Buy now: Allen-Bradley 1756-OA16 ControlLogix AC Output Module
Atlantechdrives provides you the 1756-OA16, a robust and reliable 16-point discrete AC output module for the ControlLogix system. This module is the industry standard for controlling high-voltage AC loads such as motor starters, solenoids, and indicators, providing a high density of control in a single-slot form factor.
- Outputs: 16 Points (8 points per group)
- Voltage Range: 74V to 265V AC
- Current Rating: 0.5A per point @ 60°C
- Isolation: Group-to-group isolation
- Backplane Current: 250mA @ 5.1V
Technical Performance: Reliable AC Switching
The 1756-OA16 is designed to handle the rigors of industrial power switching. It utilizes triac outputs to provide silent, spark-free switching of alternating current. The module features 16 individual LEDs on the front panel that provide immediate visual confirmation of the status of each output, which is invaluable for field diagnostics. It supports «Configurable States» in the event of a controller failure, allowing you to define whether each output should turn OFF, turn ON, or HOLD its last state, ensuring the safety of your process during network interruptions.
Installation Advice: Wiring and Surge Protection
When wiring the 1756-OA16, use a 1756-TBNH or 1756-TBSH Removable Terminal Block (RTB). It is crucial to remember that this module has two isolated groups of 8 outputs. Each group can be powered by a different AC phase or voltage source if required. To extend the life of the internal triacs, we highly recommend installing external surge suppressors (RC networks) across inductive loads like large solenoids or relay coils. This prevents voltage spikes from «leaking» through the triac and causing unexpected behavior or hardware failure.
Maintenance and Diagnostic Features
The 1756-OA16 is built for long-term service in harsh environments. To maintain the module, ensure that the peak current across all 16 points does not exceed the total chassis power supply rating. The module includes internal electronic fusing for each group to protect against short circuits. If an output group fails, check the «Module Info» tab in Studio 5000 for diagnostic faults. Periodically verifying that the terminal block screws are torqued correctly will prevent arcing and heat buildup at the connection points.
FAQs
Q: Does the 1756-OA16 support fused outputs?
A: Yes, it has internal electronic fusing per group, but external fusing is recommended for individual point protection.
Q: Can I mix 120V and 240V on the same module?
A: Yes, but only if they are in different isolated groups (Group 0 and Group 1).
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