Siemens 6AU1390-0BA00-0AA0 Service-Ready Spare Part for Industrial Maintenance

Siemens 6AU1390-0BA00-0AA0 Service-Ready Spare Part for Industrial Maintenance

The Siemens 6AU1390-0BA00-0AA0 is a ruggedized communication module designed for the SIMOTION motion control platform, engineered to operate reliably in harsh industrial environments where vibration, temperature extremes, and electromagnetic interference are constant operational realities. For maintenance engineers managing aging motion control cabinets, this module represents a critical spare — its failure directly impacts axis coordination, drive communication, and production continuity. Sourced as an original Siemens component and pre-shipment tested, this unit is stocked to support rapid replacement and minimize unplanned downtime across manufacturing, packaging, press, and conveyor applications.

Whether you are executing a scheduled annual overhaul, responding to a fault alarm on a SIMOTION D or C-series controller, or building a strategic spare parts inventory for a multi-line facility, the 6AU1390-0BA00-0AA0 is a direct-fit replacement that eliminates compatibility risk and reduces commissioning time. Each unit ships with a 12-month warranty and is verified against original Siemens specifications before dispatch.

Spare Maintenance Table

Maintenance Planning for Continuous Operation

When a 6AU1390-0BA00-0AA0 communication module is flagged for replacement during a routine control cabinet inspection or after a drive fault event, experienced maintenance engineers know that the module rarely fails in isolation. A thorough site assessment should accompany every module swap to prevent repeat failures and ensure the restored system operates within specification.

Begin by inspecting the SIMOTION D445 or D435 controller itself — check firmware revision compatibility and verify that the replacement module’s hardware version aligns with the installed controller generation. Next, audit the DRIVE-CLiQ cabling connecting the module to SINAMICS S120 drive units; degraded or improperly terminated DRIVE-CLiQ cables are a leading cause of communication faults that are often misattributed to the module. Replace any cables showing insulation wear or connector corrosion.

Inspect the 24 VDC control power supply feeding the SIMOTION rack — voltage ripple or transient dips during motor starts can stress communication hardware over time. A SITOP PSU100S or PSU200M power supply with adequate current headroom is recommended for stable module operation. While the cabinet is open, check the terminal blocks and I/O wiring on associated SIMATIC ET 200SP or ET 200M distributed I/O stations; loose terminals cause intermittent faults that complicate fault isolation after a module replacement.

For facilities running PROFINET or PROFIBUS DP networks through this communication module, verify network topology integrity — check PROFIBUS connectors, termination resistors, and bus cables for continuity and correct impedance. A degraded network segment can cause the replacement module to report communication errors immediately after installation, leading to unnecessary re-replacement cycles. Similarly, inspect any signal isolators or surge protection devices installed on I/O lines connected to the motion system; these components absorb transient energy and should be replaced on a scheduled basis regardless of visible damage.

If the control cabinet houses a SIMATIC HMI panel (such as a TP700 Comfort or KTP900 Basic) communicating with the SIMOTION controller, verify that the HMI project is compatible with the restored controller configuration after module replacement. Backup the HMI project before any hardware change. Finally, check the backup battery on the SIMOTION controller — a depleted battery can cause configuration loss after a power cycle, which may be mistaken for a module fault. Stocking a replacement battery alongside the 6AU1390-0BA00-0AA0 is a low-cost insurance measure for any planned maintenance window.

For facilities managing multiple SIMOTION-based lines, consider maintaining a consolidated spare parts kit that includes the 6AU1390-0BA00-0AA0 communication module, at least one DRIVE-CLiQ cable set, a SITOP power supply unit, PROFIBUS termination connectors, and a set of ET 200SP I/O modules covering the most common signal types on your production floor. This approach reduces mean time to repair (MTTR) and eliminates the procurement delays that extend unplanned downtime.

Site Replacement Workflow

Step 1 — Fault Isolation: Confirm the 6AU1390-0BA00-0AA0 as the failed component using SIMOTION SCOUT diagnostics. Document the active fault codes and the last known good configuration before powering down the cabinet.

Step 2 — Safe Isolation: Follow your site LOTO (Lockout/Tagout) procedure. Isolate the 24 VDC control supply and the main drive power before opening the cabinet. Allow capacitors in the SINAMICS S120 drive to discharge fully.

Step 3 — Module Removal: Disconnect DRIVE-CLiQ connectors and any additional interface cables from the existing module. Note cable routing and connector positions before removal. Extract the module from its slot following the mechanical release procedure specified in the SIMOTION hardware manual.

Step 4 — Replacement Installation: Insert the 6AU1390-0BA00-0AA0 replacement unit into the correct slot. Reconnect all DRIVE-CLiQ and interface cables in the documented sequence. Verify connector locking engagement on all DRIVE-CLiQ ports.

Step 5 — Power-Up and Commissioning: Restore control power and observe the module’s LED status indicators during boot. Use SIMOTION SCOUT to confirm the module is recognized and that all configured drive axes are online. Clear any residual fault codes and perform a test cycle before returning the line to production.

Step 6 — Documentation: Record the replacement date, module serial number, and post-replacement test results in your maintenance management system (CMMS). Schedule the next inspection interval based on your facility’s preventive maintenance calendar.

Spare Parts Support FAQ

Q: Is the 6AU1390-0BA00-0AA0 a direct drop-in replacement for units with reference numbers A5E00320933 or A5E00458182?
A: Yes. A5E00320933 and A5E00458182 are Siemens internal reference numbers associated with the 6AU1390-0BA00-0AA0. These references appear on original Siemens documentation and packaging. The unit supplied is functionally and mechanically equivalent and is suitable for direct replacement without hardware modification.

Q: How is each unit tested before shipment?
A: Every 6AU1390-0BA00-0AA0 unit undergoes pre-shipment functional verification covering power-up behavior, communication interface integrity, and visual inspection for physical damage. Units that do not pass verification are not dispatched. The 12-month warranty covers functional defects identified after installation under normal operating conditions.

Q: Can I source this module on a long-term or blanket order basis for multi-site inventory programs?
A: Yes. Long-term supply agreements and blanket purchase orders are supported. For facilities managing multiple SIMOTION installations or executing a multi-year lifecycle extension program for legacy motion control systems, consolidated procurement arrangements are available. Contact our team at sale@ninermas.com to discuss volume pricing and scheduled delivery programs.

Q: What is the recommended spare parts holding strategy for the 6AU1390-0BA00-0AA0?
A: For facilities with one to three SIMOTION-based lines, holding a minimum of one unit on-site is recommended. Facilities with four or more lines, or those operating in 24/7 continuous production environments, should consider a two-unit minimum to cover simultaneous failures or back-to-back replacement scenarios. Given the lead time sensitivity of motion control spare parts, proactive stocking significantly reduces the financial impact of unplanned downtime.