A-B Rockwell 847H-IL2A-AG02000. ncremental Encoder, 2.5" Diameter, Solid Shaft, 90 mm Diameter Servo Mount, 10 mm Diameter Shaft with Flat, 8-30 V DC, 4.5-5.5 V Line Driver (TTL), Axial Exit, MS 10-Pin w/ Mating Connector, B leads A, CW, Z gated with BN, 2000 PPR