| 40mm Series ______________________________________________________ |  | 
  
    |  |  | 40x40x10mm 5 Blades ............................................ |  |  | 
  
    |  | 40x40x10mm 9 Blades ............................................ |  | Fan   			Guide and Engineering Notes  | 
  
    |  | 40x40x20mm 12V & 24V ....................................... |  | Frequency Generation Signal (FG)  | 
  
    |  | 40x40x20mm 5V .................................................... |  | Rotation Detection Signal (RD)  | 
  
    |  | 40x40x28mm 12V & 24V ...................................... |  |  | 
  
    |  | 40x40x28mm 5V ................................................... |  |  |