Avago Technologies HEDR-55L2 High Resolution Series Three Channel Quick Assembly Encoders are higher resolution replacements for Avago's existing low cost HEDS-5xxx series three channel optical encoders. These upgraded encoders now come with resolution of 1200cpr to 3600cpr and are designed for easy assembly. The base-plate and outer diameter of these encoders are also compatible with the legacy HEDS-5xxx series making them ideal replacements for users who wish to upgrade due to higher CPR requirements. Each encoder contains a codewheel, LED source, detector, and integrated circuitry. As the codewheel rotates, the detector IC generates two square waves in quadrature and an index pulse (high state) of 90ºe (gated to signal A and B low), once per each full rotation of the codewheel. The HEDR-55L2 encoders accommodate shaft diameters of 2mm to 8mm and are capable of operation in high temperature environments up to 100ºC. Either shielded cable (single ended or line driver) or ribbon cable (line driver) pin-out connectivity options are available. These encoders are ideal for high volume applications such as industrial printers, plotters, tape drives, positioning tables, and automatic handlers.