Understanding the Letter Designations in Parker Hannifin 590 and 591 Series Drives
Ever wanted to know what the letters after Parker Hannifin’s 590 and 591 Series Drives part numbers mean?
Here the SDS team explain their meaning and offer guidance on interchangeability when a specific model is not in stock.
Parker 590 and 591 Drives
Parker Hannifin’s 590 and 591 series DC drives are well-known for their reliability, precision, and flexibility in controlling DC motors across various industries. However, many users find the letter designations following the main part numbers confusing. These letters (P, PX, S, DRV) carry specific meanings and refer to key features or configurations of the drive.
In this article, we’ll explain what each letter means and explore whether different versions can be interchanged if your exact part number is unavailable.
1. 590P and 591P: Standard Drives
The 590P and 591P refer to the standard versions of Parker’s DC drives. These drives provide advanced digital control with a fully regenerative capability. The “P” designation highlights that these drives are part of the Performance Series:
- 590P: Single-quadrant drive for controlling DC motors in a non-regenerative mode.
- 591P: Similar to the 590P, but the difference is typically tied to its use for applications requiring four-quadrant (regenerative) operation, meaning it can drive the motor in forward and reverse and brake using regenerative braking.
Key Features:
- Full digital control
- Advanced performance for industrial applications
- Regenerative capability (for 591P)
2. 590PX and 591PX: Enhanced Performance
The PX in the 590PX and 591PX refers to an Enhanced Performance Series. These drives come with additional features compared to the standard P versions. The “X” indicates extra functionality, such as enhanced cooling, extra firmware capabilities, or improved response times.
- 590PX: Enhanced performance for single-quadrant applications.
- 591PX: Enhanced performance for four-quadrant applications with regenerative braking.
Key Features:
- Extended firmware options
- Enhanced cooling capabilities
- Improved response time for demanding applications
3. 590S and 591S: Simplified Models
The S designation stands for Simplified or Standard versions. These models are generally stripped down in terms of advanced features but provide core drive functionality for more straightforward applications where the high-end features of the P or PX models aren’t necessary.
- 590S: Standard single-quadrant control for basic DC motor applications.
- 591S: Standard four-quadrant regenerative drive with simplified settings.
Key Features:
- Essential control features
- Lower cost for basic industrial needs
- Ideal for less demanding environments
4. 590DRV and 591DRV: Drive Only Modules
The DRV designation stands for Drive Module Only. These drives are modular units, which means they come without the complete enclosure or the additional components found in standard drives. The DRV versions are often used in larger, custom installations where users may already have external controllers, power supplies, or other system elements in place.
- 590DRV: Modular drive for single-quadrant applications.
- 591DRV: Modular drive for four-quadrant regenerative applications.
Key Features:
- Modular design for integration into larger systems
- Lacks enclosure and some auxiliary components
Can One Model Be Used in Place of Another?
One common question is whether you can use a different model (e.g., a 590P instead of a 590PX) when a specific model is not in stock.
The short answer is it depends on your application:
- 590P vs. 590PX: If you require the enhanced features provided by the PX version, such as extra cooling or advanced firmware, the 590P may not be suitable as a direct replacement. However, for basic motor control, a 590P may work in place of a 590PX.
- 591P vs. 591S: The 591P offers more advanced control features than the 591S. While the 591S can be used in place of the 591P for simpler applications, it may not perform as well in high-demand environments, especially where regenerative braking is critical.
- DRV Versions: The DRV versions should only be replaced with other DRV versions. These modular drives are designed for specific installations, so replacing them with a standard enclosed drive would require substantial changes to your setup.
Key Considerations for Replacement:
- Application Demands: Ensure that the replacement drive meets the voltage, current, and control requirements of your motor and application.
- Quadrant Control: If your application requires four-quadrant operation (regenerative braking), make sure the replacement model has this capability (i.e., don’t replace a 591P with a 590P).
- Firmware & Features: Some models (like PX) come with advanced firmware options. Replacing them with a base model may result in loss of functionality.
Conclusion
Understanding the differences between the P, PX, S, and DRV versions of the Parker Hannifin 590 and 591 Series drives is crucial for selecting the right drive for your application. While some models may be interchangeable for basic applications, it’s important to evaluate your specific requirements to ensure a successful replacement.
If you’re unsure which model to use or if you need assistance with sourcing, feel free to reach out to us at SDS Drives, and we’ll help you find the best solution for your application needs. Drop the SDS team an email: info@sdsdrives.com
