Siemens 6SN1123-1AB00-0AA1 SIMODRIVE 611 2-Axis 15A LT Module
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Product Information
The Siemens 6SN1123-1AB00-0AA1 is a 2-axis power module, designated as an LT module, within the modular SIMODRIVE 611 drive platform. Engineered as a high-performance power stage for multi-axis CNC machine tool positioning and industrial motion control, this module executes power conversion for feedrate axes and main spindle drives. It features a transistor current rating of 15 A and delivers a continuous rated output current of 5 A per axis. Utilizing an internal heat dissipation cooling system, the unit manages thermal losses within standard control cabinets without requiring external cutout heatsinks. Operating from an AC supply voltage range of 380 V AC to 480 V AC, it outputs a sine-modulated DC voltage from 0 V DC to 600 V DC to drive synchronous servo, torque, linear, and induction spindle motors.
Physical integration within a drive lineup relies on solid copper DC link busbars and internal equipment bus ribbon connectors that link adjacent modules and infeed/regenerative power supply units. The architecture of the SIMODRIVE 611 system functionally separates the power conversion electronics from the control intelligence. Operational parameters, motor configuration profiles, software settings, and fieldbus communication protocols reside entirely on a removable SIMODRIVE 611 control unit plugged directly into the front slot of the module. Replacing a defective power stage involves transferring the existing control board onto the replacement 6SN1123-1AB00-0AA1 hardware, eliminating the need for parameter re-commissioning. ABC Industrial Parts supports maintenance teams requiring replacement power modules and tested exchange units to restore critical production equipment.
Status monitoring, diagnostic feedback, and fault indications pass through the attached control unit plugged into the module face rather than dedicated display LEDs on the power chassis itself. Commissioning setup and drive status checks are performed using SimoCom U or SinuCom software connected through the plugged-in control card interface. When troubleshooting drive issues, maintenance line checks should start by measuring incoming AC line voltage, inspecting DC link busbar mounting tightness, checking equipment bus ribbon cable connections, and verifying motor power connections. Internal power component failures cannot be serviced in the field, making module exchange or tested replacement the fastest solution for returning machines to operation. ABC Industrial Parts provides supply and repair options to help minimize downtime when drive power stage failures occur.
Technical Specifications
| Manufacturer | Siemens |
| Part Number | 6SN1123-1AB00-0AA1 |
| Model / Type | LT Module 2-Axis 15A Internal Cooling |
| Product Family | SIMODRIVE |
| Product Series | SIMODRIVE 611 |
| Component Type | Servo Drive Power Module |
| Number of Axes | 2 |
| Transistor Current Rating | 15 A |
| Rated Current per Axis | 5 A |
| Peak Current (Synchronous Motors) | 10 A |
| Peak Current (Induction Motors) | 8 A |
| Input Voltage Range | 380 - 480 V AC |
| Output Voltage Range | 0 - 600 V DC |
| Cooling Method | Internal Dissipation |
| Operating Temperature Range | 0 to 45 °C |
| Weight | 6.49 kg |
Programming and Configuration
The Siemens 6SN1123-1AB00-0AA1 power module acts as the physical execution stage in a SIMODRIVE 611 drive assembly, delegating logic execution and parameter storage to the control unit mounted on its front interface slot. Engineering tools such as SimoCom U and SinuCom interact directly with the control board to carry out current loop tuning, speed controller optimization, motor data configuration, and axis allocation.
Because all drive settings and application parameters are held within the removable control card, swapping a physical power stage does not require software downloads or re-parameterization. Transferring the original control card directly onto a replacement 6SN1123-1AB00-0AA1 power module retains all existing application configuration data, motor alignment settings, and fieldbus node parameters.
Communication and System Integration
System integration of the 6SN1123-1AB00-0AA1 into a SIMODRIVE 611 rack requires connecting both high-voltage DC power structures and low-voltage control communication. High-voltage DC power is distributed across adjacent drive modules via rigid copper DC link busbars mounted across the top terminals. Control communication, power stage enable signals, and diagnostic telemetry travel between adjacent power units and the infeed supply module through flat ribbon equipment bus cables.
The dual-axis LT module links to upper-level automation equipment, such as Siemens SINUMERIK CNC controllers, via the plugged-in control board. Depending on the installed control card model, real-time command reference signals pass through drive bus cables to coordinate multi-axis feed movements and spindle speeds. High-precision motor control requires proper EMC installation practices, including shielded power cabling to ensure stable sine-modulated voltage output to synchronous servo, torque, linear, and induction spindle motors.
Diagnostics and Status Indication
Diagnostic monitoring for the 6SN1123-1AB00-0AA1 power module is handled by the attached SIMODRIVE 611 control board plugged onto the front receptacle. The power stage contains internal current feedback sensors and thermal overload sensing elements, sending raw status data directly across the interface connector to the control processor.
Technicians can access active operating states, thermal metrics, and fault history by connecting a computer equipped with SimoCom U or SinuCom software to the control card service port. Additionally, fault conditions and status alarms display on the host SINUMERIK CNC system screen or on the control card status indicators.
Replacement and Spare Part Considerations
When sourcing a replacement for a 6SN1123-1AB00-0AA1 drive module, ensure that the part number, axis count, current rating, and cooling type match the failing unit. This specific module is a 2-axis power stage rated for 15 A transistor current, delivering 5 A continuous rated current for each axis (supporting feed and main spindle drives). Selecting a single-axis module or a model designed for external heatsink cutouts will lead to installation mismatch in the cabinet enclosure.
Prior to putting a replacement module into service, inspect the DC link busbar contact surfaces for cleanliness and torque all mounting screws to specification. Fasten the equipment bus ribbon connectors securely. Reinstalling the facility's existing control card onto the spare power module allows rapid startup without requiring software backups or parameter re-commissioning.
Frequently Asked Questions
Do I need to re-commission parameters when replacing a 6SN1123-1AB00-0AA1 power module?
No, parameter re-commissioning is not required during a hardware swap if you transfer the original SIMODRIVE 611 control board onto the replacement power module. All configuration data and motor parameters are stored on the control board.
What motor types can be driven by the 6SN1123-1AB00-0AA1 module?
The module is compatible with synchronous feed motors, induction main spindle motors, torque motors, linear motors, and hollow-shaft induction motors.
What are the continuous and peak current ratings of this power module?
The 6SN1123-1AB00-0AA1 has a 15 A transistor current rating and provides a continuous rated current of 5 A per axis. It supports peak currents up to 10 A for synchronous feed motors and 8 A for induction spindle motors.
How is heat dissipated from the 6SN1123-1AB00-0AA1 unit?
This module features an internal dissipation cooling system that manages thermal output directly inside the control cabinet enclosure, eliminating the need for external heatsink cabinet cutouts.
How do you view diagnostics and fault conditions for this power stage?
Diagnostics and fault codes are processed through the plugged-in SIMODRIVE 611 control board and can be evaluated using SimoCom U or SinuCom engineering software or viewed on the connected CNC controller.
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Disclaimer:
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