Product Overview

The 1794-OA8I (1794-OA8I) is a high-density digital output module belonging to the Allen-Bradley FLEX I/O family. This module features eight individually isolated channels, allowing for the independent control of varied 120V or 240V AC loads within a single assembly. Designed for distributed I/O architectures, the 1794-OA8I eliminates the need for interposing relays in many applications by providing 250V of channel-to-channel isolation. This makes it an ideal choice for complex industrial environments where cross-talk prevention and high-voltage switching reliability are paramount.

Technical Specifications

• Catalog Number 1794-OA8I

• Output Points 8 Individually Isolated Channels

• Voltage Range 85–264V AC

• Output Type Digital Sourcing (AC)

• Current Rating 1A per channel (max)

• Frequency Support 47–63 Hz

• Isolation Voltage 250V (Continuous, channel-to-channel)

• Backplane Current 40 mA @ 5V DC

• Maximum Power Dissipation 6.4W

• Operating Temperature 0°C to +55°C

• Storage Temperature -40°C to +85°C

• Mounting DIN Rail (via Terminal Base)

• Certifications UL, CE, CSA, Class I Div 2 (Hazardous Locations)

Platform Integration & Applications

The 1794-OA8I (1794-OA8I) is optimized for modularity and space-efficiency:

• Terminal Base Requirement Must be used with a 1794-TB3, 1794-TB3S, or equivalent terminal base to facilitate field wiring.

• Status Monitoring Features individual LED indicators for each of the eight outputs, allowing for rapid visual troubleshooting.

• Distributed Control Ideal for remote I/O racks in packaging, sorting machinery, and process control systems.

• Heavy-Duty Switching Commonly used for distributed motor starters, lighting actuators, and high-voltage industrial solenoids.