Allen-Bradley 1794-OA16 FLEX I/O 16-Point AC Digital Output Module

Product Overview

The Allen-Bradley 1794-OA16 operates as a high-density AC digital output module within the FLEX I/O 1794 platform. This module provides 16 non-isolated outputs designed to drive 120V AC loads, such as motor starters, solenoids, and indicator lights. By offloading power switching to the distributed I/O level, it reduces wiring complexity and minimizes central cabinet heat. We supply this unit as 100% Brand New and Original, ensuring your automation system operates with maximum switching reliability and zero prior service hours.

Technical Specifications

The 1794-OA16 integrates 16 solid-state AC switches into a compact rail-mounted design:

Engineering Advantages

The 1794-OA16 solves critical industrial implementation challenges through specific hardware features:

• High-Density Load Control: Managing 16 AC outputs in a single module footprint significantly reduces the physical size of the remote I/O station. This efficiency allows engineers to deploy more control points in smaller terminal boxes or narrow mounting spaces.

• Modular Terminal Base Compatibility: This module interfaces with a wide range of terminal bases, including the 1794-TBN and 1794-TB3. This compatibility allows for easy upgrades from older 8-point modules without needing to replace existing DIN rail mounting hardware.

• Enhanced Fault Troubleshooting: 16 independent yellow status LEDs provide immediate feedback on the logic state of each output. This visual diagnostic tool enables maintenance teams to distinguish between PLC logic commands and field-side electrical failures instantly.

• Robust Pilot Duty Performance: The 5A inrush rating handles the initial surge current required by heavy-duty solenoids and relay coils. This robust switching capability prevents premature module failure caused by inductive kickback or high-startup current loads.

FAQs

Does the 1794-OA16 require an external power supply?

Yes. The 1794-OA16 requires a 120V AC external power source connected to the terminal base to provide the necessary energy for the 16 output channels. The Flexbus only provides power for the module's internal logic.

What happens if I try to insert this module into the wrong terminal base?

The module utilizes a mechanical keyswitch set to Position 8. This prevents the 1794-OA16 from being fully seated or powered up in a terminal base configured for low-voltage DC modules, effectively protecting your hardware from catastrophic electrical damage.

Can I switch DC loads with the 1794-OA16?

No. This module utilizes Triac-based solid-state switching specifically for AC current. Attempting to switch DC loads will result in the output failing to turn off (latched state) or may damage the internal semiconductors. Use a DC output module like the 1794-OB16 for DC applications.

Are the outputs isolated from each other?

No. The 1794-OA16 features non-isolated outputs that share a common AC return path within the module. You must ensure all connected field devices share the same AC power reference to prevent wiring conflicts or ground loop issues.