The 61B11-01-02 is a standard, unsealed optical encoder from the Series 61B, featuring 32 positions and an integrated pushbutton. This device provides a 2-bit quadrature coded output with an 11.25° angle of throw and operates on a 5 Vdc supply. The integrated pushbutton is rated for 5 Vdc at 10 mA and has an actuation life of 3,000,000 operations, while the encoder itself is rated for over 1,000,000 rotational cycles. Its rugged, optically coupled design makes it suitable for applications requiring precise user input, such as display navigation, menu selection, volume control, and setting parameters in industrial equipment.