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1794-AENT

Allen-Bradley 1794-AENT FLEX IO 8-Slot Ethernet Communication Adapter

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  • Manufacturer: Allen-Bradley

  • Product No.: 1794-AENT

  • Product Type: Adapter Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 179g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Product Overview

The 1794-AENT is a high-performance EtherNet/IP Communications Adapter belonging to Allen-Bradley's versatile FLEX IO product family. Designed to bridge the gap between modular plant floor I/O and industrial control networks, this adapter interfaces up to 8 standalone expansion modules with Logix-based master controllers (such as ControlLogix or CompactLogix). Supporting real-time, deterministic 10/100 Mbps data transfers, it serves as an ultra-reliable network hub for high-density distributed automation architectures.

Core Features

  • 8-Module Scanning Density: Actively manages real-time configurations and cyclic I/O mapping for up to 8 attached FLEX IO terminal bases.
  • 10/100 Mbps EtherNet/IP Link: Standard RJ45 port handles high-speed auto-negotiating communications with native messaging layer support.
  • Industrial Environmental Defense: Rugged design withstands up to 5 g of operational vibration and 30 g of sudden peak mechanical shock.
  • High-Availability MTBF: Certified with a 50,000-hour Mean Time Between Failures rating, ensuring long-term duty cycle reliability.

Technical Specifications

Parameter Data
Model / Catalog Number 1794-AENT (FLEX IO Product Line)
Network Protocol Support EtherNet/IP (Industrial Protocol)
Maximum Module Capacity Up to 8 FLEX I/O expansion modules
Physical Network Port 1 x RJ45 Category 5 copper media interface
Data Transmission Rate 10 to 100 Mbps (Auto-negotiating full/half duplex)
Input Supply Voltage Range 19.2 to 31.2 VDC (24V DC nominal)
Power / Current Consumption 7.3 W maximum power dissipation @ 19.2V / 440 mA max @ 24V DC
Thermal Heat Dissipation 24.9 BTU/hour max rating
Wire Termination Capability 0.34 to 2.5 mm² (22 to 12 AWG) solid or stranded copper lines
Module Hardware Weight 179 grams (6.31 oz) lightweight transceiver body
Operating Ambient Range 0 to 55 °C (32 to 131 °F); Storage: −40 to 85 °C
Compliance Certifications CE, UL Listed, industrial-grade hardware approvals

Engineering & Installation Guide

  • IP Addressing Mechanics: Set up the unique network identifier before commissioning by rotating the thumbwheel switches found on the front panel faceplate or utilizing a standard BOOTP/DHCP utility software loop.
  • DIN Rail Alignment Configuration: Lock the adapter module firmly on the far-left position of the TS35 mounting profile. Side-interlock subsequent terminal bases sequentially to achieve seamless electrical connection across the flex backplane lines.
  • Field Power Constraints: Run 24V DC auxiliary line inputs through the 19.2–31.2 VDC bounds. Ensure lines are terminated cleanly via 12–22 AWG twisted cable links to safeguard against localized thermal build-up at the connection nodes.
  • Ethernet Media Routing Isolation: Route the Category 5 RJ45 shielded cable paths away from variable frequency drives, heavy relay lines, or raw high-power lines to defend system frames against high-frequency electromagnetic field induction.

Technical FAQs

Q1: Can I hot-swap the 1794-AENT adapter module itself while the local expansion modules are actively processing?
A1: No. While individual I/O modules on attached terminal bases support Removal and Insertion Under Power (RIUP), disconnecting the primary 1794-AENT network adapter immediately interrupts the local backplane power loops and breaks communication links with the master scanner PLC.

Q2: What occurs if the thumbwheel switches are left positioned at a default 000 address pattern?
A2: When positioned at 000, the 1794-AENT automatically initiates a network search sequence to receive an IP lease address from an active BOOTP or DHCP server layout. If you intend to run a hard-coded static identity, configure the switches matching your desired 192.168.1.XXX field target range instead.

Q3: How do the mechanical shock and vibration specifications impact field enclosure mounting choices?
A3: Tested to withstand 5 g vibration (10–500 Hz) and 30 g operational shock, this module is specifically engineered to endure severe factory floor dynamics. This robustness allows it to be safely mounted in distributed junction panels situated directly on high-vibration machinery frames without dropping network frames.

🏷️ Tags: Adapter Module

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