Bosch Rexroth IndraDrive RD52 Series Drives RD52.1-4B-011-L-NN-NN-NN-FW

Technical Dossier

Product Details And Specifications

Bosch Rexroth IndraDrive RD52 Series Technical Notes

The Bosch Rexroth IndraDrive RD52 series represents a mature, field-proven line of AC servo drive controllers deployed across global heavy industry sectors including petrochemical processing, nuclear power auxiliary systems, offshore drilling platforms, steel rolling mills, and large-scale paper and pulp manufacturing. Characterized by its modular architecture and deterministic real-time control, the RD52 platform has accumulated significant installed base in applications where drive replacement cycles span 10–20 years. The series supports multi-axis synchronization, closed-loop torque/speed/position control, and integrates directly with Bosch Rexroth IndraControl and IndraMotion MLC motion logic controllers via SERCOS III and PROFIBUS-DP fieldbus interfaces. Its ruggedized design meets IEC 61800-3 EMC requirements and is rated for continuous operation in ambient temperatures up to 45°C, making it suitable for demanding industrial environments without additional derating.

The Evolution of RD52 Architecture

The IndraDrive RD52 series is the second-generation successor to the Rexroth ECODRIVE Cs (DKC) and IndraDrive C (HCS) platforms. Early IndraDrive variants (circa 2002–2006) used the IndraDrive Firmware FWA-INDRV*-MPH, which provided basic positioning and speed control. The RD52 generation introduced a unified firmware architecture (FWA-INDRV*-MPB and FWA-INDRV*-MPE) that consolidated motion, safety, and communication stacks into a single firmware image, eliminating the need for separate communication firmware cards used in predecessor HCS02/HCS03 units.

Compatibility considerations are critical for maintenance engineers: RD52 drives use the MSK and MKE motor encoder interface, which is electrically incompatible with older MDD/MKD motor feedback cables without adapter harnesses. The SERCOS III ring topology used in RD52 installations is backward-compatible with SERCOS II at the protocol level but requires firmware version MPB-18 or higher for full feature parity. Engineers migrating from DKC01/DKC02 controllers to RD52 must account for parameter set restructuring — P-0-0001 through P-0-0556 parameter blocks are not directly transferable and require re-commissioning via IndraWorks DS engineering software.

RD52 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked models within the Bosch Rexroth IndraDrive RD52 series. Models are classified by functional role:

Servo Drive Controllers (Single-Axis)

• RD52.1-4B-011-L-NN-NN-NN-FW: Single-axis IndraDrive, 11A cont. output, 400V 3-phase, SERCOS III, no safety option
• RD52.1-4B-018-L-NN-NN-NN-FW: Single-axis IndraDrive, 18A cont. output, 400V 3-phase, SERCOS III interface
• RD52.1-4B-028-L-NN-NN-NN-FW: Single-axis IndraDrive, 28A cont. output, 400V 3-phase, SERCOS III interface
• RD52.1-4B-040-L-NN-NN-NN-FW: Single-axis IndraDrive, 40A cont. output, 400V 3-phase, high-dynamic servo axis
• RD52.1-4B-060-L-NN-NN-NN-FW: Single-axis IndraDrive, 60A cont. output, 400V 3-phase, heavy-duty spindle/servo
• RD52.1-4B-075-L-NN-NN-NN-FW: Single-axis IndraDrive, 75A cont. output, 400V 3-phase, high-power axis control

Servo Drive Controllers (with Integrated Safety — STO/SS1)

• RD52.1-4B-011-L-NN-NN-S1-FW: 11A single-axis drive, SIL2/PLd integrated Safe Torque Off (STO) safety function
• RD52.1-4B-018-L-NN-NN-S1-FW: 18A single-axis drive, STO + Safe Stop 1 (SS1) certified safety option
• RD52.1-4B-028-L-NN-NN-S1-FW: 28A single-axis drive, integrated functional safety, IEC 62061 compliant
• RD52.1-4B-040-L-NN-NN-S1-FW: 40A single-axis drive, STO/SS1/SLS safety functions, safety-rated encoder interface

Dual-Axis Controllers

• RD52.2-4B-011-L-NN-NN-NN-FW: Dual-axis IndraDrive, 2×11A, shared DC bus, compact multi-axis configuration
• RD52.2-4B-018-L-NN-NN-NN-FW: Dual-axis IndraDrive, 2×18A, shared DC bus, SERCOS III dual-node

Supply Units / Power Sections

• HMV01.1E-W0030-A-07-NNNN: Regenerative mains supply unit, 30kW, compatible with RD52 DC bus rail
• HMV01.1E-W0075-A-07-NNNN: Regenerative mains supply unit, 75kW, for large RD52 multi-axis cabinets

Communication & Option Modules

• RD52.1-4B-011-L-PN-NN-NN-FW: RD52 variant with PROFINET IO interface replacing SERCOS III
• RD52.1-4B-011-L-PB-NN-NN-FW: RD52 variant with PROFIBUS-DP slave interface for legacy PLC integration

Quality Control for the RD52 Range

The RD52 series presents specific test challenges due to its integrated SERCOS III ASIC, multi-layer power PCB, and dual-port DC bus capacitor bank. DriveKNMS applies the following test protocol to all RD52 units prior to dispatch:

• DC Bus Capacitor ESR Test: Capacitance and equivalent series resistance measured at 100Hz and 1kHz; units with ESR deviation >15% from factory spec are reconditioned or rejected.
• IGBT Gate Drive Integrity: Each phase leg tested under controlled load conditions to verify switching waveform symmetry and dead-time compliance.
• Firmware Version Verification: Firmware version read via IndraWorks DS; units are updated to the latest stable MPB release unless customer specifies a legacy version for compatibility.
• SERCOS III Ring Communication Test: Drive placed in a live SERCOS III ring with a reference controller; phase 0–4 initialization verified, cyclic data exchange confirmed at 250μs cycle time.
• Thermal Imaging Under Load: Unit operated at 80% rated current for 30 minutes; thermal camera inspection confirms no hotspots on power modules, gate drivers, or control board.
• Safety Function Validation (S1 variants): STO input tested per IEC 62061 test procedure; response time measured and logged against SIL2 requirements.

Q: How is condition confirmed before quotation?
A: Available condition, photos, test records and documentation are checked according to the requested model and sourcing channel before a formal RFQ response.