Siemens SIMODRIVE 611 Modules: 6SN1118-0NH01-0AA1

Technical Dossier

Product Details And Specifications

Siemens SIMODRIVE 611 Series Technical Notes

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.

The Evolution of SIMODRIVE 611 Architecture

SIMODRIVE 611 was introduced in the early 1990s as a successor to the SIMODRIVE 6SC61 series, transitioning from analog control to digital closed-loop servo regulation. The platform evolved through three distinct hardware generations:

Generation 1 (611A – Analog): Deployed from approximately 1990–1998. Control boards used analog setpoint interfaces. Compatible with SINUMERIK 805 and early 840C controllers. These modules are now fully obsolete and require specialist refurbishment.

Generation 2 (611D – Digital): Introduced circa 1995. Replaced analog setpoint with DRIVE-CLiQ precursor protocols and digital encoder interfaces (EnDat, SSI, TTL). Compatible with SINUMERIK 840D sl and 810D. The 6SN1118-0NH01-0AA1 belongs to this generation as a closed-loop control module for two-axis configurations.

Generation 3 / Transition (611U – Universal): Introduced circa 2000 as a bridge platform supporting both standalone and SINUMERIK-integrated operation. Offered expanded fieldbus options including PROFIBUS-DP. Siemens officially announced end-of-sale for the 611 platform in 2015, with end-of-repair support phased through 2025–2030 depending on module type. Replacement migration path is SINAMICS S120 with CU320-2 Control Unit.

SIMODRIVE 611 Full Catalog & Functionalities (SKU List)

Control Modules (Closed-Loop / Axis Regulation)

6SN1118-0NH01-0AA1: Two-axis closed-loop control module, digital, for 611D system, SINUMERIK 840D compatible.
6SN1118-0NH00-0AA1: Single-axis closed-loop control module, digital interface, 611D platform.
6SN1118-0DH23-0AA0: Two-axis control module, analog setpoint, 611A generation, TTL encoder input.
6SN1118-0DH21-0AA0: Single-axis analog control module, resolver interface, 611A series.
6SN1118-0AA11-0AA0: Speed/torque control module, universal interface, 611U generation.

Power Supply Modules (Infeed / Regenerative)

6SN1145-1BA01-0BA1: Unregulated infeed/regenerative module, 16 kW, 3-phase 400 V AC input.
6SN1145-1BA02-0CA1: Regulated infeed module, 36 kW, active front-end with line filter integration.
6SN1146-1AB00-0BA1: Monitoring module for DC bus, overvoltage protection, 611 system bus compatible.
6SN1111-0AA01-1JA0: Line filter module, EMC Class C2, for 611 infeed units up to 36 kW.

Power Drive Modules (Axis / Spindle)

Communication & Interface Modules

6SN1114-0AA01-0AA0: PROFIBUS-DP interface module for 611U, enables fieldbus integration with SIMATIC S7.
6SN1162-0GA00-0AA0: Expansion module for additional encoder channels, SSI/EnDat compatible.
6SN1113-1AA00-1KA0: Shield connection terminal module, DIN rail mount, for 611 cabinet wiring.

Sourcing Hard-to-Find & Obsolete SIMODRIVE 611 Parts

Siemens ceased new production of the majority of SIMODRIVE 611 control and power modules between 2015 and 2020. For facilities operating SINUMERIK 840D or 810D-based machine tools, migration to SINAMICS S120 is the OEM-recommended path; however, the capital cost and requalification time associated with a full drive replacement make continued maintenance of the 611 platform the practical choice for most production environments.

DriveKNMS maintains a dedicated inventory of SIMODRIVE 611 modules sourced from decommissioned machine tool lines, factory overstock, and certified repair cycles. All units are catalogued by part number, hardware revision, and firmware version where applicable. For modules such as the 6SN1118-0NH01-0AA1 that are no longer available through Siemens distribution channels, DriveKNMS provides:

Quality Control for the SIMODRIVE 611 Range

SIMODRIVE 611 control modules such as the 6SN1118-0NH01-0AA1 incorporate multi-layer PCBs with high-density SMD components, FPGA-based axis regulation logic, and proprietary Siemens backplane bus connectors. Standard bench testing is insufficient for validating these modules. DriveKNMS applies the following test protocol to all 611 series units:

• Backplane Bus Integrity Test: Verification of all 64-pin backplane connector signals against Siemens 611D bus specification, including CLK, DATA, and ENABLE lines.
• Encoder Interface Validation: Functional test of TTL, HTL, SSI, and EnDat encoder input channels using calibrated signal generators.
• Closed-Loop Servo Simulation: Each axis channel is loaded with a simulated motor model to verify current regulation, speed loop response, and fault detection logic.
• RFQ terms review: Commercial terms are confirmed during RFQ review based on model, condition, documentation, quantity and destination.
• Firmware Version Logging: EPROM and flash firmware versions are recorded and disclosed to the customer to ensure compatibility with the target SINUMERIK controller version.