1794-ACN | Allen-Bradley ControlNet Adapter - Petro Auto Tech

Product Overview

The 1794-ACN is a ControlNet Adapter from Allen-Bradley, part of the Flex I/O 1794 product line. It interfaces FLEX I/O modules to I/O scanner ports over ControlNet networks, enabling high-speed and repeatable data delivery between I/O devices and controllers. This adapter is designed for demanding industrial automation environments requiring robust and deterministic communication.

Technical Specifications Analysis

The 1794-ACN operates with a 24V DC voltage and an input voltage range of 19.2-31.2V DC. It provides an isolation voltage of 850V DC, ensuring reliable performance in electrically noisy settings. The adapter consumes a maximum of 400mA from an external 24V supply and dissipates up to 4.6W at 19.2V DC. Its FlexBus output current is 640 mA max. at 5V DC, supporting up to 8 I/O modules. The communication rate is 5M Bits, and it uses Belden RG-6/U ControlNet cable. The unit weighs 0.44 lbs (0.20 kg).

Application Scenarios & Usage Methods

In discrete manufacturing, the 1794-ACN connects sensors and actuators to a ControlNet backbone, enabling real-time control of assembly lines. For process industries, it links analog I/O modules for monitoring temperature, pressure, and flow. Users can configure the adapter to handle up to 64 analog input points or 256 digital I/O points. The adapter’s 5M Bits communication rate supports high-speed data transfer, making it suitable for applications requiring synchronized control.

Installation Guide & Packing List

Mount the 1794-ACN on a DIN rail, panel, or wall using the provided hardware. Ensure the input voltage is within 19.2-31.2V DC and use Protected Extra Low Voltage (PELV) or Safety Extra Low Voltage (SELV) to comply with CE directives. Connect the ControlNet cable (Belden RG-6/U) to the adapter’s BNC connector. The package includes the 1794-ACN adapter and mounting instructions.

Purchasing Advice

When selecting the 1794-ACN, verify that your system requires a ControlNet adapter with 24V DC input and 850V DC isolation. This model supports up to 8 I/O modules, making it ideal for medium-scale distributed I/O applications. For reliable sourcing, Petro Auto Tech offers genuine Allen-Bradley parts with fast delivery.

Repair & Maintenance Tips

Regularly inspect the adapter for dust accumulation and clean with dry compressed air. Check all cable connections for tightness and signs of wear. Store the unit in a dry, static-free environment when not in use. Avoid exposing the adapter to moisture or extreme temperatures beyond its specified input voltage range.

Frequently Asked Questions (FAQs)

Q: What is the input voltage range for the 1794-ACN?

A: The input voltage range is 19.2-31.2V DC.

Q: How many I/O modules can the 1794-ACN support?

A: It supports up to 8 I/O modules.

Q: What is the communication rate of the 1794-ACN?

A: The communication rate is 5M Bits per second.

Q: What type of cable is required for ControlNet connection?

A: It requires Belden RG-6/U ControlNet cable.

Q: What is the isolation voltage of the 1794-ACN?

A: The isolation voltage is 850V DC.