Excellent PLC
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
| Parameter | Description |
|---|---|
| Product Name | Flex I/O ControlNet Redundant Adapter Module |
| Model Number | 1794-ACNR15 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Network | ControlNet |
| Network Speed | 5 Mbps |
| ControlNet Protocol Version | 1.5 |
| Ports | Two ControlNet BNC ports |
| Mounting Type | DIN Rail |
| Enclosure Rating | IP20, open style |
| Power Supply | 24 VDC |
| Input Voltage Range | 19.2–31.2 VDC |
| Current Draw | 450 mA max |
| FlexBus Output Current | 640 mA max |
| Isolation Voltage | 850 VDC |
| Inrush Current | 23 A for 2 ms |
| Operating Temperature | -20 to 55 °C (-4 to 131 °F) |
| Dimensions | 94 x 87.4 x 92 mm |
| Weight | 0.22 kg |
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
