Bosch Rexroth HCS01.1E-W0018-A-03-E-S3-EC-NN-NN-NN-FW AC Servo Drive – IndraDrive Cs

Bosch Rexroth HCS01.1E-W0018-A-03-E-S3-EC-NN-NN-NN-FW — Single-Axis Compact Servo Drive in the IndraDrive Cs Architecture

The HCS01.1E-W0018-A-03-E-S3-EC-NN-NN-NN-FW is a single-axis compact servo drive from Bosch Rexroth’s IndraDrive Cs platform. Within a closed-loop motion control architecture, this unit occupies the position of the axis controller: it receives position, velocity, or torque setpoints from a higher-level EtherCAT master, executes the current control loop at a fixed PWM switching frequency, and returns actual-value feedback to the master within the same EtherCAT cycle. The W0018 current rating — 18 A continuous — places this drive in the mid-range of the Cs family, suitable for servo motors with shaft power outputs typically between 0.75 kW and 2.2 kW depending on bus voltage and motor winding configuration.

The drive’s internal architecture separates the control board (DSP-based, handling current regulation, fieldbus stack, and safety logic) from the power stage (IGBT bridge, DC-link capacitor bank, and gate driver circuitry). This physical separation allows the control firmware to maintain deterministic cycle execution independent of thermal events on the power stage, which is a measurable advantage in high-cycle-rate applications such as pick-and-place or press-brake servo axes.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The HCS01.1E power stage uses a three-phase IGBT bridge operating at a fixed 16 kHz switching frequency. At this frequency, the current ripple on the motor windings is reduced to a level that allows the DSP-based current controller to execute a full proportional-integral (PI) regulation cycle within 62.5 µs — one switching period. This tight coupling between switching frequency and control cycle eliminates the need for additional averaging filters in the current feedback path, which would otherwise introduce phase lag and reduce the achievable current control bandwidth.

The DC-link capacitor bank is sized to absorb regenerative energy pulses from deceleration events without triggering an overvoltage fault on short duty cycles. For sustained regenerative loads — vertical axes or high-inertia flywheels — an external braking resistor (Rexroth HLB series) connects to the dedicated chopper transistor output on the drive’s power connector. The chopper threshold voltage is factory-set and firmware-adjustable within a defined range.

EMC Architecture: The drive’s control board is galvanically isolated from the power stage via optocoupler barriers on all gate drive signals and current measurement paths. The EtherCAT physical layer uses transformer-coupled RJ45 ports, providing 1.5 kV isolation between the fieldbus cable shield and the drive’s internal ground reference. This isolation architecture means that a ground fault on the fieldbus cable does not propagate a common-mode voltage spike into the current measurement circuitry — a failure mode that causes nuisance trips in drives with non-isolated fieldbus implementations.

Safety Logic (S3 variant): The STO function is implemented on a dedicated safety microcontroller that monitors the dual-channel 24 V STO input independently of the main DSP. When both STO channels drop simultaneously, the safety controller disables the IGBT gate drivers within the response time specified in the safety datasheet (typically <10 ms). The main DSP is not involved in this path, which means a firmware fault on the DSP cannot prevent STO from activating — a requirement for SIL 2 / PLd certification. SS1 (Safe Stop 1) is implemented by commanding a controlled deceleration ramp via the fieldbus before activating STO, with a configurable time delay.

Encoder Feedback Processing: The EnDat 2.2 interface on the feedback connector supports single-turn and multi-turn absolute encoders with resolutions up to 23-bit per revolution. The drive reads encoder position data synchronously with the current control cycle, ensuring that the position value used in the velocity calculation is never more than one 62.5 µs cycle old. For Hiperface encoders, the drive performs automatic motor identification (reading motor nameplate data stored in the encoder EEPROM) during power-up, eliminating manual parameter entry for matched Rexroth motor-drive pairs.

System Integration Benefits

• Deterministic EtherCAT Synchronization: The drive’s EtherCAT slave controller (ESC) uses distributed clocks (DC) to align its internal timer with the EtherCAT master clock to within ±100 ns. This allows multi-axis electronic gearing and cam profiles to execute with axis-to-axis jitter below 1 µs — a requirement for flying shear, cross-cutting, and registration control applications.
• Transparent Drive Diagnostics via CoE: All internal drive parameters, fault codes, warning states, and actual-value data are accessible as CANopen over EtherCAT (CoE) objects. A SCADA or HMI system can read motor temperature, DC-link voltage, output current, and encoder position in real time without interrupting the motion control cycle, enabling condition-based maintenance without additional hardware.
• Reduced Cabinet Footprint: The 45 mm installation width allows 22 axes to be mounted in a standard 1000 mm wide cabinet section, compared to 10–14 axes with conventional 75–100 mm wide drives. This directly reduces cabinet steel, wiring harness length, and cooling load per axis.
• Integrated Safety Eliminates External Relays: On-board STO/SS1 removes the need for external safety relay modules (e.g., Pilz PNOZ, Sick i10-Lock) per axis. For a 10-axis machine, this eliminates 10 relay modules, associated wiring, and DIN rail space — a measurable reduction in BOM cost and panel assembly time.
• Auto-Identification of Rexroth Motors: Hiperface and EnDat encoder EEPROM readback during power-up automatically loads motor-specific current limits, thermal model parameters, and commutation offset. This eliminates a class of commissioning errors caused by mismatched motor parameters and reduces first-axis commissioning time.
• Wide Input Voltage Tolerance: The 200–480 V AC input range covers 200 V (Japan/US low-voltage), 230 V (single-phase-derived), 400 V (EU standard), and 480 V (US industrial) mains without hardware modification. Machine builders can ship a single drive variant globally, reducing spare parts inventory and documentation overhead.
• IndraWorks DS Oscilloscope Function: The commissioning software includes a 4-channel software oscilloscope that captures internal drive signals (current setpoint, actual current, velocity error, position error) at the 62.5 µs control cycle rate. This allows control loop tuning and fault diagnosis without external measurement equipment, reducing commissioning time on-site.
• Firmware-Selectable Operating Modes: The standard FW firmware supports position control (cyclic synchronous position, CSP), velocity control (CSV), torque control (CST), and homing modes as defined in the CiA 402 drive profile. Mode switching is performed via EtherCAT CoE objects without power cycling, allowing the host controller to reconfigure axis behavior dynamically during a machine cycle.

Quality Assurance & Global Logistics

Every HCS01.1E-W0018-A-03-E-S3-EC-NN-NN-NN-FW unit dispatched from our Xiamen, China facility undergoes a structured pre-shipment verification protocol:

• Visual & Mechanical Inspection: Connector pin integrity, housing condition, label authenticity, and firmware version label verification against Bosch Rexroth official part number records.
• Power-On Functional Test: 24 V DC control power applied; drive boot sequence verified; no active fault codes confirmed; EtherCAT link-up tested where test bench is available.
• Genuine Origin Verification: Units sourced exclusively from authorized Bosch Rexroth distribution channels, OEM decommission programs, or certified industrial surplus suppliers. No third-party remanufacturing.
• 12-Month Warranty: All units carry a 12-month replacement warranty from dispatch date. Warranty claims are processed within 5 business days of receipt of the returned unit.
• Export Packaging: Anti-static bag, foam-lined carton, and moisture-barrier outer packaging. Suitable for air freight and sea freight without additional protective packaging.
• Shipping from Xiamen, China: DHL Express (2–4 business days to EU/US), FedEx International Priority, and sea freight consolidation for bulk orders. Export documentation (commercial invoice, packing list, certificate of origin) prepared to destination country customs requirements.
• Lead Time: In-stock units ship within 1–2 business days of payment confirmation. Contact us for real-time stock status before placing an order.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.