Description
Rexroth HDS03.2-W075N-HS12-01-FW | 75A Servo Drive
Dynamic Product Introduction
This is the kind of drive where the complete type code matters more than the family name. The HDS03.2-W075N is a high-current member of the DIAX04 platform, using a high-voltage DC bus and a SERCOS-based control architecture. The published technical record specifies 530–670 VDC input, up to 37 A input current, and an output stage capable of up to 500 VAC.
The W075N configuration is the 75 A class controller, while HS12 identifies the command-interface configuration. The final 01-FW portion should also be preserved when sourcing a replacement because firmware and application configuration are not interchangeable assumptions between otherwise similar HDS units. Current technical listings explicitly associate R911190008 with SERCOS communication and separately identify firmware as an ordered/configured item.
This is therefore a drive-system component, not a self-contained VFD that should be evaluated by connecting arbitrary AC input and a motor. The DIAX04 architecture uses the appropriate power-supply/DC-bus equipment, motor feedback, SERCOS master, cabling, and application parameters as a complete system.
HDS03.2-W075N-HS12-01-FW
Key Technical Specifications
- Manufacturer: Bosch Rexroth / Indramat
- Material Number: R911190008
- Type Code: HDS03.2-W075N-HS12-01-FW
- Series: DIAX04 HDS03.2
- Product Type: Servo drive controller / servo amplifier
- Rated Current: 75 A
- DC Input Voltage: 530–670 VDC
- Maximum Input Current: 37 A
- Output Voltage: 0–500 VAC maximum
- Output Frequency: Up to 1000 Hz in published technical records
- Command Communication: SERCOS interface
- Cooling: Internal air blower
- Protection Category: IP10
- Connections: X3 and X6
- Approximate Weight: 11 kg
- Firmware: Ordered separately / configuration dependent
- Operating Architecture: DIAX04 shared DC-bus servo system
- Application: Industrial multi-axis motion and servo-control systems
The 75 A, 530–670 VDC, 37 A input, 0–500 VAC output, 1000 Hz, SERCOS, blower-cooled and IP10 figures are supported by technical records for the exact R911190008 configuration.
I would not publish a specific motor kW rating for this exact controller based solely on the 75 A designation. Actual usable motor power depends on the motor, bus voltage, duty cycle, speed, regeneration requirements, and the complete DIAX04 configuration.
Global Sourcing & Live-Test SOP
1. Inbound identity verification
- Photograph the complete Rexroth nameplate before installation.
- Confirm HDS03.2-W075N-HS12-01-FW character by character.
- Verify material number R911190008.
- Record serial number and hardware revision.
- Confirm the installed interface/option hardware.
- Inspect the X3 and X6 connectors.
- Check the blower and cooling passages for dust accumulation or bearing noise.
- Inspect DC-bus and motor-power connection areas for heat discoloration.
- Check mounting hardware and enclosure surfaces for evidence of mechanical damage.
A supplier should not be allowed to substitute an HDS03.2-W075N with another HS configuration simply because the basic current rating matches.
2. High-voltage DC inspection
This controller operates on a 530–670 VDC class bus.
Before applying power:
- Verify the complete DIAX04 power-supply arrangement.
- Confirm DC-bus polarity and voltage.
- Verify protective-earth continuity.
- Inspect DC-bus cabling and connectors.
- Confirm appropriate discharge/bleeder arrangements.
- Use measurement equipment rated for the actual DC-bus voltage.
- Follow the applicable lockout/tagout procedure.
- Allow the DC bus to discharge before handling the power terminals.
Do not improvise a bench test using a generic DC source.
3. Functional drive test
A meaningful test should verify:
- Control-power startup.
- DC-bus acceptance.
- Diagnostic/status display.
- Blower operation.
- SERCOS communication.
- Feedback recognition.
- Parameter access.
- Fault memory.
- Motor current feedback.
- Controlled motor rotation.
- Acceleration/deceleration behavior.
- Regenerative behavior under an appropriate test load.
Where available, use the correct Rexroth DriveTop configuration environment and the machine’s saved parameter set. The exact firmware configuration should be documented before changing software.
4. Heat-run screening
For refurbished or used stock, perform a controlled extended test while recording:
- DC-bus voltage
- Motor current
- Drive temperature
- Blower operation
- SERCOS communication
- Feedback stability
- Diagnostic state
- Fault history
- Output behavior under changing load
A 24-hour monitored run is useful for identifying aging blowers, thermal faults, intermittent power-stage problems, and unstable feedback circuits.
5. Final preparation
Create a test record containing:
- R911190008
- Complete type code
- Serial number
- Hardware revision
- Firmware identification
- Parameter backup
- SERCOS configuration
- Motor/feedback configuration
- Test measurements
- Fault history
Package the controller in ESD-safe material and protect the connectors and cooling openings against impact and contamination.
Field Engineer’s Pitfall Guide
❗ Do not confuse 75 A rated current with 75 A input current
The 75 A figure belongs to the drive’s rated current specification. Published technical records identify the maximum input current as approximately 37 A on the 530–670 VDC input side. These are different electrical quantities and should not be copied interchangeably into a procurement specification.
❗ HS12 is part of the replacement identity
The HS12 suffix is associated with the SERCOS command interface. Do not replace R911190008 with an .2- carrying a different HS configuration merely because the enclosure and current rating appear identical.
On an older machine, the communication layer can be the first thing that fails after an apparently successful hardware swap.
❗ Firmware and machine parameters are not optional details
Rexroth’s records explicitly indicate that firmware is ordered separately for this HDS configuration, and one current parts record lists several compatible firmware components.
Before a migration or replacement, preserve the existing parameter set and identify the firmware installed in the failed unit. Do not perform a firmware downgrade or upgrade simply to make a surplus drive boot.
Intent-Driven FAQ
What is Bosch Rexroth ?
is the material number for .2—01-FW, a HDS Series servo drive controller.
What is the current rating?
The documented rated current is 75 A. This is the drive controller’s rated-current figure, not its AC/DC input-current rating.
What DC-bus voltage does it use?
Published technical records specify a 530–670 VDC input range. This places the controller firmly in a high-voltage industrial DC-bus architecture.
Does use SERCOS?
Yes. The configuration is documented with a SERCOS command communication interface.
What cooling system does it use?
The .2- uses an internal air blower. For used inventory, blower condition should be part of the incoming inspection and live-test SOP.
Is the firmware included?
The complete type code ends in FW, but the available technical records state that firmware is ordered separately/configured for the drive. records list several firmware components. Therefore, verify the actual firmware module/version installed in the physical unit before treating it as machine-ready.
Can another .2- replace ?
Not automatically. Verify the complete type code, interface, firmware, installed option hardware, motor feedback arrangement, SERCOS configuration, and machine parameters. A current-rating match alone is not enough.
Is still readily available as new OEM stock?
The aftermarket market currently shows both immediate-availability listings and unavailable/repair-only records, so supply status varies by source. One current industrial parts record marks the exact material number as unavailable but repairable, while other suppliers advertise stock. Treat “in stock” as seller-specific rather than proof of current OEM production status.
Procurement description: Bosch Rexroth Indramat .2—01-FW, Material No. , 75 A servo drive controller, 530–670 VDC input, SERCOS configuration, internal blower cooling.
