Bourns em14 series 14mm rotary incremental optical encoders bourns em14a0d c24 l064s a 32ppr incremental optical rotary encoder that has a push end switch and is hcmos cmos and ttl compatible a compact design and high rotational life cycle makes this sensor ideal for a range of applications especially humanmachine interface applications hmi bourns em14a0d c24 l064s rotary optical encoder 64ppr with switch