Rexroth Indramat 109-0943-3801-05 Product Description

Rexroth Indramat 109-0943-3801-05 is a spindle amplifier power board for Indramat legacy spindle servo drive systems. This power conversion PCB performs rectification, DC bus generation and power amplification to drive high-speed CNC spindle motors. It converts three-phase AC mains into controlled variable-frequency AC output, supporting high dynamic speed regulation for machine tool spindles. Built with heavy-duty power semiconductors and protective circuits, this board is widely stocked as fully tested spare hardware for CNC machining center drive cabinet overhaul and emergency replacement.

Product Features

• Dedicated power amplifier board for Indramat spindle servo drive units
• 3-phase 380–480VAC input, converts to variable frequency AC for spindle motor
• Supports 0–400Hz high-frequency output for high-speed spindle operation
• Integrated over-current, over-voltage, under-voltage and over-temperature protection
• Power semiconductor section with fast fault shutdown for motor and circuit protection
• Conformal coated PCB, anti-vibration and dust-resistant for machine tool cabinet
• Onboard test points and LED indicators for fault diagnosis and troubleshooting
• Modular plug-in design, direct replacement for matching Indramat spindle drive rack
• High continuous load capacity for 24/7 heavy cutting CNC machining applications

Application Scenarios

• CNC machining center high-speed spindle drive power unit replacement
• Vertical / horizontal milling machine and boring machine Indramat spindle systems
• Automated production line spindle motor speed control cabinets
• Precision grinding machine and mold processing equipment servo spindle drives
• Metal cutting machine tool retrofit and drive system maintenance
• Spare replacement for legacy Rexroth Indramat spindle amplifier racks

FAQ