The Allen-Bradley 1794-ACNR provides a robust communication bridge for your distributed automation system. This module acts as the vital interface between a ControlNet network and local Flex I/O modules. It enables deterministic data exchange for critical process control applications. The adapter’s primary function is to ensure high network availability. Its dual-port design allows for a redundant ControlNet data highway. This architecture eliminates a single point of failure in your system.
Product Procurement & Buyer Guide
Engineers require a reliable and redundant network backbone. The 1794-ACNR directly addresses this need with its dual ControlNet BNC ports. Each port operates at a data transfer speed of 5 Mbps. This ensures synchronized data flow for up to eight connected I/O modules. The module supports ControlNet protocol version 1.25. It uses standard Belden RG-6/U cable for physical connections. This makes integration into existing ControlNet infrastructures straightforward.
The adapter operates on a standard 24V DC power supply. Its input voltage range spans from 19.2 to 31.2 Volts DC. The module draws a maximum current of 400mA from this external supply. It can handle an inrush current of up to 23A for 2 milliseconds. This ensures stable startup even with capacitive loads. The Flexbus output current is rated at 640 mA maximum. This provides sufficient power for the connected I/O bank.
Physical installation is simple and space-efficient. The 1794-ACNR uses a standard DIN rail mounting method. Its dimensions are compact at 3.7 x 3.6 x 3.4 inches. The unit weighs only 0.81 lbs (0.37 kg). This lightweight design reduces physical stress on the mounting rail. The device features an open-type enclosure for thermal management. You must install it within a proper protective cabinet. This ensures compliance with safety and environmental regulations.
Technical Evaluation & Performance Review
This module demonstrates exceptional environmental ruggedness for industrial settings. It operates reliably across a wide temperature range from -20 to 55 °C (-4 to 131 °F). The non-operating storage temperature extends even further. It can withstand conditions from -40 to 85 °C. The adapter also tolerates high humidity environments. It functions correctly in non-condensing relative humidity from 5 to 95%.
Mechanical robustness is a key engineering feature of this adapter. It withstands operating shock levels of 30 g per IEC 60068-2-27 standards. The unit resists operating vibration of 5 g at frequencies from 10 to 500 Hz. This resilience ensures data integrity in high-vibration machinery areas. The non-operating shock tolerance is even higher at 50 g. This protects the module during shipping and handling.
The device provides excellent electrical isolation for signal integrity. It offers an isolation voltage of 850 Volts DC. This protects sensitive electronics from ground loops and surges. The module’s maximum power dissipation is only 4.6W at 19.2V dc. Thermal dissipation is a low 15.7 BTU/hr under the same conditions. This low heat output reduces thermal stress inside the control cabinet. Three LED indicators (Comm A, Comm B, I/O Status) provide immediate visual status. This allows for rapid troubleshooting and system diagnostics.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1794-ACNR Flex I/O ControlNet Redundant Media Adapter
- Manufacturer documentation and installation guide
- Product is shipped in an anti-static protective packaging
All orders ship via express delivery services. We use FedEx, UPS, and DHL for fast and reliable transportation.
