Rexroth HMS01.1N-W0036-A-07-NNNN Safety-Reliable Servo Inverter

Rexroth HMS01.1N-W0036-A-07-NNNN Safety-Reliable Servo Inverter for Critical Control Sites

The Rexroth HMS01.1N-W0036-A-07-NNNN is a single-axis AC servo inverter from Bosch Rexroth’s IndraDrive M series, engineered for demanding industrial environments where control loop integrity and uninterrupted machine operation are non-negotiable. Rated at 3.6 kVA continuous output power with a 400 V AC three-phase supply, this drive module delivers precise torque and velocity control across a wide range of servo motor configurations, making it a cornerstone component in safety-critical automation architectures.

In continuous production facilities — petrochemical plants, power generation stations, metallurgical rolling mills, port crane systems, and water treatment infrastructure — a single axis drive failure can cascade into unplanned downtime, process contamination, or personnel hazard. The HMS01.1N-W0036-A-07-NNNN is designed to minimize these risks through robust hardware design, integrated safety logic, and proven field reliability across decades of industrial deployment.

Safety Reliability Table

Control Cabinet Risk Reduction Strategy

Deploying the HMS01.1N-W0036-A-07-NNNN within a well-engineered control cabinet architecture significantly reduces the probability of safety-critical failures. In high-electromagnetic-interference environments — such as those found near large variable frequency drives, arc furnaces, or high-current bus bars — the IndraDrive M series benefits from pairing with a Rexroth HMV01.1E-W0030 supply unit, which provides stable DC bus regulation and active front-end regeneration, preventing voltage spikes from propagating into the servo axis.

For multi-axis systems, the HMS01.1N-W0036-A-07-NNNN shares a common DC bus with companion modules such as the HMS01.1N-W0054-A-07-NNNN and HMS01.1N-W0020-A-07-NNNN, enabling energy exchange between axes and reducing peak demand on the supply unit. This architecture is particularly valuable in coordinated motion applications — winding machines, multi-axis gantries, and synchronized conveyor systems — where one axis decelerating can feed energy to another accelerating.

Signal integrity is maintained through the SERCOS III real-time Ethernet communication protocol, which provides deterministic cycle times as low as 62.5 µs. In environments prone to communication anomalies, pairing the drive with a Rexroth IndraControl L45 controller and shielded SERCOS fiber or Cat6A cabling eliminates signal drift and ensures that position commands arrive without jitter — critical for precision cutting, pressing, or injection molding operations.

On the power protection side, integrating a Rexroth HLC01.1E line filter upstream of the supply unit suppresses conducted EMI and protects against surge events from the utility grid. For facilities with unstable power quality — common in mining operations, offshore platforms, and remote industrial sites — adding a Rexroth HNF01.1A-F240-R0026-A-480-NNNN mains filter further attenuates harmonic distortion and prevents nuisance tripping of the drive’s internal protection circuits.

Safety interlock circuits benefit from the drive’s integrated Safe Torque Off (STO) function, which can be wired directly to a Pilz PNOZ safety relay or a Siemens 3SK1 safety relay module without requiring an external contactor in the motor circuit. This reduces the number of mechanical switching elements in the safety loop, lowering maintenance burden and improving mean time between failures (MTBF) for the overall safety system.

In dusty or humid environments — grain processing, cement plants, coastal installations — the drive should be housed in an IP54 or IP65 enclosure with filtered air exchange. Pairing the HMS01.1N-W0036-A-07-NNNN with a Rexroth CSH01.1C-SE-ENS-EN2-NNN-S1-S-NN-FW control section allows firmware-level diagnostics to be monitored remotely, enabling predictive maintenance before thermal or insulation degradation causes an unplanned trip.

Critical Industrial Safety Applications

Petrochemical & Refinery: In ATEX-classified zones adjacent to control rooms, the HMS01.1N-W0036-A-07-NNNN drives actuators for emergency isolation valves, compressor inlet guide vanes, and pump speed control. Its STO function integrates with the plant’s Safety Instrumented System (SIS) to achieve SIL 2 loop integrity without additional hardware. Reliable servo control prevents valve hunting and pressure excursions that could trigger safety shutdowns or flare events.

Power Generation: In turbine governor systems and boiler feed pump drives, precise speed regulation is essential for grid frequency stability. The IndraDrive M’s fast current loop response — under 62.5 µs — ensures that load disturbances are corrected before they propagate to the mechanical drivetrain, protecting couplings, gearboxes, and impellers from fatigue damage.

Mining & Mineral Processing: Conveyor belt drives, crusher feed systems, and flotation cell agitators operate in environments with extreme dust loading, vibration, and voltage fluctuations from large motor starts. The HMS01.1N-W0036-A-07-NNNN’s robust DC bus architecture and EMC-compliant design maintain stable operation even when neighboring equipment generates significant electrical noise.

Water & Wastewater Treatment: Pump and blower drives in water treatment plants must operate continuously with minimal intervention. The drive’s integrated diagnostics and SERCOS III communication allow SCADA systems to monitor drive health in real time, enabling operators to schedule maintenance during low-demand periods rather than responding to emergency failures.

Metallurgy & Rolling Mills: In hot and cold rolling applications, coordinated multi-axis tension control demands sub-millisecond synchronization between drive axes. The HMS01.1N-W0036-A-07-NNNN’s SERCOS III interface and high-bandwidth current control make it suitable for master-slave torque sharing configurations that prevent strip breakage and surface defects.

Port & Marine: Ship-to-shore crane drives and shipboard winch systems face salt-laden air, wide temperature swings, and generator-quality power. The drive’s wide input voltage tolerance and surge withstand capability ensure reliable operation in these challenging environments, reducing the risk of cargo handling interruptions or vessel positioning failures.

Safety and Quality FAQ

Q1: What warranty coverage is provided for the HMS01.1N-W0036-A-07-NNNN?
Every unit is covered by a 12-month warranty from the date of shipment. This covers manufacturing defects, component failures, and firmware-related malfunctions under normal operating conditions. Warranty claims are processed promptly with replacement or repair support.

Q2: Is pre-shipment testing performed on each unit?
Yes. Each HMS01.1N-W0036-A-07-NNNN undergoes functional verification prior to dispatch, including power-on self-test, communication interface check, and safety function (STO) validation. Test records are available upon request for quality audit purposes.

Q3: Is this unit compatible with existing Rexroth IndraDrive M installations?
The HMS01.1N-W0036-A-07-NNNN is fully compatible with the IndraDrive M platform, sharing the same mechanical form factor, DC bus connectors, and firmware architecture as other HMS01 series modules. It can be installed as a direct replacement in existing multi-axis cabinets without modifications to the supply unit or control wiring, provided the firmware version is MPx-18 or later.

Q4: Can long-term spare parts supply be guaranteed?
We maintain dedicated stock of the HMS01.1N-W0036-A-07-NNNN and related IndraDrive M components to support long-term maintenance programs. For facilities with extended equipment lifecycles — 10 to 20 years — we recommend establishing a consignment stock agreement to ensure availability during critical maintenance windows without lead time risk.