Steve, I am using the Drok XY-PWM1 (product code <span class=”p-model”>200393</span>) to control multiple Orion OD9238-12HHBXC10A fans and it works very well.  The Orion OBD22071-24HB10A fan you mentioned is a 24V DC fan while the Orion OD9238-12HHBXC10A fans I am using are 12V DC.  The XY-PWM1 specifications state its working voltage is “3.3 ~ 30V”.

Because I’m using several of these 42 Watt fans with a single XY-PWM1 controller, I am using a Mean Well SPV-300-12 power supply (300W, 12V DC, 25A) to power all of the fans directly.  I am using a separate Mean Well GST18A05-P1J (18W, 5V DC, 3A) to power the XY-PWM1 controller (and to power on/off the SPV-300-12 power supply).  I join all of the blue PWM wires from the multiple fans using splice blocks and they ultimately connect to the “PWM” contact on the XY-PWM1 controller.

With the fans I’m using, the operating duty cycle ranges from 5-6% to 100%.  Below 5-6%, the fans do not spin.
The Orion fans (at least the two models mentioned here) have a preferred operating frequency of 25 kHz, so the XY-PWM1 controller needs to be set to 25 kHz to match the fans.  Thankfully, the XY-PWM1 retains its settings, so when it’s powered off/on, the most recent frequency and duty cycle settings are still active.

Wiring:
XY-PWM1 “V-“:  V- from my 5V power supply (24V power supply for your fan in your case)
XY-PWM1 “V+”:  V+ from my 5V power supply (24V power supply for your fan in your case)
XY-PWM1 (ground symbol) (“PWM-” on the circuit board):  not connected
XY-PWM1 “PWM” (“PWM+” on the circuit board): leads to multiple blue PWM wires from multiple fans

Using the continuity tester on a multimeter, I found the “V-” and (ground symbol) contacts are connected.