Overview
The Allen-Bradley 321131-A02 is a vector control card PC board assembly engineered for integration with Allen-Bradley PowerFlex drive systems. This board functions as a control interface for the 20B-VECTB-D0 vector drive platform, offering on-board relay logic and field-proven performance in industrial motion control applications. Though discontinued by the manufacturer, the 321131-A02 remains a critical maintenance component for facilities operating legacy drive systems that cannot be immediately upgraded.
Key Features
- Vector control card designed for 20B-VECTB-D0 drive compatibility
- On-board relay control for motor and load management
- 120VAC power specifications for standard industrial voltage
- Compact form factor (0.40 lbs) for space-constrained installations
- Used condition with verified functionality; suitable for replacement and repair applications
Technical Specifications
- Part Number: 321131-A02
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Product Type: PC Board Assembly, Vector Control Card
- Primary Function: Vector drive control interface
- System Compatibility: 20B-VECTB-D0 PowerFlex drives
- Power Requirement: 120VAC
- Control Features: On-board relays for discrete I/O
- Weight: 0.40 lbs
- Condition: Used, tested
- Status: Discontinued by manufacturer
Typical Applications
The 321131-A02 is deployed in industrial machinery and process control systems that rely on PowerFlex variable frequency drives with vector control capability. Common uses include:
- Centrifuge and pump drive control in water treatment and chemical processing
- Conveyor belt speed regulation in material handling systems
- Spindle drive interface for CNC and machine tool applications
- Compressor and fan motor management in HVAC systems
- Replacement board for legacy motion control retrofit and repair
Compatibility & Replacements
The 321131-A02 is specifically engineered for the 20B-VECTB-D0 PowerFlex vector drive platform and is not a universal PLC or I/O module. As a discontinued component, direct replacement boards from Rockwell Automation are no longer manufactured through standard channels. For system upgrades, contact an authorized Allen-Bradley distributor to evaluate modern PowerFlex G-series or Kinetix drive options. For immediate maintenance needs on existing 20B-VECTB-D0 installations, the 321131-A02 remains the OEM-compatible control card. Always verify board revision and firmware compatibility with your drive controller before installation.
