R911285171 (DKR02.1-W300B-BE56-01-FW)

Name: R911285171 (DKR02.1-W300B-BE56-01-FW)
Brand: Indramat Drives
SKU: DKR02.1-W300B-BE56-01-FW
Price: 236.00 USD
Availability: InStock

DKR Drive Controllers

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The Bosch Rexroth drive controller MPN R911285171 (DKR02.1-W300B-BE56-01-FW) is a digital unit suitable for NC machine tools and various industrial automation applications. It features a built-in bleeder resistor for dissipating excess heat and offers overvoltage protection. The controller operates on a 0–380V power supply and supports continuous output currents of 141/110 A, generating a rated output power of 55/43 kW. The peak regenerated power is 93 kW for up to 10 seconds. For effective thermal management, a clearance of at least 160 mm is required above and below the controller. It supports direct connection to three-phase AC power, air cooling via a built-in blower, motor temperature and brake monitoring, and uses a SERCOS command interface with digital servo and resolver feedback. The unit operates within a temperature range of +5 °C to +45 °C.

Technical Specifications

Product
Bosch Rexroth Drive Controller

Bleeder Resistor
Built-in

Protection
Overvoltage supply

Continuous Current
141/110 A

Continuous Power
55/43 kW

Power Voltage
0 – 380V

Voltage Frequency
800/1600 Hz

Power Loss
1800 W

Heat Dissipation
1200 W

Minimum Distance for Airflow
160 mm (top and bottom)

Monitoring
Motor temperature and holding brake

Peak Regenerated Power
93 kW (for max 10 seconds)

Software Module Slot
ESM 02.3 (U5)

Communication Interface
SERCOS (U1)

Motor Feedback
Digital servo and resolver feedback

Operating Temperature Range
+5 to +45 degree Celsius

Power Input
AC 3-phase (X5 port)

Protection Rating
IP 20

Frequently Asked Questions

What practical impact does using resolver feedback have compared to digital servo feedback?

Resolvers are rugged and tolerate harsh environments, while digital servo feedback provides higher precision. The choice affects accuracy, maintenance, and long-term reliability.

How does the bleeder configuration affect energy management in the drive?

It dissipates regenerative energy from braking directly into resistors. This prevents overvoltage in the DC bus and allows stable operation during rapid deceleration.

Why does the design version number matter for compatibility?

It indicates mechanical and electronic revisions that align with certain firmware and motor generations. Using the wrong version may cause incompatibility with older systems.

How does the DKR02.1-W300B-BE56-01-FW handle feedback signal integrity in electrically noisy environments?

Its resolver input provides robustness against noise due to analog signal nature. For precision tasks, digital encoder feedback ensures reliable position tracking.

How does regenerative braking interact with the bleeder in fast cycle processes?

During quick reversals or stops, energy is fed back into the DC bus. The bleeder converts this to heat, preventing instability or drive faults.

Common Misspellings

DKR021W300BBE5601FW

DKR02 1 W300B BE56 01 FW

dkr02.1-w300b-be56-01-fw

DKR2.1-W300B-BE56-01-FW

Internal Product Review

The DKR02.1-W300B-BE56-01-FW is a drive controller in Bosch Rexroth Indramat DKR series designed for servo systems. It supports both digital servo and resolver feedback, includes a bleeder configuration, and handles around 300 A nominal current. It finds use in NC machine tools, printing machinery, and paper-processing equipment.