Inductive rotary encoders

July 28, 2014 – Heidenhain has expanded its third generation of absolute inductive rotary encoders with the ExI 11xx series. These new products are especially suitable for safety-related applications up to SIL 3, PLe and Category 4, the company says. The ECI 1119 and EQI 1131 each feature an increased single turn resolution of 19 bits, while the EQI 1131 can track 4,096 (12 bits) revolutions. The ECI and EQI encoders showcase improved vibration specifications (400 m/s2 stator and 600 m/s2 rotor), as well as a more durable multi-turn gearbox, and an increased permissible axial motion of the shaft up to ± 0.4 mm, the company says. Other features include a non-contact design, resistance to contamination, no mechanical self-heating, and reduced sensitivity to radial runout. The ExI 11xx series joins the ExI 13xx encoders as the new generation of Heidenhain encoders that feature functional safety and improved robustness. These encoders offer a host of different safety-related functions that can be upgraded even further with the implementation of safe control that supports the EnDat Safety Master.

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