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'[EE]: DSI Lighting Protocol'
2001\07\07@085007 by David Duffy

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I came across some information for dimmable lighting ballasts
yesterday. You control them via a serial interface (called DSI).
I've searched but can't find out about the physical interface of
the protocol used either. ATCO (among others?) manufacture
the ballasts - I may try them to see if they will reveal all.  :-)
Does anyone know anything about this system?
Regards...
___________________________________________
David Duffy        Audio Visual Devices P/L
U8, 9-11 Trade St, Cleveland 4163 Australia
Ph: +61 7 38210362   Fax: +61 7 38210281
New Web: http://www.audiovisualdevices.com.au
New email: spam_OUTavdTakeThisOuTspamaudiovisualdevices.com.au
___________________________________________

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2001\07\08@003100 by Michael C. Reid

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Regarding dimmable fluorescents.  They have one big advantage in that the
color or temperature does not change with dimming. You do not gain bulb life
by dimming, like you do with incandescents.  There are various types of
dimmable fluorescents.

Advance Transformer (Rosemont Illinois, USA) makes the Advance Mark X, which
connects to a normal type dimmer (dual SCR or TRIAC).  It dims down to 5%,
but in their spec sheet this is a voltage of about 60 VAC.  Below that the
tubes flicker, so you need either a control system with definable start
points or a dimmer with a trim for the low end.  They also make the Advance
Mark VII, which uses a 0-10 VDC control signal for dimming.  Many companies,
including Lutron, make various types of dimmable ballasts in either of the
above formats.

A company that has a cool line of dimmable ballasts is Energy Savings,
(Schaumburg, Illinois).  They have a line of digitally controlled ballasts
that are quite afordable, compared to the other companies in this arena.
They have an RS-485 type connection for controlling the ballasts.  The
protocol handles varying fade rates for on/off, and the dim level.  They
also make an RS-232 converter for their ballasts.  They have a number of
their own controllers but nothing elaborate.  This would be a cool PIC
project to control these ballasts.  The commercial marketplace is begging
for an afordable control system to handle these ballasts and other lighting
loads.





{Original Message removed}

2001\07\08@024829 by David Duffy

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Michael Reid wrote:
<snip>
>A company that has a cool line of dimmable ballasts is Energy Savings,
>(Schaumburg, Illinois).  They have a line of digitally controlled ballasts
>that are quite afordable, compared to the other companies in this arena.
>They have an RS-485 type connection for controlling the ballasts.  The
>protocol handles varying fade rates for on/off, and the dim level.  They
>also make an RS-232 converter for their ballasts.  They have a number of
>their own controllers but nothing elaborate.  This would be a cool PIC
>project to control these ballasts.  The commercial marketplace is begging
>for an afordable control system to handle these ballasts and other lighting
>loads.

Do you have a web address for Energy Savings? I could not find it this
afternoon.
They might have some details on the protocol & command set. I have found that
DSI & DALI use manchester encoding but not what the physical interface is yet.
I will contact ATCO tomorrow to see if they will talk about it. If anyone
else is
interested I will post the results of what I find to the list.
Regards...
___________________________________________
David Duffy        Audio Visual Devices P/L
U8, 9-11 Trade St, Cleveland 4163 Australia
Ph: +61 7 38210362   Fax: +61 7 38210281
New Web: http://www.audiovisualdevices.com.au
New email: .....avdKILLspamspam@spam@audiovisualdevices.com.au
___________________________________________

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2001\07\08@143755 by Michael C. Reid

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Energy Savings web site is still under construction.  It has been this way
for many months.  They promised at Lightfair that it would be a priority for
the coming months.  The web site is http://www.energysavingsinc.com/  I
would just call them for the protocol.


Do you have a web address for Energy Savings? I could not find it this
afternoon.
They might have some details on the protocol & command set. I have found
that
DSI & DALI use manchester encoding but not what the physical interface is
yet.
I will contact ATCO tomorrow to see if they will talk about it. If anyone
else is
interested I will post the results of what I find to the list.
Regards...
___________________________________________
David Duffy        Audio Visual Devices P/L
U8, 9-11 Trade St, Cleveland 4163 Australia
Ph: +61 7 38210362   Fax: +61 7 38210281
New Web: http://www.audiovisualdevices.com.au
New email: avdspamKILLspamaudiovisualdevices.com.au
___________________________________________

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