HP/AGILENT - HEDS-5500#F14 - Three Channel Optical Encoder

Quick Assembly Two and Three Channel Optical EncoderEach encoder contains a lensed LED source an integrated circuit with detectors and output circuitry and a codewheel which rotates between the emitter and detector IC. The outputs of the HEDS-5500/5600 and HEDM-5500/ 5600 are two square waves in quadrature. The HEDS-5540 and 5640 also have a third channel index output in addition to the two channel quadrature. This index output is a 90 electrical degree, high true index pulse which is generated once for each full rotation of the codewheel.