Bosch Rexroth HDS03.2-W075N-HS12-01-FW Replacement HDS

Product Overview

Bosch Rexroth HDS03.2-W075N-HS12-01-FW Replacement HDS: Seamless Transition & Legacy System Compatibility

The Bosch Rexroth HDS03.2-W075N-HS12-01-FW is a high-performance AC servo drive from the HDS Series, rated at 75A continuous output current and equipped with a SERCOS (Serial Real-time Communication System) interface. This unit is widely deployed in precision motion control applications across CNC machining centers, injection molding machines, printing presses, and automated assembly lines. As legacy Rexroth drive systems age or reach end-of-life, sourcing a verified replacement or upgrade path becomes a critical operational priority — and that is exactly what TOPNLMS delivers.

Whether you are replacing a failed drive on an emergency basis or executing a planned modernization of your servo axis architecture, the HDS03.2-W075N-HS12-01-FW integrates directly into existing Rexroth DIAX04, ECODRIVE03, or IndraMotion MLD control platforms without requiring rewiring of the power stage or reconfiguration of the SERCOS ring topology. The drive accepts standard 3-phase AC input (400–480 VAC), retains the same X1/X2 power connector pinout as predecessor HDS02 and HDS03 variants, and communicates natively over SERCOS I at 2 or 4 Mbps — preserving your existing NC program structure and axis parameter sets.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful servo drive retrofit rarely involves a single component. When migrating from an aging Rexroth HDS02 or DIAX04-based axis to the HDS03.2-W075N-HS12-01-FW, engineers typically address the full drive train and communication chain simultaneously to eliminate latent failure points and ensure system-level compatibility.

On the power supply side, the HVR02.2-W018N or HVR03.2-W030N regenerative power supply units are the standard companions in Rexroth HDS cabinet builds, providing the DC bus voltage that the HDS03.2 drive requires. If your existing cabinet uses an older HVE02.2 non-regenerative supply, verifying DC bus capacity against the 75A drive’s peak demand is a mandatory pre-commissioning step.

The SERCOS fiber-optic ring connecting the HDS03.2-W075N-HS12-01-FW to the CNC controller — typically a Bosch Rexroth IndraControl VCP20 or CSB02.1 SERCOS master card — must be inspected for ring integrity. Degraded plastic optical fiber (POF) cables between drive nodes are a common source of communication faults after a drive swap; replacing the SERCOS fiber segments during the retrofit window eliminates this risk.

Motor feedback wiring should be verified against the MKD071B, MKE096B, or MSK071C servo motor encoder cable pinout. Rexroth’s IKS series feedback cables are pre-assembled with the correct M23 connector for direct mating to the HDS03.2 X8 feedback port, eliminating field-wiring errors that can damage the encoder interface circuit.

For axis parameter migration, the IndraWorks DS engineering software (or the legacy DriveTop tool for older firmware sets) is used to upload axis parameters from the failed drive — if recoverable — or to re-enter the axis data from the machine’s commissioning documentation. The HDS03.2 parameter set is fully compatible with DIAX04 axis data exported in the standard Rexroth .par file format, significantly reducing re-commissioning time.

In multi-axis cabinets, the HDS03.2-W075N-HS12-01-FW shares the DC bus with adjacent drives such as the HDS02.2-W040N (40A spindle axis) or HDS04.2-W200N (200A high-torque axis). Ensuring that the shared bus capacitance and regenerative braking capacity of the HVR supply unit is not exceeded after adding the 75A axis is a critical sizing check. Terminal modules such as the HAS02.1 bus bar connector kit simplify the DC bus interconnection between drive modules in the same cabinet section.

Where the existing machine uses a Rexroth CSH01.1C or CDB01.1C controller with an analog ±10V velocity command interface rather than SERCOS, the HS12 SERCOS variant of the HDS03.2 can still be configured in analog command mode via parameter P-0-0049, preserving backward compatibility with non-SERCOS CNC controllers during a phased migration.

Retrofit Guidance FAQ

Q: Can I replace an HDS03.1-W075N with the HDS03.2-W075N-HS12-01-FW without rewiring the power cabinet?
A: Yes. The HDS03.2 retains the same X1 (AC input) and X2 (motor power) connector positions and pinout as the HDS03.1. No power wiring changes are required. Only the SERCOS fiber connections and feedback cable need to be transferred from the old drive to the new unit.

Q: Will my existing SERCOS ring configuration work with the HS12 interface?
A: The HS12 designation indicates 12 Mbps SERCOS capability, but the drive is backward compatible with 2 Mbps and 4 Mbps ring speeds. Your existing SERCOS master timing settings do not need to change.

Q: Do I need to re-enter all axis parameters after the drive swap?
A: If the original drive’s non-volatile memory is intact, parameters can be uploaded via IndraWorks DS or DriveTop before removal. If the drive has failed completely, parameters must be re-entered from the machine’s commissioning record. TOPNLMS recommends requesting the machine builder’s axis parameter backup file before any drive replacement.

Q: What feedback encoder types are supported?
A: The HDS03.2-W075N-HS12-01-FW supports resolver, EnDat 2.1/2.2, Hiperface, and incremental TTL encoder feedback via the X8 port. It is compatible with all standard Rexroth MKD, MKE, and MSK series servo motors.

Q: Is the physical cabinet space the same as the replaced drive?
A: The HDS03.2 module occupies the same standard Rexroth HDS mounting slot width (75mm for the 75A variant). No cabinet modification is required when replacing an HDS03.1 of the same current rating.

Q: What is the lead time and shipping arrangement?
A: Units in stock ship within 1–3 business days from Xiamen, China via DHL Express or FedEx International Priority. Estimated transit time to Europe and North America is 3–5 business days. All units are tested prior to shipment and include a 12-month warranty certificate.

Warranty Assurance

Every Bosch Rexroth HDS03.2-W075N-HS12-01-FW unit supplied by TOPNLMS is covered by a 12-month replacement warranty from the date of shipment. Prior to dispatch, each drive undergoes a pre-shipment functional test including power-on verification, SERCOS communication handshake check, and output stage integrity test. Units are packed in anti-static foam-lined export cartons with desiccant to prevent moisture ingress during international transit.

In the event of a warranty claim, TOPNLMS provides a replacement unit dispatch within 5 business days of fault confirmation — no extended RMA delays. Our after-sales engineering team is available via email at [email protected] to assist with installation verification, parameter questions, and compatibility confirmation before and after purchase.

For procurement teams requiring documentation, we provide a commercial invoice, packing list, and certificate of conformity with every shipment. Volume pricing is available for MRO stocking orders of 3 or more units.