For AVM78E-011YYRYGI-1213, EncoderWorks can provide a custom compatible replacement focused on Gray-code SSI mapping, 13/12-bit position scaling, 10 m cable definition, and stainless-steel clamping-flange shaft fit. This model should not be treated like the newer K2, K5, or KR versions. The YY cable execution, older SSI timing range, INOX material, and hazardous-area approval boundary must be checked as a complete replacement package.
The AVM78E-011YYRYGI-1213 is an explosion-proof SSI multiturn absolute rotary encoder configuration with Gray code, 13-bit singleturn resolution, 12-bit multiturn range, 10–30 VDC supply, stainless-steel housing execution, Ø10 mm x 20 mm solid shaft, clamping flange, radial 7-core 10 m cable connection, and flameproof IP66 construction. The controller should continue reading 8192 steps per revolution across 4096 turns.
The first failure boundary is SSI cable assignment. Clock+ / Clock- and Data+ / Data- must remain true RS422 differential pairs. If the 7-core cable assignment, Gray decoding, shield grounding, clock pause, or 25-bit word interpretation is copied incorrectly, the PLC can receive a valid SSI stream while calculating the wrong absolute position.
This replacement fails when SSI communication is present, but the PLC reads the wrong position because cable mapping, Gray-code decoding, 13/12-bit word length, monoflop timing, or controller baud-rate setting does not match the original encoder. That is a signal-chain and parameter failure, not simply a sensing failure.
The second boundary is old-version flameproof mechanics. The Ø10 mm solid shaft, clamping-flange reference, radial cable exit, stainless-steel housing, grounding, and shaft load must be checked together. A newer housing style or cable structure should not be assumed compatible without confirming dimensions and cable-entry requirements.
The replacement decision should first confirm Gray SSI format, 13-bit singleturn and 12-bit multiturn mapping, YY 7-core 10 m radial cable assignment, Clock/Data differential pairs, 20 ±10 µs monoflop behavior, 10–30 VDC supply, stainless-steel housing execution, Ø10 mm solid-shaft fit, clamping-flange mounting, radial cable clearance, shield grounding, flameproof cable handling, hazardous-area marking, and shaft load. EncoderWorks treats AVM78E-011YYRYGI-1213 as an industrial encoder custom compatible solution where SSI cable accuracy and old-version INOX mechanics decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | AVM78E-011YYRYGI-1213 |
| Encoder type | Explosion-proof multiturn absolute rotary encoder |
| Interface | SSI / RS422 |
| Resolution | 13-bit singleturn + 12-bit multiturn |
| Position range | 8192 steps x 4096 turns |
| Overall resolution | 25 bit |
| Code | Gray |
| Supply voltage | 10–30 VDC |
| Transfer rate | 0.05–1.5 MBit/s |
| Housing execution | Stainless steel |
| Shaft type | Solid shaft |
| Shaft size | Ø10 mm x 20 mm |
| Flange | Clamping flange |
| Connection | YY cable, 7-core, 10 m |
| Exit position | Radial |
| Protection focus | ATEX / IECEx flameproof enclosure, IP66 |
| Main engineering anchor | Gray SSI and 10 m cable |
| Main failure boundary | Wrong cable mapping, Gray decoding error, old-version mismatch, flameproof entry error |
