HR52505000011 Danaher
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The Danaher HR52505000011 is part of the Dynapar Encoders series and is an incremental optical encoder with a resolution of 500 pulses per revolution. This flange-mounted encoder features a NEMA12/IP54 rated enclosure, a shaft diameter of 3/8 inch, and supports shaft speeds up to 10,000 RPM. It utilizes a two-channel quadrature signal format and has an open collector single-ended output with a maximum output current of 40 mA.
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Product Description:
The HR52505000011 encoder is an incremental optical feedback device produced by Danaher for the Dynapar Encoders series. It translates mechanical rotation into electronic pulses so that drives and PLCs can monitor speed and relative position in automated machinery. Designed for general-purpose motion feedback, the unit couples to motors or line shafts and transmits two time-shifted signals that allow the receiving controller to determine rotational direction without the added complexity of an absolute position track.
With a base resolution of 500 PPR, the encoder allows 2,000 counts per revolution when the receiving equipment uses standard ×4 decoding. Its two outputs use a two-channel quadrature AB format, and the electrical phase shift is maintained at 90° ± 22.5° electrical. Mark-to-space symmetry remains within 180° ± 18° electrical, helping the receiving controller distinguish pulse transitions consistently. These timing limits support operation at a maximum speed of 10,000 rpm. A high-speed sensing head provides a minimum frequency response of 100 kHz, allowing the device to reproduce short pulse intervals without signal dropout. The solid shaft has a diameter of 3/8 in, making it compatible with many fractional-horsepower motors. An optical disc inside the housing produces clean transitions for connected logic receivers.
The output electronics use an open-collector output stage that is compatible with common 5–30 V pull-up circuits in drive cabinets. This stage supports a maximum sink current of 40 mA. The signal path is single-ended, and the encoder does not include an index channel, which reduces the number of required signal connections. A flange-mounted body aligns the code wheel concentrically with the machine shaft, while the side-mounted connector provides cable access without disturbing nearby hardware. The enclosure meets NEMA 12/IP54 protection requirements, guarding the internal optics against dust and splashed fluids commonly encountered on plant floors. The housing relies on passive heat dissipation and does not require active cooling during operation.
