Zitat von »LarryWill729«

First, I am not an electrical Engineer or an employie of AC. But, I have seen Shoggy post on other threads that the AQ5 will handle 8 PA2's and Two Aquastream pumps on the High Speed bus with the current firmware. with room to spare for more. Given that Aquastream pumps have Aquabus addresses of 10 or 11, and the PA 2 addresses are 50,51,52,53,54,55,56,57, and up to 4 MPS sensors can be connected as well. I don't think there is really a limit to the Aquabus daisy chain devices, only a limit on what devices the Aquero can control.
For the total length, I sugest measure the standard "Aquabus cable" length and multiply by 10 for unshielded cable length. More if shielded cable is used.
I am guessing that you want to run an Aquabus cable from the computer out of your case and over to a PA2 or pump living inside an external radiator case/housing. If that is your plan, I would take a standard 5pin USB cable and change the connectors to three pin and not worry about it. I think the practical limit to Aquabus length is voltage drop through cable end connections, not wire length. Given the care the Aqua Computer guys have shown so far, I am fairly sure someone in their R&D tested the amount of RFI the Aquabus picks up and made alowance for it. I kind of doubt they tested for how long the cables can be and still operate correctly. The longest USB cable without a booster is 15 feet as far as I know, and the AQUA bus probably uses the same electronics for both USB and Aquabus, just differnt pin outs. So I would GUESS that a total of 10 to 15 feet with all devices connected would be about the limit.
Good luck!

Zitat von »Shoggy«

The maximum length will depend on many things and will also vary from system to system. Keep that as short as possible.

2.5m already sounds very critical to me.