Siemens 6AU1390-0AA00-0AA1 Replacement for SIMODRIVE

Product Overview

Siemens 6AU1390-0AA00-0AA1 Replacement for SIMODRIVE: Seamless Transition from Legacy Servo Systems

The Siemens 6AU1390-0AA00-0AA1 (A5E00442198) is a SIMODRIVE servo control module designed for high-precision axis control in CNC machining centers, automated production lines, and motion-critical industrial applications. As legacy SIMODRIVE 611 and SIMODRIVE 611U drive systems approach end-of-life or become increasingly difficult to source, the 6AU1390-0AA00-0AA1 serves as a proven replacement and upgrade solution — enabling engineers to restore full servo functionality without redesigning the control cabinet or rewriting the motion program from scratch.

This module is engineered for smooth integration into existing SIMODRIVE drive stacks. Its physical form factor, connector pinout, and communication interface are compatible with the original SIMODRIVE 611 axis control architecture, meaning that in most retrofit scenarios, the existing motor feedback cables, power wiring, and PROFIBUS DP or drive bus connections can be reused without modification. This dramatically reduces commissioning time and minimizes production downtime during the changeover.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful SIMODRIVE servo system retrofit rarely involves a single module in isolation. When replacing the 6AU1390-0AA00-0AA1 control module, engineers typically evaluate the surrounding drive architecture to ensure the entire axis group operates reliably after the changeover.

In most SIMODRIVE 611 installations, the servo control module works in conjunction with a SIMODRIVE 611 power module (such as the 6SN1123 or 6SN1124 series) and a shared infeed/regenerative feedback module (NE module) like the 6SN1145 series, which supplies the DC bus voltage to all axis modules in the rack. If the NE module or power section shows signs of aging — capacitor degradation, IGBT wear, or fault codes — it is advisable to inspect and potentially replace these components alongside the control module to avoid a secondary failure shortly after commissioning.

The motor feedback path is equally critical. The SIMODRIVE 611 encoder cable assembly and the SMC (Sensor Module Cabinet-Mounted) or direct encoder interface on the control board must be verified for signal integrity. In older installations, degraded shielding on feedback cables can introduce noise that triggers encoder faults even after a clean module swap. Replacing or re-terminating the feedback cable at both the motor and the control module connector is a low-cost step that prevents post-retrofit nuisance faults.

On the communication side, the SIMODRIVE drive bus or PROFIBUS DP segment connecting the SINUMERIK CNC controller (such as the SINUMERIK 840D sl or 810D) to the drive modules must be verified for correct termination and bus address assignment. After installing the replacement 6AU1390-0AA00-0AA1, the axis parameters must be re-uploaded or re-entered using SimoCom U software, and the drive bus topology must be re-scanned to recognize the new module. This is a standard commissioning step and does not require changes to the CNC part program or PLC ladder logic in most cases.

For installations where the control cabinet also houses a SIMATIC S7-300 or S7-400 PLC coordinating the motion sequence, the PLC program typically communicates with the SINUMERIK controller via MPI or PROFIBUS, and the servo axis replacement is transparent to the PLC logic — no program modification is required. However, if the system uses a SIMOTION D or SIMOTION C motion controller instead of a SINUMERIK CNC, the axis object configuration in SCOUT engineering software should be reviewed to confirm that the replacement module’s firmware version is compatible with the existing SIMOTION project.

In multi-axis gantry or coordinated motion systems, it is common to find the 6AU1390-0AA00-0AA1 installed alongside other SIMODRIVE 611 double-axis or single-axis modules. Replacing one axis module while leaving adjacent modules in service is fully supported, provided the DC bus connections and drive bus segment remain intact during the swap. Use appropriate ESD precautions and ensure the infeed module is powered down before removing or inserting any SIMODRIVE rack module.

For applications requiring I/O expansion at the drive level, the SIMODRIVE 611 terminal module (6SN1114 series) provides additional digital I/O points for enable signals, fault acknowledgment, and speed override inputs — these remain fully compatible with the replacement control module and do not require reconfiguration.

Retrofit Guidance FAQ

Q: Can I reuse my existing motor power and feedback cables?
A: In the majority of SIMODRIVE 611 retrofit scenarios, yes. The 6AU1390-0AA00-0AA1 uses the same connector layout as the original control module. Verify cable condition and shielding integrity before reconnecting. Replace any cables showing insulation damage or corroded pins.

Q: Do I need to modify my SINUMERIK CNC program or PLC ladder logic?
A: No. The replacement module is parameterized at the drive level using SimoCom U. The CNC part program and PLC logic are unaffected. Only the drive parameters (axis data set, encoder configuration, current/speed controller gains) need to be re-entered or restored from a backup.

Q: Is the PROFIBUS DP address retained after module replacement?
A: The PROFIBUS DP address is set via the drive bus topology and the module’s DIP switch or software address assignment. After installing the replacement module, perform a drive bus scan from the SINUMERIK or SimoCom U to re-assign the address. This is a standard commissioning step taking approximately 15–30 minutes.

Q: What physical space does the module require in the control cabinet?
A: The 6AU1390-0AA00-0AA1 is a standard SIMODRIVE rack-mount module. It occupies the same slot width as the original module it replaces. No cabinet modification or additional mounting hardware is required for a direct swap.

Q: What if my system uses a SIMOTION controller instead of SINUMERIK?
A: Review the axis object configuration in SIMOTION SCOUT to confirm firmware compatibility. In most cases, the replacement module is recognized automatically after a drive bus re-scan. Contact TOPNLMS technical support if you require firmware version matching for your specific SIMOTION project version.

Q: Can this module replace a double-axis SIMODRIVE 611 module?
A: The 6AU1390-0AA00-0AA1 is a single-axis control module. If your application currently uses a double-axis module, you will need to evaluate whether a single-axis replacement is mechanically and electrically feasible within your existing rack configuration.

Warranty Assurance

Every 6AU1390-0AA00-0AA1 (A5E00442198) unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each module undergoes functional verification including power-on self-test, communication interface check, and visual inspection for physical damage. Units that do not pass inspection are not shipped.

In the event of a warranty claim, TOPNLMS provides a replacement unit or full refund within the warranty period. Our technical team is available to assist with installation questions, parameter backup, and commissioning guidance. We maintain stock of this module to support urgent replacement requirements, with standard dispatch within 1–3 business days and expedited options available for critical production downtime situations.

All units are shipped with appropriate anti-static packaging and export documentation. We support international shipments with full commercial invoice and packing list documentation for customs clearance.