For AVM78E-011KRR0BI-1212, EncoderWorks can provide a custom compatible replacement focused on binary SSI terminal mapping, 12/12-bit position scaling, INOX housing execution, and Ø10 mm clamping-flange shaft fit. This model should not be treated like the aluminum version or a cable-output encoder. The main replacement boundary is terminal accuracy, binary word interpretation, and flameproof clamping-flange mechanics.
The AVM78E-011KRR0BI-1212 is an explosion-proof SSI multiturn absolute rotary encoder configuration with binary code, 12-bit singleturn resolution, 12-bit multiturn range, 10–30 VDC supply, stainless-steel housing execution, Ø10 mm x 20 mm solid shaft, clamping flange, KR terminal compartment, and radial exit. The controller should continue reading 4096 steps per revolution across 4096 turns.
The first failure boundary is SSI terminal wiring. Clock+ / Clock- and Data+ / Data- must remain true RS422 differential pairs. If terminal numbers, shield grounding, binary decoding, preset input, or counting-direction input are changed, the SSI data can be present while the PLC reads the wrong absolute position.
This replacement fails when SSI communication is present, but the PLC reads the wrong position because terminal mapping, binary decoding, 12/12-bit word length, monoflop timing, preset input, or counting direction does not match the original encoder. That is a signal-chain and parameter failure, not simply a sensing failure.
The second boundary is INOX clamping-flange installation. The Ø10 mm solid shaft, clamping-flange reference, coupling fit, radial terminal exit, grounding, and shaft load must be checked together. Flameproof terminal access must not compromise hazardous-area sealing or cable-entry integrity.
The replacement decision should first confirm binary SSI format, 12-bit singleturn and 12-bit multiturn mapping, KR radial terminal-compartment wiring, Clock/Data differential pairs, 20 ±10 µs monoflop behavior, 10–30 VDC supply, PRESET zero-set input, counting-direction input, stainless-steel housing execution, Ø10 mm solid-shaft fit, clamping-flange mounting, radial exit clearance, shield grounding, flameproof cable entry, and shaft load. EncoderWorks treats AVM78E-011KRR0BI-1212 as an industrial encoder custom compatible solution where SSI terminal accuracy and INOX clamp-shaft mechanics decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | AVM78E-011KRR0BI-1212 |
| Encoder type | Explosion-proof multiturn absolute rotary encoder |
| Interface | SSI / RS422 |
| Resolution | 12-bit singleturn + 12-bit multiturn |
| Position range | 4096 steps x 4096 turns |
| Code | Binary |
| Supply voltage | 10–30 VDC |
| Transfer rate | 0.1–2 MBit/s |
| Housing execution | Stainless steel |
| Shaft type | Solid shaft |
| Shaft size | Ø10 mm x 20 mm |
| Flange | Clamping flange |
| Connection | KR terminal compartment |
| Exit position | Radial |
| Protection focus | ATEX / IECEx flameproof enclosure, IP66 |
| Main engineering anchor | Binary SSI and INOX clamp shaft |
| Main failure boundary | Wrong terminal mapping, binary decoding error, preset fault, flameproof entry error |
