1746 OA16 Wiring Diagram: A Comprehensive Guide

If you’re looking to set up an Allen-Bradley 1746 OA16 module for your industrial application, proper wiring is of the utmost importance. In this article, we’ll provide you with a thorough guide to the 1746 OA16 wiring diagram. We’ll cover everything from the basics of the module to the specifics of the wiring process, along with some frequently asked questions.

What is the 1746 OA16 module?

The 1746 OA16 module is a digital ac output module produced by Allen-Bradley, a leading provider of industrial automation solutions. It’s a member of the SLC 500 family of programmable controllers, which are widely used in manufacturing, processing, and other industrial applications.

The 1746 OA16 module is designed to interface with a programmable controller and provide on/off control to devices such as motors, valves, and solenoids. It contains 16 output channels, each capable of switching up to 240V AC/DC and 2A of current.

1746 OA16 module specification

Before we move on to the wiring diagram, let’s take a quick look at the specifications of the 1746 OA16 module:

Specification Value
Brand Allen-Bradley
Series SLC 500
Module Type Digital AC Output Module
Channels 16
Supply Voltage Range 85-132V AC, 170-265V AC
Output Voltage Range 0-240V AC/DC
Output Current Range 2A/channel, 8A/module

How to wire the 1746 OA16 module

Step 1: Power up the module

The first step in wiring the 1746 OA16 module is to power it up. Before you do this, make sure that the power supply to the module is turned off. Once you’ve done this, connect the 24V DC power supply to the module’s power connector. The positive terminal of the power supply should be connected to the V+ terminal of the module, while the negative terminal should be connected to the V- terminal.

Step 2: Connect the ground

The next step is to ground the module. This is important for safety reasons, as it helps prevent electrical shock. Connect the ground wire to the grounding terminal of the module.

Step 3: Connect the output load

Once you’ve powered up and grounded the module, it’s time to connect the output load. This is the device that you want to control using the module’s on/off signals. Connect the output load to the appropriate output channel on the module’s terminal block.

Make sure that the load is rated for the voltage and current that it will receive from the module. If you’re unsure about the load’s rating, consult the manufacturer’s specifications or seek the advice of a qualified technician.

Step 4: Complete the wiring

Finally, complete the wiring by connecting the input signals to the module. These signals come from the programmable controller and tell the module when to turn the output load on or off.

Connect the input signals to the appropriate input channels on the module’s terminal block. Make sure that you follow the proper wiring conventions, which may vary depending on the type of controller and the specific application.

FAQ about 1746 OA16 wiring diagram

Q: How do I know which output channel to use?

A: The output channels on the 1746 OA16 module are numbered from 0 to 15. The channel number corresponds to the position of the channel on the module’s terminal block. As a general rule, it’s best to use the lowest-numbered available channel for your output load.

Q: How do I test the wiring after installation?

A: The easiest way to test the wiring of a 1746 OA16 module is to use a multimeter. Set the multimeter to the voltage or resistance setting and measure the voltage or resistance across the output terminals of the module. If the readings are as expected, the wiring is likely correct.

Q: Can I use the 1746 OA16 in a hazardous environment?

A: The 1746 OA16 module is not rated for hazardous environments, such as those with explosive gases or dust. If you need to use the module in such an environment, you’ll need to take additional precautions, such as using intrinsically safe wiring and enclosures.

Q: Can I use the 1746 OA16 to control a DC load?

A: Yes, the 1746 OA16 can be used to control both AC and DC loads, as long as they are rated within the module’s specifications.


Proper wiring is essential for the safe and effective use of the 1746 OA16 module. By following the steps outlined in this guide and consulting the module’s specifications, you can ensure that your installation is up to code and functioning as intended.