An incremental rotary encoder is a type of electromechanical device that converts the angular motion or position of a rotary shaft into analog or digital code that represents that motion or position . Specification: Pulses Per Revolution: 500 Encoder Technology: Incremental Maximum Revolutions: 6000rpm Output Signal Type: NPN Open Collector Shaft Type: Solid Shaft Diameter: 6mm Supply Voltage: 5 ? 24 V dc IP Rating: IP50 Height: 59mm Series: E6C3 Switching Frequency: 100 kHz Packages Include: 1 x 500PPR OMRON Incremental Rotary Encoder E6C3 5V DC