Product Description:

The AI2500172B323 is an optical rotary encoder produced by Danaher within the Dynapar Encoders series. Designed for position feedback in automated machinery, it converts shaft rotation into a digital word that a motion controller interprets as precise angular data. The unit mounts on motor or axis shafts to monitor absolute position and velocity, ensuring closed-loop control accuracy in packaging lines, robotics, and material-handling equipment.

The encoder provides an absolute accuracy of ±0.01°, allowing tight positional tolerance across a full revolution. The glass code disc turns inside an IP67 housing that blocks dust ingress and protects against temporary water immersion. Continuous operation is supported at speeds up to 10,000 rpm, and a short-term peak speed of 12,000 rpm accommodates acceleration spikes without overspeed errors. Starting friction is low, and the drive needs no more than 1.4 in-oz of torque to overcome seal and bearing drag, minimizing the load on small servo motors. Binary output coding simplifies interface logic because each bit directly represents a power-of-two angular increment. The aluminum shell conducts heat away from the sensing electronics, while a stainless-steel shaft resists wear at the drive coupling. The encoder tolerates up to 75% relative humidity without condensation.

Short-cycle repeat moves benefit from a repeatability of ±0.002°. The square flange presents a 2.5 in mounting pattern that matches common NEMA 23 motor faces, and the solid shaft measures 3/8 in in diameter for direct coupling with standard collets or flexible couplers. The assembly withstands shocks up to 1000 m/s² and vibrations up to 100 m/s² during transportation or continuous service. The glass disc maintains dimensional stability during operation. The aluminum housing keeps the encoder lightweight while preserving the structural stiffness needed for industrial machinery.