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Eight (8) Pin AC Synchronous Motor Connections
Superior Electric manufactured an 8 pin integral connector for the AC Synchronous SS Series motors.
The connections are to B, F & G, with B being the center tap or Neutral connection.
G (VAC) to B (Neutral) cases CW Rotation.
F (VAC) to B ( Neutral) causes CCW Rotation.
See attached document for Schematic, Color/Connection Code, Dimensional Outline and pictures of SS91 AC Synchronous Stepper Motor.