Internal field current output varies by frame size. 
    - Frame Size 1 to 8A, current controlled with field weakening
 
    - Frame Size 2A and 2B to 10A, fixed voltage use FXM5 for field current control
 
    - Frame Size 2C and 2D to 20A, fixed voltage use FXM5 for field current control
 
Optional FXM5 external field controller for field currents up to 90A
    - Digital link for field control from Mentor II or Quantum III
 
    - Standalone control mode
 
    - Field weakening
 
    - Field economy mode 
 
 

FXM5 Field Control 20, 50, 90A Models