PWM Fan Wiring Diagram
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I've read through quite a few Fan wiring threads and I seem to confuse myself the more I think about this.
I'm running a 24V PSU with a 24V-12V DC-DC Converter but not sure which pins to wire the PWM and Speed Signal to. I'm guessing that the RPM Speed Signal goes to the V_FAN Input and the PWM (+5V) Signal goes to the FAN0-?
I've attached a wiring diagram of what I'm thinking is right. Can someone please confirm or correct me if this is wrong?
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No, the RPM speed signal (green in your diagram) should go via a diode to pin PB6 on the expansion connector as described at https://duet3d.dozuki.com/Wiki/Connecting_and_configuring_fans#Section_Connecting_4_wire_fans. Or leave it not connected. Otherwise OK.
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As many times as I was on that wiki page I never scrolled down far enough to see the "Connecting 4 wire fans" instructions!" I'll admit I'm a bit embarrassed but thank you for helping me out!