Allen Bradley 1794-ACNR15XT FLEX I/O XT ControlNet Adapter Module

Product Overview

The 1794-ACNR15XT serves as a ruggedized communication interface for the FLEX I/O platform, facilitating high-speed data exchange over a ControlNet network. Engineered for the "XT" (Extended Term) series, this module is specifically treated to withstand harsher environmental conditions than standard industrial components. It manages data transfers between the I/O modules on the FlexBus and the network scanner, supporting redundant media via dual BNC connectors to ensure system uptime in critical applications.

Technical Specifications

• Network Protocol: ControlNet

• Data Transfer Rate: 5 Mbps

• I/O Module Capacity: Supports up to 8 FLEX I/O modules per adapter

• Communication Ports: Dual BNC connectors (Redundant Media Support)

• Input Voltage Range: 24V DC nominal (Acceptable range: 19.2V to 31.2V DC)

• Current Requirements: 400 mA maximum at 24V DC

• FlexBus Output Current: 640 mA maximum @ 5V DC

• Isolation Rating: 50V (continuous), tested at 860V AC for 60 seconds

• Thermal Performance: -25°C to +70°C (-13°F to +158°F) operating range

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

• Humidity: 5% to 95% (non-condensing)

• Mechanical Integrity: 30 g operating shock; 5 g vibration at 10 to 500 Hz

• Physical Protection: IP20 (Open-style)

• Installation: Zinc-plated, yellow-chromate steel DIN rail or panel mounting

Operational Application

The 1794-ACNR15XT is primarily utilized in distributed control architectures where the I/O resides far from the main controller. Due to its XT rating, it is ideal for oil and gas refineries, wastewater treatment facilities, and outdoor power distribution centers where temperature fluctuations and corrosive atmospheres are prevalent. The redundant ControlNet ports allow for "Media Redundancy," meaning if one cable path is severed, the system continues to operate without interruption.