HDS03.2-W075N-HS12-01-FW Rexroth / Indramat DIAX04 Servo Amplifier

Description

Product Model: Rexroth
Part / Order Code: R911190008
Product Brand: Rexroth (Indramat / Bosch Rexroth)
Product Series / Family: HDS / DIAX04 Servo Drive / HDS03.2 Line

Key Features:

• 75 A rated current, supports 530–670 V input (50/60 Hz)
• SERCOS communication interface (HS12)
• Built-in blower cooling, IP10 protection rating
• Short-circuit protection, high reliability for motion control systems

Applications & Industry Context

In high-performance automation systems, the Rexroth HDS03.2-W075N-HS12-01-FW (R911190008) is a go-to servo drive used in precision motion control—especially where multiple axes must be synchronized, or high fidelity in tracking is essential. You’ll find it in applications like CNC machinery, robotics, packaging lines, printing presses, and any environment needing tight coordination between servo motors.

Its design roots lie in the DIAX04 / HDS03.2 family of drives, used widely in material handling, packaging, textile manufacturing, and general industrial machinery. Bosch Rexroth (Indramat legacy) built this line to support both legacy equipment and new system designs where reliability and deterministic control are demanded.

Because these drives are mature in the field, many OEMs and system integrators continue using them—especially in retrofit or maintenance projects—rather than redesigning entire drive architectures. Their modularity and spare-part availability (or refurbishment options) keep them viable in long-lifecycle plants.

Product Role & System Fit

The HDS03.2-W075N-HS12-01-FW, with its order code R911190008, acts as a servo amplifier / drive controller. In a motion control system, it sits between the motion command (from PLC, motion controller, or SERCOS master) and the servo motor, converting digital commands into precise current, voltage, and frequency for motor phases.

In a multi-axis setup, the drive is typically one axis of a rack or distributed drive network. It communicates over the SERCOS interface (HS12 variant), allowing deterministic looping and synchronous updates. Its 75 A rating aligns it with medium-to-high power servo motors for moderately heavy loads.

This module matches best when:

• You need high repeatability and low phase error in motion loops
• The system uses or supports SERCOS networks
• You require a field-proven drive with support for diagnostics, parameterization, feedback correction
• You have an existing infrastructure of Indramat / Rexroth HDS / DIAX04 drives and want compatibility

Because of its standard pinouts and mechanical dimensions, it often drops in as a replacement or complementary unit in existing drive shelves. That makes it easier to maintain drive families without wholesale redesigns.

Technical Features & Benefits

Let’s dig into what sets the HDS03.2-W075N-HS12-01-FW apart:

Power & Current Handling
This drive is rated for 75 A nominal current output, with capability for higher transient or peak loads depending on configuration.  The rated input voltage range is 530–670 V (AC 50–60 Hz).  Internally, the drive is designed to supply up to 40 A continuous in many configurations, depending on frequency and load.

Command & Feedback Interface
Communication is via SERCOS (HS12 variant), giving precise, deterministic servo feedback and synchronized command execution.  This ensures minimal jitter and tight motion control—especially useful in multi-axis systems.

Cooling & Protection
The drive houses a blower-cooled internal fan (air blower) to maintain thermal regulation in a compact enclosure.  Its protection classification is IP10, meaning it tolerates limited dust ingress but should be mounted in controlled environments. Short-circuit protection (SCCR) is robust—capable of handling up to 42,000 A fault conditions in the DC bus.

Performance & Losses
Despite high power, the drive is designed with efficiency in mind. Thermal losses are quoted (in some manufacturer catalogs) at about 220 W under nominal load conditions.  The compact design and built-in cooling help maintain stable performance even when ambient conditions fluctuate.

Diagnostics & Parameterization
Being part of the Indramat / HDS family, this drive supports advanced parameterization and error diagnostics via the SERCOS link or dedicated service tools. Error codes such as over-temperature, DC-bus undervoltage, encoder faults, or following errors are standard.  This capability reduces troubleshooting time in real-world installations.

Because it’s part of the DIAX04 architecture, firmware updates and control modes are consistent with other HDS / DIAX drives, facilitating easier maintenance and spare interchange.

Technical Specifications

Installation & Maintenance Insights

Installing an HDS03.2-W075N-HS12-01-FW (R911190008) drive requires attention to several practical considerations that often distinguish reliable systems from troublesome ones:

1. Ventilation & Airflow
   While the drive includes internal blower cooling, it must be mounted in a cabinet or frame that supports unrestricted air intake and exhaust. Avoid blocking the blower path or mounting it adjacent to heat-producing components. In heavy-duty plants, supplemental forced ventilation helps maintain long-term stability.
2. Wiring & Grounding
   Use shielded, appropriately gauged cables for motor connections and DC bus lines. Ensure all shielding is grounded to a common point. Routing control cables separately from power lines helps reduce EMI and feedback interference. Tighten all terminal connections to the manufacturer’s specified torque (often 3–6 Nm), especially for DC bus connections.
3. Bus Redundancy & Safety
   In systems with multiple axes, maintain correct SERCOS network wiring (ring or line) and ensure proper termination. Always include a DC bus link with appropriate fusing or protection to safeguard against bus faults.
4. Initial Commissioning
   Before applying full load, power up the drive under no-load or minimal load conditions. Verify that initial diagnostics pass and that parameters (motor constants, feedback scaling, limits) are configured step by step. Use the servo parameterization tools to tune gain, acceleration, deceleration, and velocity profiles carefully.
5. Thermal Monitoring & Maintenance
   Periodically inspect the blower, dust filters, and ambient temperature. Over time, dust or obstructions can restrict airflow and cause heat buildup. Replace the blower fan and inspect PCB components (capacitors, connectors) at scheduled intervals (e.g. yearly or per plant maintenance cycle).
6. Spare & Redundancy Strategy
   Maintain a pre-configured spare drive of the same model (HDS03.2-W075N-HS12-01-FW) so you can swap quickly in case of failure. Because the DIAX04 / HDS family maintains consistent firmware and parameter protocols, replacement and system recovery can be done rapidly—minimizing downtime.
7. Error Monitoring & Reset
   Many faults such as over-temperature, following error, feedback mismatch, or DC undervoltage can be automatically reset after corrective actions (e.g. cooling, parameter adjustment). Ensure that the HMI or SCADA interfaces monitor these fault registers, and that operators can reset or log them for preventive maintenance.