1794-AENTR FLEX I/O EtherNet/IP Dual-Port Communication Adapter | Allen-Bradley

Product Overview

The 1794-AENTR acts as a high-performance communication interface for the Allen-Bradley FLEX I/O platform. This adapter bridges the gap between a central controller and remote I/O modules via the EtherNet/IP network. It facilitates high-speed data transfer and supports flexible network topologies, making it a cornerstone for distributed control architectures. We supply this unit as 100% Brand New in original factory packaging to ensure maximum uptime and network stability for your automation facility.

Technical Specifications

The 1794-AENTR provides robust electrical and networking parameters to drive remote I/O racks:

• Communication Protocol: EtherNet/IP

• Communication Rate: 10/100 Mbps

• Number of Ports: 2 (RJ45)

• I/O Module Capacity: Supports up to 8 modules

• Input Voltage Range: 19.2–31.2 VDC (24V DC Nominal)

• Input Current: 400 mA

• Output Power (Internal Bus): 5 VDC at 640 mA

• Inrush Current: 18 Amps for 2 ms

• Isolation Voltage: 50V Continuous

• Mounting: DIN Rail

• Weight: 0.51 lbs (0.23 kg)

Engineering Advantages

• Network Redundancy with DLR: The dual RJ45 ports support Device Level Ring (DLR) topology. This prevents system-wide failure by providing a redundant data path; the network maintains communication even if a single cable segment breaks or a node fails.

• Daisy-Chain Flexibility: The integrated switch functionality allows for linear "daisy-chain" wiring. This significantly reduces the total amount of cabling required and eliminates the need for expensive managed switches at every remote drop.

• Space-Efficient Distributed I/O: The compact DIN-rail mounting style allows engineers to place I/O closer to sensors and actuators. This minimizes long-run analog signal wiring and reduces electromagnetic interference risks.

• Scalable Architecture: A single 1794-AENTR manages up to 8 FLEX I/O modules. This scalability allows for a high density of digital, analog, and specialty I/O points within a single small-footprint assembly.

FAQs

• Is this 1794-AENTR unit provided as a brand new original part?

  Yes. We supply this communication adapter exclusively as 100% Brand New original stock. Each unit arrives in its original factory packaging with intact seals to guarantee manufacturer-grade performance and reliability.

• How do I address the 1794-AENTR on my EtherNet/IP network?

  You can set the IP address using the thumbwheel switches located on the side of the module for standard private networks (192.168.1.xxx) or utilize DHCP/BOOTP software for custom network configurations.

• What is the benefit of the dual ports compared to the standard 1794-AENT?

  The "R" in 1794-AENTR stands for Redundancy/Ring. While the standard AENT has only one port, the AENTR provides two ports, enabling Device Level Ring (DLR) and linear topologies which increase network fault tolerance and simplify wiring.

• Can the 1794-AENTR power the connected I/O modules?

  The adapter provides 640 mA at 5 VDC to the internal backplane bus to power the logic side of up to 8 modules. However, you must provide separate 24V DC field power to the terminal bases to drive your actual field devices (solenoids, sensors, etc.).