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- Allen Bradley
- 22-COMM-P
- PowerFlex Profibus Communication Adapter
- USA
- 86 x 19 x 78.5 mm
- 0.057 kg
- Xiamen, China
- New & In Stock
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The Allen-Bradley 20-COMM-P is a PROFIBUS DP communication adapter used with PowerFlex AC drives. It enables integration between PowerFlex drives and PROFIBUS industrial automation networks, commonly found in Siemens and mixed-vendor control systems.
It provides real-time cyclic data exchange between PLC systems and the drive for motor speed control, status monitoring, and diagnostics.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Model | 20-COMM-P |
| Product Type | PROFIBUS Communication Adapter |
| Function | Drive network communication interface |
| Protocol | PROFIBUS DP (RS-485 fieldbus) |
| Baud Rate | 9.6 kbps to 12 Mbps (auto baud supported) |
| Installation | Internal PowerFlex drive-mounted module |
| Compatibility | PowerFlex 70 / 700 / 700H / 700S / 750 series |
| Network Nodes | Up to 32 per segment |
| Weight | ~0.057 kg |
| Dimensions | 86 × 19 × 78.5 mm |
Function and Working Principle
The 20-COMM-P acts as a protocol converter between PowerFlex drives and PROFIBUS DP networks. It works by:
- Translating internal drive communication (DPI) into PROFIBUS DP protocol
- Allowing PLCs to control motor speed, torque, and direction
- Supporting cyclic I/O data exchange and explicit messaging
- Enabling remote diagnostics and parameter access from PLC engineering tools
Role in Industrial Systems
This adapter is widely used in multi-vendor automation environments, enabling:
- Integration of Allen-Bradley drives into Siemens-based PROFIBUS systems
- Centralized PLC control of distributed motor drives
- Real-time deterministic communication for industrial processes
- Coordination of multiple drives within production systems
Industrial Applications
- Manufacturing automation lines
- Conveyor systems
- Packaging machinery
- Process plants (oil, gas, chemical, water)
- Multi-drive coordinated control systems
Installation Notes
- Installed directly into the PowerFlex drive communication slot
- Requires PROFIBUS node address configuration
- Uses RS-485 shielded twisted-pair cabling
- Proper termination resistors required at both ends of the network
- GSD file required for PLC configuration
Compatible Equipment
- PowerFlex 70 / 700 / 700H / 700S / 750 drives
- Siemens S7 PLC systems and other PROFIBUS masters
- PROFIBUS DP network infrastructure
- Industrial SCADA and HMI systems
Key Advantages
- Stable and deterministic fieldbus communication
- Strong compatibility with Siemens automation ecosystems
- Supports multi-drive network architectures
- Reliable real-time cyclic control
- Proven industrial legacy performance
Limitations
- Legacy fieldbus technology compared to Ethernet-based systems
- Requires strict wiring and termination practices
- Slower configuration compared to modern EtherNet/IP systems
- Increasingly replaced by Ethernet-based communication modules
Conclusion
The Allen-Bradley 20-COMM-P PROFIBUS Adapter enables PowerFlex drives to operate within PROFIBUS DP industrial networks, making it a key component in many legacy and mixed-vendor automation systems.
Despite being a mature technology, it remains widely used in existing industrial installations where stable and deterministic fieldbus communication is required.