The 1794-ACNR communicates data between a controller and Flex I/O modules. This Allen-Bradley adapter establishes a redundant ControlNet data highway. It sends input module data and accepts controller commands. This module enables high-availability industrial networks without a single point of failure.
Product Procurement & Buyer Guide
The 1794-ACNR features dual ControlNet BNC ports for redundant communication. It supports up to eight Flex I/O modules on a single adapter. This design allows diverse combinations of discrete and specialty modules. The module operates from a 24 VDC nominal supply with a 19.2 to 31.2V range.
It draws 400 mA maximum current and withstands 23A inrush for 2 milliseconds. The adapter dissipates a maximum of 4.6W of power thermally. Thermal dissipation stays at 15.7 BTU/hr at 19.2V DC. The FlexBus delivers up to 640 mA at 5 VDC for attached modules.
Procurement managers must verify the ControlNet protocol version V 1.25. This adapter ensures deterministic network performance at 5 Mbps data rates. It uses robust Belden RG-6/U cable for the trunk line connection. The module mounts on a standard DIN rail for quick installation.
Engineers benefit from its operational shock rating of 30 g. It also withstands 5 g of vibration from 10 to 500 Hz. The adapter requires a proper enclosure due to its open-type design. This unit measures 3.7 x 3.6 x 3.4 inches for compact panel space.
Expert Technical Evaluation & Performance Review
This adapter provides a reliable foundation for critical control system architectures. The dual-port design creates a truly redundant media pathway without signal interruption. A single 1794-ACNR manages all I/O data traffic for your local cluster.
The module must connect to an external power supply providing 19.2 to 31.2 VDC. It consumes 400 mA of current from this power source continuously. The inrush current peak reaches 23 amps for only two milliseconds. This ensures stable startup behavior without tripping protective breakers.
The component offers basic insulation type with an isolation voltage test. It undergoes a 60-second test at 860V AC for safety compliance. The ambient temperature maximum is 55 °C (131 °F) for reliable operation. Humidity levels must stay between 5 and 95% non-condensing for longevity.
Three LED indicators provide immediate visual feedback for rapid diagnostics. The I/O status, Comm A, and Comm B lights show red or green. This allows engineers to troubleshoot communication faults on the network quickly. The robust design meets IEC standards for shock and vibration endurance.
