ProductPRODUCT
Featured products
Contact Us
- Allen Bradley
- 20-COMM-ER
- PowerFlex EtherNet/IP Dual-Port Communication Adapter
- USA
- 86 x 19 x 78.5 mm
- 0.085 kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
- DHL, UPS, TNT, FedEx and EMS.
- 24-Hour Service
- COO
- 8
Our advantage
Global Logistics
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.
| Company Information | |||
| [email protected] | |||
| Mobile | +8615980777398 | ||
| +8615980777398 | |||
| 15980777398 |
Product Overview
The Allen-Bradley 20-COMM-ER is a dual-port EtherNet/IP communication adapter used with PowerFlex AC drives. It enables high-speed industrial Ethernet communication and supports Daisy-chain (line topology) networking, reducing the need for external switches in some applications.
It is commonly used in Rockwell Automation systems where flexible network design and reliable real-time drive control are required.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Model | 20-COMM-ER |
| Product Type | EtherNet/IP Dual-Port Communication Adapter |
| Function | Drive communication interface |
| Protocol | EtherNet/IP (CIP-based industrial Ethernet) |
| Ethernet Ports | 2 × RJ45 (dual-port switch built-in) |
| Network Topology | Line, star, or ring (DLR support depending on system) |
| Data Rate | 10/100 Mbps |
| Installation | Internal PowerFlex drive-mounted module |
| Compatibility | PowerFlex 70 / 700 / 700H / 700S / 750 series |
| Weight | ~0.085 kg |
| Dimensions | 86 × 19 × 78.5 mm |
Function and Working Principle
The 20-COMM-ER functions as a communication bridge between PowerFlex drives and EtherNet/IP networks, with an integrated 2-port switch. It operates by:
- Translating DPI drive communication into EtherNet/IP protocol
- Allowing direct PLC control of motor speed, torque, and status
- Supporting cyclic I/O and explicit messaging
- Enabling daisy-chain Ethernet wiring between multiple drives
Role in Industrial Systems
This adapter improves industrial networking by enabling:
- Reduced Ethernet switch requirements in drive networks
- Simplified wiring for multi-drive systems
- Real-time deterministic control via EtherNet/IP
- Integration with ControlLogix and CompactLogix PLCs
Industrial Applications
- Conveyor systems with multiple motors
- Packaging and bottling lines
- Material handling systems
- Pumping and HVAC systems
- Coordinated multi-drive automation systems
Installation Notes
- Installed in PowerFlex drive communication slot
- Requires correct IP configuration for each drive
- Supports line topology using dual RJ45 ports
- Proper grounding and industrial Ethernet cable shielding required
- Can be used in star or linear network layouts
Compatible Equipment
- PowerFlex 70 / 700 / 700H / 700S / 750 drives
- Allen-Bradley ControlLogix / CompactLogix PLCs
- Industrial Ethernet switches (optional due to dual-port design)
- Rockwell Studio 5000 configuration environment
Recommended Alternative Models
| Model | Type | Application |
|---|---|---|
| 20-COMM-E | Single-port EtherNet/IP adapter | Standard Ethernet networks |
| 20-COMM-D | DeviceNet adapter | Legacy fieldbus systems |
| 20-COMM-C | ControlNet adapter | Deterministic legacy networks |
| PowerFlex 750 embedded Ethernet | Integrated solution | Modern drives |
Key Advantages
- Dual-port Ethernet for daisy-chain wiring
- Reduced need for external switches
- High-speed EtherNet/IP communication
- Strong integration with Rockwell PLC systems
- Flexible industrial network design
- Reliable real-time motor control
Limitations
- Requires correct IP and network configuration
- Still based on DPI drive architecture (not fully native Ethernet drive control)
- Sensitive to improper cabling or EMI in harsh environments
Conclusion
The Allen-Bradley 20-COMM-ER EtherNet/IP Dual-Port Adapter is a flexible industrial communication module designed to simplify multi-drive Ethernet networking.
With its built-in switch functionality and strong EtherNet/IP integration, it is widely used in modern automation systems requiring scalable and efficient motor control architectures.