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Brand: Allen-Bradley
Allen-Bradley 25-COMM-E2P Dual-Port EtherNet/IP Adapter
Description
A second EtherNet/IP port with ring support for PowerFlex 525 drives
The Allen-Bradley 25-COMM-E2P is a dual-port EtherNet/IP communication adapter for PowerFlex 520-series drives. The 520-TD001 technical data lists it as an embedded communication option, and describes the dual-port card as supporting Device Level Ring (DLR) topologies, which gives fault-tolerant connectivity and better drive availability.
This matters for the PowerFlex 525, which already has one embedded EtherNet/IP port. The extra card provides two RJ45 ports, so drives can be daisy-chained on a line or a ring without an external switch for every drive, saving panel space and cable.
Technical specifications
| Parameter | Specification |
|---|---|
| Catalog number | 25-COMM-E2P |
| Type | Dual-port EtherNet/IP communication adapter |
| Drive compatibility | PowerFlex 520-series drives (user manual 520COM-UM003) |
| Ports | Two RJ45 Ethernet ports (dual-port) |
| Topologies | Device Level Ring (DLR) supported, as described in 520-TD001 |
| Other option cards | 25-COMM-D DeviceNet, 25-COMM-P PROFIBUS DP-V1, 25-COMM-PNET2P PROFINET |
| Embedded alternative | PowerFlex 525 has one embedded EtherNet/IP port |
| Drive series | 25A (PowerFlex 523) and 25B (PowerFlex 525) |
| Network standard | EtherNet/IP, EDS-based setup |
| Documentation | 520COM-UM003 dual-port EtherNet/IP adapter manual |
| Product status | Active per Rockwell product page |
Why choose the dual-port card
The embedded port on the PowerFlex 525 is a single connection, so a switch is needed for each drive in a star layout. With the 25-COMM-E2P, the drives can be wired one after another, and a ring closes the loop back to the controller or a switch. If a cable breaks, traffic reroutes the other way round the ring, and the drives remain online.
The 520-TD001 technical data lists the card among communication option kits together with the DeviceNet, PROFIBUS and PROFINET versions, and recommends the 520COM-UM003 manual for setup. Setup is simplified by EDS files, as the datasheet notes for EtherNet/IP.
In a retrofit, the dual-port card can make an existing machine easier to diagnose, since every drive reports faults and parameters to the controller over the same network that carries the I/O. Plan IP addresses early, keep a record of which drive sits at which node of the ring, and test a deliberate cable break during commissioning to prove that the ring recovers as expected.
Where it fits in the project
Typical use is a line of conveyor or pump drives under a ControlLogix or CompactLogix controller where each drive has its own IP address. Rockwell states that a network can include up to 31 drives for PowerFlex 520-series, using a mix of network types, and each EtherNet/IP node still needs an address plan.
Before ordering, confirm the drive series, firmware revision and mounting arrangement in the 520COM-UM003 manual. Also check that the network design uses DLR-capable switches or a supervisor node, since a ring needs a ring supervisor to manage it.
Related Allen-Bradley products: Allen-Bradley 1794-AENTR FLEX I/O Dual-Port EtherNet/IP Adapter, Allen-Bradley 1734-AENTR POINT I/O Dual Port EtherNet/IP Adapter, Allen-Bradley 1734-AENT POINT I/O EtherNet/IP Adapter, Allen-Bradley 1769-AENTR Compact I/O EtherNet/IP Adapter, Allen-Bradley 5094-AENTR FLEX 5000 EtherNet/IP Adapter and Allen-Bradley 1794-AENT FLEX I/O EtherNet/IP Adapter.
Ordering and documents
Order 25-COMM-E2P exactly as printed. The hosted document is the PowerFlex 520-series technical data 520-TD001I, and the photo is the official Rockwell product photograph of this part. Related communication parts are listed in the Industrial Communications category.
Seven Star LLC is an independent supplier in Muscat and quotes on request. Please confirm the catalog number, ratings and the current product status against the latest Rockwell Automation documents before ordering.
Datasheets & Documents
- Datasheet PowerFlex 520-series AC Drive Specifications Technical Data (520-TD001I-EN-E, September 2025) Download
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About brand
Allen-Bradley is the brand of Rockwell Automation for industrial control: ControlLogix and CompactLogix controllers, I/O systems, PanelView operator terminals, PowerFlex drives, motor control and industrial network equipment. The company began in Milwaukee in 1903, when Lynde Bradley and Dr. Stanton Allen formed the Compression Rheostat Company to make the motor speed controller Bradley had invented in 1901. It took the name Allen-Bradley in 1909 and was bought by Rockwell International in 1985. Since 2001 its owner has been Rockwell Automation, which is still headquartered in Milwaukee, Wisconsin.
Allen-Bradley company profile
| Founded | 1903, Milwaukee, Wisconsin, USA, as the Compression Rheostat Company |
|---|---|
| Founders | Lynde Bradley (inventor of the compression rheostat, 1901) and Dr. Stanton Allen (investor); Harry Bradley joined in 1904 |
| Name | Allen-Bradley Company from 1909 |
| Ownership | Acquired by Rockwell International in 1985 for about USD 1.65 billion; a brand of Rockwell Automation (NYSE: ROK) since 2001 |
| Headquarters | Milwaukee, Wisconsin, USA |
| Product families | Logix programmable automation controllers (ControlLogix, CompactLogix), legacy SLC 500 and MicroLogix PLCs, Micro800 controllers, POINT, FLEX and Compact I/O, PanelView HMIs, PowerFlex AC drives, contactors, motor starters and soft starters, safety components, Stratix Ethernet switches |
Milestones
- 1901: Lynde Bradley invents the compression rheostat to control the speed of electric motors.
- 1903: The Compression Rheostat Company is formed in Milwaukee with an initial investment of USD 1,000.
- 1904: Harry Bradley joins; a crane controller is shown at the St. Louis World's Fair.
- 1909: The company is renamed Allen-Bradley.
- 1985: Rockwell International acquires Allen-Bradley.
- 2001: Rockwell Automation becomes the company's name; the Allen-Bradley brand marks 100 years in 2003.
Reading Allen-Bradley catalogue numbers
The first digits of an Allen-Bradley catalogue number identify the platform, which tells you what is compatible with what. 1756 is ControlLogix (chassis-based, used for large process and plant control), 1769 is CompactLogix 5370 with Compact I/O, 5069 is CompactLogix 5380 with Compact 5000 I/O, 1734 is POINT I/O, 1794 and 5094 are FLEX and FLEX 5000 distributed I/O, 1746 and 1747 belong to the older SLC 500 family, 1766 is MicroLogix 1400 and 2080 is Micro800. For drives, 25B is PowerFlex 525 and 22B is PowerFlex 40; in a code such as 25B-D010N114, "D" means 380–480 V, "010" is the output current rating, and N114 instead of N104 means the drive has an integrated EMC filter. Many plants in the region still run SLC 500 and older MicroLogix systems, which Rockwell has discontinued, so exact spares and migration to CompactLogix are both common requests.
Where Allen-Bradley products are used
In Oman and the GCC, Allen-Bradley controllers and drives run on oil and gas facilities, water treatment and pumping stations, cement, food and beverage and packaging plants, and on machines supplied by American OEMs. ControlLogix is often the platform for plant control systems, while PowerFlex drives are used on pumps, fans and conveyors.
Allen-Bradley products we list
| Family | Examples |
|---|---|
| ControlLogix | 1756-L85E, 1756-EN2T, 1756-EN2TR, 1756-IF16, 1756-IB32, 1756-PA75, 1756-A10 |
| CompactLogix and Micro controllers | 5069-L320ER, 5069-L340ERM, 1769-L33ER, 1769-L16ER, MicroLogix 1400, Micro820, SLC 500 (1746) |
| Distributed I/O | 1734-AENTR, 1734-IB8, 1734-IE2C, 1734-IB8S safety, 1794-AENTR, 5094-AENTR, 5069-IF8 |
| Operator terminals | PanelView Plus 7 10-inch, PanelView Plus 7 15-inch, PanelView 800, PanelView 5310 |
| Drives, motor control and networking | PowerFlex 525, PowerFlex 755, PowerFlex 4, 150-A180NBD SMC, Stratix 2000, 1783-NATR |
Ordering Allen-Bradley products: what we need
Send the full catalogue number and the series letter from the label (for example 1756-EN2T Series D), because firmware and compatibility can change between series. For drives, add the motor power, voltage and filter option. For a discontinued SLC 500 or MicroLogix part, tell us whether you need the exact spare or a migration proposal.
Facts checked against Rockwell Automation's published company history, October 2026.
Browse Allen-Bradley products by category: PLC & I/O Cards, AC Drives.
FAQ
Questions about the Allen-Bradley 25-COMM-E2P Dual-Port EtherNet/IP
Answers from our engineering team on installation, compatibility and integration.
01What is 25-COMM-E2P?
A dual-port EtherNet/IP communication adapter for PowerFlex 520-series drives.
02Does it support Device Level Ring?
Yes, the technical data says the dual-port card supports DLR topologies.
03Which manual covers it?
PowerFlex 25-COMM-E2P Dual-port EtherNet/IP Adapter User Manual, 520COM-UM003.
04Does the PowerFlex 525 need it?
Not necessarily; the 525 has one embedded EtherNet/IP port, and the card adds a second.
05Are other 25-COMM cards available?
Yes, DeviceNet (25-COMM-D), PROFIBUS (25-COMM-P) and PROFINET (25-COMM-PNET2P).
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