CR10251 Kollmorgen ServoStar CD Series 2 Digital Servo Drive
The CR10251 is a compact, high-performance digital servo drive from Kollmorgen’s ServoStar CD Series 2, designed for medium-power multi-axis motion control in industrial automation. It combines robust power density, precise digital control, and dedicated SERCOS communication with resolver feedback, making it ideal for demanding applications requiring reliable, high-dynamic operation.
Overview
As a core member of the ServoStar CD Series 2 platform, the CR10251 is a digital servo amplifier engineered to drive AC synchronous and asynchronous servo motors. It is optimized for resolver feedback and features a native SERCOS interface for high-speed, real-time multi-axis synchronization. The drive integrates advanced DSP-based control, built-in regenerative braking, and Safe Torque Off (STO) functionality, ensuring stable, efficient, and safe operation in harsh industrial environments. Its book-style compact housing minimizes cabinet space, supporting streamlined multi-axis machine designs.
Key Specifications
Electrical Ratings
Manufacturer: Kollmorgen (Danaher Motion)
Model: CR10251 (ServoStar CD Series 2)
Continuous Output Current: 10 A (RMS)
Peak Output Current: 20 A for 500 ms
Continuous Input Current: 13 A (230 VAC, three-phase)
Peak Input Current: 26 A (500 ms)
Input Voltage: 115/230 VAC ±10%, three-phase, 47–63 Hz
Input Power: 4.6 kVA (230 VAC, three-phase)
DC Bus Protection: 90 VDC undervoltage, 430 VDC overvoltage
Modulation Frequency: 7–8 kHz
Feedback System
Primary Feedback: Resolver (single/multi-speed)
Resolver Specifications: Transformation ratio 0.47, input 4.24 VAC, output 2 VAC, max resistance 120 Ω
Recommended Cable: Twisted-shielded pair, maximum length 75 feet
Optional Feedback: Incremental encoder, sine encoder (order-specific configurations)
Communication & Control
Communication Interface: SERCOS (native, Series 2 standard)
Control Modes: Position, speed, torque control
Torque Update Rate: 16 kHz
Velocity Loop Update Rate: 4 kHz
Safety Feature: Safe Torque Off (STO) compliant with ISO 13849-1
Serial Communication: RS-232/485 for configuration and monitoring
Physical & Environmental
Enclosure: Compact industrial casing, IP20 protection
Dimensions: 10-3/8” × 6-1/2” × 4” (263 mm × 165 mm × 102 mm)
Weight: Approximately 3.0–3.4 kg (6.6–7.5 lbs)
Operating Temperature: +5°C to +45°C (ambient, full rating)
Storage Temperature: -25°C to +70°C
Humidity: 10–90% non-condensing
Vibration Resistance: 0.5 g
Maximum Altitude: 1000 m (5% derating above 1000 m)
Cooling: Conduction cooling with integrated heat sink
Core Features
High-Power Compact Design
The CR10251 delivers 10 A continuous output current in a small footprint, providing robust medium-power performance for space-constrained control cabinets. Its high power density supports efficient multi-axis machine setups without compromising performance.
Precision Digital Control
Powered by advanced DSP technology, the drive ensures smooth, low-ripple torque output, precise speed regulation, and accurate positioning. With a 16 kHz torque update rate and 4 kHz velocity loop update rate, it delivers fast dynamic response for high-accuracy motion tasks.
Dedicated Resolver Feedback
Native resolver support offers reliable, noise-immune position sensing for harsh industrial environments. Resolver technology provides durable, maintenance-free operation compared to optical encoders, with consistent performance over extended periods.
SERCOS Communication
The integrated SERCOS interface enables high-speed, real-time communication between the drive and motion controllers, supporting tight synchronization in multi-axis systems. This ensures coordinated motion for complex machinery with minimal latency.
Integrated Safety & Protection
Safe Torque Off (STO) provides reliable motor torque removal, enhancing machine safety and compliance with global industrial safety standards. The drive also includes multi-layer protection against overvoltage, undervoltage, overcurrent, overtemperature, short circuits, and encoder faults, safeguarding the drive, motor, and entire system.
Regenerative Braking
Built-in regenerative braking efficiently recaptures energy during deceleration, reducing energy consumption and heat generation while improving cycle efficiency. This feature lowers operational costs and extends system lifespan.
Industrial Reliability
Designed for continuous operation in harsh environments, the CR10251 tolerates vibration, dust, and temperature fluctuations. Its rugged construction and high-quality components ensure long-term reliability in demanding applications.
Applications
The CR10251 is optimized for precise, medium-power multi-axis motion control across industries, including high-speed packaging and labeling machinery, heavy-duty automated assembly lines, printing and converting equipment, textile machinery, robotics and material handling systems, and general industrial automation requiring compact, high-accuracy servo control. It is particularly suited for systems using SERCOS communication and resolver feedback, such as machine tools and heavy-duty processing equipment.
Compatibility
The CR10251 is compatible with Kollmorgen Goldline XT series motors, including XT 30, XT 50, and XT 70 models, ensuring seamless integration with Kollmorgen’s motion control ecosystem. It supports both new installations and retrofit projects for existing Series 2 systems.
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