Rexroth HDS03.2-W100N-HS37-01-FW Retrofit Servo Drive Legacy

Rexroth HDS03.2-W100N-HS37-01-FW Retrofit Servo Drive Legacy: Retrofit-Compatible Servo Drive Controller for Legacy IndraDrive Systems

The Rexroth HDS03.2-W100N-HS37-01-FW is a high-performance servo drive controller from Bosch Rexroth’s HDS series, designed for precision motion control in demanding industrial automation environments. As legacy IndraDrive HDS systems approach end-of-life and original spare parts become increasingly scarce, the HDS03.2-W100N-HS37-01-FW represents a critical retrofit and replacement solution for manufacturers operating aging servo control platforms in automotive assembly, machine tool, printing, plastics, and packaging industries. This unit delivers 100A continuous output current with HS37 firmware compatibility, making it a direct functional replacement for discontinued HDS03.2 variants across a wide range of legacy control cabinet configurations.

Engineers and maintenance teams sourcing this drive for retrofit projects will find it fully compatible with existing Rexroth IndraDrive infrastructure, including standard SERCOS II and analog interface configurations. The HDS03.2-W100N-HS37-01-FW supports seamless integration into existing control architectures without requiring full system redesign, significantly reducing retrofit cost and downtime exposure. Each unit supplied by NINERMAS undergoes pre-shipment functional testing and is backed by a 12-month warranty, ensuring confidence in mission-critical replacement scenarios.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

Successful integration of the HDS03.2-W100N-HS37-01-FW into a legacy production line requires systematic pre-retrofit planning across several interdependent subsystems. The following guidance addresses the most common engineering checkpoints encountered during HDS series drive replacement projects.

Power Supply and DC Bus Capacity: The HDS03.2-W100N-HS37-01-FW operates from a shared DC bus supplied by Rexroth HVR01.2 or HVE01.2 regenerative supply modules. Before installation, calculate the total continuous and peak current demand across all drives sharing the bus. If the existing supply module is undersized for the replacement drive’s 100A rating, a supply upgrade or load redistribution may be required. In multi-axis cabinets, the HDS04.2-W200N drives on adjacent axes must also be factored into bus loading calculations.

Terminal Wiring and Connector Adaptation: The X1 power connector and X8 motor output terminal assignments on the HDS03.2-W100N-HS37-01-FW follow standard HDS03.2 pinouts. Technicians replacing an HDS03.1 predecessor should verify that the motor cable shield termination and PE grounding points are correctly adapted. IKS0374 encoder cables and IKS4028 motor power cables are the recommended Rexroth-compatible accessories for maintaining signal integrity and EMC compliance during retrofit.

Backplane and Rack Interface: In control cabinet configurations using Rexroth IndraDrive modular racks, the HDS03.2-W100N-HS37-01-FW slots into the standard HDS03.2 position without backplane modification. However, if the cabinet also houses HMS01.1N-W0054 multi-axis servo modules or CSB01.1C servo drive controllers on a shared communication backbone, the SERCOS ring address assignment must be updated in the PLC program to reflect the new drive’s node address.

Firmware and Program Compatibility: The -FW suffix on the HDS03.2-W100N-HS37-01-FW indicates that the HS37 firmware is pre-loaded at the factory. Before commissioning, verify that the firmware version is compatible with the IndraControl L45 or IndraControl VCP controller managing the axis. If the existing program was developed under an earlier firmware baseline, a parameter migration using Rexroth’s IndraWorks DS engineering software may be required. Retain a backup of the original axis parameters (P-0-0001 through P-0-0300 range) before any firmware update.

HMI Screen and Alarm Mapping: Legacy HMI panels connected via Profibus DP or serial RS-232 to the drive’s diagnostic interface may display drive-specific fault codes. After replacing the drive, verify that the HMI alarm text library references the correct HDS03.2 fault code table. If the system uses a Rexroth VCP05 or VCP20 operator panel, update the drive parameter display pages to reflect the new unit’s parameter set.

Signal Isolation and I/O Expansion: In applications where the HDS03.2-W100N-HS37-01-FW interfaces with third-party PLCs via analog ±10V speed reference or digital enable signals, signal isolators may be required to protect the drive’s control inputs from ground loop interference. CFL01.1-E1 line filter modules installed upstream of the drive also require inspection to confirm their current rating matches the replacement drive’s input requirements.

Installation Space Confirmation: The HDS03.2-W100N-HS37-01-FW maintains the same physical envelope as the original HDS03.2 series. Confirm minimum air clearance of 80mm above and below the unit for adequate cooling airflow. In densely populated cabinets also housing SUP-E02-GS power supply modules and DKC02.3-040-7-FW legacy drive controllers, thermal management must be re-evaluated after the retrofit to prevent derating.

Downtime Control During System Migration

Minimizing unplanned downtime during an HDS03.2-W100N-HS37-01-FW retrofit is achievable through disciplined pre-commissioning preparation. The following practices are recommended for maintenance teams operating under tight production schedules.

Pre-Staging and Parameter Backup: Before the scheduled maintenance window, pre-stage the replacement HDS03.2-W100N-HS37-01-FW by loading the backed-up axis parameters from the original drive using IndraWorks DS. This eliminates parameter entry time during the live replacement window and reduces the risk of commissioning errors under time pressure. A complete parameter set transfer typically takes 15–30 minutes in a controlled environment.

Protecting Original Program Logic: The original PLC program and motion profile stored in the IndraControl L45 or connected CNC controller must not be modified during the drive swap. The drive replacement is a hardware-level operation; the control program remains resident in the controller. Confirm that the SERCOS communication ring is properly re-initialized after the new drive is powered on, as the ring topology requires all nodes to be present before the controller transitions to operational mode.

Phased Commissioning: After physical installation and wiring verification, commission the replacement drive in a no-load test mode before reconnecting the motor. Verify encoder feedback signal quality, DC bus voltage stability, and drive enable logic before applying load. This phased approach isolates potential wiring errors before they can cause motor damage or safety system activation.

Field Calibration and Acceptance: Final commissioning includes a full-speed, full-load test cycle to confirm that the replacement HDS03.2-W100N-HS37-01-FW matches the performance profile of the original drive. Document the commissioning results, including peak current draw, position accuracy, and thermal readings, as part of the retrofit acceptance record. NINERMAS provides a pre-shipment test report with each unit to serve as the baseline reference for field acceptance testing.

Retrofit Support FAQ

Q1: Is the HDS03.2-W100N-HS37-01-FW a direct replacement for the HDS03.2-W100N-HS32-01-FW?
A: The HDS03.2-W100N-HS37-01-FW and HDS03.2-W100N-HS32-01-FW share the same power stage and mechanical form factor. The difference lies in the firmware version (HS37 vs. HS32). In most applications, the HS37 firmware is backward compatible with HS32-based parameter sets, but a parameter review using IndraWorks DS is recommended before commissioning to confirm compatibility with your specific controller version.

Q2: What pre-shipment testing does NINERMAS perform on the HDS03.2-W100N-HS37-01-FW?
A: Each HDS03.2-W100N-HS37-01-FW unit undergoes a functional power-on test, firmware version verification, DC bus charging circuit check, and encoder interface continuity test before shipment. A test report is included with each unit. The 12-month warranty covers manufacturing defects and functional failures under normal operating conditions from the date of shipment.

Q3: Can the HDS03.2-W100N-HS37-01-FW be used with non-Rexroth motors?
A: The HDS03.2-W100N-HS37-01-FW is optimized for use with Rexroth MSK, MHD, and MKD series servo motors. Use with third-party motors is possible if the motor’s electrical parameters (inductance, resistance, encoder type) are within the drive’s configurable range. Motor data must be entered manually into the drive’s parameter set using IndraWorks DS, and a full commissioning cycle is required to validate performance and safety function operation.

Q4: What is the lead time and inventory availability for the HDS03.2-W100N-HS37-01-FW?
A: NINERMAS maintains reserved inventory of HDS series drives to support urgent retrofit and breakdown replacement requirements. Standard lead time for in-stock units is 3–7 business days for international shipment. For projects requiring multiple units or long-term supply commitments, NINERMAS offers reserved stock programs to guarantee availability and protect against supply chain disruptions affecting discontinued Rexroth HDS series components.