Alight, a little update on my DA reefkeeper system. When I added the NET module I began having some issues with my system as a whole. I was getting skewed iTemp and pH readings and my moonlights weren't powering up all the way.
The problem? Too many modules and not enough power. Also, as you daisy chain the modules together the iTemp is at the end of that chain and the signal degrades skewing the temp reading.
The solution? A RKM-HUB.
They aren't very expensive and ordered one from Jeremy at PA (Thanks Jeremy for taking care of me!). I got it in next day... all excited finally to get my system working.... got it all hooked up... nothing. No power through the HUB, nothing working. Stumped, I called DA customer service where they troubleshoot over the phone and nada. So they process a replacement... but can take about a week coming from Cali and the holiday. Saddened, I opened up the HUB and whoa! way to go quality control... nothing is soldered to the circuit board! So I get excited to have an excuse to whip out the soldering iron, 20 minutes later, Voilà! fixed and working HUB.
I get everything plugged in, (the HUB allows you to connect everything to it in a star like pattered instead of daisy chaining the modules together without it), plug in the HUBs auxiliary power source and everything is up and running perfectly. I would say that this HUB is needed after you get to 3/4 modules. Not only does it boost the systems power, but it allows your bus cables to be connected with no signal degradation to the head unit.
How my system is now connected:
RKL -> PC4 -> HUB <- aux power
......................| -> iTemp
......................| -> SL2 -> pH -> ATO switch
......................| -> NET
......................| -> MLC -> 3x LED