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- Allen Bradley
- 20-COMM-C
- PowerFlex ControlNet Communication Adapter
- USA
- 103 x 16 x 80 mm
- 0.085 kg
- Xiamen, China
- New & In Stock
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- 1 Year
- 1-3 Working Days
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The 20-COMM-C ControlNet Communication Adapter is a communication module used with Allen-Bradley PowerFlex AC drives. It allows the drive to connect directly to a ControlNet industrial network, enabling real-time data exchange with PLC systems such as ControlLogix.
It is mainly used in legacy industrial automation systems where deterministic, high-speed network communication is required.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Model | 20-COMM-C |
| Product Type | ControlNet Communication Adapter |
| Network Protocol | ControlNet |
| Function | Drive-to-PLC communication interface |
| Installation | Internal drive-mounted module |
| Compatibility | PowerFlex 700 / 700H / 700S series |
| Data Rate | 5 Mbps (ControlNet standard) |
| Weight | ~0.085–0.5 kg (varies by configuration) |
| Dimensions | ~103 × 80 × 16 mm |
Function and Working Principle
The module works as a protocol converter between the PowerFlex drive and ControlNet network. Its main functions include:
- Converting internal drive communication (DPI) to ControlNet protocol
- Enabling real-time read/write of drive parameters
- Supporting cyclic I/O data exchange with PLC systems
- Providing deterministic communication for industrial control loops
Role in Industrial Systems
The 20-COMM-C is used to integrate AC drives into centralized PLC-controlled automation systems, enabling:
- Real-time motor control from PLC
- Central monitoring of drive parameters
- Coordinated multi-drive operation
- Reliable deterministic industrial networking
Applications
- Conveyor systems
- Packaging machines
- Process control plants
- Industrial motor networks
- Large-scale automation systems
Installation Notes
- Installed directly into the PowerFlex drive communication slot
- Requires correct ControlNet node address configuration
- Must use properly terminated coaxial ControlNet cabling
- Network grounding and shielding are critical for stability
Compatible Equipment
- PowerFlex 700 / 700S / 700H drives
- ControlLogix PLC systems
- ControlNet network infrastructure
Key Advantages
- Reliable real-time industrial communication
- Strong integration with Rockwell PLC systems
- Deterministic network performance
- Stable legacy automation support
- Supports multi-drive control architectures
Limitations
- Legacy technology (ControlNet is largely replaced by EtherNet/IP)
- Requires specialized coaxial network infrastructure
- Less flexible compared to modern Ethernet-based solutions
Conclusion
The Allen-Bradley 20-COMM-C ControlNet Adapter is a legacy but still widely used communication module that enables PowerFlex drives to integrate into ControlNet-based industrial control systems, providing deterministic and reliable PLC-to-drive communication.