2.5", Optical Incremental, NEMA 4, Class I DIV II, double bearing with shaft seal, 80 lb shaft load, Flange mount, Programmable from 1 to 4096 count, 8-30V power, Open collector outputs with 2.2K?, Side connector, 10-pin Differential Quadrature Incremental Encoder with Index and complimentary outputs, M12 connector, Standard Aluminum case