Flexible modularity for decentral servo applications
The VLT® Decentral Servo Drive DSD 520 extends the VLT® FlexMotion™ decentral servo drive concept. Supporting a wide range of feedback encoders and sensorless control, its architecture is completely open and allows you to choose your preferred PM or ACM motor.
Use the Integrated Motion Controller (IMC) to run the motion sequence independently and free up capacity in the central PLC.
Fast and fail-safe installation
The Plug and Twist hybrid cabling concept, including supply and control voltage as well as functional safety and fieldbus wires, makes the installation fast, easy, fail-safe end cost-efficient. Since multiple decentral drive units can be powered by a single VLT® Power Supply Module PSM 520 equipped with Decentral Access Module (DAM) factory option through simple daisy chain wiring, no distribution boxes are required, and you can reduce cabling to a minimum.
Choose your preferred protocol
Open connectivity to common real-time Ethernet systems, such as EtherCAT, POWERLINK and PROFINET, IEC 61131-3 based programming and PLCopen certified Motion libraries makes the system even more flexible and easy to integrate into various engineering environments.
High performance in harsh environments
A completely smooth and easy-to-clean surface together with high-protection IP67 enclosures and vibration resistance class 3M7 ensures the perfect fit for all kind of rotating applications in demanding environments.
Rated voltage, power and current
Rated voltage
565 – 680 V DC ±10%
Rated power
3 kW
Rated current
4.5 A
Features and benefits
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The extensive VLT® FlexMotion portfolio with a mix of central and decentral components fits perfectly into modular machine concepts
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Supports various encoder feedback systems and expands the freedom of of PM servo and ACM motor selection
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Fast and fail-safe wiring concept helps to save installation time and component costs
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Open connectivity to common real time Ethernet protocols allows flexibility, fast process communication and easy system integration
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VLT® FlexSafety™ support of advanced functional safety: PROFIsafe and FSoE (Safety over EtherCAT)
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PLCopen certified Motion libraries and IEC 61131-3 programming provide a standardized and easy system approach across controller platforms
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Comprehensive real-time system data from each component strongly supports predictive and preventive machine maintenance
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Vibration resistance according to 3M7 and IP67 protection ratings ensures reliable operation in demanding environments
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Servo drive mounted directly on or nearby the motor reduces cabinet space requirement and costs for cooling equipment
Documents
| Type | Name | Language | Valid for | Updated | Download | File type |
|---|---|---|---|---|---|---|
| Operating guide | Advanced Functional Safety for VLT FlexMotion | English | Multiple | 03 Apr, 2025 | 5.3 MB | |
| Fact sheet | VLT FlexMotion | English | Multiple | 21 Aug, 2025 | 1.6 MB | |
| Fact sheet | VLT FlexMotion - Italian | Italian | Multiple | 24 Oct, 2025 | 834.1 KB | |
| Brochure | VLT FlexMotion SG | English | Multiple | 21 Aug, 2025 | 12.7 MB | |
| Brochure | VLT FlexMotion SG - Chinese | Chinese | Multiple | 22 Sep, 2025 | 12.2 MB | |
| Brochure | VLT FlexMotion SG - German | German | Multiple | 24 Oct, 2025 | 12.3 MB | |
| Operating guide | VLT Servo Drive System ISD 520/DSD 520 | English | Multiple | 21 Mar, 2025 | 21.7 MB | |
| Brochure | VLT® FlexMotion - Italian | Italian | Multiple | 24 Oct, 2025 | 12.3 MB |
3D models and drawings
| Type | Name | Language | Updated | Download | File type |
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Software
| Type | Software Characteristic | Name | Version | Language | Released | Status | Download | File type |
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Related applications
Packaging, food and beverage and pharmaceutical machinery applications.
Reduce cost, complexity, and programming time in servo applications by using an AC drive for high-precision positioning and synchronization.