Excellent PLC
Product Introduction
The Allen-Bradley 1321-M048 Common Mode Choke is designed to reduce electrical noise and interference generated by variable frequency drives, particularly in applications using PowerFlex and 1336 drive series. In modern industrial environments where drives operate at high switching frequencies, unwanted electromagnetic interference can affect nearby equipment. This component helps mitigate those effects, improving overall system stability.
Installed between the drive and the motor, the choke acts as a passive filtering device. It limits common mode currents that typically flow through unintended paths such as grounding systems or cable shields. By doing so, it protects sensitive equipment, reduces electrical disturbances, and helps maintain compliance with electromagnetic compatibility requirements.
From a practical perspective, this model features an open-style design that allows for efficient heat dissipation and easy inspection during maintenance. It is commonly selected in drive systems where interference control is a concern, especially in installations with long motor cables or complex electrical layouts.
Product Specifications
| Parameter | Description |
|---|---|
| Model | 1321-M048 |
| Manufacturer | Allen-Bradley |
| Product Type | Common Mode Choke |
| Design Style | Open Style |
| Rated Current | 48 A |
| Typical Application Drives | PowerFlex and 1336 Drives |
| Drive Power Range (460 VAC) | 7.5 – 30 HP |
| Drive Power Range (575 VAC) | 7.5 – 40 HP |
| Function | Reduction of common mode noise and interference |
| Installation Position | Between drive and motor |
| Cooling Method | Natural air cooling |
| Application Role | EMI suppression and system protection |
| Dimensions | 101.6 × 73.7 × 100.1 mm |
| Weight | 0.54 kg |
Applications
• Variable frequency drive systems
Installed to reduce electromagnetic interference generated by drives, ensuring smoother system operation.
• Motor-driven industrial equipment
Helps protect motors and connected equipment from undesired electrical noise and leakage currents.
• Facilities with sensitive electronic equipment
Used where interference suppression is critical, such as in plants with instrumentation and control systems.
• Long motor cable installations
Reduces the impact of cable-induced noise, improving signal stability and equipment lifespan.
• Multi-drive environments
Supports systems where multiple drives operate simultaneously, helping maintain overall electrical compatibility.
Advantages
• Effective EMI reduction
Minimizes common mode currents, reducing interference with nearby electrical devices.
• Improved system reliability
Helps prevent disturbances that could affect control systems and sensitive electronics.
• Compatibility with major drive series
Designed specifically for PowerFlex and 1336 drives, ensuring optimal performance.
• Open-style construction
Allows for better heat dissipation and easy inspection, simplifying maintenance.
• Enhanced equipment protection
Reduces stress on insulation systems and components, contributing to long-term system stability.
• Simple integration
Easily installed into existing drive systems without requiring complex modifications.
