Siemens SIMODRIVE 611 Modules: 6AU1390-0AA00-0AA1

Technical Dossier

Product Details And Specifications

Siemens SIMODRIVE 611 Series Technical Notes

The architecture is built around a common DC bus (Zwischenkreis) topology, allowing multiple axis modules to share a single regenerative supply unit. This design reduces cabinet footprint and simplifies energy recovery — characteristics that made the 611 the default drive platform for Siemens SINUMERIK 840D, 810D, and 840C CNC controllers throughout the 1990s and 2000s. Installed base estimates place active SIMODRIVE 611 units in the hundreds of thousands globally, the majority operating within machine tools and transfer lines that carry replacement costs well above USD 500,000 per cell.

The specific module covered in this listing — the 6AU1390-0AA00-0AA1 (A5E00442198) — is a control board assembly used within the SIMODRIVE 611 drive stack. Its failure directly disables axis motion, halting production on any machine tool or handling system dependent on that axis.

The Evolution of SIMODRIVE 611 Architecture

The SIMODRIVE 611 platform was introduced in the late 1980s as the successor to the SIMODRIVE 6SC61 series. Its development tracked the transition from analog velocity-loop drives to fully digital field-oriented control. The architecture evolved through three identifiable generations:

Generation 1 — Analog Interface (611A): Drive modules communicated via ±10 V analog speed references and digital enable signals. Compatible with SINUMERIK 805 and early 840C controllers. These modules are now fully discontinued and represent the highest-demand obsolete segment.

Generation 2 — Digital Drive Bus (611D): Introduced the DRIVE-CLiQ predecessor, a proprietary serial drive bus connecting the NCU to drive modules. This generation aligned with SINUMERIK 840D (Solution Line predecessor) and 810D. The 611D modules, including the 6SN1118, 6SN1123, and 6SN1124 families, remain the dominant installed base.

Generation 3 — Universal (611U/UE): Added PROFIBUS-DP interface capability and expanded the platform toward standalone motion control without a dedicated CNC. The 611U series bridged SIMODRIVE into the era of SINAMICS, Siemens' current drive platform.

Siemens officially transitioned new machine designs to SINAMICS S120 from approximately 2006 onward. SIMODRIVE 611 spare parts support has progressively narrowed. Many sub-assemblies — including control boards, power modules below 15 A, and communication adapters — are no longer manufactured. Facilities operating SINUMERIK 840D/810D machines built before 2010 face a structural spare parts deficit that will intensify through the 2030s.

SIMODRIVE 611 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly encountered modules within the SIMODRIVE 611 platform. Each entry reflects a distinct functional role within the drive stack.

Control & Regulation Boards

6AU1390-0AA00-0AA1: Control board assembly, SIMODRIVE 611 axis module, A5E00442198 variant
6SN1118-0AA11-0AA1: Closed-loop control module, 1-axis, for 611D digital drive
6SN1118-0AA11-0AA0: Closed-loop control module, 1-axis, earlier hardware revision
6SN1118-0DH23-0AA1: Closed-loop control module, 2-axis, SINUMERIK 840D interface
6SN1118-0DH23-0AA2: Closed-loop control module, 2-axis, revised firmware baseline

Power Modules — Feed & Axis

6SN1123-1AA00-0CA1: Power module, 2-axis, 9 A continuous, 611D compatible
6SN1123-1AA00-0DA1: Power module, 2-axis, 18 A continuous, 611D compatible
6SN1124-1AA00-0CA1: Power module, 1-axis, 9 A, for high-inertia spindle applications
6SN1124-1AA00-0DA1: Power module, 1-axis, 18 A, spindle or feed axis
6SN1145-1BA01-0BA1: Infeed/regenerative feedback module, 16 kW, unregulated
6SN1146-1AB00-0BA1: Infeed module, 36 kW, regulated, with line filter interface

Monitoring & Interface Modules

6SN1114-0AA01-0AA1: Monitoring module, DC bus overvoltage protection, 611 bus segment
6SN1162-0GA00-0AA1: Shield connection terminal module, EMC bus bar assembly
6SN1111-0AA01-0AA1: Drive bus termination plug, required at end of 611D bus chain

Communication & Expansion

6SN1114-0AA00-0AA1: PROFIBUS-DP adapter for SIMODRIVE 611U standalone operation
6SN1113-1AA00-0LA0: Pulse encoder interface module, TTL/HTL input, 611 axis slot

Sourcing Hard-to-Find & Obsolete SIMODRIVE 611 Parts

For facilities managing a fleet of SINUMERIK 840D or 810D machines, the most cost-effective strategy is forward stocking: identifying the two or three drive module types with the highest failure probability in your specific machine configuration and securing a minimum of two spare units per type. The cost of a single unplanned production stoppage on a transfer line typically exceeds the cost of a full spare drive cabinet by a factor of three to ten.

DriveKNMS can cross-reference your machine's drive configuration from the SINUMERIK 840D NCU parameter backup or the machine's electrical schematic to identify the exact module variants installed.

Quality Control for the SIMODRIVE 611 Range

SIMODRIVE 611 modules — particularly control boards and power stages — require a structured verification process before redeployment. The following steps are applied to every unit processed by DriveKNMS:

1. Visual and Physical Inspection: Full board inspection under magnification. Pin corrosion on the drive bus connector (X411/X412) is the most common physical defect on stored units. Corroded pins are cleaned or the connector assembly is replaced.

2. Electrolytic Capacitor Assessment: DC bus capacitors and local decoupling capacitors are measured for capacitance and ESR. Units with capacitors outside ±20% of rated capacitance are recapped before testing.

3. Firmware Version Verification: Control boards are read for firmware revision. Compatibility between the control board firmware and the connected SINUMERIK NCU software version is confirmed against Siemens' published compatibility matrix.

4. Functional Load Test: Power modules are tested under resistive load at rated current. Control boards are tested in a live 611D bus configuration with a reference NCU to verify encoder interface, current regulation loop, and fault reporting.

5. Final Documentation: Each unit ships with a test record noting firmware version, capacitor measurements, and load test results. This documentation supports the customer's maintenance records and any future audit requirements.