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- Allen Bradley
- 20-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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- 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.
Brand new and original
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 Allen-Bradley 20-COMM-P is a PROFIBUS DP communication adapter designed for PowerFlex AC drives. It enables integration between Rockwell PowerFlex drives and PROFIBUS-based industrial automation systems, commonly used in Siemens-driven environments.
This module allows PLCs to control and monitor drive parameters in real time, supporting standardized industrial fieldbus communication.
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 based fieldbus) |
| Baud Rate | Up to 12 Mbps (auto-negotiation supported) |
| Installation | Internal PowerFlex drive-mounted module |
| Compatibility | PowerFlex 70 / 700 / 700H / 700S / 750 series |
| Weight | ~0.057 kg |
| Dimensions | 86 × 19 × 78.5 mm |
Function and Working Principle
The 20-COMM-P works as a protocol converter between PowerFlex drives and PROFIBUS DP networks. It operates by:
- Converting DPI drive communication into PROFIBUS DP protocol
- Allowing PLCs to control motor speed, start/stop, and torque
- Supporting cyclic I/O data exchange and diagnostics
- Enabling integration into Siemens and multi-vendor automation systems
Role in Industrial Systems
This adapter is widely used in mixed-vendor automation environments, enabling:
- Integration of Allen-Bradley drives into PROFIBUS networks
- Real-time motor control via PLC systems
- Centralized monitoring of industrial drives
- Interoperability between Rockwell drives and Siemens PLC ecosystems
Industrial Applications
- Manufacturing automation lines
- Conveyor and material handling systems
- Packaging machinery
- Process control plants
- Multi-vendor industrial automation systems
Installation Notes
- Installed inside PowerFlex drive communication slot
- Requires correct PROFIBUS node address setting (via DIP switches or software)
- Uses RS-485 shielded twisted pair cabling
- Proper termination resistors required at both ends of network
- Must ensure correct GSD file configuration in PLC
Compatible Equipment
- PowerFlex 70 / 700 / 700H / 700S / 750 drives
- Siemens PLC systems (S7 series)
- PROFIBUS DP network infrastructure
- Engineering tools such as TIA Portal / STEP 7
Recommended Alternative Models
| Model | Type | Application |
|---|---|---|
| 20-COMM-E | EtherNet/IP adapter | Modern Rockwell systems |
| 20-COMM-D | DeviceNet adapter | Legacy fieldbus systems |
| 20-COMM-C | ControlNet adapter | Deterministic legacy networks |
| PowerFlex 750 built-in Ethernet | Native communication | Modern replacement |
Key Advantages
- Enables cross-platform integration (Rockwell + Siemens systems)
- Stable and widely used industrial fieldbus protocol
- Reliable real-time cyclic control
- Supports large-scale distributed automation systems
- Proven compatibility in legacy installations
Limitations
- Legacy fieldbus technology compared to Ethernet-based systems
- Requires precise wiring and termination setup
- Slower configuration compared to modern Ethernet networks
Conclusion
The Allen-Bradley 20-COMM-P PROFIBUS Adapter is a reliable industrial communication module that enables PowerFlex drives to integrate into PROFIBUS DP networks.
It remains widely used in mixed-vendor automation environments where Siemens PLC systems and Rockwell drives operate together in industrial control applications.