KCI 120 Dplus Rotary Encoder


Designed to fulfill two critical needs via a single component in high accuracy robots, the KCI 120 Dplus rotary encoder is an absolute encoder that provides both reliable feedback to a robot’s motor and accurate position measurement to its controller to enable safe and accurate motion.


Extremely compact, the encoder consists of one scanning head and two different types of rotor units, all connectable to a controller/drive via a single cable. Only 0.79 in. (20 mm) in height, its small footprint and low weight makes it useful in tight installation spaces, rendering it attractive for a variety of high accuracy motion control applications.


The rigid design of this new two-in-one encoder permits high vibration loads of up to 400 meters per second squared on the stator and 600 meters per second squared on the rotor. With its robust inductive scanning method, the encoder is particularly resistant to contamination and magnetic fields.


The KCI 120 Dplus encoder is available with Functional Safety capability and, with measures in the control, can achieve SIL 3 safety rating. This allows manufacturers to minimize malfunctions and facilitate the safe operation of its associated machines and automated systems.


  • Added second position measurement functionality
  • High axial tolerance
  • Hollow through shaft diameter: 0.75 in. (19 mm)
  • Robust inductive scanning
  • Positioning accuracy
  • 1 048 576 positions/rev.
  • Max. operating temperature: 239°F (115°C)
  • Interface: EnDat
  • Housing diameter ≈ 3.2 in. (81 mm)
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