Model 771A Features



The Model 771 C-face encoder is a rugged, high resolution encoder designed to mount directly on NEMA C-face motors. Both sides of the encoder are C-face mounts, allowing additional C-face devices to be easily mounted. Many competitive C-face units are kit type encoders, but the Model 771 contains precision bearings and an internal flex mount that virtually eliminates encoder failures and inaccuracies induced by motor shaft runout or axial endplay. The advanced Opto-ASIC design provides superior noise immunity necessary for many industrial applications. This encoder is ideal for applications using induction motors and flux vector control. A Thru-Bore design allows fast and simple mounting of the encoder directly to the accessory shaft or drive shaft of a motor using a NEMA standard motor face (sizes 182TC – 256TC). The tough, all metal housing resists the vibration and hazards of an industrial environment.


  • Large Bore Size to 1.875″ or 43 mm
  • Fits NEMA Size 182TC Thru 256TC Motor Faces (8.5″ AK)
  • Incorporates Opto-ASIC Technology
  • Resolutions to 4096 PPR

For more information on our full range of incremental rotary optical shaft encoders, please contact us.

771A Encoder Data Sheet

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