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Panaflo fan, can I convert from 2 pins to 3 pins?

post #1 of 16
Thread Starter 
About a year ago I bought a pair of Panaflo FBA12G12W REALLY cheap. I was going to use them on my CPU cooler but when I got them I was disappointed. It was only wired as molex... just 2 wires. I have been saving them till I finally get a fan controller but never got one yet. I tried them out on a PSU at full speed and my wife just blew up asking me to turn it off cause it was too loud. I rigged one of the fans as to test it at 5v. It was quiet, but felt like no air being pushed at all. Bummer.

Fast forward to today: I have been following the GT 2150 threads. reaper posted a picture of his bare fan that only had 2 wires. In the picture it showed 3 solder spots, 1 for Voltage, 1 for Ground, and a 3rd that had S above it so it could be sensor? This gave me a thought about mine.

I peeled back sticker on the Panaflo and find that there's a 3 pin connector soldered as 3 just like in reaper's picture.

I'm wondering if somehow adding a 3-wire pin would it then be a 3 pin fan? Plan is to connect to mobo and let bios or software to control speed.

I will probably try it out if I don't get a definite no.

DSCN2340.jpg
Edited by Krusher33 - 2/5/11 at 7:23pm
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post #2 of 16
Adding another wire really wouldn't benefit anything if you're on a fan controller (assuming the controller doesn't have RPM readout).
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post #3 of 16
Thread Starter 
Quote:
Originally Posted by beers;12277722 
Adding another wire really wouldn't benefit anything if you're on a fan controller (assuming the controller doesn't have RPM readout).

I have no fan controller, plan was to connect to mobo and let bios or software deal with speed control.
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post #4 of 16
All the 3rd pin is for is the fan's built in tachometer.
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post #5 of 16
Thread Starter 
Quote:
Originally Posted by pyro_dude;12277864 
All the 3rd pin is for is the fan's built in tachometer.

Does it really have one though?

It looks as though I will give it a shot. But not tonight as I got other business to tend to. And not tomorrow because of what should be a holiday since lots of folks get drunk off their ... um. Yeah. That.
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post #6 of 16
you can add the third wire, but most likely the fan doesnt have the tach circuit anyway
post #7 of 16
According to this thread here on another forum, that particular model doesn't have RPM sensing.
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post #8 of 16
The answer is NO, been there, done that.

The RPM sensor is built in the circuit board inside with the fan code "BX" only, and if its not BX model, you can not simply add the 3 rd wire to enable it since the feature is not made in there.
post #9 of 16
I have wired a few fans that had two wires to three and all the tacho's worked.

So I would just wire it up and see what happens.
post #10 of 16
Quote:
Originally Posted by Bing;12279372 
The answer is NO, been there, done that.

The RPM sensor is built in the circuit board inside with the fan code "BX" only, and if its not BX model, you can not simply add the 3 rd wire to enable it since the feature is not made in there.

Depends though, sometimes they dont list it as having it even though it really does, they just say no cause the cable isnt there and terminated.

The only way to find out is to just add the wire and see if it works. Maybe you'll be lucky and it will work and then again maybe not.
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