DALI, can C-BUS change RGB values?

Discussion in 'C-Bus Wired Hardware' started by theboyg, Dec 6, 2018.

  1. theboyg

    theboyg

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    I'm looking at some LED strips for a renovation and rather than standard dimming wondering if the C-BUS DALI module can send alternate RGB values in addition to dimming. Nothing stood out in the docs to suggest you could.

    Many thanks
     
    theboyg, Dec 6, 2018
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  2. theboyg

    Ashley

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    The Cbus Dali module simply maps Cbus group addresses to Dali addresses, so the capabilities of the system are determined by the Dali driver you are using, not Cbus. Some Dali led drivers just map the RGB leds to 3 Dali addresses so you would control them with 3 Cbus group addresses. Other Dali Led drivers will use one Dali address for brightness and a second for Color which then get mapped to 2 Cbus group addresses. There are other variations as well. What Dali drivers are you using?
     
    Ashley, Dec 6, 2018
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  3. theboyg

    theboyg

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    This would be my first foray into the DALI world, so I've yet to select a driver. It's purely for some RGB LED strips.

    So far, I'm not seeing many options for an RGB Dimmer, so I do wonder if it's worth it and just stick with a LE dimmer approach. Any recommendations for DALI RGB dimmers are welcome!


    Wonder if this is an option? https://www.amazon.co.uk/DALI-RGB-DIMMING-Controller-Type/dp/B07FDGPZFB
     
    theboyg, Dec 7, 2018
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  4. theboyg

    NickD Moderator

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    That one is a DALI Device Type 8 driver which uses new DALI commands that the current C-Bus DALI gateway doesn't support.

    You should be able to find a simpler driver that just uses 3 separate DALI addresses to control the R, G, and B channels, which you would be able to control from the C-Bus DALI Gateway.

    Something like this : https://www.inlite.com.au/products/tridonic/led-c003-dali-rgb-controller

    Nick
     
    NickD, Dec 14, 2018
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  5. theboyg

    theboyg

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    That's important info, thanks! Is there a max type number CBUS can control?
     
    theboyg, Dec 18, 2018
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  6. theboyg

    NickD Moderator

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    The C-Bus DALI gateway only supports the original DALI specified commands... back then there were no "Device Types".

    All the new device types still support the same basic DALI commands for level control, but they add new commands to control other parameters in a different way... for example a DT8 driver that controls the colour temperature of the lamp will use new commands to control the colour temperaure of the lamp, but use the same basic DALI commands to control the level (intensity) of the lamp.

    Nick
     
    NickD, Dec 19, 2018
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  7. theboyg

    theboyg

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    theboyg, Jan 8, 2019
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  8. theboyg

    NickD Moderator

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    There's not much info but it looks like the right kind of thing. You would need to assign DALI addresses to the four channels somehow... normally this would be done using a separate DALI commissioning tool (it can't be done via the C-Bus DALI Gateway)... it's possible that the buttons and display on that driver might allow you to do this but you would need to ask the supplier for more info about that.

    Nick
     
    NickD, Jan 9, 2019
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  9. theboyg

    theboyg

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    Thankyou, @NickD. Much appreciated!
     
    theboyg, Jan 9, 2019
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