How to Control a High Current Linear Actuator Using WiFi

Introduction: How to Control a High Current Linear Actuator Using WiFi

About: Progressive Automations is your primary source for electric linear actuators, motion control systems and automation accessories. For over a decade, we have supplied various industries with top quality automati…

This Instructable will show you how to use Progressive Automations' PA-35 Wi-Fi control box to control actuators that require a large amount of current draw.

We will use the PA-17 Heavy Duty Linear Actuator as an example in this article. You can choose a control box rated to provide this much current, but what if you wanted the range and convenience of the Wi-Fi control box? The PA-35 Wi-Fi Control Box limits you to 10 Amps per channel. However, the solution to this problem is to use relays in conjunction with the control box, which allows you to control up to four actuators at any current rating, as long as the mechanical relays are rated to handle it.


  1. DPDT 20A Mechanical Relays1 x PA-35 Wi-Fi Control Box
  2. 1 x PA-17 Heavy Duty Linear Actuator
  3. 2 x
  4. 1 x PS-40-12 110-230VAC 40A Power Supply
  5. 1 x AC-15 110-240VAC 10A Power Adapter
    • Optional: You can take +12V from the PS-40-12, as long as there is sufficient current to supply the actuators and control box.

Step 1: Open Up Your WiFi Control Box

Unplug all power sources from the Wi-Fi control box before opening it up. From here, you can unscrew the 4 screws shown below.

Step 2: Access the Circuit Board

Once the cover is removed, unscrew the 3 screws to lift the circuit board.

Step 3: Partially Slide Out Your Circuit Board

Lift the side of the circuit board that is opposite of the LEDs. This is to ensure that the circuit board can slide out without bending the LEDs. Note that the circuit board does not need to be removed completely – enough space is required to have access to the connection on the side of the board.

Step 4: Reference the Wiring Diagram

Wiring Diagram of the PA-35 Wi-Fi Control of the PA-17 heavy-duty linear actuator.

Step 5: Connect Your Actuator to the Control Box

Once the circuit board is exposed, we’ve labeled the outputs in reference to the wiring diagram of the physical circuit. This wiring diagram is illustrated in Step 4. The connections on the circuit board and labels are shown here for visualization.

Step 6: Activate Your Power Supply

When all wiring is complete, power up the PS-40-12 and connect the control box with your smartphone. We have included a video that explains how you can connect your Android/iOS device to the Wi-Fi Control Box!

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