C-bus lighting LED dimming

Hi

I am very new to the c-bus scene and just starting to install a system.
I am starting in our living room and have already installed some 240v GU10s and other 240v zones succesuly.
My problem is with the LEDs I want to install.
I am trying to simply fit two stips of 24v red LEDs that I want to dim!
I didnt think it would be to difficult, at the moment I am using a 4 channel and a 8 channel dimming bank and nobody can tell me what transformers I need, as soon as you mention c-bus they look at me in a strange way or just walk away!

I am also wanting to add a RGB LED system into a alcove in the other room....just looking at the complexity of trying to link the c-bus to a DMX driver is putting me off this.
Has anyone got any help or experience with the above

Thanks

 

Regarding the dimming of LEDs, you will need a LED ballast/transformer that is designed for dimming. The input to this ballast/transformer could be done with a variety of methods such as DALI, DSI, 0-10V, Phase Control or DMX. C-Bus can be interfaced using all of these methods. You'll need to consider the costs of the ballasts as well as the cost of the required C-Bus gear.

If you want to dim the LEDs using your existing C-Bus Dimmer then you'll need an LED ballast that is designed to work with phase control, but I think you'll find them to be somewhat thin on the ground.

Clipsal is/has about to/has released a C-Bus to DMX gateway that would enable you to connect a DMX LED ballast directly to this. This new product should make the cost of interfacing via DMX much more attractive compared to the ways it has been done in the past.

 

Thanks Newman

Thanks for that.
I will let you know how I get on with the dimming and will keep an eye out for the DMX gateway

Stu

 

StuDuke

The phase control C-Bus dimmer will not latch fire correctly when connected to an LED inverter driver.
Like Newman said.

I have not found one yet.

Cheers
DDirk

 

National Semiconductor make this chip, so someone somewhere must be using them.

NXP also have this.

 

Been planning to use LED's also.......... had this post bookmarked, hope it helps!
http://www.cbusforums.com/forums/showthread.php?t=4287
Also found this......
http://www.gil-lec.co.uk/products/L...+350mA+Constant+Current+LED+Driver/4053100863
and this...............
http://www.ascolights.co.uk/0-10v_Dimmable_350mA_LED_Driver_for_1-16_Fittings.html#aPLD3501_2d16

 

LED Dimming

We have the 0 ~ 10v Dimmable Ballast to suit for LED Dimming.

If you want to get more info. please feel free to contact me.

 

RGB LED system can use DMX- Cbus gateway.
but if only two strip or red LED, just use 0-10v/DALI LED transformer may be the simplest.

 

I received an e-mail yesterday about an LED downlight made by Alphalux.

What was intersting was that the brouchure had written "Dimmable leading edge driver" [brouchure is attached]

Now I cant remember id C-Bus dimmers are leading edge or trailing edge, but I think the universal should work with them.

Just putting it out there.

Mick

 

do these come with the control gear i wonder? i have been putting in possums until something comes up with leds and transformers and can use on cbus dimmer (leading edge). tried to find something more on internet about this brochure but come up with nothing. anyone seen or used these yet??

 

I have organised to get one from the local supplier to test. This should happen in about three weeks when I return from a business trip. I will report my finding then unless someone else beats me to it.

I too have possums in the roof.

Mick

 

Will it work?

Had a look at the Aurora LED Driver(constant current). But will it work with a 8ch dimmer? Heres hoping!!!

 

Halers Lighting

In New Zealand (and therefore I assume also Australia) Halers EVOLED Downlight has been released - which they state are main dimmable, with leading or trailing edge.

http://www.halers.com/fire_rated/dl_cr_f_ww_dim__evoled/24297_p.html

 

Gms intellsys

Stop hoping. It won't!

The "Dimmer" that the spec refers to (AU-DSPLED) is NOT a dimmer but a 0-10 volt source. You'll need to use a L5504AMP module plus a relay channel to control the Aurora driver.

I have this set up and whilst it dims fine, there is one other problem. The Driver seems to be full of capacitors that take a long while to discharge. The output level lags behind and slows the response to a "ramp to off" type CBus command and causes a less-than-elegant fade. On cutting the power on the relay the LED can take up to 5 secs to extinguish (depends on the number of LEDs you are driving).

On top of all that, I had one factory-bad driver that required replacing (out of a total of 4)

Also see my post - http://www.cbusforums.com/forums/showthread.php?t=5584

Phil

 

i have a 6 ch LED dimmer built and designed in New Zealand , can be controlled via RS232,

10v to 24V DC, 6A per Channel.

 

I managed to get my hands on a LED downlight made by Alphalux.
It was a 9watts high brightness beam angle 80%. According to the information it is a dimmable with leading edge dimmers. Now I am no expert on downlights , actually I hate downlights but the house I am building will look ok with them. For 9watts they are very bright and one is only required in the WC. I have trial it on a 8 channel dimmer and had no problems dimming it down from 100% to 10%. Didn't bother going any lower because there wasn't any point. So they do work and they come with LED driver(looks light a transformer)and with a 1.5meter flex and plug.
I remember reading here somewhere that if you can't buy led downlight for around them $75 to $100 they are not worth looking at. Can someone comment on this for me ?

Thanks.

 

Been a while since I've logged on here but came to ask about LED D/Lights

I got this Email from a company called superlight

"Our ECO12 LED Downlight (also attached) is the best LEd downlight currently available. It has phenomenal light output and suits standard 90mm cutouts. We also have 2 driver options that will suit CBUS, either 1-10V dimming.....or standard leading edge dimming. The ECO12 downlights are $78 ea + GST, "

The attachment he sent was just a picture of it.

I as yet haven't got back in touch with them but am keen to see what others think. I'm keen to go to LED 's but not keen on going the 0-10V way.

Derek