Let's be honest: when you search for a 'mean well power supply wiring diagram' or 'mean well led driver wiring diagram,' you're not looking for theory. You're staring at a terminal block with 5 or 6 screws and thinking, which wire goes where?

I've been there. Not just once—over the past 6 years of tracking every invoice and spec sheet, I've had to answer this question across three different lighting projects. And here's the thing: there's no single wiring diagram that covers every scenario. That's why you're getting four different ones. Let's walk through them.

The 4 Wiring Scenarios (Pick Yours)

I'm going to start by categorizing your situation into one of these buckets. Read the descriptions and jump to the one that fits:

  • Scenario 1: Basic power supply, no dimming – You just need AC in, DC out for your LED strip or fixture. No fancy controls.
  • Scenario 2: Dimmable LED driver with 3-in-1 dimming – You're using Mean Well's 3-in-1 dimming (resistor/PWM/voltage) and need to wire that correctly.
  • Scenario 3: Dimmer switch + non-dimmable power supply – You want to dim, but your driver isn't dimmable.
  • Scenario 4: Adding a Zigbee controller – You want wireless lighting control for your chandelier candles or strips.

If you're unsure which one applies, don't worry—I'll give you a quick test at the end.

Scenario 1: Basic Power Supply, No Dimming

This is the simplest scenario and also the most common for general-purpose Mean Well supplies like the LRS-150-24 or HDR-60-24.

From the outside, wiring a power supply looks straightforward: connect AC to the input, DC to the load. The reality is that missing the grounding connection or mis-wiring the AC neutral/line is the #1 cause of first-boot failures in small shops. Ask me how I know.

Most buyers focus on the DC output voltage and completely miss the fact that the AC input terminals are often labeled differently between models. The question everyone asks is 'what's my output voltage?' The question they should ask is 'does my power supply terminal accept 110V or 220V natively?' Many Mean Well supplies are universal input (85-264VAC), but some are not—check the label.

Here's the wiring map for a standard Mean Well single-output power supply (LRS series as example):

  1. Terminals L and N: Connect your AC mains (Line/Live to L, Neutral to N). Use 14-18AWG wire.
  2. Terminal FG (sometimes marked PE or Earth): Ground your chassis. This is not optional for LED lighting in commercial installations.
  3. Terminals +V and –V (or COM): Connect your LED strip or fixture. Observe polarity: + to red (or +) wire, – to black (or –) wire.

That's it. Simple. If you're just powering non-dimmable LEDs or standard lighting, you can stop here. But if you need dimming, read on.

Scenario 2: Dimmable LED Driver with 3-in-1 Dimming

The Mean Well LPC-60-700 or HLG series with 3-in-1 dimming is where wiring gets interesting. These drivers have an extra set of terminals: typically DIM+ and DIM– (sometimes labeled separately).

Here's the part that surprised me the first time: the 3-in-1 dimming circuit supports three methods—resistor, PWM, and voltage control—but the wiring is different for each. Using the wrong method can blow the dimming circuit or cause flickering. In Q2 2024, when we switched vendors for a dimmable LED strip project, I had to redo the wiring three times because we used a resistor when the driver expected a PWM signal.

Let me break down the three methods:

Method A: Resistor Dimming

Connect a potentiometer (typically 10kΩ or 100kΩ—check datasheet) between DIM+ and DIM–. The driver varies the output current based on resistance. Note to self: This works well for single-zone dimming, but doesn't support lighting control systems.

Method B: PWM Dimming

Supply a PWM signal (0-10V or 0-100% duty cycle) to DIM+ (positive) and DIM– (negative). The driver's output current is proportional to the PWM duty cycle. This is my go-to for most projects because it works with standard lighting controllers.

Method C: 0-10V Dimming

Connect a 0-10V dimmer to DIM+ (positive) and DIM– (negative). The driver responds linearly to voltage. Most commercial dimmers work this way.

The numbers said go with resistor dimming—cheapest and simplest. My gut said stick with 0-10V because our lighting controller supports it. Went with my gut. Later learned the resistor method would have required a separate fader box we didn't budget for. That's a hidden cost most buyers miss.

Scenario 3: Dimmer Switch + Non-Dimmable Power Supply

Let me be blunt: you cannot wire a standard wall dimmer switch directly to a non-dimmable Mean Well power supply and expect it to work. The power supply will either shut down, hum, or get damaged. That 'cheap' option without a dimmable driver will result in a $1,200 redo when the quality fails and you have to swap everything out.

From the outside, it looks like you can just cut a dimmer into the AC line. The reality is that non-dimmable power supplies have no dimming control circuitry—the output regulation is fixed. The only way to dim with a non-dimmable supply is to use a separate dimming controller on the output side (between the supply and the LEDs), but that adds cost and complexity.

My advice: If you need dimming, buy a dimmable driver from the start. The $15–20 premium per driver beats the $200 in labor and replacement parts later. I built a cost calculator after getting burned on this twice.

Scenario 4: Adding a Zigbee Controller for Chandelier Candles

Wireless controls like Zigbee are great for chandelier candles or any decorative lighting where you want app control or voice commands. But you still need a compatible LED driver or power supply.

The common setup is: AC mains → Power Supply (e.g., LPC-60-700) → Zigbee Controller → LED load. The Zigbee controller sits between the DC output of the power supply and your chandelier candles. You're no longer dimming via the power supply's terminals; you're dimming via the controller.

Here's what I learned the hard way: not all Zigbee controllers work with constant current (CC) LED drivers. Most Zigbee controllers expect a constant voltage (CV) input (like 12V or 24V). If you use a constant current driver like the LPC-60-700, you'll need to set the output voltage to within the controller's range—or better, use a constant voltage supply (like the LRS-150-24) for the controller and then add CC drivers per LED string.

The surprise wasn't the wiring complexity. It was the cost: the Zigbee controller added $25–40 per fixture (unfortunately). But the flexibility was worth it for our museum-grade chandelier project.

How to Know Which Scenario Is Yours

Still unsure? Answer these three questions:

  1. Do you have a dimmable LED driver (like LPC or HLG series)? If yes → Scenario 2. If no → Scenario 1.
  2. Do you need wireless control (Zigbee, Wi-Fi, etc.)? If yes → Scenario 4. If no, read on.
  3. Are you planning to use a standard wall dimmer on a non-dimmable supply? If yes → stop. Go back to Scenario 3 and reconsider your hardware selection.

If none of these fit exactly, you're likely in Scenario 1—a basic install. Just get the wiring right and move on.

One final thought: the difference between a successful install and a costly redo often comes down to one question: did you check the datasheet? Every Mean Well model has a documented wiring diagram. I keep a binder of printouts (old school, I know) for our most-used models. It's saved me more than once. And if you're nervous about wiring, don't be—just take it terminal by terminal. You'll get it right.