WIRING the ELN-60-48D

[TheFishMan65]

The maximum current of a string is decided by the LED that can take the lease. So if you mix XR-E. XP-G, and XM-Ls then the limit is 1000ma.

The multimeter goes in series. for current Open the string and insert meter.

 

[neoonex]

eln 60-48d led wiring

eln 60-48d led wiring

how can I wire an eln 60-48d up with 12 leds in parallel?

 

[MHG]

If you are running 12 or 13 LEDs on your '48' you don't need to mess with the voltage adjust.

You can change the settings with the driver on. Be very careful you touch nothing when that driver is plugged in. Anything could be live, like those pieces of metal.

On your meter, if you change things over to current measure absolutely always power down. Remember if you interrupt the chain while the driver is powered - you will fry the chain.

Also, always unplug the meter current lead from the meter and replug it into the voltage position IMMEDIATELY when done measuring current. Not doing that will surly result in you picking up the probes and trying to measure a voltage while the meter is in current mode. Result - blown meter.

I saw something about this in another thread about frying all the led's if you break the chain. I am unclear why this is... If one LED Blows open, it will take the whole chain and fry the LED's? why does an incomplete circuit fry anything? I have been an electronic tech for 20 years and have never seen this in any other type of component. Including regular LED's. I have never worked with these type yet so I obviously need to learn more...

 

[CJO]

how can I wire an eln 60-48d up with 12 leds in parallel?

Why would you want to?

CJ

 

[neoonex]

Well im using 72 white, 18 blu and 18 royal blu. for a total of 108 leds on a 110gal with 5 drivers. A better question would be, can I have only 18 leds on one driver instead of what Ive been told, 12 in parallel or 24 in a string. Or should I just do 72 white 24 blu and 24 royal blu for a total of 120 leds on a 110gal. i don't want to go over... and as far as i see now there no " rule of thumb" with leds, so im not sure how many I should have, "per gal."

 

[CJO]

If you are using the Cree XP-G, XR-E or XL-M LEDs, you can have up to 12 in series (a string), running at up to 1.4A with the XL-M or XP-G and 1A with the XR-E. However, many people prefer to run them lower (1A with the XP-G and 750mA with the XR-E). You can run up two two strings of 12 in parallel, but have to lower it so that the driver doesn't put out over 1.4A (700mA per string).

Have you looked at the DIY LED thread?

CJ

 

[nanojg]

If you are using the Cree XP-G, XR-E or XL-M LEDs, you can have up to 12 in series (a string), running at up to 1.4A with the XL-M or XP-G and 1A with the XR-E. However, many people prefer to run them lower (1A with the XP-G and 750mA with the XR-E). You can run up two two strings of 12 in parallel, but have to lower it so that the driver doesn't put out over 1.4A (700mA per string).

Have you looked at the DIY LED thread?

CJ

No, you can have up to 16 xmls on a string and up to 14 xp series. You can also have more strings, but the current will be lower each time.

 

[CJO]

No, you can have up to 16 xmls on a string and up to 14 xp series. You can also have more strings, but the current will be lower each time.

That actually depends on the forward voltage of each LED. 12 is obviously a rough number.

CJ

 

[nanojg]

The 12 number always referred to is for XREs, it has stuck around long after people quit using those leds.

 

[CJO]

The 12 number always referred to is for XREs, it has stuck around long after people quit using those leds.

Again, it is based off of the forward voltage of the LEDs. The XR-E's have an average forward voltage of 3.5V at 700mA. Twelve of those in series would be approximately 42V, which leaves you a decent headroom on the 48V driver being used in case you happen to get some that are higher.

The XP-G's have an average of 3.3V at 1A, which is approximately 40V for 12, but can go as high as 3.75V at 350mA (there are no published specs at 1A, but they do vary relatively linearly with the current), so you are still likely safe at 12, but may not be with more.

Again, the XM-L's have a lower forward voltage than either the XP-G's or the XR-E's, but can still get up to 3.5V at 350mA, and will be even higher at higher currents. The average forward voltage at 1.5A (the current I think most people will likely use with them in series) is 3.1V.

I'm an engineer, and when supplying a rule-of-thumb, would prefer to be a little bit conservative. However, looking at the numbers, there is not that much room for variation. I would definitely be hesitant to recommend 14 XP-G's, even at a conservative current (1A), and I would never recommend 16 XM-L's at even 50 percent of their rated current as just the average forward voltage of those would exceed the rated output of this driver.

CJ

 

[kcress]

I saw something about this in another thread about frying all the led's if you break the chain. I am unclear why this is... If one LED Blows open, it will take the whole chain and fry the LED's? why does an incomplete circuit fry anything? I have been an electronic tech for 20 years and have never seen this in any other type of component. Including regular LED's. I have never worked with these type yet so I obviously need to learn more...

An open chain does not "blow LEDs'. But hooking back up an open chain to a running driver could.

A current driver is a device that delivers a fixed current. The only way it can control the current is by actually controlling the voltage. When the current drops below the requested value the driver raises the the voltage that is 'pushing' the current.

When a string is opened for some reason the current by definition will drop to zero. Automatically the driver will crank the voltage to the very highest level it's capable of....

Now, Jonny Dipwad re-attaches the wire, he so lamely let fall off...
The string gets hammered with the driver's full output before the driver can respond. Often the LEDs survive because they're pretty robust. Sometimes they don't.

 

[nanojg]

Again, it is based off of the forward voltage of the LEDs. The XR-E's have an average forward voltage of 3.5V at 700mA. Twelve of those in series would be approximately 42V, which leaves you a decent headroom on the 48V driver being used in case you happen to get some that are higher.

The XP-G's have an average of 3.3V at 1A, which is approximately 40V for 12, but can go as high as 3.75V at 350mA (there are no published specs at 1A, but they do vary relatively linearly with the current), so you are still likely safe at 12, but may not be with more.

Again, the XM-L's have a lower forward voltage than either the XP-G's or the XR-E's, but can still get up to 3.5V at 350mA, and will be even higher at higher currents. The average forward voltage at 1.5A (the current I think most people will likely use with them in series) is 3.1V.

I'm an engineer, and when supplying a rule-of-thumb, would prefer to be a little bit conservative. However, looking at the numbers, there is not that much room for variation. I would definitely be hesitant to recommend 14 XP-G's, even at a conservative current (1A), and I would never recommend 16 XM-L's at even 50 percent of their rated current as just the average forward voltage of those would exceed the rated output of this driver.

CJ

Im just going off of the voltage graphs from the cree data sheets. IMO you can run up to 16 xmls (although I am only doing 15 on my build to be safe) or 14 xpe's (im only doing 13) off one eln 60-48.

 

[CJO]

Im just going off of the voltage graphs from the cree data sheets. IMO you can run up to 16 xmls (although I am only doing 15 on my build to be safe) or 14 xpe's (im only doing 13) off one eln 60-48.

Those are averages. What happens if you happen to get a batch with higher forward voltages (which is statistically a possibility with the small numbers we use)? Take a look a page or two back from the graph and you'll see a table that lists the maximum.

CJ

 

[jonny88888]

meanwell 60-48d question

meanwell 60-48d question

Hello All,

I got a free 60-48d, that I'd like to use w/ some FEDY LEDS I have on hand..

I haven't used the 60-48d before... if I want to run this w/ out the dimmer functionality can I, or do I have to run 10v to the dimmer as well?

Thanks for your help!