Allen-Bradley 1794-AENT Flex EtherNet/IP Adaptor | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1794-AENT is a dedicated EtherNet/IP network adaptor for the FLEX I/O platform, enabling high-speed Ethernet connectivity between Rockwell Automation control systems and distributed I/O nodes. This page provides full technical specifications, compatible replacement options, system compatibility data, and a structured selection guide to help engineers specify the correct adaptor for their application.
Technical Specifications
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Part Number: 1794-AENT
- Series: FLEX I/O
- Function: EtherNet/IP Network Adaptor
- Network Protocol: EtherNet/IP (CIP over Ethernet)
- Communication Speed: 10/100 Mbps, auto-negotiation
- Connector: RJ-45 (single port)
- Max I/O Modules per Bank: Up to 8 FLEX I/O modules
- Power Supply Voltage: 24V DC (from FLEX power supply)
- Operating Temperature: 0 °C to 55 °C
- Storage Temperature: −40 °C to 85 °C
- Relative Humidity: 5% to 95% (non-condensing)
- Weight: 180 g
- Certifications: UL, CE, cUL
- Mounting: DIN rail (35 mm)
- IP Rating: IP20
Compatible Replacement & Equivalent Models
When the 1794-AENT is unavailable or end-of-life, the following models may serve as functional equivalents or drop-in replacements depending on system configuration:
- 1794-AENTR – Dual-port EtherNet/IP adaptor with Device Level Ring (DLR) support; direct upgrade for redundant network topologies
- 1794-AENT/B – Revised firmware series B; functionally equivalent, check firmware compatibility with existing ControlLogix/CompactLogix projects
- 1794-ACN15 – ControlNet adaptor alternative for sites running ControlNet infrastructure instead of EtherNet/IP
- 1794-ADNX – DeviceNet adaptor; suitable for legacy DeviceNet architectures
- Third-party EtherNet/IP adaptors – Certain HMS Anybus and Molex/SST modules support FLEX I/O backplane communication; verify backplane pinout and CIP object compatibility before substitution
Note: Always verify firmware revision, EDS file version, and ControlLogix/Studio 5000 project compatibility before substituting any adaptor model.
Why Choose the Original Model
- Native Rockwell Integration: Full support in Studio 5000 Logix Designer with pre-built Add-On Profiles (AOPs) — no custom configuration required
- Proven Field Reliability: Widely deployed in automotive, food & beverage, and water treatment plants globally
- Guaranteed Backplane Compatibility: Designed and tested against the full FLEX I/O module catalog (1794-series)
- Rockwell TechConnect Support: Eligible for Rockwell Automation TechConnect support contracts
- Long-term Spare Parts Availability: Konmask.com maintains stock of both current and legacy revisions
Typical Applications
- Distributed I/O nodes on EtherNet/IP networks in ControlLogix and CompactLogix systems
- Automotive body shop and paint line automation
- Food & beverage conveyor and packaging line control
- Water and wastewater treatment SCADA integration
- Pharmaceutical batch process monitoring
- Machine tool and press control panels
- Building automation and HVAC control systems
System Compatibility
- Compatible Controllers: ControlLogix (1756), CompactLogix (1769), SoftLogix 5800
- Compatible I/O Modules: All 1794-series FLEX I/O analog, digital, and specialty modules
- Compatible Power Supplies: 1794-PS13, 1794-PS1, 1794-PS3
- Compatible Terminal Bases: 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB32, 1794-TB62
- Software: RSLogix 5000 v16+, Studio 5000 Logix Designer v21+
- Network Topology: Linear, star (requires managed switch for DLR — use 1794-AENTR for DLR)
Selection Guide
Use the following criteria to determine whether the 1794-AENT is the correct adaptor for your application:
- Network Protocol: Select 1794-AENT for EtherNet/IP; select 1794-ACN15 for ControlNet; select 1794-ADNX for DeviceNet
- Redundancy Requirement: If Device Level Ring (DLR) or dual-port redundancy is required, specify 1794-AENTR instead
- I/O Module Count: 1794-AENT supports up to 8 modules per bank; for larger banks, use multiple adaptors or migrate to point I/O (1734-series)
- Environment: For harsh environments (IP67), consider 1794-series with appropriate enclosure or migrate to ArmorFLEX (1798-series)
- Firmware Revision: Confirm EDS file and AOP version match your Studio 5000 project revision before ordering
- New vs. Replacement: For new designs, evaluate 1794-AENTR for future-proofing; for like-for-like replacement, 1794-AENT is the direct match
Quality Assurance & Sourcing
- All units sourced through verified industrial automation distributors and authorized supply chains
- Each module undergoes incoming inspection: visual check, label verification, and functional power-on test
- Serialization and firmware revision recorded at time of dispatch
- Anti-counterfeit measures: holographic labels, OEM packaging verification, and batch traceability
- Konmask.com specializes in both current-production and legacy/obsolete Rockwell Automation components
How to Order
- Part Number: 1794-AENT
- Manufacturer: Allen-Bradley / Rockwell Automation
- Add to cart directly on this page, or contact our team for volume pricing, lead time confirmation, and firmware revision requests
- Expedited shipping available for urgent MRO and production-down situations
- OEM and system integrator accounts welcome — contact us for trade pricing
Replacement & Compatibility FAQ
Q: Can I replace a 1794-AENT with a 1794-AENTR without changing my Studio 5000 project?
A: The 1794-AENTR uses a different AOP and EDS file. You will need to update your project and re-download to the controller. The backplane and I/O module wiring remain unchanged.
Q: Is the 1794-AENT compatible with CompactLogix controllers?
A: Yes. The 1794-AENT is fully compatible with CompactLogix (1769-series) controllers running RSLogix 5000 v16 or Studio 5000 v21 and above.
Q: What is the maximum number of FLEX I/O modules per 1794-AENT adaptor?
A: Up to 8 FLEX I/O modules can be connected to a single 1794-AENT adaptor on one backplane bank.
Q: Can the 1794-AENT support Device Level Ring (DLR) topology?
A: No. DLR requires the dual-port 1794-AENTR. The 1794-AENT has a single RJ-45 port and supports linear and star topologies only.
Q: Do you supply legacy firmware revisions of the 1794-AENT?
A: We maintain stock of multiple hardware/firmware revisions. Contact support@konmask.com with your project’s required revision for availability confirmation.
Q: How do I verify authenticity of the 1794-AENT I receive?
A: All units shipped by Konmask.com include OEM packaging, holographic labels, and a batch traceability record. Contact us if you have any concerns upon receipt.
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