---
title: "Dimming 0 / 1V - 10V"
description: "Dim third-party LED drivers with the TapHome 4AO module: 0-10 V by default or 1-10 V with a 0 V off value, plus a relay to cut driver power at 0 %."
url: "https://taphome.com/en/docs/functional-areas/lighting/dimming-0-10v/"
language: en
lastmod: 2025-11-21
generator: hugo
ai:
  topics: ["dimming","0-10v-control","analog-output","led-driver","power-saving","smart-rules"]
  questions: ["How do I configure 0-10V dimming with TapHome 4AO module?","What is the difference between 0-10V and 0/1V-10V dimming modes?","How to enable the Off value setting for LED dimmers that use 1V-10V range?","How to automatically turn off power supply when all dimmable lights are off?","Where do I find the min and max value settings for analog output dimmer?","How to use Equation Smart Rule to extend power supply lifespan?"]
---

# Dimming 0 / 1V - 10V

Using PWM converter to output voltage signal 0-10V

Last updated: 2025-11-21

You can use the 4AO module for dimming using an external third-party LED driver/LED dimmer module.

## 0-10 V

This is the default option where 0V = 0% = off, 10V = 100% = on

1. Open Service Settings of the analog output device
2. Find the **Values** section.
3. Default setting is:

| ← AO Dimmer | |
|-------------|---------|
| **Min value** | 0V |
| **Max value** | 10V |
| **Use other value when output is turned off** | ✗ |
| **Off value** | 0V |

## 0/1 V - 10 V

Some dimmers require 0V when the light is off, and to start dimming, they use the range 1V - 10V.

1. Open Service Settings of the analog output device
2. Find the **Values** section.
3. Change the setting according to the following table:

| ← AO Dimmer | |
|-------------|---------|
| **Min value** | 1V |
| **Max value** | 10V |
| **Use other value when output is turned off** | ✓ |
| **Off value** | 0V |

## Combining Analog Output with Relay (Optional)

If you want to save energy, you may want to turn off the power supply when all lights powered by it are set to 0%. This way, more energy is saved when lights are off.

To extend the power supply's lifespan, you should use a Smart Rule to turn off the power after all lights have been off for a certain period:

1. Open the switch that controls the power supply
2. Add a Smart Rule: **Equation**

| ← Equation | |
|-----------|---------|
| **Variables**<br><br>Dimmer 1<br>Dimmer 2<br>Light 24 V | <br>Le = 0.20<br>Le1 = 0<br>St = 1 (On) |
| **Equation**<br><br>(Le = 0) AND (Le1 = 0) AND NOT St<br>alternative: (Le = 0) AND (Le1 = 0) AND (St = 0) | |
| **Actions**<br><br>**If result is TRUE, perform following actions:**<br><br>Power Supply | <br><br>**Off** |
| **If result is FALSE, perform following actions:**<br><br>Power Supply | <br><br>**On** |
| **Duration**<br><br>When to stop executing specified actions<br><br>**Minimum duration**<br>Value: 5 minutes<br><br>**Maximum duration**<br>Value: **Off** | <br><br><br>**True**<br><br><br><br>**False** |

**See also** — [PWM converter for a 0–10 V output signal](https://taphome.com/en/docs/wiring/pwm-converter/), [PWM Dimming (CV)](https://taphome.com/en/docs/functional-areas/lighting/dimming-cv/).