DKR04.1-W300N-BT71-02-FW
DKR Drive Controllers
The Bosch Rexroth Indramat DKR04.1-W300N-BT71-02-FW from the DKR Drive Controllers series is engineered for high-demand servo applications with a Product Series: DKR architecture. It delivers a robust Current Rating: 300 A and a Nominal Current: Approx 300A capability, ensuring consistent power delivery to industrial motors. Integration is simplified through the native Command Interface: SERCOS interface, which provides deterministic real-time communication and synchronization. This controller is designed to interface seamlessly with modern automation systems.
Featuring a Bleeder Configuration: No bleeder/Without brake chopper, rigid DC bus, the unit minimizes component count while maintaining stable DC-link voltage. Thermal management relies on an efficient Cooling Method: Air (built-in blower) that sustains optimal operating temperatures under continuous load. The module adheres to Design Version: 1 standards and fits within the Line Series: 04 form factor, offering straightforward mechanical compatibility. Advanced position and velocity loops are supported via Motor Feedback: Digital servo and resolver feedback, delivering precise control across dynamic speed profiles.
This drive controller’s compact footprint and standardized interface accelerate system integration and reduce commissioning time. Its rugged construction and proven Bosch Rexroth Indramat quality provide dependable performance in demanding industrial environments. The DKR04.1-W300N-BT71-02-FW is an ideal choice for high-precision motion control in packaging, robotics, and assembly-line automation.
Technical Specifications
Bleeder Configuration
No bleeder/ Without brake chopper, rigid DC bus
Command Interface
SERCOS interface
Cooling Method
Air (built-in blower)
Design Version
1
Line Series
04
Motor Feedback
Digital servo and resolver feedback
Product Series
DKR
Current Rating
300
Nominal Current
Approx 300A
Frequently Asked Questions
What is the significance of the rigid DC bus in the DKR04.1-W300N-BT71-02-FW?
The rigid DC bus means energy sharing between axes is possible, improving efficiency in regenerative braking. However, the system must carefully limit voltage peaks since there is no internal bleeder to absorb excess energy.
How is regen energy handled without a bleeder/brake chopper?
In this design the drive expects external means (e.g. braking resistors or energy recovery modules) to absorb excess energy. Otherwise, DC-link voltage may rise dangerously during deceleration.
Why is the choice of blower cooling important in installation?
A built-in blower requires clear airflow paths and sufficient clearance in the cabinet for heat dissipation. Poor ventilation or obstructed ducts can lead to overheating and drive derating.
In what environment should the DKR04.1-W300N-BT71-02-FW be installed?
It must operate within prescribed ambient temperature, humidity, EMC and altitude limits as defined by the DKR planning manual.
How does motor feedback type (digital servo vs. resolver) affect control in this drive?
Digital servo feedback offers higher resolution and faster loop response, improving precision. Resolver feedback is more robust under electrical noise or harsh conditions but with lower resolution.
Common Misspellings
DKR041W300NBT7102FW
DKR04 1 W300N BT71 02 FW
dkr04.1-w300n-bt71-02-fw
DKR4.1-W300N-BT71-02-FW
Internal Product Review
The DKR04.1-W300N-BT71-02-FW is a drive controller from Bosch Rexroth’s DKR series. It provides approx. 300 A current rating, uses a rigid DC bus without bleeder or brake chopper and relies on internal blower cooling. It’s commonly applied in CNC machining centers, packaging machines, and spindle/linear motor control in industrial automation.
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