FAQ's Lumento C3

What should I consider when selecting a LED strip?

 - Type of control: Constant voltage or constant current

There are two ways to control the LED strips, by constant voltage or by constant current. The difference is that LED strips which are controlled by constant voltage present SMD resistors in series with the LEDs, while LED strips which are controlled by constant current does not exhibit these resistors. The LUMENTO X3/X4 is based on constant voltage. LUMENTO C3/C4 control LED strips with constant current

- Power, current voltage and maximum permissible load

This value can be obtained by mean of our Load calculator, that you can find in this link: Load calculator for Lumento

Which LED strips voltages are Lumento C3 and C4 able to control?

Lumento C3 and C4 can only be powered with power supplies of up to, therefore this is the maximum voltage of the LED strips that Lumento C3 and C4 are able to control.

What is the maximum power that Lumento C3 and C4 are able to control?

The maximum power tolerated by Lumento C3 and C4 will depend on the LED strip characteristics. According to them, the current controlled by Lumento C3 and C4 may be: 220 mA, 300 mA, 350 mA, 500 mA, 550 mA, 630 mA, 700 mA, 750 mA, 900 mA and 1 A.

Lumento C3 and C4 must be supplied externally with a power supply of up to 30VDC maximum.  The maximum power will be delimited by the power supply and the LED current. Example: 30VDC*1A = 30 W

Can I use the additional output of my KNX power supply to supply Lumento?

No. We recommend powering them using an external power supply.

What is the maximum length of a strip of LEDs that I can connect to the Lumento X3/X4?

This value can be obtained by mean of our Load calculator, that you can find in this link: Load calculator for Lumento C3/C4

What is the maximum distance to locate a LED strip from Lumento?

There is not a maximum distance defined due to it is different depending on the installation characteristics: cable section, LED strips power supply voltage and consumption; however, we recommend to keep the minimum distance possible to avoid voltage drops along the wire.

 Can I make connections between the Lumento C3/C4 channels in order to reach a higher power at the output?

NO, under no circumstances it is possible to connect the Lumento channels in parallel or in series. 

What is the difference between RGB(W) and LED application program?

 Lumento X3/X4 RGB(W) allows a joint control of a group of 3/4 channel RGB(W), it allows both regulation of the color and the intensity. The application program is focused on this direction, with features such as predefined sequences (warm colors, cool colors, colorful covering any range) or the stability of the color (the user can choose any combination RGB(W) and adjust its intensity keeping the color chosen), among many others.

 Lumento X3/X4 LED allows a control of 3/4 strips of LEDs of one color independently. For example, it is possible to connect 3/4 strips of white LEDs and control each strip in an independent way, with its own scenes or configurations. It does not support color regulation.

 Lumento X4WHITEis designed to control up to 2 white LED modules of two channels (warm white and cool white). It allows controlling both channels separately or jointly.

What is the meaning of the parameter PWM frequency? How do we have to set this parameter?

PWM is the type of modulation that Lumento uses to dim. PWM allows to modify the intensity of light by varying the pulse duration of the power signal. The parameter PWM frequency defines the frequency of this signal and the recommended value depends on the type of application. If we are using the LEDs for decorative lighting, we can set any value as long as all the frequencies are high enough so that the human eye won’t notice the blinking. For desk lighting, we recommend the highest frequency (600 Hz) as it can prevent eyestrain; nevertheless, the default value (488 Hz) is appropriate for most applications.