring System | Direct Measuring System |
| Encoder Interface | sin/cos 1 Vpp |
| Setpoint Interface | Digital Speed/Torque Setpoint |
| NC Software Requirement | Version 06.04.09 or later |
| Dimensions | 330 × 51 × 127 mm |
| Weight | 0.9 kg |
Product Features
- Two-axis closed-loop control: Handles control functions for two configured drive axes within the SIMODRIVE 611-D architecture.
- Direct measuring system support: Accommodates a drive configuration that incorporates direct position feedback.
- High-performance digital regulation: Supports demanding CNC motion-control tasks involving feed and spindle drives.
- sin/cos 1 Vpp feedback interface: Supports the specified encoder signal format for compatible measuring devices.
- Digital speed and torque setpoints: Integrates with the digital setpoint architecture used by the associated drive system.
- CNC software integration: Requires an appropriate NC software version and a matching drive configuration.
Working Principle
The 6SN1118-0DK23-0AA0 processes digital drive commands and feedback information within the SIMODRIVE 611-D system. The CNC controller determines the required movement, while the control unit performs the associated closed-loop regulation for the assigned axes.
Its direct measuring system configuration allows the drive arrangement to use position feedback measured directly from the machine’s mechanical movement. This differs from relying exclusively on a motor-mounted encoder, which measures motor rotation and may not capture every mechanical effect between the motor and the machine’s moving element.
The general control path is:
CNC Controller → 6SN1118-0DK23-0AA0 → SIMODRIVE Power Module → Drive Motor → Machine Axis and Measuring System → Position Feedback
During operation, the control system processes the command and feedback signals to regulate drive movement. The motor and power module provide the mechanical motion, while the measuring system reports position information to the configured control loop.
The encoder signal type, measuring-system assignment, and control parameters must match the actual machine architecture. Incorrect feedback configuration can affect position regulation or prevent the drive from entering the intended operating state. For this reason, replacement work should preserve the original axis assignments and measuring-system configuration unless a documented engineering change is being made.
Role in the SIMODRIVE 611-D Control Architecture
The 6SN1118-0DK23-0AA0 occupies the digital drive-control layer between the CNC controller and the drive power electronics. Its defining role is to support high-performance, two-axis closed-loop control in a configuration that includes a direct measuring system.
CNC Controller → Digital Control Unit → Power Module → Motor and Machine Axis → Direct Measuring System → Feedback
| System Element | Function |
|---|---|
| 6SN1118-0DK23-0AA0 | Performs digital closed-loop control functions for two configured axes |
| CNC Controller | Supplies motion commands and coordinates machining operations |
| SIMODRIVE 611-D Power Module | Supplies electrical power to the connected drive motor |
| Feed Drive Motor | Produces controlled movement along a machine axis |
| Main Spindle Drive | Provides spindle motion in a compatible system configuration |
| Direct Measuring System | Measures the relevant mechanical position independently of motor rotation |
| Encoder and Feedback Cabling | Transmit the configured measuring signals to the control system |
| NC Software and Drive Parameters | Define axis assignments, feedback configuration, and operating behavior |
Industrial Applications
| Application | Typical Use |
|---|---|
| CNC Milling Machines | Regulating feed-axis movement using a configured direct measuring system |
| CNC Turning Centers | Coordinating feed and spindle drive functions within the machine’s control architecture |
| Precision Machine Tools | Incorporating direct position feedback into closed-loop motion control |
| Grinding Machines | Supporting configured axis-control arrangements where mechanical position feedback is required |
| Multi-Axis CNC Equipment | Managing two assigned drive axes within a compatible SIMODRIVE 611-D installation |
| Machine Tool Refurbishment | Replacing an existing high-performance control unit while preserving the original feedback architecture |
| CNC Drive Maintenance | Restoring drive-control functions after verifying the control unit, software, and measuring-system configuration |
Installation and Maintenance
- Verify the complete article number: Confirm that the replacement is 6SN1118-0DK23-0AA0. Similar SIMODRIVE 611-D modules may differ in axis count, feedback configuration, or measuring-system support.
- Check the direct measuring system: Establish which measuring device is connected to the machine and confirm that the existing configuration is compatible with this control unit.
- Verify encoder signals: Check that the relevant feedback devices and signal connections match the specified sin/cos 1 Vpp interface.
- Confirm the axis assignment: Review the CNC configuration to determine which two axes are controlled by the module and how their feedback signals are assigned.
- Check NC software compatibility: Verify that the installed NC software meets the requirement of version 06.04.09 or later and supports the intended drive configuration.
- Isolate the drive system: Follow the machine’s electrical safety and lockout procedures before removing or installing the control unit.
- Inspect the mounting position: Check the designated SIMODRIVE slot, connectors, and mating interfaces for damage, contamination, or loose connections.
- Install the module correctly: Fit the control unit into the designated position and ensure that its electrical connections are fully seated.
- Inspect measuring-system wiring: Examine feedback cables and connectors for damaged conductors, incorrect pin assignments, or loose contacts.
- Review drive parameters: Confirm the motor data, axis assignments, measuring-system settings, and control parameters against the machine’s approved configuration.
- Test position feedback: During controlled commissioning, compare the measured machine position with the expected movement and investigate any feedback discrepancies before production use.
- Document maintenance work: Record the installed article number, software version, feedback configuration, parameter changes, and functional test results.
Compatible System Components
| Component | Function |
|---|---|
| SIMODRIVE 611-D Power Module | Supplies controlled electrical power to the associated motor |
| CNC Controller | Coordinates machine movements and generates drive commands |
| Compatible Feed Drive Motor | Produces controlled movement along the assigned machine axis |
| Main Spindle Drive Components | Support spindle operation where included in the configured drive arrangement |
| Direct Measuring System | Supplies direct mechanical-position feedback |
| Compatible sin/cos 1 Vpp Feedback Devices | Provide the specified measuring signals |
| Encoder and Measuring-System Cables | Carry feedback signals to the relevant control interfaces |
| NC Software and Drive Parameters | Establish the operating configuration of the control unit |
Recommended Related Models
| Model | Product Type | Selection Consideration |
|---|---|---|
| Siemens 6SN1118-0DK23-0AA1 | SIMODRIVE 611-D High-Performance Closed-Loop Control Unit | Compare the exact hardware variant and configuration requirements before replacement |
| Siemens 6SN1118-0DK21-0AA0 | SIMODRIVE 611-D Digital High-Performance Closed-Loop Control Unit | Verify measuring-system requirements because the configuration differs |
| Siemens 6SN1118-0DK21-0AA1 | SIMODRIVE 611-D Digital Closed-Loop Plug-In Performance Control Unit | Check the feedback arrangement and complete article number before considering substitution |
| Siemens 6SN1118-0DJ23-0AA0 | SIMODRIVE 611-D High-Performance Closed-Loop Control Unit | A one-axis configuration; confirm the required axis count and measuring-system arrangement |
Key Advantages
- Two-axis high-performance digital closed-loop control.
- Support for a direct measuring system in the configured drive architecture.
- Compatibility with the specified sin/cos 1 Vpp feedback interface.
- Integration with SIMODRIVE 611-D feed and main spindle drive applications.
- Suitable for CNC maintenance and replacement projects where the original hardware and feedback configuration are verified.
Technical FAQs
What distinguishes the 6SN1118-0DK23-0AA0 from the 6SN1118-0DK21-0AA0?
The 6SN1118-0DK23-0AA0 is configured for a direct measuring system, while the DK21 variant has a different measuring-system configuration. The required feedback arrangement should therefore be confirmed before choosing between these models.
Why is direct position feedback relevant to this control unit?
Direct position feedback measures the movement of the relevant machine element rather than relying solely on motor rotation. In a suitable CNC configuration, this allows the control system to account for mechanical movement between the motor and the measured axis.
Which NC software requirement should be checked before installation?
The specified requirement for this model is NC software version 06.04.09 or later. The actual machine configuration and applicable software compatibility should also be verified before commissioning.
Can this unit control three axes because it belongs to the SIMODRIVE 611-D family?
No. This model is specified as a two-axis control unit. The number of controlled axes must match the module’s configuration and the machine’s drive architecture; the broader SIMODRIVE family includes control units with different axis counts.