Bosch Rexroth HMS01.1N-W0150-A-07-NNNN AC Servo Drive – IndraDrive M

Bosch Rexroth HMS01.1N-W0150-A-07-NNNN — Single-Axis IndraDrive M Servo Amplifier in the Closed-Loop Motion Architecture

The HMS01.1N-W0150-A-07-NNNN is a single-axis AC servo drive belonging to the IndraDrive M (HMS01) product family from Bosch Rexroth. Within a coordinated motion control architecture, this unit occupies the power conversion and closed-loop regulation layer: it receives motion commands from a higher-level controller via a real-time fieldbus, executes current, velocity, and position control loops internally, and delivers precisely shaped AC output to the connected servo motor. The W0150 current rating (15 A continuous) positions this drive for servo axes in the 2.5–5.5 kW mechanical power range, covering the majority of single-axis applications in machine tools, packaging lines, and handling systems.

The drive’s internal architecture separates the control section from the power section on a shared DC bus topology. The DC bus is fed by a dedicated Rexroth HMV supply module, which rectifies and conditions the mains supply. Multiple HMS01 drives share this common DC bus, allowing regenerative energy from decelerating axes to be absorbed by accelerating axes without returning energy to the mains — a measurable efficiency gain in multi-axis cabinets. The A-07 hardware variant designator indicates the specific PCB revision of the control section, which determines compatible firmware branches and available communication protocol options.

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Technical Parameters

Hardware Logical Analysis

The HMS01.1N-W0150-A-07-NNNN implements a three-tier control hierarchy on a single PCB stack: the DSP-based current regulator, the velocity/position observer, and the fieldbus communication processor operate on separate clock domains, preventing communication jitter from propagating into the torque control loop. The current regulator executes at a fixed 250 µs cycle, independent of the fieldbus cycle time, which decouples mechanical dynamics from network latency.

EMC Architecture: The power section uses a three-phase IGBT bridge with integrated gate drive isolation. The DC bus capacitor bank is physically separated from the control PCB by a grounded shield plane, reducing capacitively coupled switching noise by approximately 20 dB at frequencies above 1 MHz. The control section’s analog signal paths — encoder feedback, resolver inputs, and analog command channels — are routed on a dedicated inner PCB layer with a continuous ground pour, maintaining signal integrity in environments with high-frequency switching transients from adjacent drives on the same bus.

Encoder Interface Logic: The A-07 control section supports multi-turn absolute encoders via Hiperface and EnDat 2.2 protocols, with a 32-bit position word transmitted over a differential RS-485 physical layer. The encoder supply is galvanically isolated from the drive’s internal 24 V logic rail, preventing ground loop currents from corrupting position data — a common failure mode in long cable runs exceeding 25 m.

Thermal Management: The rear-mounted aluminum heat sink is thermally bonded to the IGBT module via a phase-change thermal interface material. An NTC thermistor embedded in the heat sink feeds the thermal model in the DSP, which applies a continuous derating curve above 40 °C rather than a hard trip threshold. This allows the drive to sustain reduced output current through thermal events without triggering a fault and halting the machine cycle — a significant advantage in high-ambient enclosures.

DC Bus Redundancy Logic: In a multi-axis HMS01 cabinet, the DC bus arbitration logic monitors individual drive fault states. If one axis trips, the remaining drives continue to operate from the shared bus without interruption, provided the HMV supply module’s current capacity is not exceeded. This non-propagating fault architecture reduces unplanned downtime in multi-axis systems compared to designs where a single axis fault collapses the shared bus.

System Integration Benefits

• Deterministic Real-Time Response: SERCOS III and EtherCAT fieldbus interfaces provide cycle times down to 250 µs with hardware-timestamped position data, enabling synchronous multi-axis interpolation without accumulated phase error across axes.
• Plug-and-Play Motor Identification: The drive reads motor nameplate data from the encoder EEPROM (Hiperface/EnDat) at power-up, automatically loading commutation offset, pole pair count, and thermal model parameters — eliminating manual motor commissioning steps and reducing parameterization errors.
• Integrated Functional Safety Without External Relays: STO and SS1 are implemented in hardware within the drive, certified to SIL 3 / PLe. This eliminates the external safety relay module and associated wiring, reducing cabinet component count and simplifying IEC 62061 safety validation documentation.
• Diagnostic Transparency via IndraWorks: The drive exposes over 200 diagnostic parameters via the fieldbus and the IndraWorks Engineering tool, including real-time current waveforms, thermal headroom, encoder signal quality metrics, and bus voltage ripple — enabling predictive maintenance without additional instrumentation.
• Regenerative Energy Sharing on Common DC Bus: Deceleration energy from one axis is directly available to accelerating axes on the same DC bus segment. In typical multi-axis packaging machines, this reduces peak mains current demand by 15–30%, allowing a smaller HMV supply module and lower-rated mains fusing.
• Scalable Current Range Within Identical Footprint: The HMS01 family uses the same 50 mm wide housing from 6 A to 210 A. Upgrading from a W0150 to a higher-current variant requires only drive replacement and parameter transfer — no cabinet re-layout, no new mounting hardware, no new fieldbus cabling.
• Standalone Motion Execution: With IndraWorks MP firmware, the drive can execute stored motion programs (point-to-point, cam profiles, electronic gearing) without a higher-level PLC, reducing system cost and communication latency for simple single-axis applications.
• Multi-Protocol Fieldbus on Single Hardware: The same HMS01.1N-W0150-A-07-NNNN hardware supports SERCOS III, EtherCAT, PROFIBUS DP, and CANopen through firmware selection. This allows a single spare unit to cover multiple machine variants in a plant, reducing spare parts inventory cost.
• Vibration Damping Filter: The velocity loop includes a configurable notch filter (50–2000 Hz, adjustable Q-factor) for suppressing mechanical resonances in the load train. This is particularly relevant for long ballscrew axes and belt-driven gantries where structural resonance limits achievable bandwidth without active damping.
• UL 508C Certification for North American Markets: The drive carries UL 508C listing, satisfying NEC and NFPA 79 requirements for industrial machinery in the US and Canada without additional field evaluation — a prerequisite for OEM machine export to North American end-users.

Quality Assurance & Global Logistics

Every HMS01.1N-W0150-A-07-NNNN unit dispatched from our Xiamen, China facility is sourced directly from Bosch Rexroth’s authorized distribution network. Each unit undergoes a structured pre-shipment inspection protocol: part number and hardware revision verification against Rexroth’s official documentation, visual inspection of the PCB, connector housings, and front-panel label for physical integrity, and a power-on functional check where test equipment permits. Units are packed in anti-static foam-lined cartons with humidity indicator cards and desiccant sachets, maintaining storage conditions within Rexroth’s specified limits during transit.

From Xiamen, we ship via DHL Express, FedEx International Priority, and UCP air freight to destinations across Europe, Southeast Asia, the Middle East, and the Americas. Standard in-stock orders are dispatched within 1–2 business days of payment confirmation. Export documentation — commercial invoice, packing list, and certificate of origin — is prepared for all international shipments. For orders requiring formal customs clearance support or HS code classification, our logistics team provides documentation assistance at no additional charge.

All units are covered by a 12-month warranty from the dispatch date, covering verified manufacturing defects and component failures under normal operating conditions. Warranty claims are processed with a target response time of 48 hours. For units requiring factory-level repair, we coordinate directly with Bosch Rexroth’s authorized service network to minimize turnaround time.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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