Allen-Bradley 1746-OA16 SLC 500 Digital AC Output Module

Product Overview

The Allen-Bradley 1746-OA16 serves as a high-density digital output solution for the SLC 500 controller platform. This module provides 16 discrete outputs to interface your PLC with AC-powered field devices such as motor starters, solenoids, and indicators. We supply this unit as 100% Brand New and Original, ensuring maximum uptime for your critical control loops and manufacturing lines.

Technical Specifications

Engineering Advantages

• High-Density Control: By packing 16 output points into a single slot, this module reduces the required rack space and lowers your total system cost.

• Robust Surge Handling: The 1746-OA16 manages surge currents up to 10 Amps. This capability protects your hardware when driving inductive loads like large AC contactors that draw high initial current.

• Simplified Wiring Logic: The module utilizes two isolated commons (8 points each). This design allows you to group different circuit types or voltage phases within the same module, increasing your wiring flexibility.

• Rapid Signal Response: With a 1 ms "On" delay, the module executes commands with high precision, essential for high-speed sorting or packaging applications.

FAQs

• Does this module require an external power supply for the outputs? Yes. While the SLC 500 backplane provides the 0.37A logic-side power, you must provide the 120/240V AC field-side power to the module terminals to drive your connected devices.

• Can the 1746-OA16 handle DC loads? No. This module utilizes Triac outputs specifically designed for AC switching. Attempting to switch DC loads will result in the output failing to "turn off" due to the lack of a zero-crossing point. Use a 1746-OB16 or 1746-OV16 for DC applications.

• Is this unit compatible with all SLC 500 chassis? The 1746-OA16 fits into any standard 1746 I/O slot. Ensure your power supply (e.g., 1746-P1 or P2) has sufficient 5V DC current capacity to support the 0.37A draw of this module alongside your other cards.

• What is the benefit of the 2 mA leakage current rating? The low 2 mA off-state leakage minimizes the risk of "ghost" signals. However, always verify that your high-impedance loads (like small LED indicators) have a minimum holding current above 10 mA to ensure they turn off completely.