Bourns em14 series 14mm rotary incremental optical encoders bourns em14a0d c24 l064n a 64ppr incremental optical rotary encoder that 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 l064n rotary optical encoder 64ppr