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KDA 2.1-150-3-DYD-W1

KDA Spindle Drives

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The Bosch Rexroth Indramat KDA 2.1-150-3-DYD-W1 is a high-performance digital axis controller from the KDA Spindle Drives series by Bosch Rexroth Indramat. This robust unit delivers a rated output current of 150A and a rated power of 21 kVA, ensuring reliable performance under heavy spindle loads. It operates on a 3-phase, 380-480V AC input voltage and features advanced field oriented control for superior dynamic response in demanding motion profiles. Designed for industrial automation, it supports both induction and synchronous motors to accommodate a wide range of spindle drive requirements.



The controller’s technical capabilities include a speed command value implemented as digital 16-bit parallel, enabling high-resolution speed control down to 0.0005 rpm for ultra-precise spindle orientation. Communication is provided through CAN and RS232/RS485 interfaces to simplify integration into modern automation networks. Feedback options include dedicated resolver and encoder inputs for real-time shaft position monitoring and closed-loop accuracy. The internal DC bus voltage of 300 V stabilizes the power rail, ensuring consistent torque output even under transient loads. Advanced drive algorithms adapt to both induction and synchronous motor characteristics for optimized torque consistency across the full speed range.



Operational reliability is upheld by a forced air cooling method that maintains safe operating temperatures throughout continuous use, complemented by an IP20 protection class rating to guard sensitive electronics against dust ingress. The unit is engineered to operate in ambient conditions from 0°C to +45°C and installs via a panel mount system that secures the controller within compact control cabinets. Power and signal connections are secured by a screw-terminal cable connection that provides reliable clamp-down strength for long-term service. Weighing approximately 18 kg, the module is manageable during installation and maintenance while retaining a rugged form factor.



Integration into industrial systems is streamlined through its multi-interface design, supporting both CAN-based automation buses and legacy RS232/RS485 links alongside an auxiliary encoder input for synchronization tasks. The controller’s compatibility with standard 3-phase power networks and modular panel-mount architecture facilitate rapid retrofits in CNC machining centers, automated lathes, and high-speed milling machines. Its precise speed control and field oriented algorithms make it ideal for advanced manufacturing applications requiring tight spindle regulation and repeatable motion sequences. With its combination of technical flexibility and robust construction, the KDA 2.1-150-3-DYD-W1 enables system designers to achieve enhanced performance in complex automation environments.

Technical Specifications

Cable Connection
Screw Terminal

Communication Interface
CAN, RS232/RS485

Control Type
Field Oriented Control

Cooling Method
Forced Air Cooling

Feedback Supported
Resolver, Encoder

Input Voltage
3-phase, 380-480V AC

Mounting Method
Panel Mount

Operating Temperature Range
0°C to +45°C

Protection Class
IP20

Rated Output Current
150A

Rated Power
21 kVA

Supported Motors
Induction and Synchronous Motors

Type
Digital Axis Controller

Weight
Approx. 18 kg

Product
KDA

Series
2

Design
1

DC Bus Voltage
300 V

Speed Command Value
Digital 16-Bit Parallel

Aux. Encoder Input
With Auxiliary and Synchronous Inputs (Due to AS 35 and Speed Command Value = A)Aux. Interface1

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Warranty
1-year-warranty
Indramat USA 1 Year Warranty
Repair
product repair We offer a repair service for the KDA 2.1-150-3-DYD-W1.
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