For AVM78E-012KRR0BN-1416, EncoderWorks can provide a custom compatible replacement focused on binary SSI terminal mapping, 16/14-bit position scaling, and Ø10 mm servo-flange shaft fit. This model should not be treated like a clamping-flange version or a lower 12/12-bit configuration. The replacement risk is whether the PLC receives the same 30-bit absolute position while terminal wiring, preset logic, counting direction, and flameproof cable-entry handling remain consistent.
The AVM78E-012KRR0BN-1416 is an explosion-proof SSI multiturn absolute rotary encoder configuration with binary code, 16-bit singleturn resolution, 14-bit multiturn range, 10–30 VDC supply, aluminum housing execution, Ø10 mm x 20 mm solid shaft, servo flange, KR terminal compartment, and radial exit. The controller should continue reading 65536 steps per revolution across 16384 turns.
The first failure boundary is SSI word interpretation. Clock+ / Clock- and Data+ / Data- must remain true RS422 differential pairs. If terminal assignment, binary decoding, clock pause, preset wiring, or 16/14-bit word length is changed, the SSI frame can be present while the PLC calculates the wrong absolute position.
This replacement fails when SSI communication is present, but the PLC reads the wrong position because terminal mapping, binary decoding, 16/14-bit scaling, 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 servo-flange mechanics. The Ø10 mm solid shaft, coupling fit, servo-flange centering, radial terminal exit, grounding, and shaft load must be checked together. Flameproof terminal access must preserve cable-entry sealing and hazardous-area integrity.
The replacement decision should first confirm binary SSI format, 16-bit singleturn and 14-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, aluminum housing execution, Ø10 mm solid-shaft fit, servo-flange mounting, radial exit clearance, shield grounding, flameproof cable entry, and shaft load. EncoderWorks treats AVM78E-012KRR0BN-1416 as an industrial encoder custom compatible solution where SSI word length and servo-flange alignment decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | AVM78E-012KRR0BN-1416 |
| Encoder type | Explosion-proof multiturn absolute rotary encoder |
| Interface | SSI / RS422 |
| Resolution | 16-bit singleturn + 14-bit multiturn |
| Position range | 65536 steps x 16384 turns |
| Code | Binary |
| Supply voltage | 10–30 VDC |
| Transfer rate | 0.1–2 MBit/s |
| Housing execution | Aluminum |
| Shaft type | Solid shaft |
| Shaft size | Ø10 mm x 20 mm |
| Flange | Servo flange |
| Connection | KR terminal compartment |
| Exit position | Radial |
| Protection focus | ATEX / IECEx flameproof enclosure, IP66 |
| Main engineering anchor | Binary SSI and servo flange |
| Main failure boundary | Wrong terminal mapping, binary decoding error, word-length mismatch, flameproof entry error |
