R911282396 (DKR02.1-W300B-BE41-02-FW)

Name: R911282396 (DKR02.1-W300B-BE41-02-FW)
Brand: Indramat Drives
SKU: DKR02.1-W300B-BE41-02-FW
Price: 984.00 USD
Availability: InStock

DKR Drive Controllers

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The R911282396 (DKR02.1-W300B-BE41-02-FW) is a Bosch Rexroth industrial drive controller equipped with a built-in power supply unit. It operates on a 3 x AC 400–480V mains input at 50/60 Hz, supporting a rated current of approximately 300 A, and requires a control voltage of AC 230 V (±10%). The unit provides drive frequencies of 4 kHz (55 kW at 141 A continuous) and 8 kHz (43 kW at 110 A continuous). An integrated bleeder resistor dissipates 1.5 kW continuously with a peak capability of 90 kW during deceleration. The housing is rated to IP20 and is intended for mounting within an IP54 switch cabinet. Communication is facilitated by RS232/RS485 and SERCOS interfaces, and digital servo and resolver feedback mechanisms enable precise motor control. Air cooling is implemented via a built-in blower, and optimal performance is achieved at an ambient temperature of +45°C.

Technical Specifications

Product
Bosch Rexroth Drive Controller

Power Supply
3 x AC 400 – 480V

Voltage Frequency
50/60 Hz

Rated Current
300 A

Control Voltage
AC 230 V ±10%

Drive Options
4 kHz or 8 kHz

Continuous Current (4kHz)
141 A

Continuous Power (4kHz)
55 kW

Continuous Current (8kHz)
110 A

Continuous Power (8kHz)
43 kW

Resistor Continuous Power
1.5 kW

Resistor Peak Power
90 kW

Protection Standard
IP 20

Serial Interface
RS232/RS485

Clearance Requirement
160 mm

Cooling Mechanism
Ambient air with blower

Feedback
Digital Servo and Resolver Feedback

Communication
SERCOS Interface

Operating Temperature
+45 degrees Celsius.

Frequently Asked Questions

What does the built-in bleeder in the DKR02.1-W300B-BE41-02-FW do during operation?

It dissipates excess regenerative energy from the motor into heat, preventing overvoltage conditions. This ensures stable performance in applications with frequent braking cycles.

Why is air cooling with a blower chosen over liquid cooling in this controller?

Air cooling reduces complexity and installation cost compared to liquid-cooled systems. It is effective when mounted in properly ventilated control cabinets.

Can a 300 A current rating handle high-inertia load applications effectively?

Yes, the high current capacity enables strong torque output to accelerate and decelerate heavy loads. This is particularly useful in presses, extruders, or large conveyors.

What risks occur if the built-in blower is obstructed during operation?

Restricted airflow causes overheating, reducing efficiency and potentially triggering thermal shutdowns. Proper clearance and regular dust cleaning are required.

What is the practical effect of using this controller with digital servo feedback in CNC machinery?

It allows precise axis positioning with minimal lag, critical for milling and cutting tolerances. This improves surface finish and repeatability in production.

Common Misspellings

DKR021W300BBE4102FW

DKR02 1 W300B BE41 02 FW

dkr02.1-w300b-be41-02-fw

DKR2.1-W300B-BE41-02-FW

Internal Product Review

The DKR02.1-W300B-BE41-02-FW is a drive controller in the Bosch Rexroth Indramat DKR series. It offers air cooling via built-in blower and handles both digital servo and resolver feedback with a 300 A rating. Its housing is rated to IP 20 and intended for installation within a control cabinet.