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R911298603 (DKR04.1-W300N-BT29-02-FW)

DKR Drive Controllers

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1 Year Warranty Included
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1 Year Warranty Included
Free Ground Shipping

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The R911298603 (DKR04.1-W300N-BT29-02-FW) is a Bosch Rexroth DKR series controller, featuring a SERCOS interface for communication with computers and additional control units via fiber optic cabling. Suitable for the digital control of Rexroth linear motors (LSF or LAF) and AC main spindle motors (2AD or ADF), it supports wide speed operation with constant power, typically used in printing machines and NC-controlled machine tools. The controller operates on a 3xAC 400 V to 480 V power supply, offers RS-232 and RS-485 interfaces, and is designed with a built-in air cooling blower. Meeting IP20 protection (EN 60 529), it functions in ambient temperatures from 0 to 40°C and installation heights up to 1000 meters. The unit accommodates digital servo and resolver feedback, nominal current is approximately 300A, and it does not include a bleeder or brake chopper, with a rigid DC bus configuration.

Technical Specifications

Interface
SERCOS

Communication Method
Fibre Optic Cables

Suitable Motors
LSF or LAF, 2AD or ADF

Rexroth Motors Speed Range
Broad

Application
Printing Machines or NC-controlled Machine Tools

Protection Category
IP20

Operating Temperatures
0°C to 40°C

Installation Height
0 to 1000 m above sea level

Alternative Operation
RS-232 Interface or RS-485

Maximum Transmission Rates
9600/19200 baud

Transmission Length
Up to 15 meters

Power Connections
3xAC 400 V to 480 V

Cooling Method
Air from Outside the Control Cabinet

How does the DKR04.1-W300N-BT29-02-FW handle thermal management in continuous operation?

It uses active air cooling via an integrated blower, which helps maintain stable operating temperatures. This reduces thermal stress on power components during extended duty cycles.

Does the lack of a bleeder unit affect system safety during rapid deceleration?

Without a brake chopper, excess regenerative energy must be managed externally. Integrators typically pair it with external resistors or energy recovery units for safe dissipation.

What motor feedback options are supported by the DKR04.1-W300N-BT29-02-FW?

It supports both digital servo and resolver feedback. This flexibility ensures compatibility with a wide variety of servo motor types.

How does the rigid DC bus design affect protection schemes?

A stiff DC bus helps maintain voltage stability during dynamic load changes. This reduces the complexity of protective circuits in the DC-link system.

How is downtime minimized during servicing of this drive controller?

Its modular access points allow technicians to replace or inspect sections without full disassembly. This design shortens maintenance intervals and reduces production stoppages.

DKR041W300NBT2902FW

DKR04 1 W300N BT29 02 FW

dkr04.1-w300n-bt29-02-fw

DKR4.1-W300N-BT29-02-FW

Internal Product Review

The DKR04.1-W300N-BT29-02-FW controller from Bosch Rexroth offers a nominal and rated current of 300 A and communicates via SERCOS with built-in blower cooling. It supports digital servo and resolver feedback and omits a bleeder. It is ideal for retrofit in CNC machines, packaging systems, and robotic assembly lines.

Warranty

1-year-warranty
Indramat USA 1 Year Warranty

Repair

product repair We offer a repair service for the DKR04.1-W300N-BT29-02-FW.
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