HLG-185H-48A and CMX22 cobs help

iruleyou1

Well-Known Member
Can somebody please help me get the driver dialed in. I am running 3 Luminus CMX22 per driver. All the guides I am finding are for series drivers but this driver is run in parallel and has 2 dials Vo and Lo. I am pretty sure with my setup I can just crank them both up all the way for max output but want a better understanding on what is correct. Would I dim with Vo or Lo as both seem to have the same effect?

My understanding is Vo limits the max voltage and Lo is for the current. I metered the voltage while adjusting and it looks like the unit can go all the way up to 52.5 volts.

I was thinking I should raise Vo all the way up and dim with Lo but that won't dim all the way. Dropping Vo dims further. However just using the Lo dial is all I will probably ever need to do. I think the Vo dial would be more important if I was running lower voltage cobs to limit their max.

Is my understanding correct? I don't want to break something.
 

MarWan

Well-Known Member
Can somebody please help me get the driver dialed in. I am running 3 Luminus CMX22 per driver. All the guides I am finding are for series drivers but this driver is run in parallel and has 2 dials Vo and Lo. I am pretty sure with my setup I can just crank them both up all the way for max output but want a better understanding on what is correct. Would I dim with Vo or Lo as both seem to have the same effect?

My understanding is Vo limits the max voltage and Lo is for the current. I metered the voltage while adjusting and it looks like the unit can go all the way up to 52.5 volts.

I was thinking I should raise Vo all the way up and dim with Lo but that won't dim all the way. Dropping Vo dims further. However just using the Lo dial is all I will probably ever need to do. I think the Vo dial would be more important if I was running lower voltage cobs to limit their max.

Is my understanding correct? I don't want to break something.
you will have your answer here
https://www.rollitup.org/f/led-and-other-lighting.124/
 

GBAUTO

Well-Known Member
Can somebody please help me get the driver dialed in. I am running 3 Luminus CMX22 per driver. All the guides I am finding are for series drivers but this driver is run in parallel and has 2 dials Vo and Lo. I am pretty sure with my setup I can just crank them both up all the way for max output but want a better understanding on what is correct. Would I dim with Vo or Lo as both seem to have the same effect?

My understanding is Vo limits the max voltage and Lo is for the current. I metered the voltage while adjusting and it looks like the unit can go all the way up to 52.5 volts.

I was thinking I should raise Vo all the way up and dim with Lo but that won't dim all the way. Dropping Vo dims further. However just using the Lo dial is all I will probably ever need to do. I think the Vo dial would be more important if I was running lower voltage cobs to limit their max.

Is my understanding correct? I don't want to break something.
The adjustment screws for Vo and Io give you a bit of range as you discovered. The CMX's divide the rated output current of the driver when wired in parallel. Adjust Vo to get the cobs to light and then use Io to regulate forward current/dimming.
 
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