The REXROTH R911337831 HCS01.1E-W0003-A-02-A-CC-EC-ET-NN-NN-FW is a compact servo drive converter designed for precise single-axis motion control in industrial automation equipment. This product belongs to the Rexroth IndraDrive Cs / HCS01 compact converter platform, a drive family developed for applications that require controlled motor output, compact cabinet installation, and reliable communication with modern machine control systems.

This model is identified by the order number R911337831 and the full type code HCS01.1E-W0003-A-02-A-CC-EC-ET-NN-NN-FW. For maintenance engineers and spare-parts buyers, both references should be used together. The order number helps confirm the commercial configuration, while the complete type code gives more detailed information about the power section, control section, communication interface, encoder interface, safety option, and firmware-related configuration. For replacement use, checking only “HCS01.1E-W0003” is not sufficient.

The HCS01.1E-W0003 power class is intended for smaller servo axes. It is commonly associated with a 3.3 A maximum current class and an approximate net product weight of 1.39 kg. This makes it suitable for compact control cabinets, low-power positioning axes, small handling units, auxiliary machine axes, and servo-driven mechanisms where accuracy is more important than high output power.

Product Identification Table

The main role of this compact converter is to control the electrical output supplied to a servo motor. In a complete automation system, the drive receives commands from the machine controller and regulates motor behavior according to speed, torque, or position requirements. This allows the connected motor to perform repeatable motion with accurate acceleration, deceleration, and stop control.

Because this unit is compact, it is especially useful in machines where cabinet space is limited. Instead of using a large drive module for a small servo axis, machine builders can use the HCS01 compact converter to reduce space consumption while maintaining stable motion performance. This is important in packaging machines, electronic assembly equipment, inspection machines, laboratory devices, compact handling systems, and machine tools with auxiliary positioning axes.

Main Functional Characteristics

The option structure of HCS01.1E-W0003-A-02-A-CC-EC-ET-NN-NN-FW is important. The “ET” section indicates an Ethernet-related communication configuration. The “NN-NN” sections indicate that certain optional functions are not installed or not specified in those positions. This is different from similar HCS01 units that may include safety options such as L3 or S4. Therefore, this model should not be treated as automatically interchangeable with another HCS01.1E-W0003 unit that has a different final option code.

For example, a drive with ET-L3-NN-FW and a drive with ET-NN-NN-FW may look very similar from the outside, but the safety and option configuration may not be the same. In practical replacement work, this can affect commissioning, parameter loading, machine safety behavior, and compatibility with the original automation program. The safest approach is to confirm the complete model code from the existing nameplate before ordering.

Typical Application Areas

The REXROTH R911337831 HCS01.1E-W0003-A-02-A-CC-EC-ET-NN-NN-FW is not designed as a high-power main spindle drive. Its value is in compact, precise, low-power motion control. When matched with the correct servo motor and feedback system, it can support smooth axis movement and repeatable machine performance. For production lines where downtime is expensive, having the correct replacement drive can reduce troubleshooting time and help restore machine operation faster.

Before installation, the cabinet environment should be checked. Servo drives require correct grounding, stable input power, proper shielding of motor and encoder cables, and enough ventilation. Even a compact drive can generate heat during operation. Poor cabinet airflow, dust accumulation, loose terminals, incorrect parameter files, or damaged motor cables can cause faults that may be incorrectly blamed on the drive. For this reason, a full electrical and mechanical inspection is recommended before replacing the converter.

Replacement and Purchasing Checklist

For export and online product listing purposes, this product can be described as a compact single-axis servo drive converter for industrial automation equipment. If a shipping document is prepared, the product weight should be separated into net weight and gross weight. The approx. 1.39 kg value is appropriate as a product net weight reference. Gross weight may be higher depending on carton size, protective foam, anti-static packaging, and export packing requirements.

Suggested Product Listing Description

The REXROTH R911337831 HCS01.1E-W0003-A-02-A-CC-EC-ET-NN-NN-FW is a practical spare part for compact motion-control systems that use the Rexroth HCS01 drive platform. It offers a small installation footprint, precise servo control capability, and configuration-specific integration for industrial machines. Its compact structure makes it suitable for low-power axes where control accuracy, reliable communication, and cabinet space efficiency are important.

For buyers, the most important point is configuration accuracy. Many HCS01 compact converters have similar front labels and similar mechanical dimensions, but they are not always interchangeable. The order number R911337831, the model code HCS01.1E-W0003-A-02-A-CC-EC-ET-NN-NN-FW, the firmware condition, and the machine parameter set must all be checked before final purchase or installation. When these details are confirmed correctly, this compact converter can serve as a dependable replacement unit or spare drive for automated production equipment.