Allen-Bradley 1794-OA16 | Flex I/O AC Digital Output Module

Overview

The Allen-Bradley 1794-OA16 is a Flex I/O AC digital output module designed for industrial automation systems. It provides 16 non-isolated output channels, capable of energizing AC loads including relay coils, solenoids, contactors, and pilot devices. The module mounts easily on DIN rails for distributed I/O applications.

Electrical Specifications

The 1794-OA16 supports an output voltage range from 74 to 132 VAC, operating at 47–63 Hz. Each output channel handles 4.0 Amperes, with a minimum on-state current of 5 mA and maximum on-state current of 500 mA per channel at 55°C. The module exhibits on-state voltage drop of 1.5 V at 0.5 A and a surge current rating of 7 A for 40 ms, repeatable every 8 seconds.

The Flexbus current is 80 mA at 5 V DC, and total power dissipation is 4.7 W at 0.5 A maximum. Thermal dissipation reaches 16.1 BTU/hr at 0.5 A maximum, ensuring controlled heat generation.

Mechanical and Environmental Features

The 1794-OA16 has dimensions of 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in) and is designed for DIN rail mounting. It operates in temperatures between 0°C to 55°C and tolerates storage temperatures of -40°C to 85°C. The module withstands vibration up to 5 g at 10–500 Hz, ensuring reliability in industrial environments.

Indicators and Wiring

The 1794-OA16 features 16 yellow status indicators for clear visual feedback of each output channel. Wire sizes are determined by the installed terminal base, enabling reliable connection to various AC loads.

Technical Specifications

Key Features

• 16 non-isolated AC output channels for energizing industrial loads.

• Compatible with multiple Flex I/O terminal bases for flexible wiring.

• Integrates with any Flex I/O communication adapter for distributed control.

• Compact DIN rail mount design enables space-efficient installation.

• Reliable operation under vibration, temperature, and shock conditions.