Product Description:

The HS35R2500K345 is a hollow-shaft incremental encoder produced by Danaher as part of the Dynapar Encoders series. In motion-control assemblies, the device mounts on a motor or drive shaft and converts mechanical rotation into proportional electrical pulse trains, enabling closed-loop speed or position feedback for drives, conveyors, or machine tools. Its compact form and protected housing allow installation in industrial environments where reliable signal generation is essential for automation accuracy.

At the core of its feedback capability is a resolution of 2500 PPR, meaning each mechanical revolution is translated into 2,500 distinct pulses for the receiving controller. The output stages support a frequency response of 100 kHz minimum, so full resolution is maintained even at elevated shaft speeds. Electrical performance includes a maximum input current of 100 mA, allowing a direct interface with common line-driver receivers. Signal integrity is aided by a rise and fall time of <1 µs, which limits timing skew in high-speed counting circuits. The optical encoder wheel may rotate at up to 3600 rpm without loss of accuracy, while quadrature phasing is maintained within ±22.5° electrical and symmetry remains within ±18° electrical.

Bearing life is rated at 80,000 hours when the encoder operates at its upper speed limit, and starting torque remains below 5.0 oz-in while running torque stays under 4.5 oz-in. Radial loads of up to 40 lb and axial loads of up to 30 lb can be applied to the mounting hub. The housing carries a NEMA 4/IP66 rating, sealing the internal optics against dust and water jets. The encoder withstands a shock of 50 G for 11 ms without electrical failure. It weighs only 16 oz, which supports installation on small servo motors without adding excessive mass to the assembly.