HSD351024804 Incremental Encoder with 5/8" Bore and AB Output

For HSD351024804, EncoderWorks can provide a custom compatible replacement solution for heavy-duty hollow-shaft incremental feedback systems where the key checks are 1024 PPR counter scaling, 7272 differential AB-only signal matching, 5/8" bore fit, and anti-rotation mounting control. This version should not be treated like the HSD3510247AC, because it changes from a 1/2" fan-cover tether configuration with 4469 output to a 5/8" bore version with no tether option and 5–26 V differential AB output. Typical production lead time: 15 working days.

This model belongs to the HSD35 heavy-duty optical incremental encoder series. In the HSD351024804 configuration, the encoder provides 1024 pulses per revolution, a 5/8" electrically isolated hollow bore, no specified tether option, and differential AB output using the 7272 driver format with 5–26 VDC input and 5–26 V output. Replacement work should focus on receiver compatibility, A/A- and B/B- wiring, quadrature decoding mode, hollow-shaft clamping, anti-rotation method, and 10-pin connector assignment.

System Limits

The main electrical limit is 7272 differential AB compatibility. The controller input must accept 5–26 V differential A/A- and B/B- signals. If the system expects 4469 5–15 V output, differential ABZ with Z/Z-, single-ended push-pull, open collector, or dual isolated feedback, the encoder may count incorrectly or fail on reference-position logic.

The second limit is counter frequency margin. At 1024 PPR, the input load depends on shaft speed and x1, x2, or x4 quadrature decoding. The counter should be checked against the 200 kHz data frequency limit, A/B phase tolerance, and direction logic.

The mechanical limit is the 5/8" hollow-shaft clamp and the missing tether selection. The bore must fit the shaft without forcing the clamp, and the installation must still prevent encoder housing rotation without applying side load to the bearings.

Wiring & Installation

Before removing the existing encoder, record the 10-pin connector wiring for Common, Signal A, Signal B, Vcc, Signal A_, and Signal B_. Confirm that the controller expects 7272 differential AB-only feedback rather than 4469 output, ABZ feedback, open collector, or single-ended feedback.

After installation, rotate the shaft slowly and confirm that A leads B for clockwise shaft rotation when viewed from the clamp end. Then check 1024 PPR scaling, direction trend, clamp stability, housing anti-rotation behavior, and counter stability at operating speed.

Custom Compatible Solution

EncoderWorks can configure the replacement around the installed drive and counter system:

• Match 1024 PPR differential AB output, 7272 driver behavior, and 5–26 V receiver compatibility
• Adapt the 5/8" electrically isolated hollow bore, clamp fit, and anti-rotation requirements
• Verify A/B phase direction, quadrature decoding mode, counter scaling, and frequency margin
• Review 10-pin connector wiring, shield grounding, cable routing, shaft isolation, and housing movement

Key Data