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gomer August 15, 2010 03:57 PM

fan wiriring
 
so ive got a 4 channel fan contoller and i wanna hook up my fans in parrellel to that one knob will adjust a set of fans instead of just one. i have 8x 120mm gentle typhoons on a 480 rad for 1 channel, 4x 120mm gentle thyphoons on a seperate 480 rad for another channel, and 4x 140mm slip streams case fans for the third channel. fourth channel wont be used. can i due this? or will it draw to much amps or voltage and destroy my controller? o and its all sythe gear includeing the controller its the one with temp displays aswell 1x 5.25 bay.

thanks

_dangtx_ August 15, 2010 04:37 PM

if you have a good controller, you can hook up a number of fans on one channel. try not to get close to max rated current draw per channel. a good company will post specs,real specs.
i favour sunbeam for cheap but still good ones, or lamptron for heavi(er) duty stuff.

SugarJ August 15, 2010 04:39 PM

If your fan controller is the Kaze Master Ace NCIX.com - Buy Scythe Kaze Master Ace 5.25IN Bay 4 Fan Controller Black with Temperature and Fan Alarm - KM02-BK In Canada. then max draw is 1 amp per channel. Your fans should state their draw right on them. Add them up.

gomer August 15, 2010 05:22 PM

Technical Data:
500 rpm: 0.015 A - 5 dBA - 31 m/h
800 rpm: 0.023 A - 9 dBA - 48 m/h
1,150 rpm: 0.034 A - 16 dBA - 63 m/h
1,450 rpm: 0.049 A - 21 dBA - 85 m/h
1,850 rpm: 0.083 A - 28 dBA - 98 m/h

thats the specs on the fans, i bought the 18050 rpm ones but ill only be running then around 1150 or less. just checked out ncix and the highest controller amp rating per channel i could find was 1a wich should work if i divide the 8x fans on the 480 rad into 2 channels the only worry is the "starting amperage" listed on the fan wich is .36 of an amp x4 = about 1.5 amp draw but thats at 1850 rpm soo if i keep them turned low i should be alright? and does anyone know if these channels are fused at all or will they burst into flames if i crank up my speeds?

thanks for the help guys

MpG August 15, 2010 10:49 PM

Usually with fan controllers, they give their maximum current rating based on the fan(s) full-load current draw, but the fan controller actually needs to dissipate more heat when you turn the fans down, because less of the power actually gets to the fan itself. You're welcome to try it, but I have my doubts that the controller is going to handle that many fans.

Zero82z August 15, 2010 11:36 PM

Quote:

Originally Posted by MpG (Post 416324)
Usually with fan controllers, they give their maximum current rating based on the fan(s) full-load current draw, but the fan controller actually needs to dissipate more heat when you turn the fans down, because less of the power actually gets to the fan itself.

That only occurs with resistor-based controllers that control the voltage going to the fans by increasing or decreasing the resistance. Most if not all modern fan controllers use PWM circuits to control the voltage, which do not have that problem. The heat production will increase with the amount of current the PWM circuit must deliver.

MpG August 16, 2010 01:09 PM

Quote:

Originally Posted by Zero82z (Post 416336)
That only occurs with resistor-based controllers that control the voltage going to the fans by increasing or decreasing the resistance. Most if not all modern fan controllers use PWM circuits to control the voltage, which do not have that problem. The heat production will increase with the amount of current the PWM circuit must deliver.

True, but a limit of 1 amp sounded kind of poor for a PWM-based setup, so I was guessing that it was resistive/regulator based. Hard to say, I suppose. Looking at the circuit board, the IC/cap/resistor setup for each channel could easily be either a PWM or variable-voltage type circuit.


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