Allen-Bradley | 1794-ACN15 | FLEX I/O ControlNet Communication Adapter

Overview

The Allen-Bradley 1794-ACN15 is a ControlNet communication adapter module for the FLEX I/O system, designed to integrate distributed I/O devices into a ControlNet network. It provides a robust and deterministic network connection with a high data transfer rate of 5 Mbps, enabling real-time communication between controllers and field devices. Compact and durable, this adapter supports up to eight FLEX I/O modules, making it an ideal choice for modular control architectures in demanding automation environments.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model / Catalog Number: 1794-ACN15

• Product Line: FLEX I/O

• Product Type: ControlNet Communication Adapter

• Network Type: ControlNet

• I/O Module Capacity: 8 modules

• Communication Rate: 5 Mbps

• Nominal Supply Voltage: 24V DC

• Operating Voltage Range: 19.2…31.2V DC (with 5% AC ripple tolerance)

• Power Consumption: 7.9 W @ 24V DC

• Power Dissipation (max): 4.6 W @ 19.2V DC

• Thermal Dissipation: 15.7 BTU/hr @ 19.2V DC

• Inrush Current: 23 A for 2 ms @ 24V DC

• 24V Power Supply Input Load: 330 mA

• 24V Power Supply Output (max): 450 mA

• Isolation Voltage: 850V DC for 1 second (user power to system)

• Compatible Cables:

• 1786-RG6 (standard PVC CM-CL2)

• 1786-RG6F/A (high-flex version)

• Communication Connectors: BNC coaxial connectors (ControlNet standard)

• Mounting: DIN rail

• Dimensions (L × W × H): 9.2 × 9.4 × 8.8 cm (3.6 × 3.7 × 3.5 in.)

• Weight: 0.25 kg (0.55 lbs)

• Operating Temperature: 0°C to +55°C (32°F to +131°F)

• Storage Temperature: -40°C to +85°C (-40°F to +185°F)

• Humidity: 5–95% non-condensing

Key Features

• Enables fast and deterministic ControlNet communication for FLEX I/O systems

• Supports up to eight I/O modules for flexible system configuration

• Compact design with DIN-rail mounting for efficient installation

• Isolated power circuits ensure reliable and safe operation

• Compatible with standard and high-flex ControlNet cables for versatile wiring options

Application Scenarios

• Distributed I/O control in manufacturing lines and process automation

• Machine control networks requiring synchronized communication

• Integration of FLEX I/O with ControlLogix or CompactLogix controllers

• Real-time monitoring and feedback in high-speed automation environments

FAQs

Q1: How many I/O modules can the 1794-ACN15 support?
It supports up to 8 FLEX I/O modules on a single adapter.

Q2: What is the network speed of the 1794-ACN15?
The adapter operates at 5 Mbps, offering high-speed deterministic ControlNet communication.

Q3: Is this module compatible with all FLEX I/O series?
Yes, it is compatible with standard Allen-Bradley 1794 FLEX I/O modules and ControlNet-based configurations.