Description
Key Technical Specifications
- Product Model: HDS02.2-W040N-HT20-01-FW
- Manufacturer: Bosch Rexroth
- System Platform: DIAX04 Drive System
- Part Number: R911305276
- Rated Output Current: 40 A (continuous at 4 kHz PWM)
- Peak Output Current: 80 A (for max. 1 s, depending on thermal conditions)
- DC Bus Voltage Range: 530…670 VDC
- Output Voltage: 3 × 0…500 VAC
- Switching Frequency: 4 kHz / 8 kHz selectable
- Feedback System: Integrated resolver evaluation (sin/cos 1 Vpp equivalent)
- Command Interface: ±10 V analog velocity/torque + 24 V parallel digital interface (step/direction or register control)
- Digital I/O: 16 inputs / 8 outputs (24 VDC, optically isolated)
- Cooling Method: Internal air cooling with integrated high-performance blower
- Power Loss at Rated Load: ≈ 280 W
- Weight: 6.8 kg
- Dimensions (H × W × D): 498 mm × 50 mm × 308 mm
- Protection Class: IP10 (cabinet installation required)
- Ambient Temperature (Operation): +5…+45 °C (rated data); +45…+55 °C with 2.5 %/K derating
- Certification Standards: CE, cULus, compliant with EN 61800-3 (EMC) and EN 61800-5-1 (safety)
Technical Architecture & Functional Positioning
The HDS02.2-W040N-HT20-01-FW is positioned as a high-performance, stand-alone or master-slave drive within the modular DIAX04 system. Unlike the SERCOS variant (HS12), the HT20 configuration replaces the fiber-optic real-time interface with a traditional ±10 V analog command and integrated resolver evaluation, making it ideal for retrofit applications or systems where a separate motion controller provides velocity/torque setpoints via analog or parallel signals.
Its core employs a 32-bit floating-point DSP running field-oriented control algorithms at 250 µs current loop cycle time, achieving torque rise times below 2 ms — critical for fast tool changers, flying saws, and electronic gearing applications. The built-in resolver-to-digital converter supports direct connection of standard 2-pole resolvers without additional interface cards, reducing cabling complexity and improving noise immunity in harsh machine environments.
Thermal design with the internal blower maintains full 40 A rating even in densely packed cabinets, while the 50 mm narrow module width allows up to 12 axes per 600 mm rack. This architecture directly addresses common pain points in legacy upgrades: eliminating the need for obsolete SERCOS master cards while retaining full DIAX04 diagnostic and parameterization capabilities through the standard RS232/RS485 service interface.
Typical Application Scenarios
- Retrofit of older CNC machines originally equipped with analog drives, enabling precise resolver-based positioning without replacing the existing NC kernel.
- High-speed packaging and labelling lines requiring electronic line-shaft synchronization via parallel register control.
- Test stands and dynamometers where rapid torque reversal and accurate resolver feedback are mandatory.
- Printing and converting machinery using mechanical gearbox replacement with electronic gearing functions.
- Large gantry systems operating in master-slave torque sharing configurations with analog torque command distribution.
Quality Standards & Testing Procedures
We treat every DIAX04 drive as safety- and production-critical. A single latent defect can destroy motors, damage tooling or cause unplanned outages costing hundreds of thousands per hour.
