Rexroth HMS01.1N-W0036-A-07-NNNN Single Axis Inverter – Obsolete IndraDrive Spare Part

Technical Dossier

Product Details And Specifications

Rexroth HMS01.1N-W0036-A-07-NNNN Single Axis Inverter – Obsolete IndraDrive Spare Part

When a Rexroth IndraDrive servo inverter fails on a production line, the consequences extend far beyond the cost of the component itself. A single HMS01.1N-W0036-A-07-NNNN unit controls axis motion in coordinated multi-axis machinery — packaging lines, press feeders, CNC transfer systems, and robotic cells that were engineered around this specific drive architecture. Bosch Rexroth discontinued the HMS01.1N series as part of the broader IndraDrive Cs/M platform transition. Replacement with a current-generation drive requires new motor feedback cabling, firmware migration, PLC parameter re-mapping, and in many cases, mechanical re-commissioning. Engineering and downtime costs for a full drive platform upgrade routinely exceed USD 150,000–400,000 per axis group. DriveKNMS maintains verified physical stock of the HMS01.1N-W0036-A-07-NNNN. Securing a spare now is not a purchasing decision — it is an asset protection decision.

Technical Specifications

Solving the Discontinued Hardware Crisis

The HMS01.1N-W0036-A-07-NNNN was the motion control backbone of a generation of high-throughput industrial machinery built between the late 1990s and mid-2010s. These machines were not designed with a 10-year obsolescence horizon in mind — they were built to run for 25–30 years. The problem is that Bosch Rexroth's product lifecycle did not match that expectation.

Factories operating Rexroth IndraDrive M systems face a specific and well-documented dilemma: the drive communicates via SERCOS II at a fixed cycle time, and the motion program is tightly coupled to the drive's firmware version. Swapping to a current IndraDrive Cs or IndraDrive Mi unit is not a drop-in exercise. It requires IndraWorks DS re-parameterization, motor encoder re-identification, and in SERCOS ring topologies, full ring re-addressing. For a plant running 12–24 coordinated axes, this is a multi-week shutdown event.

The lowest-cost path to protecting a Rexroth IndraDrive M installation is maintaining a verified spare HMS01.1N-W0036-A-07-NNNN on the shelf. One unit held in reserve eliminates the risk of an unplanned 3–6 week production halt. For facilities with multiple identical axes, a two-unit buffer is standard practice in asset-intensive industries such as automotive stamping, pharmaceutical packaging, and steel processing.

How to extend your IndraDrive M system life by 5–10 years — a practical framework for plant management:

• Spare inventory audit: Map every HMS01.1N variant in your facility. Identify axes with no spare coverage. Prioritize by production criticality, not by age alone.
• Firmware version lock: Document the exact firmware version running on each drive. Do not allow IndraWorks updates that change the firmware baseline without a full recommissioning plan in place.
• Predictive replacement triggers: Schedule proactive drive replacement at the first sign of DC bus ripple anomalies or SERCOS communication errors — not after a hard fault. A controlled swap takes 4 hours; an emergency swap after a catastrophic failure can take 4 days.
• Capacitor lifecycle management: Electrolytic capacitors in the DC bus section of HMS01.1N drives have a rated service life. Drives that have been in continuous service for 10+ years should be evaluated for capacitor condition before being placed in critical-axis service.
• Supplier qualification: Establish a qualified source for HMS01.1N spares before you need one. Lead times on the open market for discontinued Rexroth drives range from 8 to 26 weeks. DriveKNMS maintains ready stock with same-week dispatch capability.

Condition & Reliability Assurance

Every HMS01.1N-W0036-A-07-NNNN unit shipped by DriveKNMS passes a structured 5-stage inspection protocol before dispatch. For discontinued drives, the inspection standard is more rigorous than for current-production parts, because the failure modes of aged power electronics are specific and consequential.

• Stage 1 – DC Bus Capacitor Assessment: Electrolytic capacitors are the primary wear component in any servo drive. Each unit is evaluated for capacitor ESR (equivalent series resistance) and capacitance retention. Units showing capacitor degradation are either reconditioned with new capacitors or rejected from stock.
• Stage 2 – Firmware Version Verification: The firmware slot identifier in the part number (position 07 in HMS01.1N-W0036-A-07-NNNN) is verified against the physical firmware card. The version is documented and provided with the shipment to allow the end-user to confirm compatibility with their IndraWorks project before installation.
• Stage 3 – Terminal and Connector Inspection: All power terminals, SERCOS fiber connectors, and signal connectors are inspected under magnification for pin corrosion, oxidation, and mechanical damage. Corroded contacts are the leading cause of intermittent faults in stored drives.
• Stage 4 – Power-On Functional Test: Where test infrastructure permits, units are powered and brought to ready state. DC bus voltage, fan operation, and communication interface response are verified.
• Stage 5 – Packaging for Long-Term Storage: Units are packed in anti-static bags with desiccant and shock-absorbing foam. Packaging is rated for international air and sea freight.

Key Features for System Maintenance

• Drop-in replacement: The HMS01.1N-W0036-A-07-NNNN is a direct mechanical and electrical replacement for any failed unit of the same part number. No hardware modification to the cabinet is required.
• No re-programming required: Provided the firmware version matches, drive parameters are stored in the motor encoder memory (Rexroth MKD/MHD motors) or in the control section. Parameter restore from IndraWorks backup takes under 30 minutes.
• Avoids engineering reconstruction costs: A platform migration away from IndraDrive M involves mechanical, electrical, and software engineering across multiple disciplines. The cost of one spare drive is a fraction of one day of that project.
• Same-week dispatch: Stock is held at DriveKNMS warehouse. Standard dispatch is within 3–5 business days of order confirmation. Expedited dispatch available on request.

FAQ

What warranty applies to a discontinued HMS01.1N-W0036-A-07-NNNN?
DriveKNMS provides a 12-month warranty against defects in the unit as supplied. Warranty covers failure under normal operating conditions consistent with the original Rexroth specification. It does not cover damage resulting from incorrect installation or operation outside rated parameters.

How do I confirm this is a genuine Rexroth unit and not a counterfeit?
All units supplied by DriveKNMS carry original Rexroth serial number plates. Serial numbers can be cross-referenced against Rexroth's production records where OEM verification services are available. We provide full documentation of the unit's provenance on request.

Should I buy more than one unit?
For any axis that is critical to production continuity, holding a minimum of one spare is standard practice. For facilities with multiple axes using the same drive model, a two-unit buffer eliminates single-point-of-failure risk. Given that HMS01.1N stock on the global market is finite and diminishing, procurement decisions made today will be more difficult and more expensive in 18–36 months.

Can you source other HMS01.1N variants?
Yes. DriveKNMS specializes in the full IndraDrive M and IndraDrive C legacy range. Contact us with your specific part number for availability and lead time.