847H-JN1A-RG02000 - Incremental Encoder, 65 mm Diameter Servo Mount (42 mm B.C.), 3/8 inch Diameter Shaft with Flat, 4.5-5.5 Volt Line Driver,TTL (B-Leads-A, CW, Z gated with BN), MS Connector, 10-Pin with mating connector, 2000 Pulses per Revolution.