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Splitty 9 fans diagram (how many splitty9s?)
Mittwoch, 1. Dezember 2021, 09:54
I think this is going to be a properly noob question about fan speed control diagram, but here goes and thanks in advance! I have 3 radiators, with 6 fans each. I want to control each bank of 6 fans separately. Do I need :
A: 1 Splitty9, with 6 3-way fan splitter cables (ie 2 3-way splitter cables, one cable for each of the 3 fans per radiator)?
Or,
B: 3 Splitty9s, where each Splitty9 receives 6 fan cables?
I think I need Option B so as to maintain individual control over each of the respective radiators fan banks, as Option A (if it works) would give me the same speed for all radiator fan banks.
Thanks all
A: 1 Splitty9, with 6 3-way fan splitter cables (ie 2 3-way splitter cables, one cable for each of the 3 fans per radiator)?
Or,
B: 3 Splitty9s, where each Splitty9 receives 6 fan cables?
I think I need Option B so as to maintain individual control over each of the respective radiators fan banks, as Option A (if it works) would give me the same speed for all radiator fan banks.
Thanks all
Mittwoch, 1. Dezember 2021, 21:41
The EK Vardar Fans dont work with the Splitty9. The problem is, that all Tach Cables are connected together in the Splitty9, and the Vardar Fans dont like that.
As a Workaround, you have to remove the Tach Cables from all Fan connectors (except for the Fan that is connected to the RPM port on the Splitty9)
Hi thanks for the reply, could you elaborate further on this answer? Am not sure I understand why these fans won’t work, or the comments on the tach cables? I was anticipating to connect six fans to each splitty, each fan directly to the splitty, with no daisy chaining. Thanks!
Mittwoch, 1. Dezember 2021, 23:07
You can try this. If EK fixed their Fans, it works, if not, you have to make modifications.I was anticipating to connect six fans to each splitty, each fan directly to the splitty,
But if you run into problems where you cannot control the Fan speed and the Fan Speed increases or decreases at random, you have to remove the 3rd pin from the Fan connector.
Here is an official Reply to this problem from Aquacomputer Staff:
PWM fans on auqaero 6 lt are not working as expected
Donnerstag, 2. Dezember 2021, 04:29
interesting.It's true cable splitters don't have the tach signals connected at all, only one fan has it; all the others are absent.
Nothing a flush cutter can't solve by snipping the useless pins on the splitty, or cutting the tracks. But that looks like an unusual oversight fron Aquacomputer too, even if the fans shouldn't behave like that either. There's no functional need to run a track to those 8 unused pins, or to ground them. They should have been left floating.
As for the speed control, the controller reads only one fan speed from the fan connected to the socket with "RPM" marked.
The PWM signal is the same for all the fans (that's why these are sometimes called PWM repeaters), so, if the fans are the same model, they will run at the same speed.
The splitty9 has an aquabus splitter option, so all pins 3 need to be contiguous for when that option is selected.
The splitty9 active may not have all pins 3 connected, but that is not discussed in the manual.
Donnerstag, 2. Dezember 2021, 12:49
It’s a shame this is not mentioned in the Splitty9 product details or manual. But will try the clipped pin method if this becomes an issue for me.
The splitty 9 and splitty9 active are two different devices.
The splitty9 product page & manual do give notice all pins 3 are connected with the exception of port RPM when the jumper is removed.
Zitat
By setting the jumper to the “aquabus” position, all four
aquabus signal lines are forwarded to all black connectors.
The splitty9 active does not have an aquabus option, but it does require a SATA power lead.
Not having the aquabus option, there may not be connections between any of the pins 3 on the PWM ports, but it does not state that explicitly.
Donnerstag, 2. Dezember 2021, 14:45
Thanks, yes I read that manual but it was not clear (to me at least) in the text. It reads as if 3 and 4 pin are compatible (notwithstanding the comments that the ‘fault’ is with the fan and not the splitty9, but AC might mention known compatibility issues with major fan manufacturer products in the product literature perhaps)
As mentioned it’s not a big deal to remove pins on the splitty headers. Will let you guys know how I get on
As mentioned it’s not a big deal to remove pins on the splitty headers. Will let you guys know how I get on
Freitag, 3. Dezember 2021, 10:44
So I am new to this area of pc builds, can anyone explain how this works in more detail? Is it that the RPM signal tells the aquaero controller how fast the fans are rotating, and then the aquaero uses this information to adjust the power to the fans accordingly? And this is why only one of the fans needs to report an RPM? Ie, the RPM is not the signal that directly controls a fan's speed, it's the power signal that does this. Thanks, sorry for all the questions!
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