Loxone RGBW Tree Spots and power supplies

[Chris Moir]

Morning all, 

Got a question for you all.

Done a few panels now and installs and all going great... I've attached a photo of completed panel to give an idea of quality of installs... hopefully all ok.

Now friend has asked me to do a panel on as job they've just first fixed , however they've installed the loxone LED spots throughout... so my question is this

Obviously in auto config by putting in the quantity of 24v spots it will tell you power supplies needed however how is everyone splitting the power supplied to the spots.

A tree extension can obviously run 50 devices per channel, so say i had one channel running 50 spots ( this isn't the case, but would be maximum load) how would you supply this?

I'm presuming you would have one power supply dedicated to running mini server and extensions, and then break up power supplies to other tree devices, know but do you need to include protection (i.e, blade fuses??) etc. Or do you simply run power supplies in parallel??

Whats best practice??

Cheers

Chris

[Techdoctor]

I am using Tree spots in my current project. I have split the power supplies for the lighting. So each room will have its own power supply for lighting, so if a power supply fails its just that room that goes dark.  Coming from an LED lighting background I design bespoke LED lighting systems, I would normally work out the total wattage for a room then add 10%, this gives me the power supply wattage for the room. Since I will be putting in a false ceiling in each room the power supply can be local to the room. If you want to put all the power supplies in one location then I would add another 10% to take care of voltage drops. Also if you are using LED strips over 5m in length I would connect up both ends of the strip, this avoids one end getting dimmer. 

Remember that the power supplies for the modules need their grounds connected, but you do not need to do this for the supplies for the LED lighting,

For protection the lighting power supplies are on their own 10A circuit. 

[Andras]

On Tuesday, November 26, 2019 at 8:45:37 AM UTC+1, Chris Moir wrote:

I'm presuming you would have one power supply dedicated to running mini server and extensions, and then break up power supplies to other tree devices, know but do you need to include protection (i.e, blade fuses??) etc. Or do you simply run power supplies in parallel??

I have a dedicated power supply for the miniserver and extensions and 3 additional power supplies for powering group of LEDs through RGBW tree dimmers. The negative of all power supplies are wired to a common point, so they are on all on the same potential. 

Some power supplies support wiring them in parallel and combining them to a big redundant power supply. In this configuration though, in case one or more power supplies fail, you need to make sure, the remaining ones are not overloaded. For this purpose, power supplies often have DC OK contacts that can be used to watch their operation and program some reaction to loss of a power supply (eg: decrease the load in case it's too big).

In my setup I am not using fuses on the 24V side but certainly it would be a good idea.