Difference between 110v and 240v controllers

[EmmienLightFan]

I have always thought that the only difference was the jumpers on the board.

Printed on is one picture which underneath says 110v, and another that says 220v.

I thought that changing the jumpers to match these images would change the voltage.

 

 

But in the sale I saw this

 

It says that there won't be 220/240v controllers on sale. This implies that there are differences other than the jumpers.

Why are there jumpers there if there are other differences?

[LOR Staff]

The jumpers change how the transformer is wired into the circuit to allow it to change 240v to logic voltage.  In pre G3 devices that was all that was needed.

However in G3 devices there is additional circuitry to deal with LED light sets.  Those circuits are different depending on 120 or 240.

[plasmadrive]

50 minutes ago, DevMike said:

The jumpers change how the transformer is wired into the circuit to allow it to change 240v to logic voltage.  In pre G3 devices that was all that was needed.

However in G3 devices there is additional circuitry to deal with LED light sets.  Those circuits are different depending on 120 or 240.

I'm guessing the internal "snubber" is the limiting factor here.  yes? 

[LOR Staff]

I think you are correct.

[EmmienLightFan]

That would make sense, as snubbers are resistors and would pass higher current if the voltage was increased.

 

Thanks. I didn't know that.

Edited April 9, 2016 by EmmienLightFan