Allen Bradley 1794-ACNR15 Flex I/O ControlNet Redundant Adapter Module

Product Introduction

The Allen-Bradley 1794-ACNR15 Flex I/O ControlNet Redundant Adapter Module is a high-reliability communication interface designed for distributed I/O systems requiring redundant network connections. Part of the Flex I/O ControlNet family, it allows Flex I/O modules to be connected to dual ControlNet networks, ensuring continuous operation even if one network fails.

This adapter features two ControlNet BNC ports and supports ControlNet protocol version 1.5 at a network speed of 5 Mbps. It integrates a 24 VDC power supply to feed the FlexBus backplane, delivering up to 640 mA to connected modules. With an input voltage range of 19.2–31.2 VDC, a maximum current draw of 450 mA, and inrush current of 23 A for 2 ms, the module is built for stable operation in industrial environments. The IP20 open-style construction and DIN rail mounting simplify installation in standard control panels.

The 1794-ACNR15 is ideal for applications where network redundancy, reliability, and continuous uptime are critical, providing both protection and high-speed communication for Flex I/O systems.

Product Specifications

Applications

• Redundant network control – Ensures continuous communication in critical industrial processes

• Distributed I/O systems – Connects Flex I/O modules to dual ControlNet networks for reliability

• Process and factory automation – Supports machinery requiring high uptime and fault tolerance

• OEM and machine-building applications – Enables scalable, reliable distributed control architectures

• Remote diagnostics and monitoring – Provides real-time monitoring of I/O modules over redundant ControlNet networks

Advantages

• Redundant ControlNet ports – Ensures high system reliability and continuous operation in case of network failure

• High-speed communication – 5 Mbps network rate enables fast and reliable data transfer

• Integrated FlexBus power supply – Powers up to 8 Flex I/O modules with 640 mA output

• Electrical isolation – 850 VDC isolation protects the network and connected I/O

• Compact DIN rail design – Simplifies installation in panels and enclosures

• Wide operating temperature – Functions in environments from -20 to 55 °C

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