HS35R0250H34E Danaher
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The Danaher HS35R0250H34E is an incremental encoder from the Dynapar Encoders series with a resolution of 250 pulses per revolution and frequency response of at least 100 kHz. It has an enclosure rating of NEMA 4 and IP66, supports shaft speeds up to 3600 RPM, and can handle shaft loading of 40 lb radial and 30 lb axial. The encoder weighs up to 16 ounces and features a running torque of 4.5 oz-in maximum.
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Product Description:
The HS35R0250H34E hollow-shaft unit is an incremental encoder produced by Danaher for the Dynapar Encoders series. In industrial automation, it converts mechanical rotation into electrical pulses so motion controllers can monitor shaft angle, speed, and direction in real time. Mounted on motor or conveyor shafts, the encoder supplies feedback that allows drives to synchronize axes, regulate conveyor speed, and detect slip without adding significant inertia.
The encoder has a minimum frequency response of 100 kHz, meaning the output channels can change state at that rate without loss of fidelity and accurately track high-speed equipment. Each full revolution yields 250 PPR, giving controllers 1,000 quadrature counts per turn for precise position calculations. Pulse transitions occur in less than 1 µs, minimizing skew when the pulses feed high-speed counters. Symmetry is maintained at 180° ±18° electrical, while quadrature phasing remains 90° ±22.5°, ensuring equal high-low duty cycles and a dependable 90° offset for direction decoding. Channel A leads channel B during clockwise rotation to match common wiring conventions. The enclosure carries a NEMA 4 / IP66 rating, protecting the optical disk from dust ingress and water jets. The hollow shaft can operate at speeds up to 3600 rpm before reaching its electronic or mechanical limits.
Continuous drag is limited to 4.5 oz-in of running torque, so the encoder imposes minimal load on the host motor during normal operation. Start-up drag peaks at 5.0 oz-in, limiting the additional torque required when shaft movement begins. The bearing system withstands loads of 40 lb radial and 30 lb axial, allowing it to tolerate belt tension or slight misalignment without damage. With a maximum weight of 16 oz, the device can be installed on light machinery without significantly affecting dynamic balance. Its hollow-shaft design permits direct mounting over a compatible machine shaft, reducing the need for a separate coupling and helping maintain compact installation dimensions.
