Description
1. Product Overview
Rexroth HCS04.2E‑W0350‑N‑04‑NNBN is a high-power high-precision servo drive controller under Bosch Rexroth IndraDrive HCS04 series. As an industrial high-end three-phase AC servo power drive unit, it is developed for high-power, high-dynamic and high-stability working conditions including heavy-duty automation equipment, precision machine tools, large production lines, metallurgical and rubber & plastic complete sets of equipment. Adopting an industrial high-power integrated drive architecture, the unit is equipped with high-performance vector control algorithm, full closed-loop dynamic regulation system, intelligent power management unit and full-range fault diagnosis & protection system. It delivers high power output, fast dynamic response and precise closed-loop control of torque/speed/position, serving as the core power drive hardware for servo power execution, high-precision motion control and stable-speed operation of heavy-duty equipment in large-scale industrial automation systems.
This model is a standard high-power unit of the HCS04.2E series, featuring internal air cooling structure, standard 380‑480V wide voltage power supply and integrated braking transistor configuration, suitable for continuous operation under industrial heavy-duty conditions. Leveraging original Rexroth high-precision servo control technology, dynamic load adaptive algorithm and EMC optimization design, it boasts abundant output power, rapid dynamic response, vibration-free operation, strong load adaptability and outstanding long-term operational stability. It can perfectly drive and perform closed-loop regulation for various high-power servo motors. Compliant with international industrial standards including IEC, UL and CSA, the unit has passed stringent power aging, vibration shock, temperature cycling and EMC electromagnetic compatibility tests. With high protection level, strong anti-interference capability and ultra-low failure rate, it is widely used in high-end intelligent manufacturing, precision machining, metallurgical processing, rubber & plastic extrusion and large pipeline industries. It acts as the standard original core drive unit for technical renovation & upgrade of high-power servo systems, equipment maintenance replacement and high-end production line matching.
2. Functional Characteristics
2.1 Stable High-power Output for Industrial Heavy-duty Conditions
As a high-power drive model of the HCS04 series, HCS04.2E‑W0350‑N‑04‑NNBN provides high rated output power and stable load capacity, deeply optimized for industrial heavy loads, impact loads and continuous full-load operation. It can precisely meet the torque output, speed regulation and position control requirements of high-power servo motors, and effectively solve problems such as start-stop stalling, speed drift, insufficient torque and load fluctuation of heavy-duty equipment. Supporting continuous full-load operation, frequent start-stop and dynamic load switching modes, it delivers smooth output power and sufficient power reserve to drive large mechanical actuators stably for a long time, perfectly fitting high-precision motion control scenarios for high-end industrial heavy-duty applications.
2.2 Multi-mode High-precision Closed-loop Control with Superior Motion Control Accuracy
Equipped with exclusive high-end servo control algorithm of Rexroth IndraDrive, it supports free switching among three core control modes: torque closed-loop, speed closed-loop and position closed-loop, which can flexibly adapt to different motion control logics according to process requirements of equipment. It features ultra-high dynamic response speed, ultra-low speed fluctuation and precise positioning calibration, capable of micron-level position control, stepless smooth speed regulation and constant-torque stable output. It effectively eliminates equipment operating vibration, overshoot, lag and positioning deviation. Deeply optimized for high-precision processes such as precision machining, high-speed reciprocating motion, synchronous linkage control and constant force extrusion, it fully satisfies stringent accuracy requirements of high-end intelligent manufacturing equipment for precise motion control, synchronous coordination and steady-state operation.
2.3 Built-in Braking Transistor for Frequent Start-stop Conditions
With standard NNBN hardware configuration, the unit comes with integrated original braking transistor. It can independently complete deceleration, braking and energy dissipation without an external braking unit. It efficiently absorbs regenerative electric energy generated under frequent start-stop, rapid deceleration and emergency stop conditions to prevent DC bus overvoltage, overvoltage alarms and overload damage of power devices, greatly improving operational stability and safety under frequent start-stop and reciprocating motion conditions. It meets process requirements such as high-speed start-stop, frequent commutation, short-time braking and precise shutdown of large equipment, simplifies on-site wiring and reduces supporting equipment cost and later maintenance difficulty.
2.4 Dynamic Load Adaptation with Strong Resistance to Load Fluctuation
Built-in intelligent load identification and dynamic adaptation system collects working condition data such as load impedance, operating torque and speed fluctuation in real time. It automatically adjusts output parameters dynamically and compensates load loss to adapt to working condition changes. Faced with complex on-site industrial conditions including sudden load change, mechanical friction fluctuation, slight grid voltage disturbance and long-time full-load operation, it performs automatic parameter adaptive adjustment to maintain precise and stable output speed, torque and position all the time. It thoroughly solves operational instability, process deviation and equipment vibration caused by load variation of heavy-duty equipment, showing excellent working condition adaptability and operational fault tolerance.
2.5 Full-range Intelligent Fault Diagnosis & Multiple Electrical Safety Protection
Featuring comprehensive intelligent fault diagnosis and protection system, it monitors potential hazards 24/7 including overvoltage, undervoltage, overcurrent, overload, short circuit, overheating, phase loss, communication abnormality, encoder fault, abnormal load and braking fault. The system can accurately identify fault types, locate fault points, store fault logs, upload data to upper system in real time and trigger audible & visual alarms with exclusive fault codes for quick troubleshooting. Meanwhile, multiple hardware protection mechanisms including overvoltage, overcurrent, overheating, short circuit, phase loss, electrostatic surge and overload shutdown are integrated. It can rapidly cut off power output upon abnormality to protect the drive, servo motor and the whole mechanical equipment, significantly improving operational safety and fault tolerance and lowering risks of equipment damage and process failure.
2.6 Industrial-grade Air Cooling for 7×24 Hours Continuous Operation
It adopts internal blower-forced air cooling architecture with dedicated air duct design, sufficient airflow and high heat dissipation efficiency, which quickly removes heat generated during high-power operation to control temperature rise of the whole unit and avoid derating, high-temperature alarms and overheating shutdown. The blower has an extra-long service life, and the three-phase blower can run up to 48,000 hours, suitable for year-round non-stop continuous industrial production. Having passed strict high-temperature aging, temperature shock, dust-proof and moisture-proof tests, the unit can operate stably for a long time under harsh industrial conditions of high temperature and heavy load, ensuring stable operation of high-power servo systems all year round.
2.7 High-grade EMC for Complex Industrial Sites with Strong Anti-interference Performance
Complying with IEC 61800‑3 Class C3 industrial electromagnetic compatibility standard, it adopts dedicated electromagnetic shielding, power filtering, signal isolation and harmonic suppression design. It effectively isolates electromagnetic interference, radio clutter, grid harmonics and voltage surges generated by inverters, high-voltage equipment, high-power units and transmission lines on industrial sites. It greatly reduces external radiation interference during operation and resists the impact of external disturbances on control accuracy, completely eliminating interference-related faults such as servo vibration, speed drift, communication interruption and abnormal control, enabling stable operation of high-end precision equipment in complex electromagnetic environments.
3. Technical Parameters
3.1 Core Adaptation Parameters
Product Model: HCS04.2E‑W0350‑N‑04‑NNBN Brand: Bosch Rexroth Series: IndraDrive HCS04 High-power Servo Drive Series Product Type: Industrial High-power Servo Drive Controller (Power Unit) Hardware Configuration: Built-in braking transistor, internal air cooling, standard power version Input Voltage: 3×AC 380V‑15%～480V+10%, industrial three-phase AC Core Functions: High-power output, torque/speed/position three closed-loop control, intelligent load adaptation, full-range fault protection, built-in braking, high-speed dynamic response Matched Equipment: High-power industrial servo motors, heavy-duty precision motion mechanisms, large automated production lines, machine tool spindles, metallurgical & rubber-plastic complete equipment Application Scenarios: High-end precision machining, heavy-duty automation equipment, frequent start-stop production lines, high-power servo synchronous control, continuous industrial production conditions
3.2 Power and Operating Parameters
Rated Input Current: 226A (Standard Working Condition) Rated Short-circuit Current: 42000A rms Matching Fuse Specification: 350A Control Power Supply: 24V DC ±20% industrial control power supply Fan Power Supply: 3AC 380‑480V, 50/60Hz Fan Power Consumption: 550VA Control Modes: Switchable torque closed-loop, speed closed-loop and position closed-loop Dynamic Response: Ultra-high dynamic response, applicable for high-speed precision motion control Operating Characteristics: Continuous full-load operation, no attenuation under frequent start-stop, load adaptive without drift
3.3 Electrical Protection & Performance Parameters
Electrical Standards: Compliant with IEC 61800‑3, UL, CSA standards for industrial drive equipment EMC Class: IEC 61800‑3 Class C3 high anti-interference industrial grade Protection Functions: Comprehensive protection against overvoltage, undervoltage, overcurrent, overload, short circuit, phase loss, overheating, encoder fault and communication abnormality Braking Configuration: Integrated braking transistor, no external braking unit required, autonomous energy dissipation Signal Characteristics: Isolated transmission of control signals, no interference drift, high closed-loop regulation accuracy Harmonic Suppression: Built-in power filter unit to effectively suppress grid harmonic interference
3.4 Mechanical Installation Parameters
Installation Method: Vertical mounting inside standard industrial control cabinet, fastened by fixing bolts Total Weight: 74.00kg Height: 782mm Width: 350mm Minimum Bottom Installation Clearance: 200mm Terminal Specification: M12 high-power terminal, tightening torque 41Nm Heat Dissipation Mode: Built-in three-phase blower forced air cooling with optimized air duct structure Structural Features: Reinforced industrial housing, vibration resistance, shock resistance, compact high-power integrated design
3.5 Environmental Working Condition Parameters
Rated Operating Temperature: 0℃～+40℃ (stable full-power operation) Allowable Operating Temperature: ‑10℃～+55℃ (derated operation) Storage Temperature: ‑25℃～+70℃ Operating Humidity: 5%～95%RH (non-condensing) Environmental Resistance: Dust-proof, moisture-proof, vibration resistant, anti-electromagnetic interference, resistant to oil and dust in industrial environments Operation Mode: Support 7×24 hours non-stop continuous full-load operation all year round
4. Hardware Configuration & Structural Advantages
4.1 Core Hardware Configuration
Rexroth HCS04.2E‑W0350‑N‑04‑NNBN adopts high-power high-end drive hardware architecture for industrial use, equipped with original imported high-power IGBT power module, high-speed vector control main chip, independent signal sampling unit, intelligent braking control unit, full-range fault monitoring chip and dedicated air cooling system. After strict factory power aging and shock tests, the power module features high current carrying capacity, uniform heat generation, resistance to impact load and long service life. The unit integrates independent acquisition circuits for voltage, current, temperature and encoder signals, which collect operating condition data with high precision in real time to provide data support for closed-loop precise regulation, fault diagnosis and load adaptation. The built-in original braking transistor efficiently dissipates regenerative energy without additional braking units, simplifying system hardware configuration. The control circuit and power circuit are fully electrically isolated to avoid interference between strong and weak currents and guarantee precise and stable control signals. All core components have passed high-standard reliability tests by Rexroth original factory to adapt to long-term continuous high-power industrial operation.
4.2 Structural Design Advantages
The unit adopts compact integrated industrial structure for high-power applications with neat layout and high power integration, effectively saving cabinet installation space while delivering high power output. The reinforced metal housing is vibration-resistant and shock-resistant with sound mechanical stability, capable of withstanding long-term vibration and start-stop impact on production lines without structural deformation or poor contact. The dedicated air duct air cooling structure with long-life built-in three-phase blower ensures smooth airflow and uniform heat dissipation to rapidly remove heat generated in high-power operation and prevent local heat accumulation. Standard M12 high-power terminals provide reliable wiring, stable current carrying and convenient maintenance, suitable for long-term operation under high-current conditions. Onboard visual operation indicator lights and fault code display interface directly reflect equipment running status, fault types and abnormal working conditions for daily inspection and rapid troubleshooting. The overall structure balances stability of high-power output, heat dissipation efficiency, maintenance convenience and working condition adaptability, perfectly meeting stringent requirements of heavy-duty continuous industrial production.
5. Working Principle
The Rexroth HCS04.2E‑W0350‑N‑04‑NNBN servo drive adopts a full closed-loop high-power servo drive mechanism: three-phase AC input → rectification & filtering → DC bus voltage stabilization → IGBT inverter output → multi-mode closed-loop precise regulation → dynamic load adaptation → braking energy recovery & dissipation → full-range fault protection, to realize power driving and precision motion control of high-power servo motors.
When connected to industrial 380‑480V three-phase AC power supply, the internal rectifier module converts AC power into stable DC voltage, which is filtered and stabilized by the bus to provide steady DC power for the inverter unit. The main control system receives speed, torque and position commands issued by the upper control system. Combined with motor operation feedback data collected in real time by the built-in high-precision sampling unit, Rexroth exclusive vector control algorithm performs dynamic calculation, error correction and load adaptation, accurately driving the IGBT power module for inverter output. DC power is converted into three-phase AC power with precisely adjustable frequency, voltage and phase to drive high-power servo motors.
During operation, the system continuously collects real-time working parameters of the motor including speed, torque, position, current and temperature, dynamically modifying output parameters to realize full closed-loop precise regulation of torque, speed and position and adapt to load fluctuation and working condition variation. When the equipment decelerates, shuts down or triggers emergency stop, the built-in braking transistor activates rapidly to absorb regenerative braking energy from the motor and stabilize DC bus voltage to avoid overvoltage faults, enabling smooth braking and precise shutdown. The full-time intelligent diagnosis system monitors electrical parameters and operating status of the whole unit. Once abnormality is detected, protection will be triggered instantly, power output cut off and fault information uploaded, comprehensively guaranteeing accurate, stable and safe operation of the high-power servo drive system.
6. Application Scenarios
6.1 Spindle Drive for High-end Precision CNC Machine Tools
It is widely applied to spindle servo drive systems of large machining centers, CNC milling machines, CNC lathes, grinders and other high-end precision machine tools, providing stable power output and precise speed closed-loop control for high-power machine tool spindles. With advantages of high-precision speed regulation, vibration-free operation, fast dynamic response and strong load adaptability, it perfectly fits high-speed cutting, heavy-duty machining, precision grinding and constant-speed feed processes of machine tools. It effectively improves machining accuracy, surface finish and production stability, eliminates spindle speed drift, uneven machining texture and equipment vibration to guarantee high-quality output of precision mechanical processing.
6.2 Heavy-duty Extrusion Equipment Control in Rubber & Plastic Industry
Suitable for main drive systems of heavy-duty rubber & plastic complete equipment such as injection molding machines, extruders, blow molding machines and rubber molding machines. It undertakes precise drive and stable speed control tasks for high-power screws, rollers and traction mechanisms. Aimed at harsh working conditions of rubber & plastic equipment including heavy-load startup, continuous full-load operation, large load fluctuation and frequent start-stop, it delivers uniform extrusion speed, stable pressure and consistent molding precision with high power output, strong load adaptability, long stable operation and good anti-interference performance, effectively reducing product reject rate and meeting continuous, large-scale and high-precision production requirements of rubber & plastic industry.
6.3 Large Automation Equipment for Metallurgy & Heavy Industry
Applied to large automated production lines in metallurgical rolling, plate conveying, heavy forging and metal forming industries, it provides high-power precise servo drive for heavy conveying mechanisms, rolling equipment and precision positioning mechanisms. It withstands harsh environments of heavy load impact, continuous high-load operation and complex electromagnetic interference in heavy industry. With stable power output and precise closed-loop control capability, it ensures smooth operation, accurate positioning and controllable start-stop of heavy equipment, improves automation level and operational stability of heavy industrial production lines and reduces risk of equipment downtime caused by faults.
6.4 Multi-axis Synchronous Servo Control System for Large Production Lines
Applicable for multi-axis synchronous servo drive scenarios of large packaging lines, logistics sorting lines, automated assembly lines and printing & textile production lines. It realizes precise synchronous operation, speed coordination and position following of multiple high-power servo motors. Featuring ultra-high dynamic response, high-precision closed-loop regulation and dynamic load adaptation, it guarantees unified operation rhythm of each station along the whole production line, minimal synchronization error and smooth operation without jitter, greatly improving operational efficiency and production consistency of automated production lines for mass continuous automated production.
