ELTRA EH17M40S8/24C6X3PR-ELT Incremental KIT encoder. Size: 37mm. Power Supply: 8 ... 24 V DC. Resolution: 40 ppr. Without zero pulse. NPN open collector (Electronic interface). Bore diameter: 6mm. Enclosure: IP 54. Rotation speed: 3000 rpm max. Cable output: radial. Series is recommended for small size AC/DC motors, stepper motors or for limited size applications.