I need enough power for 3 touch screens @ 27 watts each.? I believe the power supply in a Pro2 is 50 watts.? If I use a CNTBLOCK with the jumper removed, can I connect the Pro2 to net 1 and the first touch screen to net 2?? Then plug a CNPWS 75 watt power supply into net 5 and the remaining touch screens into net 6 and 7 and be under budget?

Yea you will be good with that as long as you remove that jumper.?

WOW!? Thanks JohnMax!!
All these years and I never knew about that Jumper!!? (Maybe I should RTFM!!? HaHa!)

For anyone else not sure about the jumper, it's not something you unplug.? It's a wire that needs to be snipped or un-soldered.? I always knew of it's existence but never needed to deal with it until now.

Perhaps someone here smarter then me can explain why Crestron insists that a cresnet device can only be powered by a single power supply?? 2-24 vdc power supplies in parallel is still 24 vdc.? There is no phase issues like you could run into like you could with 24 vac.? The volts are the same just more capacity.

There's a potential issue if the power supplies are slightly different.

If you have two power supplies, one at 23.5v and one at 24.5v, the higher could backfeed into the lower and damage it if it's not designed to handle this.

开云体育

>2-24 vdc power supplies in parallel is still 24 vdc.

Theoretically yes, practically no.

Do NOT connect power supplies in parallel unless the power supply is designed and specified for being connected in parallel!
It has been a while, but I have seen expensive eqipment getting damaged because of this.

Stay safe
Crestronfreak55

It's more of a NEC code thing.? I believe the maximum power delivered by low voltage Class 2 wiring is 100VA -- that would be about 4A at 24VDC.? Considering most power supplies will actually deliver more than their rated output is probably the reason why the largest Crestron's power supplies are rated for 3A at 24VDC per leg to avoid a situation of exceeding the 100VA limit.

Putting power supplies in parallel is highly depended on the power supply. But in most cased you will find that the one delivering higher voltage will land up delivering most of the current and the other lower voltage one will only start sharing the current load when the higher voltage power supply goes into currently limiting mode (assuming it has current limiting).

Also, if one of those supplies fails, the other will either go into current limiting or if poorly designed then let out the blue smoke with possible 'orrible consequences.

Crap!? Learn something new every day.? Jumper? What Jumper?? LOL!