Danaher S20660-SRS Drive | With Embedded Safety Functions (STO)

Description

Application Scenarios

In a high-speed packaging line for consumer electronics, the precise placement of components onto a moving conveyor belt is critical. A robotic pick-and-place unit, powered by a servo motor, must accelerate, decelerate, and stop with micron-level repeatability at rates of over 100 cycles per minute. The DANAHER S20660-SRS​ servo drive is the component that makes this possible. It receives high-speed position commands from the machine’s motion controller. Within milliseconds, its advanced algorithms calculate the exact current required for the motor to follow the trajectory perfectly. The drive’s high switching frequency and robust control loops dynamically compensate for load changes, ensuring each component is placed accurately even as mechanical wear occurs. The S20660-SRS​ solves the key pain points of cycle time, precision, and consistent quality, enabling the packaging machine to achieve higher throughput with zero defect rates.

Parameter

Technical Principles and Innovative Values

The DANAHER S20660-SRS​ embodies a fusion of high-density power electronics and sophisticated software-based control, delivering both raw power and intelligent motion.

Innovation Point 1: Advanced, Adaptive Control Algorithms.​ Beyond basic PID loops, the S20660-SRS​ incorporates advanced control features like advanced feedforward control, notch filters, and adaptive vibration damping. These algorithms automatically compensate for mechanical resonances in the machine structure (e.g., a long ball screw or a cantilevered arm), allowing for higher servo gains without instability. This results in significantly reduced settling times, enabling faster cycle times and improved accuracy on demanding kinematic systems.

Innovation Point 2: Integrated Safety and Connectivity.​ The drive is engineered with built-in Safe Torque Off (STO) functionality, allowing it to be integrated directly into a machine’s safety circuit without the need for external safety relays. This simplifies cabinet design, reduces wiring, and meets international safety standards. Furthermore, its support for multiple real-time industrial Ethernet protocols (like EtherCAT and PROFINET) allows for seamless, deterministic integration into virtually any modern machine control architecture, future-proofing the investment.

Innovation Point 3: High Power Density and Dynamic Response.​ The S20660-SRS​ utilizes advanced power semiconductor packaging and optimized thermal design to deliver a high continuous and peak current output from a relatively compact form factor. This high power density, combined with a very fast current loop update time (often in the microsecond range), provides the instantaneous torque response needed for highly dynamic applications like flying shears, robotics, and stamping presses, where motor torque must change almost instantaneously to follow the command.

Application Cases and Industry Value

Case Study: Precision Metal Stamping Press Retrofit

A manufacturer of automotive electrical connectors was facing quality issues and speed limitations with an older hydraulic press. The inconsistent force and slow cycle time were creating bottlenecks. They retrofitted the press with an all-electric servo system, using a DANAHER S20660-SRS​ drive to control the main axis servo motor.

Process & Improvement:​ The S20660-SRS​ was programmed to manage a complex motion profile: rapid approach, controlled deceleration, precise pressing with programmable force (via torque control), and fast retraction. Its adaptive tuning capabilities compensated for the mechanical load changes during the press cycle. The immediate result was a 40% increase in strokes per minute​ due to the servo’s faster acceleration/deceleration. More importantly, the precise, repeatable force control eliminated part deformation and flash, reducing scrap by over 90%. The maintenance manager highlighted the diagnostic capabilities of the drive’s software, which provided clear alerts for preventive maintenance, and the S20660-SRS’s reliability eliminated the hydraulic system’s constant leaks and oil changes, slashing annual maintenance costs.

Related Product Combination Solutions

The DANAHER S20660-SRS​ is designed to be part of a complete, optimized motion system.

DANAHER AKM​ Series Servo Motors: The ideal motor pairing, offering a matched set of high-performance, low-cogging motors specifically designed to work optimally with Danaher drives like the S20660-SRS​ for peak system performance.

DANAHER AKD​ Series Drives: A closely related family of drives; the S20660-SRS​ may be part of or compatible with this series, sharing the same configuration software and design philosophy.

Kollmorgen KAS​ Software: The primary configuration, tuning, and diagnostic software suite used to set up, optimize, and troubleshoot the S20660-SRS​ drive and its connected motor.

Danaher/ Kollmorgen Cables (Motor Feedback & Power):​ Specifically shielded and impedance-matched motor power and feedback cables that ensure signal integrity, minimize electrical noise, and maximize the performance and reliability of the S20660-SRS​ system.

Kollmorgen AKD-P​ Programmable Drives: A variant that includes a full machine controller within the drive; the S20660-SRS​ could be the power stage in such a system or a non-programmable companion for centralized control architectures.

External Line Reactor/ Filter:​ A recommended external component to protect the S20660-SRS​ from mains-borne power disturbances and to reduce harmonic feedback into the plant’s power system, ensuring longer component life and EMC compliance.

Installation, Maintenance, and Full-Cycle Support

Proper installation of the DANAHER S20660-SRS​ is crucial for reliable operation. It involves mounting the drive on a proper heat sink or ensuring adequate airflow, following strict guidelines for 3-phase power wiring, motor connection, and safety ground. Special attention must be paid to the routing and shielding of the motor feedback cable to avoid electrical noise issues. The integrated STO safety terminals must be wired correctly into the machine’s safety circuit.

Maintenance is greatly facilitated by the drive’s extensive diagnostic capabilities. The associated configuration software provides real-time monitoring of key parameters like internal temperature, DC bus voltage, output current, and fault history. Predictive maintenance alerts can be set for parameters like heat sink temperature. Should a fault occur, the drive logs detailed error codes that drastically reduce troubleshooting time. Firmware updates are released periodically to enhance features or performance and can be applied via the service software. We provide comprehensive support for the S20660-SRS, from initial sizing and system design, through commissioning and tuning assistance, to long-term spare parts supply. Our motion control experts can help optimize your machine’s performance and ensure you get the maximum lifetime from your drive investment.

Optimize your machine’s performance with precision motion control. Contact us for expert support and genuine Danaher S20660-SRS servo drive solutions.