Using the RGBW module with a current to voltage converter?

[marcfonteijn 4]

I'm trying to control a buva ventilation system that can be driven with a 0-10v connection. As the 0-10v regulator unfortunately isn't available anymore on Robbshop website I had to find a different solution. For what I understand the RGBW output channels on the Fibaro module are current regulated (4-20ma?) so I got this current to 0-10 voltage converter from aliexpress (

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).

 

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I've attached the "current input" on the converter to the "red" channel on the Fibaro module. I didn't connect the "current output" to anything. And of course both the Fibaro module and the converter are connected to a 12v 1a power supply. The Fibaro module is brand new and the settings are factory default.

 

Now to test the setup I'm messuring the voltage output on the converter with multimeter (+ connected to voltage output and - to ground). I would expect that when I change the "red" value on the Fibaro module the voltage output would change. But that is not the case. The voltage stays at a fixed value.

 

So right now I'm stuck. Was my assumtion that about the Fibaro module being current regulated wrong? Did I make a mistake in my wiring? Or should I messure something else with the multimeter? 

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[petergebruers 1,268]

I'm pretty sure that the output of the RGBW is PWM, not 4-20mA.

I use this module to convert the signal from RGBW to 0-10 V:

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"0-10V PWM Digital to Analog Signal Tranformer Converter Module MACH3 PLC"

PWM digital signals into analog signals from 0 to 10V.

Convert PWM digital signal into 0 to 10 v analog signals.

Power Input Range: 12V-30V (Power requirements: more than 100MA) (With 12 V supply max out is about 9 V, not 10)

Signal interface switch can be used for PLC or other industrial control board.

PWM Reception frequency range: 1 KHZ - 3 KHZ.

Current output capacity: 10MA.

Resolution: 0.1V.

Usage: by adjusting the potentiometer board, can match the calibration of PWM signals of different frequency pulse

PWM signal input level range:

4.5V to 10V peak to peak level, jumper inserted at 5V. This type signal mainly for conventional industrial control card (such as MACH3 board), for 5V the CPU interface.

12 to 24V peak to peak level, jumper inserted at 24V. This type signal mainly for conventional PLC interface

[marcfonteijn 4]

I'm pretty sure that the output of the RGBW is PWM, not 4-20mA.

 

Thanks and I think you're right. I'll order that module, it's also

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for those interested.

Edited September 22, 2016 by marcfon

[petergebruers 1,268]

Thanks for the feedback! And I'm always interested in links on aliexpress.

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[marcfonteijn 4]

Thanks for the feedback! And I'm always interested in links on aliexpress.

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Would be really great if this works for controlling the ventilation system! My system has a build in 12v power supply so it's super easy to attach the rgbw module + converter. 

 

Are you using the 5v or 24v setting on the PWM converter?

[petergebruers 1,268]

I use the 24 V position. I'd use the 5 V if I had to connect it to an Arduino.

[PreHack 8]

I got some qubino flush dimmer 0-10v they work very well for my home lightning

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Its not perfect it needs 12/24 vdc power supply and does not have a relay.

[marcfonteijn 4]

Since it has become so

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I'll first try to get this working with an Wemos D1 mini (+ buck converter) instead of the fibaro rgbw module. The ESP8266 has PWM on it's output pins so that should work. The only thing I'm not sure about is if the PWM converter board will work with 3.3V PWM input out of the box. If not then you'll need an additional logic level shifter. 

 

The nice thing of the ESP8266 setup (with all it's parts) is that it's 1/5 of the price of the rgbw module.