Rotary-pulse transducers with an opening. These encoders enable measurement of angular displacements - ie angle and linear velocity measurements. They also allow you to recognize the direction of movement
Determining the relative position is possible thanks to the counting of pulses. The number of bars on the transducer pitch determines the number of pulses that the transducer counts and sends to the control system with each revolution.
Rotary-pulse transducers are made in several standard outputs: the most popular OC enables output operation from the inverter's supply voltage to the input transducer and is ideal for optoisolation of the measurement system, standard NL with 5V power supply is well-suited for high speed, the PP standard is good is used in industrial conditions with PLC controllers.