The Allen-Bradley 1794-ACNR15 is a critical component for high-availability industrial networks. This redundant media adapter ensures your ControlNet data highway maintains continuous operation. Engineers rely on this module to prevent costly production downtime. The 1794-ACNR15 automatically reroutes data if the primary trunk fails. This feature provides true network resilience for your distributed I/O system. It supports up to eight Flex I/O modules in any combination. You gain flexibility for diverse application requirements without sacrificing performance.
Product Procurement & Buyer Guide
Why Choose the 1794-ACNR15 for Redundant Networks?
Your production line cannot tolerate unexpected communication failures. The Allen-Bradley 1794-ACNR15 solves this problem with dual ControlNet ports. Each port connects to an independent trunk cable for true redundancy. If one trunk experiences a fault, the module instantly switches data flow. This automatic failover maintains seamless control between your controller and I/O. You protect critical processes from single points of network failure. The module supports a ControlNet transmission speed of 5 Mbps. This rate ensures fast data exchange for time-sensitive applications.
Selecting the Correct Power Supply and Wiring
This adapter requires an external 24V DC power supply for operation. The acceptable input voltage range is 19.2 to 31.2V DC. You must provide a supply capable of delivering 400 mA minimum. Use solid or stranded copper wire for all power connections. The wire gauge should be 22 to 12 AWG with a 75°C insulation rating. For double wire connections, use 22 to 16 AWG wire without intermixing sizes. The maximum insulation thickness is 1.2 mm for proper terminal fit. Following these specifications ensures reliable power delivery and safety.
Mechanical Mounting and Environmental Considerations
The module mounts easily on a standard DIN rail for quick installation. You can also wall-mount the device for specific cabinet layouts. The required torque for mounting screws is 7 pound-inches. The module dimensions are 87 x 94 x 69 millimeters with a weight of 220 grams. This compact size fits well in crowded control panels. The operating temperature range is -25 to 55 degrees Celsius. It operates in 5 to 95% non-condensing relative humidity. The module withstands operational shock up to 30G and vibration of 5G. These ratings ensure performance in harsh industrial environments.
Understanding Communication and Status Indicators
The adapter features two BNC ports for ControlNet trunk connections. Each port communicates at a rate of 5 Mbps using ControlNet protocol version 1.25. Three LED indicators provide crucial diagnostic information. Comm A and Comm B show the status of each ControlNet port. The I/O status LED indicates the health of connected Flex I/O modules. Use these indicators for quick troubleshooting during commissioning and operation. They help you identify network issues without complex diagnostic tools.
Technical Specifications Overview for Procurement
The module has a maximum power dissipation of 3.4W at 19.2V DC. It draws a maximum current of 450 mA from the external supply. The Flexbus output current is 640 mA maximum for powering I/O modules. The isolation voltage is 850V DC for robust electrical protection. The inrush current reaches 23A for 2ms during startup. These specs help you calculate your system's total power budget accurately. The module carries a T4 temperature code for thermal management.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1794-ACNR15 Redundant ControlNet Adapter Module
- Manufacturer: Rockwell Automation / Allen-Bradley
- Product Line: Flex I/O 1794 Series
- Part Number: 1794-ACNR15
- UPC: 10612598180599
- Weight: 0.56 lbs (0.26 kg)
- We offer express delivery shipping via FedEx, UPS, and DHL.
