R911279178 (DKR04.1-W300N-BE79-01-FW)

Name: R911279178 (DKR04.1-W300N-BE79-01-FW)
Brand: Indramat Drives
SKU: DKR04.1-W300N-BE79-01-FW
Price: 902.00 USD
Availability: InStock

DKR Drive Controllers

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The R911279178 (DKR04.1-W300N-BE79-01-FW) is a Rexroth Indramat DKR04 digital drive controller comprising a basic unit, separate firmware, five card slots, and support for various plug-in modules such as encoder, digital I/O, analog I/O, and CLC interface options. It is equipped with a SERCOS command interface and accommodates both digital servo and resolver feedback. The unit utilizes air cooling with a built-in blower and operates over a temperature range of 5 to 45 degrees Celsius and elevations up to 1000 meters. It provides a current rating of 300A, accepts 400 to 480V AC input, and supports a peak power rating of 92kW. No integrated bleeder is present, though external bleeders can be connected if required. The unit features a rigid DC bus and is designed for applications within the DKR product series, numeric function version 01.

Technical Specifications

Product
Rexroth Indramat Drive Controller

Command Interface Card Support
analog, SERCOS, Profibus, Interbus

Function Numeric Code
79

Version Function Numeric Code
01

Feedback Support
Digital Servo and Resolver

Cooling Mechanism
Air Cooling through Integrated Blower

Storage Temp Range
-30 to 80 degrees Celsius

Operation Temp Range
5 to 45 degrees Celsius

Maximum Installation Elevation
1000 meters

Rated Current
300 Amps

Input Voltage Rating
400 to 480 Volts AC

Bleeder
Not Available

Peak Power Rating
92 Kilowatts

Frequently Asked Questions

What are the housing considerations for installing the DKR04.1-W300N-BE79-01-FW?

The IP20 housing protects against solid objects but not liquids. It must be mounted inside an enclosed cabinet in a controlled environment.

Can this drive be used in applications requiring frequent start-stop cycles?

Yes, but external energy handling devices must be included to avoid DC bus overvoltage. Careful thermal management is also necessary due to repeated load cycles.

What risks come with using a controller without a brake chopper?

Without a brake chopper, excess regenerative energy cannot be dissipated internally. This can cause DC bus overvoltage unless managed by external resistors or energy recovery units.

How does resolver feedback compare to digital servo feedback in practice?

Resolver feedback is more rugged and reliable in harsh environments. Digital servo feedback provides higher precision where fine motion control is needed.

Does the built-in blower cooling require additional ventilation?

Yes, the unit must be installed in a cabinet with sufficient airflow. External filters and fans may be needed to maintain safe operating temperatures.

Common Misspellings

DKR041W300NBE7901FW

DKR04 1 W300N BE79 01 FW

dkr04.1-w300n-be79-01-fw

DKR4.1-W300N-BE79-01-FW

Internal Product Review

The DKR04.1-W300N-BE79-01-FW is a drive controller from the Bosch Rexroth Indramat DKR series. It operates at a nominal current of 300 A using a rigid DC bus, without a bleeder or brake chopper, and cooled by a built-in blower. It uses an IP20 rated enclosure intended for cabinet installation.