Introduction to DANAHER S20660-SRS
Product Description
The DANAHER S20660-SRS is a precision servo drive designed for high-performance motion control applications in industrial automation. Manufactured by Danaher Motion (now part of Fortive Corporation), a leading provider of motion control solutions, this drive is engineered to deliver accurate speed and position control for servo motors in sectors such as robotics, semiconductor manufacturing, packaging machinery, and precision assembly lines.
Featuring advanced vector control algorithms and digital signal processing, the S20660-SRS ensures smooth, responsive motor operation with minimal torque ripple, even at low speeds. Its compact, modular design allows for easy integration into multi-axis systems, while robust protection features safeguard both the drive and connected motor from electrical faults and overloads. The drive supports multiple feedback devices and communication protocols, enabling seamless integration with PLCs, motion controllers, and HMI systems for centralized automation control.
Technical Parameters
- Motor Compatibility: Brushless AC servo motors (up to 600W continuous power)
- Input Voltage: 100-240V AC (single-phase), 50/60Hz
- Output Current:
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- Continuous: 3.5A RMS
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- Peak (3 seconds): 10.5A RMS
- Control Modes: Position, velocity, torque, and homing modes (configurable via software)
- Feedback Support: Encoders (incremental, absolute), resolvers, and Hall sensors
- Communication Interfaces: RS485 (Modbus RTU), Ethernet/IP, and CANopen (optional)
- Positioning Accuracy: ±0.01° (with 17-bit absolute encoder)
- Speed Range: 0.1 to 5000 RPM
- Torque Ripple: <1% at rated speed
- Protection Features: Overcurrent, overvoltage, undervoltage, overtemperature, short circuit, and motor overload protection
- Digital I/O: 8 configurable inputs, 4 configurable outputs (TTL level)
- Analog I/O: 2 analog inputs (0-10V or 4-20mA), 1 analog output (0-10V)
- Power Consumption: <100W (no load); <600W (full load)
- Operating Temperature: 0°C to +55°C (32°F to +131°F)
- Storage Temperature: -20°C to +70°C (-4°F to +158°F)
- Relative Humidity: 5-95% RH (non-condensing)
- Protection Rating: IP20 (enclosure)
- Dimensions: 120mm × 80mm × 150mm (L × W × H)
- Weight: Approximately 1.2kg
Usage Methods
- Installation:
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- Mount the drive on a DIN rail or flat surface using the provided brackets, ensuring a minimum clearance of 50mm from adjacent components for heat dissipation.
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- Install in a clean, dry environment away from direct sunlight, corrosive gases, and strong electromagnetic fields (e.g., transformers, welders).
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- Secure the motor cables and control wiring to prevent strain on connectors, especially in high-vibration applications.
- Wiring and Connection:
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- Connect the AC power supply (100-240V) to the L1, L2, and PE (ground) terminals, using a dedicated circuit breaker rated for 10A.
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- Wire the servo motor to the U, V, W, and PE terminals, ensuring correct phase alignment to avoid motor rotation errors.
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- Connect feedback devices (encoder/resolver) to the dedicated signal terminals, using shielded twisted-pair cables with the shield grounded at both ends.
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- Connect control signals (digital I/O, analog inputs, and communication lines) to the terminal block, following the wiring diagram in the user manual.
- Configuration and Setup:
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- Power on the drive and use Danaher’s MotionWorks SP software to perform motor auto-tuning, which optimizes control parameters (gain, damping) for the connected motor.
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- Configure control mode (position/velocity/torque) and feedback type via the software interface, setting parameters such as maximum speed, acceleration, and jerk limits.
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- Program homing sequences (e.g., limit switch-based, encoder index-based) to establish a reference position for the motor axis.
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- Set up communication protocols (e.g., Modbus RTU) to enable data exchange with the master controller (PLC or HMI).
- Operation and Maintenance:
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- Monitor drive status via the front-panel LED indicators (power, ready, fault) and software diagnostics to check for errors (e.g., overcurrent, overheating).
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- Perform a test run at low speed to verify motor rotation direction and feedback synchronization; adjust phase wiring if rotation is reversed.
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- Inspect connections quarterly for tightness and signs of corrosion, especially in humid environments.
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- Clean the drive’s heatsink annually using compressed air to remove dust buildup, which can reduce cooling efficiency.
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- Replace worn cables or connectors immediately if damage (e.g., fraying, pin corrosion) is detected.
System Introduction
The DANAHER S20660-SRS functions as a critical motion control component in automated systems, integrating with three key layers:
- Control Layer: Receives position, velocity, or torque commands from a master controller (PLC or motion controller) via digital or analog signals.
- Power Conversion Layer: Converts AC input power to controlled DC, then to three-phase AC for the servo motor, adjusting voltage and frequency to regulate motor performance.
- Feedback Layer: Uses encoder/resolver data to compare actual motor position/speed with the commanded values, enabling closed-loop correction via the drive’s PID algorithm.
In a robotic assembly system, the S20660-SRS controls a servo motor driving a precision gripper. The PLC sends position commands to the drive, which adjusts the motor to position the gripper within ±0.01mm of the target. Encoder feedback ensures the drive corrects for any positional errors in real time, while torque limiting prevents damage to delicate components during gripping.
Related Models in the Series
- DANAHER S20660-SRH: High-power variant with 7A continuous current (21A peak), supporting motors up to 1.5kW, ideal for heavy-duty applications like CNC machines.
- DANAHER S20660-SRC: Compact version with integrated motion controller, eliminating the need for an external master controller in single-axis systems.
- DANAHER S20660-SRL: Low-voltage model (24-48V DC input) designed for battery-powered or mobile applications (e.g., AGVs, portable automation).
- DANAHER S20660-SRP: Explosion-proof drive (ATEX/IECEx certified) for hazardous environments such as chemical processing or oil and gas facilities.
- DANAHER S20660-SRM: Multi-axis synchronization model, supporting coordinated motion between up to 4 axes (e.g., robotic arms, packaging lines).
- DANAHER S20660-SRT: EtherCAT-enabled drive with high-speed communication (100Mbps), optimized for time-critical applications like semiconductor wafer handling.
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