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Old 12-28-2011, 08:08 PM   #1
apw63
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(Crimping guide) How to make a PWM fan splitter

Since I have not seen a crimping guide on EXTREME Overclocking Forums, I decided to make one. I normally make my own fan splitters. I have bought some in the past, but I prefer to make my own. I’m making this guide for information only, build splitters at your own risk.

Wire specs
Wire Gauge 22 AWG
Conductor Strand 7/30
Voltage 600V

Fan specs
I use NB-MultiframeŽ S-Series 120mm
Model M12-P
Size 120mm
Rated voltage 4.5-13.2V
Start voltage 4.5V
Input power voltage 2.64 Watt

PMW pin out info I did not use colored wire for my guide
Fan Connector Pinout and Wiring Colors

Pin Function Wire Color


1 GND Black
2 12 V Yellow
3 Sense Green
4 Control Blue

Why did I list fan and wire specs? When making splitters for multiple fans. The power load must be known to safely operate multiple fans. All motherboard and fan controllers have specific amounts of power that can be safely pulled from each channel/header. Some motherboards list total power per fan header, some list for all headers combined. Once you know how much power your motherboard or fan controller can handle. You can determine how many fans you can support per channel/header.
My fans have a starting voltage of 4.5V and input power voltage2.64 watts, one of my fans will pull 0.564 amps at startup. 22 AWG wire can safely handle 7 amps.

Tools

Crimper
Stripper


Parts
Male 4-Pin Fan Connector
Female 4-Pin Fan Connector
Male Shielded Fan Molex Connector Pins
Female Fan Molex Connector Pins
Wire Gauge 22 AWG




You only need to remove enough insulation so that the first arms can fold over the insulator and not the wire. The second sets of arms are for the wire.




It’s important to get the pin in the crimper correctly. You want to make sure that the little ears are outside of the front of the crimper.




Make sure the backend of the pin is just inside the backend of the crimper.





Make the first crimps, for a PMW Fan splitter only one (pin 3) sense wire is needed. I crimped the female oneperfect. When crimping the male one I got the wire pushed a little to far in to the pin. It will work just fine, it’s just not 100% perfect.



All of the other legs will require 1 GND (pin 1), 1 12V (pin 2) and 1 control (pin 4) for each. If you wish to make a 3 or 4 fan splitter I would suggest AWG 24 wire. With the AWG 22 wire you really can’t get any more than 2 wires in the crimp. Also I would suggest powering a 3 or 4 fan splitter from the PSU not the motherboard header. I will make a 3 fan splitter with PSU power connection in the near future. I will post pictures of that build.




Just make the rest of the legs and assemble.




This guide will apply to any PC wire crimping.

Andy

Last edited by apw63; 01-02-2012 at 09:41 PM.
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Old 12-28-2011, 08:53 PM   #2
Jahova
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A very good guide.

Thank you for pointing out the insulator needs to be crimped. For some reason in both the hardware world, and automotive world people always forget to crimp both the insulator and the conductor.
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Old 12-29-2011, 05:42 PM   #3
pckid9234
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sweet guide +1
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Old 01-01-2012, 09:12 PM   #4
jwigeland
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GAH! I wish I'd seen this before I made all the custom power connectors for my graphics card. I only crimped the wire...
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Old 01-02-2012, 09:06 PM   #5
killermodz
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You don't happen to have a link to that crimper do you? I always seem to need one at one point or another, but never manage to go and buy one, lol.
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Old 01-02-2012, 09:40 PM   #6
apw63
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Quote:
Originally Posted by killermodz View Post
You don't happen to have a link to that crimper do you? I always seem to need one at one point or another, but never manage to go and buy one, lol.
I got mine here MDPC Crimping-Tool

Andy
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Old 01-09-2012, 09:32 PM   #7
jmossman
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Great guide. I've done most of my own crimping for a few years. It took some trial and error to figure it out, and crimping the insulator was one that took me a while to grasp. After that, it was smooth sailing. Really is tricky at first to not mangle the pins. Then again I didn't have a guide to help.
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Old 02-18-2012, 10:44 AM   #8
Pierre
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Nice Crimping Guide Andy!

So - Now I can 'easily' convert my fans to PWM headers on the mobo so that SpeedFan will actually be able to cool my systems more effectively here in Southern Arizona!

That's *HUGE* for me!

Great Job Andy...

Thank You!

Patrick
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Old 02-18-2012, 11:31 AM   #9
musicfan
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Excellent tutorial Andy!!! Thank you.
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Old 08-15-2014, 09:06 AM   #10
njs23
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Great Guide One question though

Great guide i just have one question. I have been trying to find a good place to purchase the molex pins and the connectors and what they are specifically called? The only place where i have found them because of my lack of technical terms was MDPC but they do not have the female connectors for the fans.
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Old 08-17-2014, 09:55 PM   #11
apw63
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Shielded Fan Molex Connector Pins (Male)

Shielded Fan Molex Connector Pins (Female)

Fan Connectors

Andy
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Old 10-11-2014, 11:35 AM   #12
DRT-Maverick
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I'm about to do an order for some ATX female terminals from molex. Would there be any reason to pay the extra-overhead for gold plated pins if I don't plan on removing and plugging the cords in very often? From what I am aware of, the reason for going gold is that it's less reactive than other metals (doesn't oxidize or rust) and will maintain its ability to have a good contact after numerous 'unplug, replug' in events. Is this about right on my assumption?
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Old 10-12-2014, 06:30 AM   #13
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IMO for this application I don't think it matters, it would be a personal preference.

Andy
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Old 02-22-2015, 04:25 PM   #14
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Anyone know where you can now get MDPC crimpers? Looks like the site is on hiatus. I was looking at Lutro0 crimpers as well but they are also completely out of stock. I've seen these, but not sure if either are good:

http://www.moddiy.com/products/Profe...ping-Tool.html
http://www.performance-pcs.com/delux...rimp-tool.html

Thanks.

JR
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Old 02-23-2015, 09:45 AM   #15
apw63
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Quote:
Originally Posted by jriker1 View Post
Anyone know where you can now get MDPC crimpers? Looks like the site is on hiatus. I was looking at Lutro0 crimpers as well but they are also completely out of stock. I've seen these, but not sure if either are good:

http://www.moddiy.com/products/Profe...ping-Tool.html
http://www.performance-pcs.com/delux...rimp-tool.html

Thanks.

JR
The ones you linked to will work just fine. The ones you get from MDPC are just setup and tested.

Andy
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