Technical specifications, features, applications and purchasing information.
| Brand | Allen-Bradley |
| Model | 20-COMM-ER |
| Product Category | EtherNet/IP Communication Adapter |
| Manufacturer | Rockwell Automation |
| Manufacturer Description | SMC / PowerFlex 7-Class Dual-Port EtherNet/IP Adapter Communications Module |
| Adapter Configuration | Dual-Port Industrial Ethernet Network Adapter |
| Network Protocol | EtherNet/IP |
| Ethernet Ports | 2 |
| Ethernet Connector Type | RJ45 |
| Ethernet Cable Interface | CAT5-Compatible Ethernet Connection |
| Ethernet Speed | 10/100 Mbps |
| Duplex Modes | Half Duplex and Full Duplex |
| Network Topology | Star and Device Level Ring (DLR) |
| Quality of Service | QoS Supported |
| Maximum TCP Connections | 30 |
| Supported Class 1 Connections | 2 |
| Supported Class 3 Connections | 14 |
| Minimum Requested Packet Interval | 2 ms |
| Host Communication Interface | Drive Peripheral Interface (DPI) |
| DPI Data Rates | 125 kbps or 500 kbps |
| DPI Connector | 20-Pin Single-Row Shrouded Header |
| Host Power Supply | 5 VDC Supplied by Compatible Drive or DPI External Communications Kit |
| Current Consumption | 482 mA at 5 VDC, According to User Manual Publication 20COMM-UM015B |
| External Ethernet Power Supply | Not Required for Standard Host-Powered Installation |
| IP Address Configuration | BOOTP/DHCP or Adapter Configuration Parameters and Switches |
| Subnet Mask Configuration | Supported |
| Gateway Configuration | Supported |
| Implicit I/O Messaging | Supported |
| Explicit Messaging | Supported |
| I/O Data Exchange | Logic Command, Reference, Logic Status and Feedback |
| Datalink Support | Up to Four Pairs of Datalinks |
| Control Hierarchy | Master-Slave or Peer-to-Peer |
| Communication Fault Action | Configurable |
| Idle Fault Action | Configurable |
| Diagnostic Indicators | 4 Status Indicators |
| Embedded Web Pages | Supported; Configurable Web Access |
| Web-Based Process Monitoring | Supported |
| Web-Based Diagnostics | Supported |
| Email Fault Notifications | Configurable with Suitable Network and SMTP Settings |
| Network Configuration Software | Connected Components Workbench and Compatible Rockwell Drive Configuration Tools |
| PLC Integration | Compatible ControlLogix and Other Supported EtherNet/IP Controllers |
| Compatible Drive Family | PowerFlex 70 / 70EC |
| Additional Compatible Drives | PowerFlex 700 / 700VC, 700H, 700S, 700L and 7000 / 7000-2 |
| DC Drive Compatibility | Compatible PowerFlex Digital DC Drives |
| Smart Motor Controller Compatibility | SMC Flex and SMC-50 |
| External Communications Kit | Compatible DPI External Comms Kit, 20-XCOMM-DC-BASE |
| PowerFlex 750-Series Compatibility | Not Compatible, According to Manufacturer User Manual |
| Mounting Location | Compatible Drive or Smart Motor Controller Communication Slot |
| Securing Method | Captive Mounting and Grounding Screws |
| Module Height | 19 mm |
| Module Length | 86 mm |
| Module Width | 78.5 mm |
| Shipping Weight | 150 g |
| Operating Temperature | -10 to +50°C |
| Storage Temperature | -40 to +85°C |
| Relative Humidity | 5% to 95%, Noncondensing |
| Environmental Restrictions | Avoid Volatile or Corrosive Gases, Vapors and Dust |
| Regulatory Standards, Drive Applications | UL 508C, CAN/CSA C22.2 No. 14 and EN 61800-3, According to Manufacturer Manual |
| UPC | 885630298160 |
| Product Lifecycle Status | Active Mature |
| Manufacturer Firmware Download | Version 1.008 Listed in Rockwell Automation Product Catalog |
| Related Single-Port Model | 20-COMM-E; Different Network Features and Compatibility Requirements |
| Manufacturer User Manual | Rockwell Automation Publication 20COMM-UM015 |
| Manufacturer Installation Instructions | Rockwell Automation Publication 20COMM-IN004 |
| Manufacturer Product Reference | https://www.rockwellautomation.com/en-us/products/details.20-COMM-ER.html |
| Manufacturer Manual Reference | https://literature.rockwellautomation.com/idc/groups/literature/documents/um/20comm-um015_-en-p.pdf |
The Allen-Bradley 20-COMM-ER provides two industrial Ethernet ports for connecting compatible PowerFlex 7-Class drives and smart motor controllers to an EtherNet/IP network. The adapter supports 10/100 Mbps communication with half-duplex and full-duplex operation.
The dual-port architecture supports Device Level Ring and compatible star network arrangements. DLR connectivity provides a network-topology option for industrial automation systems when used with appropriately configured ring components and supervision.
The adapter supports implicit I/O messaging, explicit messaging, Logic Command and Reference exchange, and up to four pairs of Datalinks. These functions enable compatible controllers to exchange operating commands, feedback and selected parameter information with connected drives.
Configurable web pages provide access to adapter information, connected device status, network statistics and diagnostic information. Supported email notification functions can report selected faults and communication events when the network and mail settings are configured.
BOOTP/DHCP, adapter parameters and physical address or mode switches provide options for establishing network settings. Four onboard status indicators assist technicians with identifying communication and network conditions during commissioning and troubleshooting.
The 20-COMM-ER is designed for supported PowerFlex 7-Class and related drive systems, PowerFlex Digital DC drives, and SMC Flex or SMC-50 controllers. Its host-powered DPI interface supports installation in compatible communication slots without a separate network-side power source.
We support online purchase of the Allen-Bradley 20-COMM-ER EtherNet/IP Communication Adapter. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
What is the Allen-Bradley 20-COMM-ER?
It is a Rockwell Automation dual-port EtherNet/IP communication adapter used to connect supported PowerFlex 7-Class drives and SMC motor controllers to industrial Ethernet networks.
How many Ethernet ports does the module have?
The 20-COMM-ER has two Ethernet ports and supports 10 Mbps and 100 Mbps operation in half-duplex or full-duplex modes.
Does the 20-COMM-ER support Device Level Ring networks?
Yes. The module supports Device Level Ring topology as well as compatible star networks. Ring fault tolerance depends on the overall network design and properly configured DLR components.
Which PowerFlex drives are compatible?
Rockwell Automation documents compatibility with PowerFlex 70, 70EC, 700, 700VC, 700H, 700S, 700L, 7000 and 7000-2 drive families, together with selected PowerFlex Digital DC products. Verify the exact host model and firmware before installation.
Is the 20-COMM-ER compatible with PowerFlex 753 or 755 drives?
No. The Rockwell Automation 20-COMM-ER user manual explicitly states that the adapter is not compatible with PowerFlex 750-Series drives. PowerFlex 753 and 755 systems require their own supported network communication arrangements.
Can the adapter be used with SMC Flex or SMC-50?
Yes. Both SMC Flex and SMC-50 smart motor controllers are included in the manufacturer's compatible-product list. Verify the exact controller configuration and firmware requirements.
What is the difference between 20-COMM-ER and 20-COMM-E?
The 20-COMM-ER provides dual Ethernet ports with Device Level Ring support. The 20-COMM-E is a different, single-port EtherNet/IP adapter with different installation and compatibility capabilities. They should not be assumed interchangeable.
Does the 20-COMM-ER require an external power supply?
No separate network-side power supply is required for standard installation. It receives 5 VDC power from the compatible host through the DPI interface. The user manual lists 482 mA consumption at 5 VDC.
What is the DPI communication speed?
The adapter communicates with its host through the Drive Peripheral Interface at 125 kbps or 500 kbps, depending on the supported host configuration.
Does the adapter support implicit and explicit messaging?
Yes. The 20-COMM-ER supports implicit I/O messaging for configured data exchange and explicit messaging for supported parameter and diagnostic operations. It also supports up to four pairs of Datalinks.
How is the IP address configured?
Network addressing can be configured through BOOTP/DHCP, adapter parameters or supported address switches. Proper subnet mask and gateway settings are needed where required by the industrial network design.
Does the 20-COMM-ER have built-in diagnostic functions?
Yes. Four status indicators display communication conditions. The embedded web interface can also provide device information, network statistics and diagnostics when web access has been enabled.
Can the module send email fault notifications?
Yes. The adapter supports configurable email notifications for selected drive faults, cleared faults and communication or idle events. A suitable SMTP server and network configuration are required.
What are the module dimensions?
The manufacturer's user manual lists 19 mm height, 86 mm length and 78.5 mm width, with a shipping weight of approximately 150 g.
What is the operating temperature range?
The specified operating range is -10 to +50°C. The relative humidity range is 5% to 95%, noncondensing, and the module must be protected from corrosive or volatile atmospheres.
Is the Allen-Bradley 20-COMM-ER discontinued?
Rockwell Automation identifies the 20-COMM-ER as Active Mature in its product catalog. This is a lifecycle designation and should be checked again when planning long-term equipment maintenance.
What should be checked before ordering?
Confirm the complete catalog number 20-COMM-ER, dual-port 10/100 Mbps EtherNet/IP requirement, DLR topology, compatible PowerFlex or SMC host, DPI interface and firmware, intended controller, network configuration, mounting arrangement and the distinction from 20-COMM-E. Do not select this module for a PowerFlex 750-Series drive.
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| Brand | Allen-Bradley |
| Model | 20-COMM-ER |
| Product Category | EtherNet/IP Communication Adapter |
| Manufacturer | Rockwell Automation |
| Manufacturer Description | SMC / PowerFlex 7-Class Dual-Port EtherNet/IP Adapter Communications Module |
| Adapter Configuration | Dual-Port Industrial Ethernet Network Adapter |
| Network Protocol | EtherNet/IP |
| Ethernet Ports | 2 |
| Ethernet Connector Type | RJ45 |
| Ethernet Cable Interface | CAT5-Compatible Ethernet Connection |
| Ethernet Speed | 10/100 Mbps |
| Duplex Modes | Half Duplex and Full Duplex |
| Network Topology | Star and Device Level Ring (DLR) |
| Quality of Service | QoS Supported |
| Maximum TCP Connections | 30 |
| Supported Class 1 Connections | 2 |
| Supported Class 3 Connections | 14 |
| Minimum Requested Packet Interval | 2 ms |
| Host Communication Interface | Drive Peripheral Interface (DPI) |
| DPI Data Rates | 125 kbps or 500 kbps |
| DPI Connector | 20-Pin Single-Row Shrouded Header |
| Host Power Supply | 5 VDC Supplied by Compatible Drive or DPI External Communications Kit |
| Current Consumption | 482 mA at 5 VDC, According to User Manual Publication 20COMM-UM015B |
| External Ethernet Power Supply | Not Required for Standard Host-Powered Installation |
| IP Address Configuration | BOOTP/DHCP or Adapter Configuration Parameters and Switches |
| Subnet Mask Configuration | Supported |
| Gateway Configuration | Supported |
| Implicit I/O Messaging | Supported |
| Explicit Messaging | Supported |
| I/O Data Exchange | Logic Command, Reference, Logic Status and Feedback |
| Datalink Support | Up to Four Pairs of Datalinks |
| Control Hierarchy | Master-Slave or Peer-to-Peer |
| Communication Fault Action | Configurable |
| Idle Fault Action | Configurable |
| Diagnostic Indicators | 4 Status Indicators |
| Embedded Web Pages | Supported; Configurable Web Access |
| Web-Based Process Monitoring | Supported |
| Web-Based Diagnostics | Supported |
| Email Fault Notifications | Configurable with Suitable Network and SMTP Settings |
| Network Configuration Software | Connected Components Workbench and Compatible Rockwell Drive Configuration Tools |
| PLC Integration | Compatible ControlLogix and Other Supported EtherNet/IP Controllers |
| Compatible Drive Family | PowerFlex 70 / 70EC |
| Additional Compatible Drives | PowerFlex 700 / 700VC, 700H, 700S, 700L and 7000 / 7000-2 |
| DC Drive Compatibility | Compatible PowerFlex Digital DC Drives |
| Smart Motor Controller Compatibility | SMC Flex and SMC-50 |
| External Communications Kit | Compatible DPI External Comms Kit, 20-XCOMM-DC-BASE |
| PowerFlex 750-Series Compatibility | Not Compatible, According to Manufacturer User Manual |
| Mounting Location | Compatible Drive or Smart Motor Controller Communication Slot |
| Securing Method | Captive Mounting and Grounding Screws |
| Module Height | 19 mm |
| Module Length | 86 mm |
| Module Width | 78.5 mm |
| Shipping Weight | 150 g |
| Operating Temperature | -10 to +50°C |
| Storage Temperature | -40 to +85°C |
| Relative Humidity | 5% to 95%, Noncondensing |
| Environmental Restrictions | Avoid Volatile or Corrosive Gases, Vapors and Dust |
| Regulatory Standards, Drive Applications | UL 508C, CAN/CSA C22.2 No. 14 and EN 61800-3, According to Manufacturer Manual |
| UPC | 885630298160 |
| Product Lifecycle Status | Active Mature |
| Manufacturer Firmware Download | Version 1.008 Listed in Rockwell Automation Product Catalog |
| Related Single-Port Model | 20-COMM-E; Different Network Features and Compatibility Requirements |
| Manufacturer User Manual | Rockwell Automation Publication 20COMM-UM015 |
| Manufacturer Installation Instructions | Rockwell Automation Publication 20COMM-IN004 |
| Manufacturer Product Reference | https://www.rockwellautomation.com/en-us/products/details.20-COMM-ER.html |
| Manufacturer Manual Reference | https://literature.rockwellautomation.com/idc/groups/literature/documents/um/20comm-um015_-en-p.pdf |
The Allen-Bradley 20-COMM-ER provides two industrial Ethernet ports for connecting compatible PowerFlex 7-Class drives and smart motor controllers to an EtherNet/IP network. The adapter supports 10/100 Mbps communication with half-duplex and full-duplex operation.
The dual-port architecture supports Device Level Ring and compatible star network arrangements. DLR connectivity provides a network-topology option for industrial automation systems when used with appropriately configured ring components and supervision.
The adapter supports implicit I/O messaging, explicit messaging, Logic Command and Reference exchange, and up to four pairs of Datalinks. These functions enable compatible controllers to exchange operating commands, feedback and selected parameter information with connected drives.
Configurable web pages provide access to adapter information, connected device status, network statistics and diagnostic information. Supported email notification functions can report selected faults and communication events when the network and mail settings are configured.
BOOTP/DHCP, adapter parameters and physical address or mode switches provide options for establishing network settings. Four onboard status indicators assist technicians with identifying communication and network conditions during commissioning and troubleshooting.
The 20-COMM-ER is designed for supported PowerFlex 7-Class and related drive systems, PowerFlex Digital DC drives, and SMC Flex or SMC-50 controllers. Its host-powered DPI interface supports installation in compatible communication slots without a separate network-side power source.
We support online purchase of the Allen-Bradley 20-COMM-ER EtherNet/IP Communication Adapter. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
What is the Allen-Bradley 20-COMM-ER?
It is a Rockwell Automation dual-port EtherNet/IP communication adapter used to connect supported PowerFlex 7-Class drives and SMC motor controllers to industrial Ethernet networks.
How many Ethernet ports does the module have?
The 20-COMM-ER has two Ethernet ports and supports 10 Mbps and 100 Mbps operation in half-duplex or full-duplex modes.
Does the 20-COMM-ER support Device Level Ring networks?
Yes. The module supports Device Level Ring topology as well as compatible star networks. Ring fault tolerance depends on the overall network design and properly configured DLR components.
Which PowerFlex drives are compatible?
Rockwell Automation documents compatibility with PowerFlex 70, 70EC, 700, 700VC, 700H, 700S, 700L, 7000 and 7000-2 drive families, together with selected PowerFlex Digital DC products. Verify the exact host model and firmware before installation.
Is the 20-COMM-ER compatible with PowerFlex 753 or 755 drives?
No. The Rockwell Automation 20-COMM-ER user manual explicitly states that the adapter is not compatible with PowerFlex 750-Series drives. PowerFlex 753 and 755 systems require their own supported network communication arrangements.
Can the adapter be used with SMC Flex or SMC-50?
Yes. Both SMC Flex and SMC-50 smart motor controllers are included in the manufacturer's compatible-product list. Verify the exact controller configuration and firmware requirements.
What is the difference between 20-COMM-ER and 20-COMM-E?
The 20-COMM-ER provides dual Ethernet ports with Device Level Ring support. The 20-COMM-E is a different, single-port EtherNet/IP adapter with different installation and compatibility capabilities. They should not be assumed interchangeable.
Does the 20-COMM-ER require an external power supply?
No separate network-side power supply is required for standard installation. It receives 5 VDC power from the compatible host through the DPI interface. The user manual lists 482 mA consumption at 5 VDC.
What is the DPI communication speed?
The adapter communicates with its host through the Drive Peripheral Interface at 125 kbps or 500 kbps, depending on the supported host configuration.
Does the adapter support implicit and explicit messaging?
Yes. The 20-COMM-ER supports implicit I/O messaging for configured data exchange and explicit messaging for supported parameter and diagnostic operations. It also supports up to four pairs of Datalinks.
How is the IP address configured?
Network addressing can be configured through BOOTP/DHCP, adapter parameters or supported address switches. Proper subnet mask and gateway settings are needed where required by the industrial network design.
Does the 20-COMM-ER have built-in diagnostic functions?
Yes. Four status indicators display communication conditions. The embedded web interface can also provide device information, network statistics and diagnostics when web access has been enabled.
Can the module send email fault notifications?
Yes. The adapter supports configurable email notifications for selected drive faults, cleared faults and communication or idle events. A suitable SMTP server and network configuration are required.
What are the module dimensions?
The manufacturer's user manual lists 19 mm height, 86 mm length and 78.5 mm width, with a shipping weight of approximately 150 g.
What is the operating temperature range?
The specified operating range is -10 to +50°C. The relative humidity range is 5% to 95%, noncondensing, and the module must be protected from corrosive or volatile atmospheres.
Is the Allen-Bradley 20-COMM-ER discontinued?
Rockwell Automation identifies the 20-COMM-ER as Active Mature in its product catalog. This is a lifecycle designation and should be checked again when planning long-term equipment maintenance.
What should be checked before ordering?
Confirm the complete catalog number 20-COMM-ER, dual-port 10/100 Mbps EtherNet/IP requirement, DLR topology, compatible PowerFlex or SMC host, DPI interface and firmware, intended controller, network configuration, mounting arrangement and the distinction from 20-COMM-E. Do not select this module for a PowerFlex 750-Series drive.
