Product Details

Baumuller BUS21-30/45-30-001 is a compact servo drive power unit and reliable motion control drive module belonging to Baumüller BUS21 legacy servo family. This baumuller power unit delivers adjustable three-phase power for matching Baumüller AC servo motors, supporting torque, speed and position closed-loop regulation for automated machinery. It integrates IGBT power stage, DC link circuit, current and voltage sensing, dynamic braking and onboard fault monitoring. The front panel is equipped with terminal blocks for mains input, motor output, brake resistor and control signal wiring, plus LED indicators to display power status, running activity and alarm codes. It accepts command signals and encoder feedback from the control motherboard to implement high-dynamic motion profiles. Built with conformal coated PCB and reinforced power layout, this bus21 servo drive can operate continuously under cyclic load inside electrical cabinets. As a discontinued scarce original spare, this servo motion drive module serves as a drop-in replacement to restore precise motion performance for ageing Baumüller production lines.

Basic Parameters

Brand: Baumuller (Baumüller Nürnberg GmbH)

Model: BUS21-30/45-30-001, short marked: 21-30/45-30-00 1

Product Type: BUS21 Series Servo Drive Power Unit

Input: Three-phase AC supply

Rated / Peak Current: 30 A continuous, 45 A peak

Control Mode: Torque, speed, position closed-loop

Power Device: IGBT converter

Built-in Function: Dynamic braking, overcurrent sensing, thermal monitoring

Indicator: LED for power, run, fault and overheat

Cooling: Forced air cooling

Mounting: Panel mount inside control cabinet

Product Status: Discontinued original industrial spare

Net Weight: Approximately 6.8 kg

Supported Functions

This bus21 servo drive converts mains power into variable output to drive servo motors. The baumuller power unit receives motion setpoints and feedback signals, dynamically adjusting output current to maintain stable speed and positioning accuracy. This servo motion drive module supports homing, jogging, electronic gearing and soft limit monitoring for mechanical protection. It continuously monitors bus voltage, output current and internal temperature; once exceeding safe thresholds, it triggers fault lockout and cuts power output to avoid component damage. It stores fault history for quick troubleshooting and sends alarm signals to the upper control system. It works perfectly with compatible Baumüller control boards, servo motors, encoder assemblies and feedback cables to build a complete closed-loop motion control system.

Core Functions

As an integrated servo power unit for the BUS21 platform, this bus21 servo drive provides the high dynamic power required for precision motion. Its built-in protection circuits reduce risks during overload and mains fluctuation, and the standardized BUS21 architecture simplifies field swap and maintenance. This baumuller power unit works as a direct spare to rebuild servo driving capability for legacy Baumüller automation equipment.

Hardware Specifications & Environmental Features

Operating Temperature: 0°C ~ +50°C

Storage Temperature: -20°C ~ +75°C

Relative Humidity: 5%–90%, non-condensing

Housing: Heavy metal enclosed power unit, IP20

Protection: Overcurrent, overvoltage, undervoltage, overtemperature, short-circuit and stall protection

Anti-interference: Internal EMI filter, isolated control signal interface, power shielding

Compatibility: Matching Baumüller BUS21 control board, AC servo motors, encoder feedback harness

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note: Confirm exact BUS21 variant, mains voltage rating, motor current and firmware compatibility before ordering.

This is from our current stock.

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