0-10 Volt dimmers

[mm08822]

Two questions:

1) I am looking for a toggle style dimmer with 0-10 volt dimming function. All I can find are slider and rocker style. Anyone know of a toggle style?

2) I saw a dimmer spec that stated: 28mA maximum sink current. What does a typical fixture's 0-10 volt dimming input draw? (This is not the line voltage draw.)

Thx

 

[cybrdyke]

I dont know of a toggle style dimmer.
As for the driver, I'd say that there's nothing "typical" in LED fixtures, but to try to answer your question....
The driver outputs (not input draw) a tiny amount of current, usually in micro-amps. The ones that I'm familiar with are in the 150 to 200 uA. Your dimmer needs to be able to sink the sum of the current from all of your drivers. So, you'd need to find the output spec on your driver, then add them all up and make sure that they're less than the 28mA of your device. In the example above, it would be over 100 drivers.
Most 120/277 0-10V dimmers will run out of electrical capacity before they run out of dimming capacity. For instance, the Eaton SF10P can theoretically handle about 100 fixtures on the 0-10V side, but only 1200 watts on the 120v side.

Good luck,
CD

 

[nsula_country]

Here is something to look at. I did our entire house with this Brand/Style of switch.

http://www.lutron.com/en-US/Products/Pages/StandAloneControls/Dimmers-Switches/Ariadni-TogglerDimmer/Overview.aspx

Did not research to see if they have a 0-10V dimmer though.

CT

 

[mm08822]

I dont know of a toggle style dimmer.
As for the driver, I'd say that there's nothing "typical" in LED fixtures, but to try to answer your question....
The driver outputs (not input draw) a tiny amount of current, usually in micro-amps. The ones that I'm familiar with are in the 150 to 200 uA. Your dimmer needs to be able to sink the sum of the current from all of your drivers. So, you'd need to find the output spec on your driver, then add them all up and make sure that they're less than the 28mA of your device. In the example above, it would be over 100 drivers.
Most 120/277 0-10V dimmers will run out of electrical capacity before they run out of dimming capacity. For instance, the Eaton SF10P can theoretically handle about 100 fixtures on the 0-10V side, but only 1200 watts on the 120v side.

Good luck,
CD

When I first read the maximum sink current spec, I quickly discovered there is another way to max out a 0-10v dimmer. Never gave it a thought before.

I was able to find Lutron Application note # 587 the other day which is a great source of explanation on the 0-10V variations/considerations. Sink and Auto sink/source dimmers do exist, but I was under the impression the dimmer always sourced the 0-10v reference to the fixture. Not so!

Lutron references an IEC std that puts the ballast current somewhere between 10 microamps and 2 mA. Not seeing mfrs spec’ing this value or even stating compliance to the IEC spec. No surprise with so much coming out of China.

I’m looking at using 24 45w led strip lights. So 1080 watts and up to 48mA. That pushes me to a new dimmer. The SF10P you mentioned can handle 200mA and 1200w @120v.

I think I’m going to buy 1 fixture and dimmer first to check compatibility.

Thx for the info.

 

[walta]

Just for grins I hooked a 5k pot across the 0-10 terminals of ONE lamp it seemed to work. Your mileage may vary.


https://www.ledsupply.com/led-dimme...GCmHVr0TnKWWxgo_rO5QDypA8begf2zSWoaArpf8P8HAQ


Walta

 

[mm08822]

Just for grins I hooked a 5k pot across the 0-10 terminals of ONE lamp it seemed to work. Your mileage may vary.


https://www.ledsupply.com/led-dimme...GCmHVr0TnKWWxgo_rO5QDypA8begf2zSWoaArpf8P8HAQ


Walta

As I read that application note, it spoke of the "relay section" and the "signal section".
Had me wondering as well - is the 0-10v dimmer no more than an on/off switch with a pot that also has a min control signal value and max control signal value.....or to your findings: set a minimum resistance and upper resistance value and the slider works values in between.