you can then use a constant voltage dmx driver and wire them in parallel for each group/circuit that you require. You could convert them to contant voltage, by measuring the current needed (say 700ma) and voltage required (lets say 22v) to drive that current, then add a series limiting resistor to each led fitting so that your chosen voltage (lets say 24v in this case) is sufficient to deliver the required current through the current limiting resistor (this is how the led strips work). If you try to drive each one separately then your wiring gets mighty complex and expensive. supposing each downlight needs approx 24v at 700ma, if you want to put say 4 on a circuit, you would in theory put them in series but that would reqire a dmx contant current that can deliver approx 100v at 700ma and you wont be able to find one. The problem with these is the configuration of the cob leds - they are usually constant current but already have a number of chips in series, so require quite a high drive voltage. If you have an ammeter, but it in series between the driver and the led and measure the current - it will probably be around 700ma or 350ma, but may be another odd number depending on the led configuration inside. I think the driver with your downlights would be a constant current driver - so applying 24v has just killed the led due to overcurrent.
I realize this topic is only tangentially related to Loxone: apologies if some think it not appropriate. I bought a pack of 10 so I can experiment a bit more, but would like to do so intelligently.Īnyone else done this before? Do I need to use a constant current dimmer? Other ideas of what to check?Īnd here's a link to the dmx dimmer I used: The dimmer still works as does the power supply. The spot went on much brighter but then went out and never worked again. The voltage out from the LED driver was 24v so I hooked up a 24v power supply to the dimmer.
I first tried with the normal 12v power supply hooked up to the DMX dimmer and the spot without the provided driver and it lit, but was dim. They came with a separate LED Driver and are dimmable, so I thought it would be a simple matter of removing the driver, checking the voltage, and using the same sort of dimmer as the LED strips with the correct voltage and power rating. Miniserver v12.2.12.1, 2x Ext., 2x Relay Ext., 2x Dimmer Ext., DMX Ext., 1-Wire Ext., Gira KNX Tastsensor 3 Komfort, Gira KNX Prsenzmelder, Fenster- und Trkontakte. However, I'm having a problem with the 5w COB LED Spots we wanted to use for the next room. Scenes are already included in the MS, so there is no need for such 'intelligent' components that may be complicated to program and difficult to integrate into a Loxone system. We're wanting to use DMX for all the lighting controls which works great with the RGBW & W LED strips we used so far. We're just starting our Loxone install in our reno, having finished one room.
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