The REXROTH R911387809 HCS01.1E-W0003-A-02-B-ET-EC-NN-SB-NN-FW is a compact servo drive converter from the Rexroth HCS01 / IndraDrive Cs series. It is designed for industrial automation systems that require accurate single-axis servo control, compact cabinet installation, and dependable communication between the drive, controller, servo motor, and encoder feedback system. This model is commonly used as a machine-axis drive in automated production equipment where repeatable motion, stable torque control, and reliable parameter-based operation are required.

The complete type code HCS01.1E-W0003-A-02-B-ET-EC-NN-SB-NN-FW should be kept exactly as written in technical records, purchase orders, spare-parts lists, repair documents, export invoices, and online product pages. The order number R911387809 is also essential because many industrial buyers and maintenance engineers identify Rexroth spare parts by order number. For accurate sourcing, the safest commercial description is REXROTH R911387809 HCS01.1E-W0003-A-02-B-ET-EC-NN-SB-NN-FW Compact Servo Drive Converter.

Product Identification

The estimated net product weight is approximately 1.3 kg. This value can be used as a practical reference for product pages, quotation sheets, inventory records, spare-parts planning, and preliminary freight calculation. The final shipping weight may be higher after the drive is packed with carton material, anti-static protection, foam inserts, printed labels, or documentation. If the product is supplied as refurbished stock, used tested stock, or surplus inventory, packaging may differ from factory packaging. For commercial invoices and international shipping, the packed gross weight should be measured before dispatch.

The REXROTH R911387809 is not a general-purpose variable frequency drive. It is a compact servo drive converter intended for controlled motion applications. In a typical machine system, the drive receives command values from the automation controller, processes encoder feedback, and regulates motor output according to the selected firmware and parameter set. This enables precise control of speed, torque, position, acceleration, deceleration, and axis response.

This drive can be applied in packaging machines, labeling systems, feeding units, printing equipment, compact handling axes, assembly stations, inspection machines, textile machinery, small indexing mechanisms, and other automated production equipment. The W0003 current class indicates a compact low-current configuration, making this unit more suitable for smaller servo axes, auxiliary movements, adjustment mechanisms, and precise low-power motion sections rather than high-power main-drive applications.

Technical Application Overview

A key practical advantage of the HCS01 compact platform is its suitability for machines with limited control-cabinet space. Many modern machines use multiple smaller servo axes instead of one large mechanical transmission system. Compact drives make it easier to assign one converter to one motion section, creating a clearer relationship between the controller axis, motor, encoder, parameter set, and machine function. This structure improves troubleshooting and makes spare-parts management more precise.

The ET section in the model code should be treated as a communication-related identifier. It must be checked against the controller architecture and machine project configuration. The EC section is related to encoder interface configuration and must match the feedback system of the connected servo motor. The SB section is an important option or function code in this specific type code. It should not be ignored during replacement selection, because a visually similar HCS01.1E-W0003 drive may use a different functional configuration.

Model Code Interpretation

For maintenance replacement, the complete model code should be checked line by line against the original drive nameplate. Selecting a replacement only by the basic HCS01.1E-W0003 section is not sufficient. Similar drives may differ in communication interface, encoder interface, safety-related configuration, function code, firmware requirement, or parameter compatibility. Even small suffix differences can cause commissioning delays, controller communication faults, encoder feedback errors, or parameter transfer problems.

Before removing a failed unit, maintenance engineers should back up the drive parameters if the condition of the old drive allows it. The motor model, encoder type, brake wiring, communication configuration, controller address, and firmware version should also be reviewed. After installation, the replacement drive should be commissioned according to the machine builder’s documentation and the existing Rexroth drive project. This conservative process reduces the risk of unexpected axis movement, incorrect motor direction, brake release problems, or unresolved diagnostic alarms.

Replacement and Commissioning Checklist

The installation environment should be a protected electrical control cabinet with proper ventilation, grounding, and EMC-compliant cable routing. Power cables, motor cables, encoder cables, and communication cables should be routed according to good industrial practice. Signal wiring should be separated from high-power wiring where possible. Improper grounding or poor cable shielding can lead to unstable encoder feedback, intermittent communication alarms, or drive faults that are difficult to diagnose.

For online product publishing, this model should be presented with exact technical wording. The full product name REXROTH R911387809 HCS01.1E-W0003-A-02-B-ET-EC-NN-SB-NN-FW Compact Servo Drive Converter is suitable for Google indexing because it includes the brand, order number, full model code, product family, and product category. Industrial buyers often search with exact codes copied from old drive labels, spare-parts manuals, or electrical drawings, so the full model code should not be shortened or rewritten.

Useful search phrases for this product include R911387809, HCS01.1E-W0003-A-02-B-ET-EC-NN-SB-NN-FW, HCS01 compact servo drive, IndraDrive Cs compact converter, single-axis servo drive converter, industrial automation motion control drive, and Rexroth spare drive for machine automation. These terms should be used naturally in product headings, table fields, and descriptive paragraphs. The wording should remain technical and accurate, avoiding exaggerated compatibility claims or repeated keyword stuffing.

From a spare-parts perspective, the REXROTH R911387809 is valuable because compact servo drives are often installed in critical machine sections. A small failed axis drive may stop a complete production machine if it controls feeding, positioning, indexing, or synchronization. Keeping the correct model available can reduce downtime, but only if the exact hardware and firmware configuration matches the machine. A different suffix code may create technical problems even when the housing and current class appear identical.

For sellers and distributors, product condition should be stated separately from the model identity. If the unit is brand new, new surplus, used tested, or refurbished, that commercial condition should be listed in the offer but should not alter the technical model code. Warranty, lead time, test status, and packaging method should also be described as separate terms. This keeps the product page clear for both search engines and professional buyers.

In summary, the REXROTH R911387809 HCS01.1E-W0003-A-02-B-ET-EC-NN-SB-NN-FW is a compact single-axis servo drive converter for precise industrial motion-control applications. It belongs to the HCS01 / IndraDrive Cs compact drive platform and is suitable for cabinet-mounted servo-axis control in packaging, feeding, handling, printing, inspection, assembly, and other automated machinery. The estimated product net weight is approximately 1.3 kg, while the final gross weight should be verified after packaging. For accurate sourcing, correct replacement, and effective Google search indexing, both the order number R911387809 and the complete model code HCS01.1E-W0003-A-02-B-ET-EC-NN-SB-NN-FW should always be used together.