A-B Rockwell Automation 847T-HK2C-RH00360. Incremental Encoder, 2" Diameter, Solid Shaft, Standard Servo Mount, 6 mm Diameter Shaft with Flat, 8 30 V DC, 8 30V Line Driver (HTL), Radial Exit, MS 10 Pin w/o Mating Connector, B leads A, CW, Z gated with BN, 360 PPR