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Rexroth DKC02.3-040-7-FW Servo Drive
Overview
The Rexroth DKC02.3-040-7-FW is a high-performance digital servo drive from Bosch Rexroth's IndraDrive Cs series (also known as the EcoDrive family). Designed as a compact "power regulator" for precision motion control systems, this drive converts electrical energy into smooth, accurate motor movement to achieve micron-level positioning. It is a critical component in industrial automation, bridging the gap between control signals and mechanical motion in complex machinery.
Technical Features
High Current Output – The drive delivers a rated output current of 40 A, with peak current capability up to 40 A, making it suitable for medium-power servo applications. Continuous output current ranges from 24–28 A depending on cooling conditions.
Wide Voltage Compatibility – It operates on a 3-phase 200–230 V AC input at 50/60 Hz with a 24 V AC control voltage. The DC-bus nominal voltage is 700 V, enabling rapid energy transfer for fast torque response. Some configurations support a wider 380–480 V AC input range.
Power Rating – The drive has an output power rating of 4.0–5.0 kW, with maximum energy dissipation of 5.0 kWs and a peak bleeder power of 10 kW.
Digital Closed-Loop Control – Featuring a 32-bit DSP processor that adjusts motor output 10,000 times per second, the drive ensures high dynamic response, smooth acceleration/deceleration, and micron-level positioning accuracy. It supports position, velocity, and torque control modes.
Advanced Communication Interfaces – The drive supports multiple communication protocols including SERCOS, PROFIBUS, PROFINET, CANopen, and Ethernet/IP, as well as analog ±10 V and digital I/O for flexible integration with various control systems.
Motor Compatibility – It is compatible with Rexroth IndraDyn, MDD, MKD, and other Indramat servo motors, supporting incremental encoders, resolvers, and SERCOS encoder feedback.
Robust Protection Features – Built-in overload protection, overvoltage protection, overcurrent protection, and thermal protection safeguard the drive and surrounding components during fault conditions. The IP20-rated housing provides protection against solid objects.
Compact and Modular Design – The drive features a booksize compact structure for cabinet or DIN rail installation, weighing approximately 5–7.5 kg. It uses forced air cooling with an internal fan and operates within 0–45°C ambient temperature.
Industrial-Grade Reliability – CE, UL, and CSA certified, the drive complies with international safety and quality standards. It delivers >95% efficiency with low noise operation (
Core Functionalities
Precision Motion Control – The drive provides accurate speed, position, and torque control for a wide range of machinery, ensuring smooth operation even under demanding conditions. Its advanced closed-loop architecture continuously monitors motor parameters to prevent errors, reduce wear, and improve energy efficiency.
High Dynamic Response – With its 32-bit DSP processor and advanced control algorithms, the drive handles dynamic loads while maintaining stability, making it essential for high-speed manufacturing lines and applications requiring rapid start-stop and high-speed movement.
Flexible Firmware Architecture – The FW7 firmware supports, optimized multi-segment S-curve acceleration/deceleration strategies, and improved dynamic response for light-load and high-inertia ratio servo scenarios. Users can configure parameters via IndraWorks or DriveTop software.
Seamless System Integration – The drive communicates natively with various automation platforms via PROFINET, CANopen, and other fieldbus systems, enabling real-time speed adjustments without custom programming. It pairs with I/O modules for expanded control capabilities.
Diagnostic and Monitoring – Integrated diagnostic functions and LED status indicators allow for quick identification and resolution of operational errors, minimizing downtime.
Energy Efficiency – High efficiency (>95%) and optimized power factor reduce energy consumption and operating costs while minimizing heat generation.
Application Sectors
The Rexroth DKC02.3-040-7-FW servo drive is widely used across industries requiring precise motion control, high dynamic response, and reliable performance.
| Industry Sector | Typical Applications |
|---|---|
| Machine Tools | CNC machines, milling centers, lathes, grinding machines – controlling spindle and feed speeds with 0.001 mm positioning accuracy for metal cutting. |
| Robotics | Industrial robots, pick-and-place robots, welding robots – providing power support for movement, manipulation, and high-speed positioning. |
| Packaging Machinery | High-speed packaging lines, filling, sealing, labeling, palletizing systems – controlling motion for automated packaging processes. |
| Printing and Converting | Web tension control, registration, cutting – ensuring precise synchronization in printing presses and paper converting equipment. |
| Material Handling | Conveyor systems, automated guided vehicles (AGVs), logistics and systems – powering material transport and positioning. |
| Factory Automation | Assembly lines, automated production systems, general industrial automation – serving as the core drive module for various automated processes. |
| Textile Machinery | High-speed weaving, spinning, and finishing equipment requiring precise speed and tension control. |
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | Bosch Rexroth |
| Series | IndraDrive Cs / EcoDrive |
| Model Code | DKC02.3-040-7-FW |
| Product Type | Digital Servo Drive / Motion Controller |
| Rated Output Current | 40 A |
| Continuous Output Current | 24–28 A (cooling dependent) |
| Output Power | 4.0–5.0 kW |
| Input Voltage | 3-phase 200–230 V AC (50/60 Hz) |
| Control Voltage | 24 V AC |
| DC-bus Nominal Voltage | 700 V |
| Control Modes | Position, velocity, torque control |
| Communication Interfaces | SERCOS, PROFIBUS, PROFINET, CANopen, Ethernet/IP, analog ±10 V, digital I/O |
| Motor Compatibility | IndraDyn, MDD, MKD, Indramat motors |
| Feedback Interfaces | Incremental encoder, resolver, SERCOS encoder |
| Protection Class | IP20 |
| Cooling Method | Forced air cooling (internal fan) |
| Operating Temperature | 0–45°C |
| Efficiency | >95% |
| Weight | Approx. 5–7.5 kg |
| Certifications | CE, UL, CSA |
Conclusion
The Rexroth DKC02.3-040-7-FW is a powerful, reliable, and versatile servo drive that exemplifies Bosch Rexroth's expertise in motion control technology. With its 40 A output current, 4.0–5.0 kW power rating, advanced digital closed-loop control, and support for multiple communication protocols, it delivers precise, energy-efficient motion control for demanding industrial applications.
Its defining features include high dynamic response with a 32-bit DSP processor, robust protection mechanisms, flexible firmware architecture, and seamless integration with various automation platforms. These attributes make it an ideal solution for a wide range of applications — from CNC machine tools and robotics to packaging machinery, material handling systems, printing equipment, and factory automation.
As a proven and trusted component in industrial automation worldwide, the Rexroth DKC02.3-040-7-FW delivers consistent performance, precise control, and long-term reliability for equipment across numerous industries.
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