HSD3510246C4 Incremental Encoder with 12 mm Bore and AB Output

For HSD3510246C4, 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, 12 mm bore fit, and 8.5" C-Face tether preload. This version should not be treated like HSD3510246A7, because it does not provide a Z index channel and the mounting changes from fan-cover tether to 8.5" C-Face tether. Typical production lead time: 15 working days.

This model belongs to the HSD35 heavy-duty optical incremental encoder series. In the HSD3510246C4 configuration, the encoder provides 1024 pulses per revolution, a 12 mm electrically isolated hollow bore, an 8.5" C-Face tether with 1/2" bolt, and differential AB output using the 7272 driver format with 5–26 VDC input and 5–26 V output. Replacement work should focus on A/A- and B/B- wiring, receiver compatibility, quadrature decoding mode, hollow-shaft clamping, C-Face tether alignment, and 10-pin connector assignment.

System Limits

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

The second limit is counter frequency margin. At 1024 PPR, the real 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 12 mm hollow-shaft clamp and 8.5" C-Face tether. The bore must match the shaft without forcing the clamp, while the tether should stop housing rotation without side-loading the bearings. Excess tether preload can create vibration, bearing stress, or intermittent feedback faults.

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 differential ABZ, 4469 output, open collector, or single-ended push-pull 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, C-Face tether movement, 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 12 mm electrically isolated hollow bore, clamp fit, 8.5" C-Face tether, and 1/2" bolt mounting
• 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 tether preload

Key Data