Product Description:

The HS35R2048H37C is an incremental hollow-shaft encoder manufactured by Danaher and supplied under the Dynapar Encoders series. Designed for motor feedback, conveyor monitoring, and general speed regulation, the unit converts shaft rotation into square-wave signals that a drive or PLC can count. Its 2,048-pulse-per-revolution code wheel provides fine velocity and position resolution, allowing closed-loop control without direct mechanical linkages. A slotted hub and tether arm accommodate foot-mounted motors, while the double-sealed housing makes this model suitable for washdown production areas in processing and material-handling facilities.

The enclosure carries a NEMA 4/IP66 rating, preventing sprayed water and airborne dust from entering the encoder body when the shaft seal is seated correctly. The sensing electronics can track shaft speeds up to 3,600 rpm and provide a frequency response of at least 100 kHz on the A and B channels. The driver circuits draw no more than 100 mA, reducing the load placed on 5 V logic rails in multi-axis control panels. Quadrature phasing is 90° ±22.5° electrical, while symmetry remains 180° ±18°. These timing characteristics produce evenly spaced pulses for direction decoding and duty-cycle calculations within the motion controller.

The axial bearings tolerate loads up to 30 lb, while the radial bearings support loads up to 40 lb, allowing the encoder to mount directly on fan or pulley shafts without auxiliary couplings. Starting torque is limited to 5.0 oz-in, and running torque decreases to 4.5 oz-in, allowing small servomotors to accelerate the encoder disk without substantial resistance. During impact events, the housing withstands 50 G for 11 ms. Output edges maintain timing accuracy with a rise and fall time of <1 µs. The hollow-shaft assembly weighs no more than 16 oz, limiting the additional mass supported by the motor shaft and mounting hardware.