Bosch Rexroth HCD90 Series Modules: HCD90 271-5818 NSLN100 NLON100 Motherboard –

Technical Dossier

Product Details And Specifications

Bosch Rexroth HCD90 Series: Comprehensive Module Range and Technical Overview

The Bosch Rexroth HCD90 series is a high-performance digital AC servo drive platform deployed across global heavy industry sectors including petrochemical refineries, nuclear power generation facilities, offshore drilling platforms, and large-scale chemical processing plants. Engineered to IEC and CE standards in Germany, the HCD90 architecture provides deterministic motion control with integrated safety functions, making it a reference-class solution for multi-axis coordinated drive systems. Its modular backplane design allows scalable configuration from single-axis to complex multi-drive topologies, and its long production lifecycle has resulted in widespread installed base across facilities with 20+ year operational horizons. The HCD90 271-5818 NSLN100 NLON100 motherboard is the central communication and logic substrate of this platform, coordinating inter-module data exchange across the HCD90 backplane bus.

The Evolution of HCD90 Architecture

The HCD90 series was introduced by Rexroth (prior to full integration into the Bosch Group) as a successor to earlier analog servo drive platforms, transitioning the product line to fully digital field-oriented control (FOC). Early HCD90 variants utilized parallel backplane communication with proprietary Rexroth SERCOS I fiber-optic ring topology for real-time axis synchronization. Mid-generation revisions introduced enhanced DSP processing cores, expanding the servo update rate and reducing interpolation cycle times to sub-millisecond levels. Later HCD90 revisions incorporated compatibility layers for PROFIBUS-DP and CANopen fieldbus protocols, extending integration capability with third-party PLCs and DCS platforms from Siemens, ABB, and Yokogawa. The series has entered its mature/end-of-life phase; Bosch Rexroth's current equivalent platform is the IndraDrive series (HCS, HMD, HMS families). However, the HCD90 remains in active service at thousands of installed sites globally, and original spare parts — particularly motherboards, power supply modules, and I/O cards — are critical for lifecycle extension without full drive replacement.

HCD90 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the Bosch Rexroth HCD90 drive system. Each module is classified by functional role within the drive architecture:

Motherboard / Logic Substrate

• HCD90 271-5818 NSLN100 NLON100: Central motherboard; manages backplane bus arbitration, inter-module communication, and system logic coordination.
• HCD90 271-5819: Alternate motherboard revision with updated firmware ROM; direct functional equivalent for field replacement.

Axis Control / Servo Amplifier Modules

• HCD90.1-W0054: Single-axis servo amplifier, 54A continuous output, for permanent magnet synchronous motors.
• HCD90.1-W0070: Single-axis servo amplifier, 70A continuous output; high-torque spindle and feed axis applications.
• HCD90.1-W0110: Single-axis servo amplifier, 110A continuous output; heavy-duty axis drives in rolling mill and press applications.
• HCD90.1-W0150: Single-axis servo amplifier, 150A continuous output; large inertia load compensation.
• HCD90.2-W0054: Dual-axis servo amplifier, 54A per axis; compact multi-axis configurations.
• HCD90.2-W0070: Dual-axis servo amplifier, 70A per axis; gantry and synchronized axis pairs.

Power Supply Modules

• HVR02.2-W0045: Regenerative power supply unit, 45kW; feeds HCD90 DC bus with active front-end rectification.
• HVR02.2-W0065: Regenerative power supply unit, 65kW; for larger multi-axis HCD90 cabinets.
• HVE02.2-W0045: Non-regenerative supply unit, 45kW; cost-optimized installations without regenerative braking requirement.

Digital I/O Modules

• HCD90 DAE01.1: Digital I/O expansion card; 16 DI / 8 DO; interfaces with external PLC safety relays and limit switches.
• HCD90 DAE02.1: Analog I/O expansion card; ±10V reference input, encoder feedback conditioning.

Communication / Fieldbus Adapter Modules

• HCD90 PROFIBUS-DP: PROFIBUS-DP slave adapter; enables integration with Siemens S7 and other DP master controllers.
• HCD90 SERCOS: SERCOS I fiber-optic ring interface card; real-time motion bus for CNC and coordinated axis control.
• HCD90 CANopen: CANopen DS402 profile adapter; for machine-level motion networks.

Encoder / Feedback Interface

• HCD90 DSF01.1: Resolver-to-digital feedback interface; supports Rexroth MKD/MKE motor resolver signals.
• HCD90 DSF02.1: EnDat 2.1 / SSI encoder interface; for high-resolution absolute position feedback.

Sourcing Hard-to-Find & Obsolete HCD90 Parts

The HCD90 series has been formally discontinued by Bosch Rexroth, with new production of most modules ceased. Authorized distribution channels no longer carry stock for the majority of HCD90 part numbers. DriveKNMS maintains a dedicated inventory of tested HCD90 spare parts sourced through certified industrial surplus channels, including the HCD90 271-5818 NSLN100 NLON100 motherboard and associated axis amplifier, power supply, and I/O modules. For facilities operating HCD90-based systems beyond the OEM support window, DriveKNMS provides lifecycle extension services including: direct part-number cross-referencing, functional equivalency assessment for substitute modules, and multi-unit procurement for planned maintenance schedules. All obsolete HCD90 inventory is held in climate-controlled storage and dispatched with full traceability documentation.

Quality Control for the HCD90 Range

The HCD90 motherboard and backplane communication modules require specialized validation procedures due to the complexity of the proprietary Rexroth bus protocol and multi-layer PCB construction. DriveKNMS applies the following test protocol to all HCD90 units prior to dispatch:

• Visual inspection under 10x magnification: solder joint integrity, capacitor condition, connector pin alignment.
• Powered bench test: DC bus energization sequence verification, firmware boot confirmation, fault code readout via Rexroth diagnostic interface.
• Backplane communication test: module-to-module data exchange validation using HCD90 test rack with known-good reference modules.
• Insulation resistance test: 500VDC megohm test on power stage isolation.
• Functional load test (amplifier modules): motor simulation load bank test at rated current output.
• Final documentation: test report issued with each unit, including serial number, test date, and pass criteria confirmation.