E1402500070X21 Danaher
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The Danaher E1402500070X21 is part of the Dynapar Encoders series and features a resolution of 250 pulses per revolution with a frequency response of at least 100 kHz. This encoder has a sealed bearing type, supports a maximum shaft speed of 5000 RPM, and accommodates axial and radial loads of 3 pounds and 5 pounds, respectively. It operates with a 5 VDC supply voltage and offers a differential, bidirectional output with index.
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Product Description:
The E1402500070X21 is an incremental rotary encoder manufactured by Danaher for the Dynapar Encoders series. The device mounts on motor or line shafts and translates rotation into two square-wave channels and an index pulse so that PLCs and servo drives can track angular displacement and direction in real time within industrial automation systems. Its sealed construction and modest inertia make it suitable for packaging lines, conveyors, and light-duty positioning tables that demand rapid feedback without adding large parasitic loads.
It delivers a resolution of 250 PPR, meaning each revolution is subdivided into 250 evenly spaced pulse cycles so controllers can resolve 1.44 mechanical degrees per cycle. The encoder operates from a single 5 VDC logic rail and employs differential line-driver outputs for noise-resistant signaling over long cable runs. Internal optics and amplification support a frequency response of at least 100 kHz, allowing the pulse train to remain square during high-speed operation. The stainless-steel shaft can safely spin at up to 5000 rpm without exceeding bearing ratings, and ball bearings retain lubricant while blocking contaminants. Startup friction is limited to 0.43 oz-in of torque, helping small servomotors accelerate predictably. Electrical symmetry is maintained at 180° ± 18°, quadrature separation stays within 90° ± 36°, and the index pulse is phased 90° ± 25° relative to channel A. The moment of inertia is only 3.8 × 10⁻⁵ oz-in-s², reducing the dynamic load on delicate drive trains.
The mechanical interface is designed for operating stresses common to light conveyors. A stainless-steel shaft journal with a diameter of 1/4 in mates directly with standard couplings, while the bearing assembly tolerates an axial load of 3 lb and a radial load of 5 lb within its operating limits. The differential driver can source or sink up to 40 mA, providing sufficient output current for compatible receiving circuits. These load limits allow the encoder to withstand forces transmitted through properly aligned couplings during normal machine operation.
