Bosch Rexroth R911280542 HVE03.2‑W030N DIAX04 Power Supply Unit

Product Description

The R911280542 (HVE03.2‑W030N) is a 30 kW power supply unit of Bosch Rexroth DIAX04 servo drive system. It accepts three‑phase 380‑480 VAC input and converts AC power into stable 531‑670 VDC bus voltage for HDD / HDS servo drive controllers. It adopts built‑in blower air cooling, integrated power contactor and bleeder resistance for regenerative energy dissipation. The rugged metal cabinet is designed for cabinet‑mount installation and continuous operation under vibration, dust and temperature fluctuation in industrial workshops. It is widely used as spare replacement power module for Rexroth DIAX04 multi‑axis motion control racks.

Product Functions

• Three‑phase AC‑DC rectification to generate shared DC bus power for multiple servo axes
• Built‑in brake bleeder to consume regenerative energy and prevent DC bus overvoltage during motor deceleration
• Internal mains contactor realizes safe power isolation between the grid and DC bus
• Control bus communication with matched drive controllers for status exchange and fault signaling
• Complete hardware monitoring for overvoltage, undervoltage, overcurrent, overheating and fan failure
• Front‑panel status indicators display power‑on, running and fault alarms for quick maintenance diagnosis
• Supports external DC bus choke expansion to improve power quality and reduce grid harmonic interference

Application Scenarios

• Multi‑axis CNC machine tools, machining centers and gantry milling equipment
• Metal forming machinery, hydraulic press and stamping line servo control systems
• Packaging, textile and printing automated production line motion control racks
• Automated handling robots, transfer machines and assembly stations
• Woodworking, plastics and rubber processing high‑dynamic servo drive equipment
• Spare replacement and retrofit of aging DIAX04 power supply units on existing production machines

Common Problems

• DC bus overvoltage alarm：excessive regenerative energy, bleeder circuit damage or bus capacitance aging
• Power unit no output after mains switch‑on：defective internal contactor, three‑phase input phase loss or loose power terminal wiring
• Over‑temperature fault：fan blockage, dust accumulation on cooling channel, poor cabinet ventilation or long‑time heavy‑load operation
• Communication failure with servo drives：control bus wiring disconnection, terminal oxidation or incompatible drive firmware version
• Intermittent shutdown under dynamic load：input voltage fluctuation, loose DC bus connector or rectifier component degradation
• Bleeder cannot work normally：broken bleeder resistor, bleeder drive circuit fault or wrong parameter configuration
• Random fault alarm without obvious trigger：PCB dust pollution, component thermal aging and ground loop interference