2.5", Optical Incremental, NEMA 4, Class I DIV II, double bearing with shaft seal, 80 lb shaft load, Servo mount, Programmable from 1 to 1024 count, 10-30V power, 10-30V output, Side connector, 10-pin Differential Quadrature Incremental Encoder with Index and complimentary outputs, M18 connector, Standard Aluminum case