R911280727 (DKR04.1-W300N-BE12-01-FW)

Name: R911280727 (DKR04.1-W300N-BE12-01-FW)
Brand: Indramat Drives
SKU: DKR04.1-W300N-BE12-01-FW
Price: 688.00 USD
Availability: InStock

DKR Drive Controllers

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The R911280727 (DKR04.1-W300N-BE12-01-FW) is a Bosch Indramat DKR04.1 series drive controller designed for use with power supply voltages up to 380 V. It features air cooling via a built-in blower, with a total heat dissipation capacity of 2500 W. The unit incorporates a brake resistor for braking energy management and has a rigid DC bus without a brake chopper. This controller has a rated current of approximately 300 A and a typical assembled weight of 150 kg. Its modular construction includes a basic unit, software module, SERCOS command interface card, digital I/Os, and analog signal interface. It supports digital servo and resolver feedback, requires Rexroth feedback cable assemblies up to 75 m, and provides terminal connectors for wiring. Firmware is supplied separately.

Technical Specifications

Power Voltage
0-380 Volts

Total Heat Dissipation
2500 Watts

Cooling Method
Built-in blower

Approximate Weight
150 kilograms

Brake Resistor
Present

Firmware
Order separately

Energy Dissipation
Load-dependent

Protection Category
Not affected by cooling method

Product Line
04

Rated Current
300 amps

Maximum Cable Length
75 meters

Spindle Motor Control Method
Digital

Terminal Connectors
Reliable, bottom of device

Command Communication Interface
Analog

Communication Interface Connection
Fiber optic cables.

Frequently Asked Questions

How does the absence of a bleeder in DKR04.1-W300N-BE12-01-FW affect system design?

Without a bleeder, excess energy from braking must be managed externally. This typically requires integration with external resistors or system-level energy handling.

What role does the SERCOS interface play in this drive controller?

SERCOS enables deterministic, high-speed communication between the drive and CNC or motion controllers. It ensures precise synchronization critical for multi-axis systems.

What installation precautions should be taken for a 300A rated drive?

Adequate cabling, grounding, and protection devices must handle the high current safely. Improper installation can cause voltage drops, heating, or premature component failure.

What are the benefits of combining digital servo feedback with resolver signals?

Digital encoders provide fine resolution, while resolvers add redundancy and reliability. Together, they enhance precision and fault tolerance in demanding processes.

How should air intake and exhaust be managed for the built-in blower?

Clear air paths must be maintained to prevent recirculation of hot air. Filters may be needed if the drive is installed in dusty environments.

Common Misspellings

DKR041W300NBE1201FW

DKR04 1 W300N BE12 01 FW

dkr04.1-w300n-be12-01-fw

DKR4.1-W300N-BE12-01-FW

Internal Product Review

The DKR04.1-W300N-BE12-01-FW is a drive controller from the Bosch Rexroth Indramat DKR series. It features a rigid DC bus with no bleeder, a built-in blower for air cooling, and a SERCOS command interface. It is often used in applications such as controlling main spindle motors, linear motors, and CNC machines.