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Originally Posted by Dave
E67 controller has 3 fan output drivers - however, when used with PWM fan control, only one of those outputs is utilized. It provides a PWM output at frequency specific to the fan driver controller. I've not measured voltage based on PWM % output to determine what way the voltage goes based on desired output.
When fan drivers are used as discrete outputs, they can be used to close relays that can then be wired in parallel, series or parallel series combination to drive mutliple fans at low and high settings.
I'm a huge fan of PWM cooling fan control as I HATE listening to high speed fan during anything other than track situations that demand it. Nothing worse than pulling up and having the sweet rumble of an engine masked by a fan screaming away.
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Me too on PWM control.
So... net net: I need to use a C6 fan controller since it is definitely compatible with the E67. For dual fans, I need to use two controllers, and hope that the E67 can drive two PWM controllers from the same wire.