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Allen-Bradley 20-COMM-E
by Allen-Bradley
Read verified buyer reviews ↓OverviewThe Allen-Bradley 20-COMM-E Series B Remote I/O communication module provides a vital link for integrating existing Allen-Bradley control systems, such as PLC-5 and specific SLC 500 applications, into contemporary Ethernet networks. This module acts as an essential bridge, enabling smooth data communication, remote configuration, and thorough monitoring features for your industrial infrastructure. Designed to support 10/100 Mbps Ethernet connectivity, the 20-COMM-E Series B allows these established controllers to become active participants in current network architectures, significantly extending their operational life and usability within evolving industrial settings. While Rockwell Automation recommends newer platforms like ControlLogix or CompactLogix for fresh installations, the 20-COMM-E remains crucial for maintaining and optimizing current legacy systems.Key Features Legacy System Connectivity: Connects older Allen-Bradley PLC-5 and select SLC 500 controllers to Ethernet. Ethernet Interface: Supports 10/100 Mbps Ethernet for efficient data transfer. Enhanced Communication: Facilitates data exchange, remote programming, and detailed monitoring. Series B Revision: Ensures full compatibility and dependability in industrial setups. Cost-Effective Longevity: Prolongs the operational life of existing infrastructure without costly overhauls. Industrial Reliability: Manufactured by Allen-Bradley to meet demanding industrial environments. Protocol Compatibility: Supports EtherNet/IP and various other legacy protocols. Technical Specifications Module Type: Remote I/O Communication Module Communication Interface: Ethernet Ethernet Speed: 10/100 Mbps Compatible Controllers: Allen-Bradley PLC-5, selected SLC 500 controllers Series: B Manufacturer: Allen-Bradley (Rockwell Automation) Applications Connecting existing Allen-Bradley PLC-5 and SLC 500 control systems to plant-wide Ethernet. Enabling remote programming, diagnostics, and monitoring of older industrial automation equipment. Facilitating seamless data exchange between legacy controllers and SCADA systems, HMIs, or other network devices. Upgrading communication capabilities of older production lines without full system replacement. Maintaining operational continuity and performance for critical, long-standing industrial processes. Why Choose This Model?Preserve Your InvestmentMaximize the value of your existing PLC-5 and SLC 500 hardware by integrating it into modern networks.Seamless IntegrationThe 20-COMM-E Series B provides a trusted, manufacturer-specific solution for unmatched compatibility.Reliable PerformanceBenefit from Allen-Bradley's reputation for durable and dependable industrial control components.Extended System LifeDelay expensive migrations to new platforms, allowing for budget-conscious system upgrades.Optimized for LegacySpecifically engineered to address the unique connectivity requirements of older Allen-Bradley architectures.Order NowSecure your Allen-Bradley 20-COMM-E Series B Remote I/O Ethernet Module today from Palm Parts Solution. We offer a specialized inventory of hard-to-find industrial parts and expertise in legacy systems, providing fast and reliable shipping to maintain your operations.FAQWhat is the primary function of the Allen-Bradley 20-COMM-E module?The 20-COMM-E module primarily serves to connect legacy Allen-Bradley PLC-5 and select SLC 500 controllers to modern Ethernet networks, enabling enhanced communication and remote capabilities.What Ethernet speeds does the 20-COMM-E support?This module supports 10/100 Mbps Ethernet communication.Which Allen-Bradley controllers are compatible with this module?The 20-COMM-E is compatible with Allen-Bradley PLC-5 and selected SLC 500 controllers.Why should I choose the 20-COMM-E for my legacy systems?Choosing the 20-COMM-E allows you to preserve your investment in existing PLC infrastructure, achieve seamless integration, and extend the operational life of your systems with reliable performance.
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Allen-Bradley 20-COMM-E
Overview
This is a genuine Allen-Bradley component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.
Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.
Key Features
- Genuine Allen-Bradley catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Allen-Bradley automation ecosystem
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:
- Input/output voltage and current rating
- Communication protocol and network role
- Mounting form factor and footprint
- Operating temperature, humidity, and IP rating
- Required certifications (UL, CE, ATEX, marine, etc.)
Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.
Replacement Information
Three ways to source this part through PalmPartsSolution:
- Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Allen-Bradley platform with documented conversion notes
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Module Type: Remote I/O Communication Module
- Communication Interface: Ethernet
- Ethernet Speed: 10/100 Mbps
- Compatible Controllers: Allen-Bradley PLC-5, selected SLC 500 controllers
- Series: B
- Manufacturer: Allen-Bradley (Rockwell Automation)
Applications
- Connecting existing Allen-Bradley PLC-5 and SLC 500 control systems to plant-wide Ethernet.
- Enabling remote programming, diagnostics, and monitoring of older industrial automation equipment.
- Facilitating seamless data exchange between legacy controllers and SCADA systems, HMIs, or other network devices.
- Upgrading communication capabilities of older production lines without full system replacement.
- Maintaining operational continuity and performance for critical, long-standing industrial processes.
Why Choose the 20-COMM-E?
Preserve Your Investment
Maximize the value of your existing PLC-5 and SLC 500 hardware by integrating it into modern networks.
Seamless Integration
The 20-COMM-E Series B provides a trusted, manufacturer-specific solution for unmatched compatibility.
Reliable Performance
Benefit from Allen-Bradley's reputation for durable and dependable industrial control components.
Extended System Life
Delay expensive migrations to new platforms, allowing for budget-conscious system upgrades.
Optimized for Legacy
Specifically engineered to address the unique connectivity requirements of older Allen-Bradley architectures.
Availability & Shipping
- ▸In stock: 20-COMM-E ready for immediate dispatch from our Florida warehouse.
- ▸Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
- ▸Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
- ▸Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
- ▸Buy with confidence: Every 20-COMM-E ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Allen-Bradley
Machine down? We ship parts the same day.
New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
Related Allen-Bradley resources
What Verified Buyers Say
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Independent Supplier Notice
PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.
Product Condition & Firmware
All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.