1746-OA16 | Allen-Bradley Digital AC Output Module Supplier

Introduction to the 1746-OA16

When your SLC500 system demands reliable AC output control, the 1746-OA16 from Allen-Bradley provides a cost-effective solution. Part of the Rockwell Automation SLC500 series, this digital AC output module features sixteen outputs organized into two groups of eight. By delivering 120/240 VAC nominal output with a voltage range of 85-265 VAC, it handles general-purpose switching tasks efficiently. Choosing the 1746-OA16 means you invest in proven technology that reduces per-point costs while maintaining robust performance.

Core Specifications and Cost Benefits

• The module offers 16 outputs with a continuous current per point of 0.50 A at 30 °C and 0.25 A at 60 °C, allowing flexible load management.
• Maximum continuous current per module reaches 8.0 A at 30 °C and 4.0 A at 60 °C, supporting higher aggregate loads without oversizing.
• Backplane current draw is only 0.370 A at 5.1 Volts, minimizing power supply strain and reducing overall system energy costs.
• Output delay times of 11.0 ms (OFF to ON) and 1 ms (ON to OFF) ensure predictable switching, lowering downtime from unexpected delays.
• OFF-state leakage current is just 2 mA, preventing false triggering and saving energy in idle states.
• Load current of 10 mA guarantees reliable activation of connected devices, reducing maintenance calls.

These specs translate directly to lower total cost of ownership. For instance, the low backplane current reduces power supply requirements, while the derating curves help you optimize thermal management without overspending on cooling.

Installation and Setup Guidance

Installing the 1746-OA16 is straightforward. It occupies a single slot in any SLC500 chassis and consumes 16-bit I/O memory. The removable terminal blocks allow you to replace the module without rewiring, saving labor time. Ensure the system power supply can deliver the required 0.370 A at 5.1 Volts per module. For remote I/O configurations, verify compatibility with your processor. Always follow the manufacturer’s manual for wiring and grounding to maintain signal integrity.

Applications and Use Cases

In manufacturing lines, the 1746-OA16 controls AC solenoids, contactors, and indicator lights. Its two isolated groups let you mix voltage levels safely within the same module. For example, one group can drive 120 VAC pilot lights while the other handles 240 VAC motor starters. This grouping reduces the number of modules needed, cutting hardware costs. In packaging systems, the fast 1 ms ON-to-OFF delay improves cycle times, boosting throughput.

Maintenance and Reliability Tips

To maximize the 1746-OA16 lifespan, operate within the ambient temperature range of 32 to 140 °F. The module includes filter circuitry and optical coupling to reduce electrical noise, which minimizes false trips and extends relay life. Periodically inspect the terminal blocks for tight connections and check LED indicators for output status. Regular inspection per the manufacturer’s safety manual helps prevent unexpected failures and reduces long-term repair expenses.

Frequently Asked Questions

Q: What is the output voltage range of the 1746-OA16?

A: The module operates from 85 to 265 VAC, supporting both 120 VAC and 240 VAC nominal systems.

Q: How many outputs does the 1746-OA16 have?

A: It features sixteen outputs arranged in two groups of eight.

Q: What is the backplane current draw of the 1746-OA16?

A: The module draws 0.370 A at 5.1 Volts DC from the backplane.

Q: Can the 1746-OA16 be used with CompactLogix or ControlLogix?

A: Yes, it can be installed as remote I/O with these controllers, provided the system power supply supports the module’s current requirements.

Q: What is the off-state leakage current of the 1746-OA16?

A: The off-state leakage current is 2 mA, which prevents unintended activation of connected loads.

Product Support and Availability

The 1746-OA16 is in stock and ready to ship from Petro Auto Tech. Contact our team for pricing and lead times. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.