The REXROTH R911379908 HCS01.1E-W0003-A-02-B-ET-EC-EP-NN-NN-FW is a compact single-axis servo drive converter designed for low-power industrial motion-control applications. It belongs to the Rexroth HCS01 compact converter platform, a drive system family commonly used in IndraDrive Cs automation architectures. This unit is intended for machines that require accurate servo motor control, compact cabinet installation, stable communication integration, and exact configuration matching.

The product is identified by the material number R911379908 and the complete type code HCS01.1E-W0003-A-02-B-ET-EC-EP-NN-NN-FW. For purchasing, replacement, repair, and technical confirmation, both references should be used together. The shortened base model HCS01.1E-W0003 only identifies the general small-current compact converter class. It does not fully describe the option structure of the drive. The ending B-ET-EC-EP-NN-NN-FW is therefore critical when selecting this unit as a spare part.

Unlike a general-purpose inverter for ordinary asynchronous motor speed regulation, this product is a servo drive converter for controlled motion systems. It is intended to work with the correct servo motor, feedback device, communication setup, firmware, and parameter set. When properly matched, it can support accurate positioning, smooth speed regulation, repeatable start-stop behavior, and controlled torque-related movement in compact automated equipment.

Product Identification Table

The key feature of this configuration is the EP-NN-NN-FW ending. This makes it different from the closely related EP-L3-NN-FW version. Although both variants may share the same HCS01.1E-W0003 base power class and similar external housing, the option string is not the same. The NN field means that the corresponding option position is not populated or not specified in that code position. Therefore, this model should not be described as having the L3 safety configuration unless the original nameplate and technical documentation confirm it.

Type Code Interpretation

The EP option field is the main configuration point for this model. It should not be casually replaced by EM, EC, CN, PB, RP, or NN without technical confirmation. In practical maintenance work, two HCS01 compact converters may look similar but behave differently during commissioning because their option fields, firmware condition, fieldbus settings, feedback configuration, or machine parameters do not match.

For this reason, the correct selection method is to compare the full nameplate code from the old unit with the replacement unit. Matching only HCS01.1E-W0003 is not enough. The full model HCS01.1E-W0003-A-02-B-ET-EC-EP-NN-NN-FW and the material number R911379908 should both be confirmed before ordering.

Main Product Features

The compact design is suitable for machine builders and maintenance teams working with limited cabinet space. Modern automation cabinets often contain PLCs, power supplies, terminal blocks, safety relays, communication modules, contactors, and several servo converters. A compact HCS01 converter helps reduce installation density while still providing controlled motion for one servo axis.

The approximate 1.39 kg net weight is suitable for product pages, spare-parts catalogs, quotation sheets, and preliminary export descriptions. For actual shipment, the packed gross weight should be measured separately. Anti-static packaging, foam protection, carton material, moisture protection, and outer export packing can increase the final shipping weight. For commercial documents, this item can be described as a compact servo drive converter for industrial automation equipment.

Typical Application Areas

In packaging machinery, this drive may be used for label feed control, film movement, cutter positioning, or small indexing systems. In assembly equipment, it may control a compact actuator, a fixture adjustment unit, or a small rotary positioning mechanism. In electronics manufacturing, it may support inspection stages, alignment tables, or compact gantry modules. These applications typically require repeatable movement, stable axis response, and precise integration with the machine controller.

The drive is not intended for high-power pump drives, fan drives, spindle drives, or ordinary motor speed regulation. Its proper role is compact servo-axis control. Using it outside that role may cause compatibility problems and poor system behavior.

Replacement and Installation Checklist

Correct replacement requires more than matching the current class. A servo-axis fault may be caused by the drive itself, but it may also come from the connected motor, encoder cable, motor power cable, brake circuit, poor grounding, weak shielding, unstable input supply, cabinet overheating, or parameter mismatch. Replacing the converter without checking these surrounding conditions may lead to repeated faults.

If the unit is supplied as used or refurbished stock, the inspection should include the housing, nameplate, terminal blocks, front connectors, connector pins, cooling area, and signs of overheating or contamination. A functional test is recommended before final installation, especially when machine downtime is costly.

Suggested SEO Product Listing Information

For Google-indexed product pages, the material number and full type code should appear naturally in the title, product table, and body text. Buyers may search for R911379908, HCS01.1E-W0003-A-02-B-ET-EC-EP-NN-NN-FW, HCS01 compact servo converter, IndraDrive Cs converter, or single-axis servo drive converter. Including these exact phrases in readable technical content helps engineers and procurement teams identify the correct spare part.

The REXROTH R911379908 HCS01.1E-W0003-A-02-B-ET-EC-EP-NN-NN-FW is a configuration-specific compact servo drive converter for low-power industrial motion-control axes. Its value comes from compact cabinet installation, accurate servo regulation, Ethernet-related integration capability, and exact option-code matching. The EP-NN-NN-FW ending should be treated as technically significant, especially when comparing it with the EP-L3 version. When the full model code, firmware condition, communication setup, parameter set, and connected servo motor system are correctly verified, this unit can serve as a reliable spare converter for packaging machinery, assembly systems, inspection equipment, material-handling devices, and other automated production machines.