EncoderWorks provides a custom compatible replacement solution for 804061-01 RSA 608 focused on maintaining SSI Gray multiturn communication, incremental HTL feedback integration, and Ø6 mm shaft mechanical compatibility. The replacement challenge is not only matching the 25-bit absolute position output, but also preserving the combined SSI and incremental signal structure, preset/code sequence functions, and controller-side feedback interpretation. A system may receive absolute position data correctly while differences in incremental signals or timing behavior still affect machine synchronization.
System Limits
The primary replacement boundary for this model is maintaining consistency between absolute and incremental feedback channels. The 804061-01 RSA 608 uses SSI Gray output with 25-bit absolute resolution, consisting of 13-bit singleturn and 12-bit multiturn data, together with 1024 PPR HTL incremental signals. SSI clock/data timing, Gray code interpretation, S00/S90 phase signals, signal direction, preset behavior, and code sequence configuration must be matched because differences between feedback channels can result in position deviation, incorrect speed feedback, or additional commissioning adjustments.
The mechanical integration boundary includes shaft fit, flange mounting, and cable installation stability. This model uses a Ø6 mm round shaft with a synchro flange (63-type) mounting structure and a 5 m radial cable connection. Shaft alignment, flange positioning, cable routing, shielding, and grounding continuity should be maintained because mechanical mismatch or electrical interference can affect long-term feedback reliability in industrial applications.
Wiring & Installation
The hybrid interface requires verification of SSI clock, clock inverted, data, data inverted, S00/S90 incremental signals, preset, status, code sequence, power supply, and shield connections. The configuration combines serial absolute feedback with HTL incremental outputs, so incorrect signal mapping, missing complementary signals, poor shielding, or improper grounding may result in unstable feedback, incorrect direction detection, or inconsistent controller response.
During replacement installation, the Ø6 mm round shaft and synchro flange interface should be checked against the existing machine structure. The radial cable outlet, cable routing, shaft alignment, vibration conditions, and signal separation should be considered together because combined SSI and HTL feedback systems require stable electrical integration.
Custom Compatible Solution
- Match SSI Gray multiturn communication behavior and controller-side absolute position interpretation.
- Preserve 25-bit absolute resolution structure and 1024 PPR HTL incremental feedback signals.
- Adapt Ø6 mm round shaft and synchro flange (63-type) mounting requirements.
- Validate SSI timing, HTL signal mapping, preset/code sequence functions, shielding, and grounding conditions.
Typical production lead time: 15 working days.
Key Data
| Parameter | Specification |
|---|---|
| Model | 804061-01 RSA 608 |
| Encoder Type | Absolute Multiturn Encoder with Incremental Output |
| Interface | SSI Gray + HTL Incremental |
| Absolute Resolution | 25 bit (13 bit Singleturn + 12 bit Multiturn) |
| Incremental Output | 1024 PPR HTL |
| Shaft Type | Ø6 mm Round Shaft |
| Flange Type | Synchro Flange (63-Type) |
| Connection | Radial Cable |
| Cable Length | 5 m |
| Supply Voltage | 9–30 VDC |
| Protection | IP67 / IP66 |
| Main Replacement Focus | SSI/HTL signal matching, hybrid feedback integration, and shaft adaptation |
