E142540X271X28 Danaher
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The Danaher E142540X271X28 is an incremental optical encoder in the Dynapar Encoders series, featuring a resolution of 2540 PPR and a minimum frequency response of 100 kHz. It is housed in an aluminum body with a glass disc, supports shaft speeds up to 5000 RPM, and has an enclosure rating of NEMA12/IP54. The encoder has a maximum current draw of 80 mA and a shaft made of stainless steel.
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Product Description:
The E142540X271X28 is an incremental optical rotary encoder produced by Danaher within the Dynapar Encoders series. Installed on a motor or machine shaft, the device converts mechanical rotation into electrical pulse trains used by position or velocity control loops in automated equipment. Its optical sensing system provides precise angular feedback for closed-loop control in conveyors, pick-and-place modules, and general motion axes across industrial plants.
The encoder draws a maximum supply current of 80 mA, and its line driver can sink or source up to 40 mA, allowing direct connection to compatible PLC high-speed counters. The resolution is 2540 PPR, providing finely spaced pulses for accurate incremental measurement during each revolution. Signal integrity at elevated shaft speeds is maintained by a minimum frequency response of 100 kHz and a rise or fall time of less than 1 µs. These response characteristics allow the encoder to preserve its square-wave signal geometry during rapid rotation. The glass code disc has low mass, and the rotor has a moment of inertia of 3.8 × 10⁻⁵ oz-in-s², minimizing torque loading on connected servomotors. An aluminum housing surrounds the optical module, while a stainless-steel shaft transmits mechanical rotation to the internal assembly. The permissible shaft speed is 5000 rpm, allowing the encoder to track the rotation of many medium-frame industrial motors.
The sealed body has a NEMA 12 and IP54 enclosure rating, protecting the internal components from airborne dust and low-pressure water spray. The bearings provide a radial capacity of 5 lb and an axial capacity of 3 lb, permitting installation at the end of couplers or through-bore hubs without external supports. The stainless-steel shaft resists corrosion when exposed to common industrial lubricants. The encoder weighs 3.0 oz, reducing cantilever stress on light motor shafts and minimizing the load placed on mounting brackets. Its compact construction also supports installation on moving carriages and other machinery where available mounting space is limited.
