Line Drivers are available for the HEDM-5500 series encoders. The line driver offers enhanced performance when the encoder is used in noisy environments, or when it is required to drive long distances. The HEDL-556x series utilizes an industry standard line driver IC, AM26C31Q, which provides complementary outputs for each encoder channel. Thus, the output of the line driver encoder is A, A, B, B. Suggested line receivers are 26LS32 and 26LS33.