Reef Angel Forum

So got my RA+ in and trying to install my dimming module to a ldd driver board. I know on the dimming modules, the first 6 slots is for channels 0-5 and the last 3 slots are for the ground. Looking at the board i got, the top green slots are for LED output, bottom left is vdc input and bottom right 8 slots are for PWM in. But there isn't one for ground to the dimming module? does the dimming module need a ground?

thanks!

Yes, should be the same as the GND of your power supply.
I think it is the white one in your photo. I can't see the marking underneath it.

I guess you are referring to the -V in the picture below when you say ground and not the actual ground coming from the VAC next to the neutral and live.

I am using 2 power supplies, should each one have a -V going to the ground on the dimming module?

Thanks!

Yes, the V- of your power supply.
Just one is enough, because they are already connected together in your LDD board.
I'm not much of a fan of paralleling power supplies, because most are not designed to be operated that way, unless they are really expensive and made specifically for the redundancy and load sharing.
Here is a simple article about paralleling power supplies:
http://www.digikey.com/US/EN/techzone/p ... dules.html