Control the dimmer soft up and down time

Can the soft up and soft down rate on a L5504D2A or L5508D1A be shortened or the function just turned off (is this the same as the ramp rate or not?)

A 12 bulb chandelier with 12 x 9W energy saving L1 tubes has been connected to a L5504D2A dimmer channel(!) The chandelier has a build in feature where turning on the fitting with a ?conventional? switch turns on just 3 bulbs. Quickly turning off then on the power will turn on 6 bulbs then turning off then on again will turn on all 12 bulbs.

Dimming is not required.

I am hoping transferring the circuit to a relay is not the only option as the design has run out of relay channels.

Any help is gratefully received.

 

Min/Max

Hello opto.
You could try the Min/Max tab on the dimmer GUI and set the minimum to 99%, leave maximum at 100% - it may get you through.

Mark

 

I assume that you are referring to the soft turn-on and turn-off characteristic of the dimmer channels, where they turn on and off over apprximately 1/2 a second? If so, then this behaviour cannot be disabled. As Mr_Mark says, try setting the minimum brightness to 100% and see how you go.

The other thing to consider is that with a dimmer channel, regardless of whether it has soft-start or not, there is always a small bleed current that trickles through the EMC filter components in the output stage. This may trick the chandelier into thinking that the input has not actually turned off, even when the channel is off. The only way to know for sure would be to test it.

 

Hello,

You shouldnt use this type of fitting on a Dimmer Channel..

Your best option is to put the unit on a relay channel and write some logic to operate the fixture as intended..

Ie

When button pressed once, turns relay on.. (Turns on 3 Lamps)
When button is pressed again, turns relay off, then on again.. (Turns on 6 Lamps)
When button is pressed again, turns relay off, then on again.. (Turns on 12 lamps)
When button is pressed again, turns relay off.. (Turns all lamps off)

Cheers..

 

I had a chandelier like this with a box that switched between 2 light circuits. I found the best solutions was to remove the control box and connect each circuit to its own dimmer channel. Allows very nice light effects too with each channel dimmed to a different level, or both channels alternatively dimming up and down slowly to give a (roughly) constant light output.

 

It's really quite simple.
You can't use non dimmable Compact Fluorescents or LED's on a dimmer!
The only sensible option is to install it onto a relay channel.